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llvm-project/llvm/lib/Target/X86/X86TargetTransformInfo.cpp

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Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
//===-- X86TargetTransformInfo.cpp - X86 specific TTI pass ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
/// This file implements a TargetTransformInfo analysis pass specific to the
/// X86 target machine. It uses the target's detailed information to provide
/// more precise answers to certain TTI queries, while letting the target
/// independent and default TTI implementations handle the rest.
///
//===----------------------------------------------------------------------===//
NFC: The Cost Model specialization, by Andrey Tischenko The current Cost Model implementation is very inaccurate and has to be updated, improved, re-implemented to be able to take into account the concrete CPU models and the concrete targets where this Cost Model is being used. For example, the Latency Cost Model should be differ from Code Size Cost Model, etc. This patch is the first step to launch the developing and implementation of a new Cost Model generation. Differential Revision: https://reviews.llvm.org/D25186 llvm-svn: 284012
2016-10-12 21:24:13 +08:00
/// About Cost Model numbers used below it's necessary to say the following:
/// the numbers correspond to some "generic" X86 CPU instead of usage of
/// concrete CPU model. Usually the numbers correspond to CPU where the feature
/// apeared at the first time. For example, if we do Subtarget.hasSSE42() in
/// the lookups below the cost is based on Nehalem as that was the first CPU
/// to support that feature level and thus has most likely the worst case cost.
/// Some examples of other technologies/CPUs:
/// SSE 3 - Pentium4 / Athlon64
/// SSE 4.1 - Penryn
/// SSE 4.2 - Nehalem
/// AVX - Sandy Bridge
/// AVX2 - Haswell
/// AVX-512 - Xeon Phi / Skylake
/// And some examples of instruction target dependent costs (latency)
/// divss sqrtss rsqrtss
/// AMD K7 11-16 19 3
/// Piledriver 9-24 13-15 5
/// Jaguar 14 16 2
/// Pentium II,III 18 30 2
/// Nehalem 7-14 7-18 3
/// Haswell 10-13 11 5
/// TODO: Develop and implement the target dependent cost model and
/// specialize cost numbers for different Cost Model Targets such as throughput,
/// code size, latency and uop count.
//===----------------------------------------------------------------------===//
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
[PM] Switch the TargetMachine interface from accepting a pass manager base which it adds a single analysis pass to, to instead return the type erased TargetTransformInfo object constructed for that TargetMachine. This removes all of the pass variants for TTI. There is now a single TTI *pass* in the Analysis layer. All of the Analysis <-> Target communication is through the TTI's type erased interface itself. While the diff is large here, it is nothing more that code motion to make types available in a header file for use in a different source file within each target. I've tried to keep all the doxygen comments and file boilerplate in line with this move, but let me know if I missed anything. With this in place, the next step to making TTI work with the new pass manager is to introduce a really simple new-style analysis that produces a TTI object via a callback into this routine on the target machine. Once we have that, we'll have the building blocks necessary to accept a function argument as well. llvm-svn: 227685
2015-01-31 19:17:59 +08:00
#include "X86TargetTransformInfo.h"
Move TargetTransformInfo to live under the Analysis library. This no longer would violate any dependency layering and it is in fact an analysis. =] llvm-svn: 171686
2013-01-07 11:08:10 +08:00
#include "llvm/Analysis/TargetTransformInfo.h"
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
#include "llvm/CodeGen/BasicTTIImpl.h"
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
#include "llvm/IR/IntrinsicInst.h"
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
#include "llvm/Support/Debug.h"
Moving Cost Tables up to share with other targets llvm-svn: 173382
2013-01-25 07:01:00 +08:00
#include "llvm/Target/CostTable.h"
Re-sort all of the includes with ./utils/sort_includes.py so that subsequent changes are easier to review. About to fix some layering issues, and wanted to separate out the necessary churn. Also comment and sink the include of "Windows.h" in three .inc files to match the usage in Memory.inc. llvm-svn: 198685
2014-01-07 19:48:04 +08:00
#include "llvm/Target/TargetLowering.h"
Fix Clang-tidy modernize-use-nullptr warnings in source directories and generated files; other minor cleanups. Patch by Eugene Zelenko! Differential Revision: http://reviews.llvm.org/D13321 llvm-svn: 249482
2015-10-07 07:24:35 +08:00
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
using namespace llvm;
[Modules] Fix potential ODR violations by sinking the DEBUG_TYPE definition below all of the header #include lines, lib/Target/... edition. llvm-svn: 206842
2014-04-22 10:41:26 +08:00
#define DEBUG_TYPE "x86tti"
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
//===----------------------------------------------------------------------===//
//
// X86 cost model.
//
//===----------------------------------------------------------------------===//
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
TargetTransformInfo::PopcntSupportKind
X86TTIImpl::getPopcntSupport(unsigned TyWidth) {
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");
// TODO: Currently the __builtin_popcount() implementation using SSE3
// instructions is inefficient. Once the problem is fixed, we should
Using popcount should check the popcount feature flag not the SSE41 feature flag. llvm-svn: 190258
2013-09-08 08:47:31 +08:00
// call ST->hasSSE3() instead of ST->hasPOPCNT().
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return ST->hasPOPCNT() ? TTI::PSK_FastHardware : TTI::PSK_Software;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
unsigned X86TTIImpl::getNumberOfRegisters(bool Vector) {
ARM Cost model: Use the size of vector registers and widest vectorizable instruction to determine the max vectorization factor. llvm-svn: 172010
2013-01-10 06:29:00 +08:00
if (Vector && !ST->hasSSE1())
return 0;
[X86] AVX512: Enable it in the Loop Vectorizer This lets us experiment with 512-bit vectorization without passing force-vector-width manually. The code generated for a simple integer memset loop is properly vectorized. Disassembly is still broken for it though :(. llvm-svn: 212634
2014-07-10 02:22:33 +08:00
if (ST->is64Bit()) {
if (Vector && ST->hasAVX512())
return 32;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
return 16;
[X86] AVX512: Enable it in the Loop Vectorizer This lets us experiment with 512-bit vectorization without passing force-vector-width manually. The code generated for a simple integer memset loop is properly vectorized. Disassembly is still broken for it though :(. llvm-svn: 212634
2014-07-10 02:22:33 +08:00
}
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
return 8;
}
[X86 TTI] Implement LSV hook Summary: LSV wants to know the maximum size that can be loaded to a vector register. On X86, this always matches the maximum register width. Implement this accordingly and add a test to make sure that LSV can vectorize up to the maximum permissible width on X86. Reviewers: delena, arsenm Reviewed By: arsenm Subscribers: wdng, llvm-commits Differential Revision: https://reviews.llvm.org/D31504 llvm-svn: 299589
2017-04-06 04:51:38 +08:00
unsigned X86TTIImpl::getRegisterBitWidth(bool Vector) const {
ARM Cost model: Use the size of vector registers and widest vectorizable instruction to determine the max vectorization factor. llvm-svn: 172010
2013-01-10 06:29:00 +08:00
if (Vector) {
Remove trailing whitespace. NFCI. llvm-svn: 291163
2017-01-06 03:24:25 +08:00
if (ST->hasAVX512())
[Test Commit] fixing some format issue in X86TTI to match clang-format output. llvm-svn: 291095
2017-01-05 17:51:02 +08:00
return 512;
Remove trailing whitespace. NFCI. llvm-svn: 291163
2017-01-06 03:24:25 +08:00
if (ST->hasAVX())
[Test Commit] fixing some format issue in X86TTI to match clang-format output. llvm-svn: 291095
2017-01-05 17:51:02 +08:00
return 256;
Remove trailing whitespace. NFCI. llvm-svn: 291163
2017-01-06 03:24:25 +08:00
if (ST->hasSSE1())
[Test Commit] fixing some format issue in X86TTI to match clang-format output. llvm-svn: 291095
2017-01-05 17:51:02 +08:00
return 128;
ARM Cost model: Use the size of vector registers and widest vectorizable instruction to determine the max vectorization factor. llvm-svn: 172010
2013-01-10 06:29:00 +08:00
return 0;
}
if (ST->is64Bit())
return 64;
Fix Clang-tidy modernize-use-nullptr warnings in source directories and generated files; other minor cleanups. Patch by Eugene Zelenko! Differential Revision: http://reviews.llvm.org/D13321 llvm-svn: 249482
2015-10-07 07:24:35 +08:00
return 32;
ARM Cost model: Use the size of vector registers and widest vectorizable instruction to determine the max vectorization factor. llvm-svn: 172010
2013-01-10 06:29:00 +08:00
}
[X86 TTI] Implement LSV hook Summary: LSV wants to know the maximum size that can be loaded to a vector register. On X86, this always matches the maximum register width. Implement this accordingly and add a test to make sure that LSV can vectorize up to the maximum permissible width on X86. Reviewers: delena, arsenm Reviewed By: arsenm Subscribers: wdng, llvm-commits Differential Revision: https://reviews.llvm.org/D31504 llvm-svn: 299589
2017-04-06 04:51:38 +08:00
unsigned X86TTIImpl::getLoadStoreVecRegBitWidth(unsigned) const {
return getRegisterBitWidth(true);
}
[X86] Disable loop unrolling in loop vectorization pass when VF is 1. The patch disabled unrolling in loop vectorization pass when VF==1 on x86 architecture, by setting MaxInterleaveFactor to 1. Unrolling in loop vectorization pass may introduce the cost of overflow check, memory boundary check and extra prologue/epilogue code when regular unroller will unroll the loop another time. Disable it when VF==1 remove the unnecessary cost on x86. The same can be done for other platforms after verifying interleaving/memory bound checking to be not perf critical on those platforms. Differential Revision: http://reviews.llvm.org/D9515 llvm-svn: 236613
2015-05-07 01:12:25 +08:00
unsigned X86TTIImpl::getMaxInterleaveFactor(unsigned VF) {
// If the loop will not be vectorized, don't interleave the loop.
// Let regular unroll to unroll the loop, which saves the overflow
// check and memory check cost.
if (VF == 1)
return 1;
Cost Model: Move the 'max unroll factor' variable to the TTI and add initial Cost Model support on ARM. llvm-svn: 171928
2013-01-09 09:15:42 +08:00
if (ST->isAtom())
return 1;
// Sandybridge and Haswell have multiple execution ports and pipelined
// vector units.
if (ST->hasAVX())
return 4;
return 2;
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getArithmeticInstrCost(
Remove trailing whitespace. NFCI. llvm-svn: 292613
2017-01-20 23:15:59 +08:00
unsigned Opcode, Type *Ty,
[X86] updating TTI costs for arithmetic instructions on X86\SLM arch. updated instructions: pmulld, pmullw, pmulhw, mulsd, mulps, mulpd, divss, divps, divsd, divpd, addpd and subpd. special optimization case which replaces pmulld with pmullw\pmulhw\pshuf seq. In case if the real operands bitwidth <= 16. Differential Revision: https://reviews.llvm.org/D28104 llvm-svn: 291657
2017-01-11 16:23:37 +08:00
TTI::OperandValueKind Op1Info, TTI::OperandValueKind Op2Info,
TTI::OperandValueProperties Opd1PropInfo,
TTI::OperandValueProperties Opd2PropInfo,
ArrayRef<const Value *> Args) {
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
// Legalize the type.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, Ty);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
int ISD = TLI->InstructionOpcodeToISD(Opcode);
assert(ISD && "Invalid opcode");
[X86] updating TTI costs for arithmetic instructions on X86\SLM arch. updated instructions: pmulld, pmullw, pmulhw, mulsd, mulps, mulpd, divss, divps, divsd, divpd, addpd and subpd. special optimization case which replaces pmulld with pmullw\pmulhw\pshuf seq. In case if the real operands bitwidth <= 16. Differential Revision: https://reviews.llvm.org/D28104 llvm-svn: 291657
2017-01-11 16:23:37 +08:00
static const CostTblEntry SLMCostTable[] = {
{ ISD::MUL, MVT::v4i32, 11 }, // pmulld
{ ISD::MUL, MVT::v8i16, 2 }, // pmullw
{ ISD::MUL, MVT::v16i8, 14 }, // extend/pmullw/trunc sequence.
{ ISD::FMUL, MVT::f64, 2 }, // mulsd
{ ISD::FMUL, MVT::v2f64, 4 }, // mulpd
{ ISD::FMUL, MVT::v4f32, 2 }, // mulps
{ ISD::FDIV, MVT::f32, 17 }, // divss
{ ISD::FDIV, MVT::v4f32, 39 }, // divps
{ ISD::FDIV, MVT::f64, 32 }, // divsd
{ ISD::FDIV, MVT::v2f64, 69 }, // divpd
{ ISD::FADD, MVT::v2f64, 2 }, // addpd
{ ISD::FSUB, MVT::v2f64, 2 }, // subpd
[X86][CM] update add\sub costs of vectors of 64 in X86\SLM arch this patch updates the cost of addq\subq (add\subtract of vectors of 64bits) based on the performance numbers of SLM arch. Differential Revision: https://reviews.llvm.org/D33983 llvm-svn: 306974
2017-07-02 20:16:15 +08:00
// v2i64/v4i64 mul is custom lowered as a series of long:
// multiplies(3), shifts(3) and adds(2)
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
// slm muldq version throughput is 2 and addq throughput 4
[X86][CM] update add\sub costs of vectors of 64 in X86\SLM arch this patch updates the cost of addq\subq (add\subtract of vectors of 64bits) based on the performance numbers of SLM arch. Differential Revision: https://reviews.llvm.org/D33983 llvm-svn: 306974
2017-07-02 20:16:15 +08:00
// thus: 3X2 (muldq throughput) + 3X1 (shift throuput) +
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
// 3X4 (addq throughput) = 17
[X86][CM] update add\sub costs of vectors of 64 in X86\SLM arch this patch updates the cost of addq\subq (add\subtract of vectors of 64bits) based on the performance numbers of SLM arch. Differential Revision: https://reviews.llvm.org/D33983 llvm-svn: 306974
2017-07-02 20:16:15 +08:00
{ ISD::MUL, MVT::v2i64, 17 },
// slm addq\subq throughput is 4
{ ISD::ADD, MVT::v2i64, 4 },
{ ISD::SUB, MVT::v2i64, 4 },
[X86] updating TTI costs for arithmetic instructions on X86\SLM arch. updated instructions: pmulld, pmullw, pmulhw, mulsd, mulps, mulpd, divss, divps, divsd, divpd, addpd and subpd. special optimization case which replaces pmulld with pmullw\pmulhw\pshuf seq. In case if the real operands bitwidth <= 16. Differential Revision: https://reviews.llvm.org/D28104 llvm-svn: 291657
2017-01-11 16:23:37 +08:00
};
if (ST->isSLM()) {
if (Args.size() == 2 && ISD == ISD::MUL && LT.second == MVT::v4i32) {
// Check if the operands can be shrinked into a smaller datatype.
bool Op1Signed = false;
unsigned Op1MinSize = BaseT::minRequiredElementSize(Args[0], Op1Signed);
bool Op2Signed = false;
unsigned Op2MinSize = BaseT::minRequiredElementSize(Args[1], Op2Signed);
bool signedMode = Op1Signed | Op2Signed;
unsigned OpMinSize = std::max(Op1MinSize, Op2MinSize);
if (OpMinSize <= 7)
return LT.first * 3; // pmullw/sext
if (!signedMode && OpMinSize <= 8)
return LT.first * 3; // pmullw/zext
if (OpMinSize <= 15)
return LT.first * 5; // pmullw/pmulhw/pshuf
if (!signedMode && OpMinSize <= 16)
return LT.first * 5; // pmullw/pmulhw/pshuf
}
if (const auto *Entry = CostTableLookup(SLMCostTable, ISD,
LT.second)) {
return LT.first * Entry->Cost;
}
}
Allow vectorization of division by uniform power of 2. This patch adds support to recognize division by uniform power of 2 and modifies the cost table to vectorize division by uniform power of 2 whenever possible. Updates Cost model for Loop and SLP Vectorizer.The cost table is currently only updated for X86 backend. Thanks to Hal, Andrea, Sanjay for the review. (http://reviews.llvm.org/D4971) llvm-svn: 216371
2014-08-25 12:56:54 +08:00
if (ISD == ISD::SDIV &&
Op2Info == TargetTransformInfo::OK_UniformConstantValue &&
Opd2PropInfo == TargetTransformInfo::OP_PowerOf2) {
// On X86, vector signed division by constants power-of-two are
// normally expanded to the sequence SRA + SRL + ADD + SRA.
// The OperandValue properties many not be same as that of previous
// operation;conservatively assume OP_None.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int Cost = 2 * getArithmeticInstrCost(Instruction::AShr, Ty, Op1Info,
Op2Info, TargetTransformInfo::OP_None,
TargetTransformInfo::OP_None);
Allow vectorization of division by uniform power of 2. This patch adds support to recognize division by uniform power of 2 and modifies the cost table to vectorize division by uniform power of 2 whenever possible. Updates Cost model for Loop and SLP Vectorizer.The cost table is currently only updated for X86 backend. Thanks to Hal, Andrea, Sanjay for the review. (http://reviews.llvm.org/D4971) llvm-svn: 216371
2014-08-25 12:56:54 +08:00
Cost += getArithmeticInstrCost(Instruction::LShr, Ty, Op1Info, Op2Info,
TargetTransformInfo::OP_None,
TargetTransformInfo::OP_None);
Cost += getArithmeticInstrCost(Instruction::Add, Ty, Op1Info, Op2Info,
TargetTransformInfo::OP_None,
TargetTransformInfo::OP_None);
return Cost;
}
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
static const CostTblEntry AVX512BWUniformConstCostTable[] = {
[CostModel][X86] Fixed vXi8 uniform shift costs. The 'fast' costs should only work for shifts by uniform constants (uniform non-constant are lowered using the slow default implementation). Logical shifts were not taking into account that we must mask the psrlw result, so the costs needed to be doubled. Added missing AVX2/AVX512BW costs as well. llvm-svn: 291391
2017-01-08 22:14:36 +08:00
{ ISD::SHL, MVT::v64i8, 2 }, // psllw + pand.
{ ISD::SRL, MVT::v64i8, 2 }, // psrlw + pand.
{ ISD::SRA, MVT::v64i8, 4 }, // psrlw, pand, pxor, psubb.
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
{ ISD::SDIV, MVT::v32i16, 6 }, // vpmulhw sequence
{ ISD::UDIV, MVT::v32i16, 6 }, // vpmulhuw sequence
};
if (Op2Info == TargetTransformInfo::OK_UniformConstantValue &&
ST->hasBWI()) {
if (const auto *Entry = CostTableLookup(AVX512BWUniformConstCostTable, ISD,
LT.second))
return LT.first * Entry->Cost;
}
static const CostTblEntry AVX512UniformConstCostTable[] = {
[CostModel][X86] Updated vXi64 ASHR costs on AVX512 targets now that D28604 has landed llvm-svn: 292023
2017-01-15 03:24:23 +08:00
{ ISD::SRA, MVT::v2i64, 1 },
{ ISD::SRA, MVT::v4i64, 1 },
{ ISD::SRA, MVT::v8i64, 1 },
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
{ ISD::SDIV, MVT::v16i32, 15 }, // vpmuldq sequence
{ ISD::UDIV, MVT::v16i32, 15 }, // vpmuludq sequence
};
if (Op2Info == TargetTransformInfo::OK_UniformConstantValue &&
ST->hasAVX512()) {
if (const auto *Entry = CostTableLookup(AVX512UniformConstCostTable, ISD,
LT.second))
return LT.first * Entry->Cost;
}
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX2UniformConstCostTable[] = {
[CostModel][X86] Fixed vXi8 uniform shift costs. The 'fast' costs should only work for shifts by uniform constants (uniform non-constant are lowered using the slow default implementation). Logical shifts were not taking into account that we must mask the psrlw result, so the costs needed to be doubled. Added missing AVX2/AVX512BW costs as well. llvm-svn: 291391
2017-01-08 22:14:36 +08:00
{ ISD::SHL, MVT::v32i8, 2 }, // psllw + pand.
{ ISD::SRL, MVT::v32i8, 2 }, // psrlw + pand.
{ ISD::SRA, MVT::v32i8, 4 }, // psrlw, pand, pxor, psubb.
[X86][SSE] Vectorized i64 uniform constant SRA shifts This patch adds vectorization support for uniform constant i64 arithmetic shift right operators. Differential Revision: http://reviews.llvm.org/D9645 llvm-svn: 241514
2015-07-07 06:35:19 +08:00
{ ISD::SRA, MVT::v4i64, 4 }, // 2 x psrad + shuffle.
X86TTI: i16/i32 vector div with a constant (splat) divisor are reasonably cheap now. Turn vectorization back on. llvm-svn: 207320
2014-04-26 22:53:05 +08:00
{ ISD::SDIV, MVT::v16i16, 6 }, // vpmulhw sequence
{ ISD::UDIV, MVT::v16i16, 6 }, // vpmulhuw sequence
{ ISD::SDIV, MVT::v8i32, 15 }, // vpmuldq sequence
{ ISD::UDIV, MVT::v8i32, 15 }, // vpmuludq sequence
};
if (Op2Info == TargetTransformInfo::OK_UniformConstantValue &&
ST->hasAVX2()) {
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (const auto *Entry = CostTableLookup(AVX2UniformConstCostTable, ISD,
LT.second))
return LT.first * Entry->Cost;
X86TTI: i16/i32 vector div with a constant (splat) divisor are reasonably cheap now. Turn vectorization back on. llvm-svn: 207320
2014-04-26 22:53:05 +08:00
}
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
static const CostTblEntry SSE2UniformConstCostTable[] = {
[X86][AVX1] Account for cost of extract/insert of 256-bit SDIV/UDIV by mul sequences llvm-svn: 303017
2017-05-15 02:52:15 +08:00
{ ISD::SHL, MVT::v16i8, 2 }, // psllw + pand.
{ ISD::SRL, MVT::v16i8, 2 }, // psrlw + pand.
{ ISD::SRA, MVT::v16i8, 4 }, // psrlw, pand, pxor, psubb.
{ ISD::SHL, MVT::v32i8, 4+2 }, // 2*(psllw + pand) + split.
{ ISD::SRL, MVT::v32i8, 4+2 }, // 2*(psrlw + pand) + split.
{ ISD::SRA, MVT::v32i8, 8+2 }, // 2*(psrlw, pand, pxor, psubb) + split.
{ ISD::SDIV, MVT::v16i16, 12+2 }, // 2*pmulhw sequence + split.
{ ISD::SDIV, MVT::v8i16, 6 }, // pmulhw sequence
{ ISD::UDIV, MVT::v16i16, 12+2 }, // 2*pmulhuw sequence + split.
{ ISD::UDIV, MVT::v8i16, 6 }, // pmulhuw sequence
{ ISD::SDIV, MVT::v8i32, 38+2 }, // 2*pmuludq sequence + split.
{ ISD::SDIV, MVT::v4i32, 19 }, // pmuludq sequence
{ ISD::UDIV, MVT::v8i32, 30+2 }, // 2*pmuludq sequence + split.
{ ISD::UDIV, MVT::v4i32, 15 }, // pmuludq sequence
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
};
if (Op2Info == TargetTransformInfo::OK_UniformConstantValue &&
ST->hasSSE2()) {
// pmuldq sequence.
if (ISD == ISD::SDIV && LT.second == MVT::v8i32 && ST->hasAVX())
[X86][AVX1] Account for cost of extract/insert of 256-bit SDIV/UDIV by mul sequences llvm-svn: 303017
2017-05-15 02:52:15 +08:00
return LT.first * 32;
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
if (ISD == ISD::SDIV && LT.second == MVT::v4i32 && ST->hasSSE41())
return LT.first * 15;
[X86][XOP] XOP's general v16i8 shifts will be used instead of v8i16 shift + mask. Tweak cost model to match what lowering actually does. llvm-svn: 303013
2017-05-15 01:59:46 +08:00
// XOP has faster vXi8 shifts.
if ((ISD != ISD::SHL && ISD != ISD::SRL && ISD != ISD::SRA) ||
!ST->hasXOP())
if (const auto *Entry =
CostTableLookup(SSE2UniformConstCostTable, ISD, LT.second))
return LT.first * Entry->Cost;
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv uniformconst costs for 256/512 bit integer vectors We weren't checking for uniform const costs before the general cost, resulting in very high estimates. llvm-svn: 284755
2016-10-21 02:00:35 +08:00
}
[CostModel][X86] Moved legal uniform shift costs earlier. XOP was prematurely matching, doubling the cost of ashr/lshr uniform shifts. llvm-svn: 291390
2017-01-08 21:12:03 +08:00
static const CostTblEntry AVX2UniformCostTable[] = {
// Uniform splats are cheaper for the following instructions.
{ ISD::SHL, MVT::v16i16, 1 }, // psllw.
{ ISD::SRL, MVT::v16i16, 1 }, // psrlw.
{ ISD::SRA, MVT::v16i16, 1 }, // psraw.
};
if (ST->hasAVX2() &&
((Op2Info == TargetTransformInfo::OK_UniformConstantValue) ||
(Op2Info == TargetTransformInfo::OK_UniformValue))) {
if (const auto *Entry =
CostTableLookup(AVX2UniformCostTable, ISD, LT.second))
return LT.first * Entry->Cost;
}
static const CostTblEntry SSE2UniformCostTable[] = {
// Uniform splats are cheaper for the following instructions.
{ ISD::SHL, MVT::v8i16, 1 }, // psllw.
{ ISD::SHL, MVT::v4i32, 1 }, // pslld
{ ISD::SHL, MVT::v2i64, 1 }, // psllq.
{ ISD::SRL, MVT::v8i16, 1 }, // psrlw.
{ ISD::SRL, MVT::v4i32, 1 }, // psrld.
{ ISD::SRL, MVT::v2i64, 1 }, // psrlq.
{ ISD::SRA, MVT::v8i16, 1 }, // psraw.
{ ISD::SRA, MVT::v4i32, 1 }, // psrad.
};
if (ST->hasSSE2() &&
((Op2Info == TargetTransformInfo::OK_UniformConstantValue) ||
(Op2Info == TargetTransformInfo::OK_UniformValue))) {
if (const auto *Entry =
CostTableLookup(SSE2UniformCostTable, ISD, LT.second))
return LT.first * Entry->Cost;
}
[X86][AVX512DQ] Improve lowering of MUL v2i64 and v4i64 With DQI but without VLX, lower v2i64 and v4i64 MUL operations with v8i64 MUL (vpmullq). Updated cost table accordingly. Differential Revision: https://reviews.llvm.org/D26011 llvm-svn: 285304
2016-10-27 23:27:00 +08:00
static const CostTblEntry AVX512DQCostTable[] = {
{ ISD::MUL, MVT::v2i64, 1 },
{ ISD::MUL, MVT::v4i64, 1 },
{ ISD::MUL, MVT::v8i64, 1 }
};
// Look for AVX512DQ lowering tricks for custom cases.
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (ST->hasDQI())
if (const auto *Entry = CostTableLookup(AVX512DQCostTable, ISD, LT.second))
[X86][AVX512DQ] Improve lowering of MUL v2i64 and v4i64 With DQI but without VLX, lower v2i64 and v4i64 MUL operations with v8i64 MUL (vpmullq). Updated cost table accordingly. Differential Revision: https://reviews.llvm.org/D26011 llvm-svn: 285304
2016-10-27 23:27:00 +08:00
return LT.first * Entry->Cost;
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv general costs for 256/512 bit integer vectors We weren't accounting for legal types on every subtarget, meaning that many of the costs were using defaults. We still don't correctly cost (or test) the 512-bit sdiv/udiv by uniform const cases, nor the power-of-2 cases. llvm-svn: 284744
2016-10-21 00:39:11 +08:00
static const CostTblEntry AVX512BWCostTable[] = {
[CostModel][X86] Fix AVX512BW vector shift costs for vXi16 types We already have patterns in place to support 128/256-bit shifts without AVX512VL llvm-svn: 292077
2017-01-16 04:44:00 +08:00
{ ISD::SHL, MVT::v8i16, 1 }, // vpsllvw
{ ISD::SRL, MVT::v8i16, 1 }, // vpsrlvw
{ ISD::SRA, MVT::v8i16, 1 }, // vpsravw
{ ISD::SHL, MVT::v16i16, 1 }, // vpsllvw
{ ISD::SRL, MVT::v16i16, 1 }, // vpsrlvw
{ ISD::SRA, MVT::v16i16, 1 }, // vpsravw
[CostModel][AVX512BW] Add v32i16 vector shift costs for avx512bw targets. llvm-svn: 291354
2017-01-08 01:54:10 +08:00
{ ISD::SHL, MVT::v32i16, 1 }, // vpsllvw
{ ISD::SRL, MVT::v32i16, 1 }, // vpsrlvw
{ ISD::SRA, MVT::v32i16, 1 }, // vpsravw
[X86][AVX512BW] Vectorize v64i8 vector shifts Differential Revision: https://reviews.llvm.org/D28447 llvm-svn: 291665
2017-01-11 18:36:51 +08:00
{ ISD::SHL, MVT::v64i8, 11 }, // vpblendvb sequence.
{ ISD::SRL, MVT::v64i8, 11 }, // vpblendvb sequence.
{ ISD::SRA, MVT::v64i8, 24 }, // vpblendvb sequence.
[CostModel][X86] Added mul costs for vXi8 vectors More realistic v16i8/v32i8/v64i8 MUL costs - we have to extend to vXi16, use PMULLW and then truncate the result llvm-svn: 286838
2016-11-14 23:54:24 +08:00
{ ISD::MUL, MVT::v64i8, 11 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v32i8, 4 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v16i8, 4 }, // extend/pmullw/trunc sequence.
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv general costs for 256/512 bit integer vectors We weren't accounting for legal types on every subtarget, meaning that many of the costs were using defaults. We still don't correctly cost (or test) the 512-bit sdiv/udiv by uniform const cases, nor the power-of-2 cases. llvm-svn: 284744
2016-10-21 00:39:11 +08:00
// Vectorizing division is a bad idea. See the SSE2 table for more comments.
{ ISD::SDIV, MVT::v64i8, 64*20 },
{ ISD::SDIV, MVT::v32i16, 32*20 },
{ ISD::UDIV, MVT::v64i8, 64*20 },
[CostModel][X86] Fix 512-bit SDIV/UDIV 'big' costs. Set the costs on the lowest target that supports the type. llvm-svn: 291229
2017-01-06 19:12:53 +08:00
{ ISD::UDIV, MVT::v32i16, 32*20 }
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv general costs for 256/512 bit integer vectors We weren't accounting for legal types on every subtarget, meaning that many of the costs were using defaults. We still don't correctly cost (or test) the 512-bit sdiv/udiv by uniform const cases, nor the power-of-2 cases. llvm-svn: 284744
2016-10-21 00:39:11 +08:00
};
// Look for AVX512BW lowering tricks for custom cases.
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (ST->hasBWI())
if (const auto *Entry = CostTableLookup(AVX512BWCostTable, ISD, LT.second))
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv general costs for 256/512 bit integer vectors We weren't accounting for legal types on every subtarget, meaning that many of the costs were using defaults. We still don't correctly cost (or test) the 512-bit sdiv/udiv by uniform const cases, nor the power-of-2 cases. llvm-svn: 284744
2016-10-21 00:39:11 +08:00
return LT.first * Entry->Cost;
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX512CostTable[] = {
[CostModel][X86] Fix 512-bit SDIV/UDIV 'big' costs. Set the costs on the lowest target that supports the type. llvm-svn: 291229
2017-01-06 19:12:53 +08:00
{ ISD::SHL, MVT::v16i32, 1 },
{ ISD::SRL, MVT::v16i32, 1 },
{ ISD::SRA, MVT::v16i32, 1 },
[CostModel][X86] Updated vXi64 ASHR costs on AVX512 targets now that D28604 has landed llvm-svn: 292023
2017-01-15 03:24:23 +08:00
[CostModel][X86] Fix 512-bit SDIV/UDIV 'big' costs. Set the costs on the lowest target that supports the type. llvm-svn: 291229
2017-01-06 19:12:53 +08:00
{ ISD::SHL, MVT::v8i64, 1 },
{ ISD::SRL, MVT::v8i64, 1 },
[CostModel][X86] Updated vXi64 ASHR costs on AVX512 targets now that D28604 has landed llvm-svn: 292023
2017-01-15 03:24:23 +08:00
{ ISD::SRA, MVT::v2i64, 1 },
{ ISD::SRA, MVT::v4i64, 1 },
[CostModel][X86] Fix 512-bit SDIV/UDIV 'big' costs. Set the costs on the lowest target that supports the type. llvm-svn: 291229
2017-01-06 19:12:53 +08:00
{ ISD::SRA, MVT::v8i64, 1 },
{ ISD::MUL, MVT::v32i8, 13 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v16i8, 5 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v16i32, 1 }, // pmulld
{ ISD::MUL, MVT::v8i64, 8 }, // 3*pmuludq/3*shift/2*add
// Vectorizing division is a bad idea. See the SSE2 table for more comments.
{ ISD::SDIV, MVT::v16i32, 16*20 },
{ ISD::SDIV, MVT::v8i64, 8*20 },
{ ISD::UDIV, MVT::v16i32, 16*20 },
{ ISD::UDIV, MVT::v8i64, 8*20 }
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
};
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (ST->hasAVX512())
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (const auto *Entry = CostTableLookup(AVX512CostTable, ISD, LT.second))
return LT.first * Entry->Cost;
[X86][XOP] Added support for the lowering of 128-bit vector shifts to XOP shift instructions The XOP shifts just have logical/arithmetic versions and the left/right shifts are controlled by whether the value is positive/negative. Because of this I've added new X86ISD nodes instead of trying to force them to use the existing shift nodes. Additionally Excavator cores (bdver4) support XOP and AVX2 - meaning that it should use the AVX2 shifts when it can and fall back to XOP in other cases. Differential Revision: http://reviews.llvm.org/D8690 llvm-svn: 248878
2015-09-30 16:17:50 +08:00
[CostModel][X86] Match 256-bit vector shift 'splat' costs for AVX2 and above We were matching against general vector shift costs before the uniform splat costs llvm-svn: 291365
2017-01-08 05:47:10 +08:00
static const CostTblEntry AVX2ShiftCostTable[] = {
Correct cost model for vector shift on AVX2 - After moving logic recognizing vector shift with scalar amount from DAG combining into DAG lowering, we declare to customize all vector shifts even vector shift on AVX is legal. As a result, the cost model needs special tuning to identify these legal cases. llvm-svn: 177586
2013-03-21 06:01:10 +08:00
// Shifts on v4i64/v8i32 on AVX2 is legal even though we declare to
// customize them to detect the cases where shift amount is a scalar one.
{ ISD::SHL, MVT::v4i32, 1 },
{ ISD::SRL, MVT::v4i32, 1 },
{ ISD::SRA, MVT::v4i32, 1 },
{ ISD::SHL, MVT::v8i32, 1 },
{ ISD::SRL, MVT::v8i32, 1 },
{ ISD::SRA, MVT::v8i32, 1 },
{ ISD::SHL, MVT::v2i64, 1 },
{ ISD::SRL, MVT::v2i64, 1 },
{ ISD::SHL, MVT::v4i64, 1 },
{ ISD::SRL, MVT::v4i64, 1 },
[X86][XOP] Added support for the lowering of 128-bit vector shifts to XOP shift instructions The XOP shifts just have logical/arithmetic versions and the left/right shifts are controlled by whether the value is positive/negative. Because of this I've added new X86ISD nodes instead of trying to force them to use the existing shift nodes. Additionally Excavator cores (bdver4) support XOP and AVX2 - meaning that it should use the AVX2 shifts when it can and fall back to XOP in other cases. Differential Revision: http://reviews.llvm.org/D8690 llvm-svn: 248878
2015-09-30 16:17:50 +08:00
};
// Look for AVX2 lowering tricks.
if (ST->hasAVX2()) {
if (ISD == ISD::SHL && LT.second == MVT::v16i16 &&
(Op2Info == TargetTransformInfo::OK_UniformConstantValue ||
Op2Info == TargetTransformInfo::OK_NonUniformConstantValue))
// On AVX2, a packed v16i16 shift left by a constant build_vector
// is lowered into a vector multiply (vpmullw).
return LT.first;
X86 cost model: Vector shifts are expensive in most cases The default logic does not correctly identify costs of casts because they are marked as custom on x86. For some cases, where the shift amount is a scalar we would be able to generate better code. Unfortunately, when this is the case the value (the splat) will get hoisted out of the loop, thereby making it invisible to ISel. radar://13130673 radar://13537826 llvm-svn: 178703
2013-04-04 05:46:05 +08:00
[CostModel][X86] Match 256-bit vector shift 'splat' costs for AVX2 and above We were matching against general vector shift costs before the uniform splat costs llvm-svn: 291365
2017-01-08 05:47:10 +08:00
if (const auto *Entry = CostTableLookup(AVX2ShiftCostTable, ISD, LT.second))
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
return LT.first * Entry->Cost;
[X86][XOP] Added support for the lowering of 128-bit vector shifts to XOP shift instructions The XOP shifts just have logical/arithmetic versions and the left/right shifts are controlled by whether the value is positive/negative. Because of this I've added new X86ISD nodes instead of trying to force them to use the existing shift nodes. Additionally Excavator cores (bdver4) support XOP and AVX2 - meaning that it should use the AVX2 shifts when it can and fall back to XOP in other cases. Differential Revision: http://reviews.llvm.org/D8690 llvm-svn: 248878
2015-09-30 16:17:50 +08:00
}
[CostModel][X86] Match 256-bit vector shift 'splat' costs for AVX2 and above We were matching against general vector shift costs before the uniform splat costs llvm-svn: 291365
2017-01-08 05:47:10 +08:00
static const CostTblEntry XOPShiftCostTable[] = {
[X86][XOP] Added support for the lowering of 128-bit vector shifts to XOP shift instructions The XOP shifts just have logical/arithmetic versions and the left/right shifts are controlled by whether the value is positive/negative. Because of this I've added new X86ISD nodes instead of trying to force them to use the existing shift nodes. Additionally Excavator cores (bdver4) support XOP and AVX2 - meaning that it should use the AVX2 shifts when it can and fall back to XOP in other cases. Differential Revision: http://reviews.llvm.org/D8690 llvm-svn: 248878
2015-09-30 16:17:50 +08:00
// 128bit shifts take 1cy, but right shifts require negation beforehand.
{ ISD::SHL, MVT::v16i8, 1 },
{ ISD::SRL, MVT::v16i8, 2 },
{ ISD::SRA, MVT::v16i8, 2 },
{ ISD::SHL, MVT::v8i16, 1 },
{ ISD::SRL, MVT::v8i16, 2 },
{ ISD::SRA, MVT::v8i16, 2 },
{ ISD::SHL, MVT::v4i32, 1 },
{ ISD::SRL, MVT::v4i32, 2 },
{ ISD::SRA, MVT::v4i32, 2 },
{ ISD::SHL, MVT::v2i64, 1 },
{ ISD::SRL, MVT::v2i64, 2 },
{ ISD::SRA, MVT::v2i64, 2 },
// 256bit shifts require splitting if AVX2 didn't catch them above.
[X86][XOP] Account for cost of extract/insert of 256-bit vector shifts llvm-svn: 303010
2017-05-14 21:38:53 +08:00
{ ISD::SHL, MVT::v32i8, 2+2 },
{ ISD::SRL, MVT::v32i8, 4+2 },
{ ISD::SRA, MVT::v32i8, 4+2 },
{ ISD::SHL, MVT::v16i16, 2+2 },
{ ISD::SRL, MVT::v16i16, 4+2 },
{ ISD::SRA, MVT::v16i16, 4+2 },
{ ISD::SHL, MVT::v8i32, 2+2 },
{ ISD::SRL, MVT::v8i32, 4+2 },
{ ISD::SRA, MVT::v8i32, 4+2 },
{ ISD::SHL, MVT::v4i64, 2+2 },
{ ISD::SRL, MVT::v4i64, 4+2 },
{ ISD::SRA, MVT::v4i64, 4+2 },
[X86][XOP] Added support for the lowering of 128-bit vector shifts to XOP shift instructions The XOP shifts just have logical/arithmetic versions and the left/right shifts are controlled by whether the value is positive/negative. Because of this I've added new X86ISD nodes instead of trying to force them to use the existing shift nodes. Additionally Excavator cores (bdver4) support XOP and AVX2 - meaning that it should use the AVX2 shifts when it can and fall back to XOP in other cases. Differential Revision: http://reviews.llvm.org/D8690 llvm-svn: 248878
2015-09-30 16:17:50 +08:00
};
// Look for XOP lowering tricks.
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (ST->hasXOP())
[CostModel][X86] Match 256-bit vector shift 'splat' costs for AVX2 and above We were matching against general vector shift costs before the uniform splat costs llvm-svn: 291365
2017-01-08 05:47:10 +08:00
if (const auto *Entry = CostTableLookup(XOPShiftCostTable, ISD, LT.second))
[CostModel][X86] Fixed AVX1/AVX512 sdiv/udiv general costs for 256/512 bit integer vectors We weren't accounting for legal types on every subtarget, meaning that many of the costs were using defaults. We still don't correctly cost (or test) the 512-bit sdiv/udiv by uniform const cases, nor the power-of-2 cases. llvm-svn: 284744
2016-10-21 00:39:11 +08:00
return LT.first * Entry->Cost;
[CostModel][X86] Moved legal uniform shift costs earlier. XOP was prematurely matching, doubling the cost of ashr/lshr uniform shifts. llvm-svn: 291390
2017-01-08 21:12:03 +08:00
static const CostTblEntry SSE2UniformShiftCostTable[] = {
[LV, X86] Be more optimistic about vectorizing shifts. Shifts with a uniform but non-constant count were considered very expensive to vectorize, because the splat of the uniform count and the shift would tend to appear in different blocks. That made the splat invisible to ISel, and we'd scalarize the shift at codegen time. Since r201655, CodeGenPrepare sinks those splats to be next to their use, and we are able to select the appropriate vector shifts. This updates the cost model to to take this into account by making shifts by a uniform cheap again. Differential Revision: https://reviews.llvm.org/D23049 llvm-svn: 277782
2016-08-05 06:48:03 +08:00
// Uniform splats are cheaper for the following instructions.
[X86][AVX1] Account for cost of extract/insert of 256-bit shifts by splat llvm-svn: 303021
2017-05-15 04:02:34 +08:00
{ ISD::SHL, MVT::v16i16, 2+2 }, // 2*psllw + split.
{ ISD::SHL, MVT::v8i32, 2+2 }, // 2*pslld + split.
{ ISD::SHL, MVT::v4i64, 2+2 }, // 2*psllq + split.
{ ISD::SRL, MVT::v16i16, 2+2 }, // 2*psrlw + split.
{ ISD::SRL, MVT::v8i32, 2+2 }, // 2*psrld + split.
{ ISD::SRL, MVT::v4i64, 2+2 }, // 2*psrlq + split.
{ ISD::SRA, MVT::v16i16, 2+2 }, // 2*psraw + split.
{ ISD::SRA, MVT::v8i32, 2+2 }, // 2*psrad + split.
{ ISD::SRA, MVT::v2i64, 4 }, // 2*psrad + shuffle.
{ ISD::SRA, MVT::v4i64, 8+2 }, // 2*(2*psrad + shuffle) + split.
X86 cost model: Differentiate cost for vector shifts of constants SSE2 has efficient support for shifts by a scalar. My previous change of making shifts expensive did not take this into account marking all shifts as expensive. This would prevent vectorization from happening where it is actually beneficial. With this change we differentiate between shifts of constants and other shifts. radar://13576547 llvm-svn: 178808
2013-04-05 07:26:24 +08:00
};
[LV, X86] Be more optimistic about vectorizing shifts. Shifts with a uniform but non-constant count were considered very expensive to vectorize, because the splat of the uniform count and the shift would tend to appear in different blocks. That made the splat invisible to ISel, and we'd scalarize the shift at codegen time. Since r201655, CodeGenPrepare sinks those splats to be next to their use, and we are able to select the appropriate vector shifts. This updates the cost model to to take this into account by making shifts by a uniform cheap again. Differential Revision: https://reviews.llvm.org/D23049 llvm-svn: 277782
2016-08-05 06:48:03 +08:00
if (ST->hasSSE2() &&
((Op2Info == TargetTransformInfo::OK_UniformConstantValue) ||
(Op2Info == TargetTransformInfo::OK_UniformValue))) {
[X86][AVX2] Fix costs for v4i64 ashr by splat llvm-svn: 303022
2017-05-15 04:25:42 +08:00
// Handle AVX2 uniform v4i64 ISD::SRA, it's not worth a table.
if (ISD == ISD::SRA && LT.second == MVT::v4i64 && ST->hasAVX2())
return LT.first * 4; // 2*psrad + shuffle.
[LV, X86] Be more optimistic about vectorizing shifts. Shifts with a uniform but non-constant count were considered very expensive to vectorize, because the splat of the uniform count and the shift would tend to appear in different blocks. That made the splat invisible to ISel, and we'd scalarize the shift at codegen time. Since r201655, CodeGenPrepare sinks those splats to be next to their use, and we are able to select the appropriate vector shifts. This updates the cost model to to take this into account by making shifts by a uniform cheap again. Differential Revision: https://reviews.llvm.org/D23049 llvm-svn: 277782
2016-08-05 06:48:03 +08:00
if (const auto *Entry =
[CostModel][X86] Moved legal uniform shift costs earlier. XOP was prematurely matching, doubling the cost of ashr/lshr uniform shifts. llvm-svn: 291390
2017-01-08 21:12:03 +08:00
CostTableLookup(SSE2UniformShiftCostTable, ISD, LT.second))
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
return LT.first * Entry->Cost;
X86 cost model: Differentiate cost for vector shifts of constants SSE2 has efficient support for shifts by a scalar. My previous change of making shifts expensive did not take this into account marking all shifts as expensive. This would prevent vectorization from happening where it is actually beneficial. With this change we differentiate between shifts of constants and other shifts. radar://13576547 llvm-svn: 178808
2013-04-05 07:26:24 +08:00
}
[Vectorizer] Add a new 'OperandValueKind' in TargetTransformInfo called 'OK_NonUniformConstValue' to identify operands which are constants but not constant splats. The cost model now allows returning 'OK_NonUniformConstValue' for non splat operands that are instances of ConstantVector or ConstantDataVector. With this change, targets are now able to compute different costs for instructions with non-uniform constant operands. For example, On X86 the cost of a vector shift may vary depending on whether the second operand is a uniform or non-uniform constant. This patch applies the following changes: - The cost model computation now takes into account non-uniform constants; - The cost of vector shift instructions has been improved in X86TargetTransformInfo analysis pass; - BBVectorize, SLPVectorizer and LoopVectorize now know how to distinguish between non-uniform and uniform constant operands. Added a new test to verify that the output of opt '-cost-model -analyze' is valid in the following configurations: SSE2, SSE4.1, AVX, AVX2. llvm-svn: 201272
2014-02-13 07:43:47 +08:00
if (ISD == ISD::SHL &&
Op2Info == TargetTransformInfo::OK_NonUniformConstantValue) {
Remove two unnecessary conversions from MVT to EVT. NFC llvm-svn: 251219
2015-10-25 11:15:29 +08:00
MVT VT = LT.second;
[CostModel] Fixed AVX integer shift costs Targets with AVX but without AVX2 were incorrectly reporting costs of 256-bit integer shifts. llvm-svn: 250611
2015-10-17 21:23:38 +08:00
// Vector shift left by non uniform constant can be lowered
[CostModel][X86] Generalized cost calculation of SHL by constant -> MUL conversion. llvm-svn: 291364
2017-01-08 05:33:00 +08:00
// into vector multiply.
if (((VT == MVT::v8i16 || VT == MVT::v4i32) && ST->hasSSE2()) ||
((VT == MVT::v16i16 || VT == MVT::v8i32) && ST->hasAVX()))
[Vectorizer] Add a new 'OperandValueKind' in TargetTransformInfo called 'OK_NonUniformConstValue' to identify operands which are constants but not constant splats. The cost model now allows returning 'OK_NonUniformConstValue' for non splat operands that are instances of ConstantVector or ConstantDataVector. With this change, targets are now able to compute different costs for instructions with non-uniform constant operands. For example, On X86 the cost of a vector shift may vary depending on whether the second operand is a uniform or non-uniform constant. This patch applies the following changes: - The cost model computation now takes into account non-uniform constants; - The cost of vector shift instructions has been improved in X86TargetTransformInfo analysis pass; - BBVectorize, SLPVectorizer and LoopVectorize now know how to distinguish between non-uniform and uniform constant operands. Added a new test to verify that the output of opt '-cost-model -analyze' is valid in the following configurations: SSE2, SSE4.1, AVX, AVX2. llvm-svn: 201272
2014-02-13 07:43:47 +08:00
ISD = ISD::MUL;
}
X86 cost model: Differentiate cost for vector shifts of constants SSE2 has efficient support for shifts by a scalar. My previous change of making shifts expensive did not take this into account marking all shifts as expensive. This would prevent vectorization from happening where it is actually beneficial. With this change we differentiate between shifts of constants and other shifts. radar://13576547 llvm-svn: 178808
2013-04-05 07:26:24 +08:00
[CostModel][X86] Match 256-bit vector shift 'splat' costs for AVX2 and above We were matching against general vector shift costs before the uniform splat costs llvm-svn: 291365
2017-01-08 05:47:10 +08:00
static const CostTblEntry AVX2CostTable[] = {
{ ISD::SHL, MVT::v32i8, 11 }, // vpblendvb sequence.
{ ISD::SHL, MVT::v16i16, 10 }, // extend/vpsrlvd/pack sequence.
{ ISD::SRL, MVT::v32i8, 11 }, // vpblendvb sequence.
{ ISD::SRL, MVT::v16i16, 10 }, // extend/vpsrlvd/pack sequence.
{ ISD::SRA, MVT::v32i8, 24 }, // vpblendvb sequence.
{ ISD::SRA, MVT::v16i16, 10 }, // extend/vpsravd/pack sequence.
{ ISD::SRA, MVT::v2i64, 4 }, // srl/xor/sub sequence.
{ ISD::SRA, MVT::v4i64, 4 }, // srl/xor/sub sequence.
{ ISD::SUB, MVT::v32i8, 1 }, // psubb
{ ISD::ADD, MVT::v32i8, 1 }, // paddb
{ ISD::SUB, MVT::v16i16, 1 }, // psubw
{ ISD::ADD, MVT::v16i16, 1 }, // paddw
{ ISD::SUB, MVT::v8i32, 1 }, // psubd
{ ISD::ADD, MVT::v8i32, 1 }, // paddd
{ ISD::SUB, MVT::v4i64, 1 }, // psubq
{ ISD::ADD, MVT::v4i64, 1 }, // paddq
{ ISD::MUL, MVT::v32i8, 17 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v16i8, 7 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v16i16, 1 }, // pmullw
{ ISD::MUL, MVT::v8i32, 1 }, // pmulld
{ ISD::MUL, MVT::v4i64, 8 }, // 3*pmuludq/3*shift/2*add
{ ISD::FDIV, MVT::f32, 7 }, // Haswell from http://www.agner.org/
{ ISD::FDIV, MVT::v4f32, 7 }, // Haswell from http://www.agner.org/
{ ISD::FDIV, MVT::v8f32, 14 }, // Haswell from http://www.agner.org/
{ ISD::FDIV, MVT::f64, 14 }, // Haswell from http://www.agner.org/
{ ISD::FDIV, MVT::v2f64, 14 }, // Haswell from http://www.agner.org/
{ ISD::FDIV, MVT::v4f64, 28 }, // Haswell from http://www.agner.org/
};
// Look for AVX2 lowering tricks for custom cases.
if (ST->hasAVX2())
if (const auto *Entry = CostTableLookup(AVX2CostTable, ISD, LT.second))
return LT.first * Entry->Cost;
[CostModel][X86] Reordered AVX1 arithmetic cost LUT into descending target order. NFCI. llvm-svn: 291352
2017-01-08 01:03:51 +08:00
static const CostTblEntry AVX1CostTable[] = {
// We don't have to scalarize unsupported ops. We can issue two half-sized
// operations and we only need to extract the upper YMM half.
// Two ops + 1 extract + 1 insert = 4.
[CostModel][X86] Merge separate AVX1 cost LUTs. NFCI. llvm-svn: 291355
2017-01-08 02:19:25 +08:00
{ ISD::MUL, MVT::v16i16, 4 },
{ ISD::MUL, MVT::v8i32, 4 },
{ ISD::SUB, MVT::v32i8, 4 },
{ ISD::ADD, MVT::v32i8, 4 },
{ ISD::SUB, MVT::v16i16, 4 },
{ ISD::ADD, MVT::v16i16, 4 },
{ ISD::SUB, MVT::v8i32, 4 },
{ ISD::ADD, MVT::v8i32, 4 },
{ ISD::SUB, MVT::v4i64, 4 },
{ ISD::ADD, MVT::v4i64, 4 },
[CostModel][X86] Reordered AVX1 arithmetic cost LUT into descending target order. NFCI. llvm-svn: 291352
2017-01-08 01:03:51 +08:00
// A v4i64 multiply is custom lowered as two split v2i64 vectors that then
// are lowered as a series of long multiplies(3), shifts(3) and adds(2)
// Because we believe v4i64 to be a legal type, we must also include the
// extract+insert in the cost table. Therefore, the cost here is 18
// instead of 8.
[CostModel][X86] Merge separate AVX1 cost LUTs. NFCI. llvm-svn: 291355
2017-01-08 02:19:25 +08:00
{ ISD::MUL, MVT::v4i64, 18 },
{ ISD::MUL, MVT::v32i8, 26 }, // extend/pmullw/trunc sequence.
{ ISD::FDIV, MVT::f32, 14 }, // SNB from http://www.agner.org/
{ ISD::FDIV, MVT::v4f32, 14 }, // SNB from http://www.agner.org/
{ ISD::FDIV, MVT::v8f32, 28 }, // SNB from http://www.agner.org/
{ ISD::FDIV, MVT::f64, 22 }, // SNB from http://www.agner.org/
{ ISD::FDIV, MVT::v2f64, 22 }, // SNB from http://www.agner.org/
{ ISD::FDIV, MVT::v4f64, 44 }, // SNB from http://www.agner.org/
// Vectorizing division is a bad idea. See the SSE2 table for more comments.
{ ISD::SDIV, MVT::v32i8, 32*20 },
{ ISD::SDIV, MVT::v16i16, 16*20 },
{ ISD::SDIV, MVT::v8i32, 8*20 },
{ ISD::SDIV, MVT::v4i64, 4*20 },
{ ISD::UDIV, MVT::v32i8, 32*20 },
{ ISD::UDIV, MVT::v16i16, 16*20 },
{ ISD::UDIV, MVT::v8i32, 8*20 },
{ ISD::UDIV, MVT::v4i64, 4*20 },
[CostModel][X86] Reordered AVX1 arithmetic cost LUT into descending target order. NFCI. llvm-svn: 291352
2017-01-08 01:03:51 +08:00
};
[CostModel][X86] Added missing AVX2 arithmetic costs. Allows us to correctly fall through to the lower AVX1 costs if look up failed. llvm-svn: 291353
2017-01-08 01:27:39 +08:00
if (ST->hasAVX())
[CostModel][X86] Reordered AVX1 arithmetic cost LUT into descending target order. NFCI. llvm-svn: 291352
2017-01-08 01:03:51 +08:00
if (const auto *Entry = CostTableLookup(AVX1CostTable, ISD, LT.second))
return LT.first * Entry->Cost;
[CostModel][X86] Reordered SSE42 arithmetic cost LUT into descending order. NFCI. llvm-svn: 291162
2017-01-06 03:19:39 +08:00
static const CostTblEntry SSE42CostTable[] = {
{ ISD::FDIV, MVT::f32, 14 }, // Nehalem from http://www.agner.org/
{ ISD::FDIV, MVT::v4f32, 14 }, // Nehalem from http://www.agner.org/
{ ISD::FDIV, MVT::f64, 22 }, // Nehalem from http://www.agner.org/
{ ISD::FDIV, MVT::v2f64, 22 }, // Nehalem from http://www.agner.org/
};
if (ST->hasSSE42())
if (const auto *Entry = CostTableLookup(SSE42CostTable, ISD, LT.second))
return LT.first * Entry->Cost;
[X86][SSE] Add SSE41/AVX1 costs for vector shifts. We were defaulting to SSE2 costs which weren't taking into account the availability of PBLENDW/PBLENDVB to improve merging of per-element shift results. llvm-svn: 284939
2016-10-24 00:49:04 +08:00
static const CostTblEntry SSE41CostTable[] = {
[X86][AVX1] Account for cost of extract/insert of 256-bit shifts llvm-svn: 303023
2017-05-15 04:52:11 +08:00
{ ISD::SHL, MVT::v16i8, 11 }, // pblendvb sequence.
{ ISD::SHL, MVT::v32i8, 2*11+2 }, // pblendvb sequence + split.
{ ISD::SHL, MVT::v8i16, 14 }, // pblendvb sequence.
{ ISD::SHL, MVT::v16i16, 2*14+2 }, // pblendvb sequence + split.
{ ISD::SHL, MVT::v4i32, 4 }, // pslld/paddd/cvttps2dq/pmulld
{ ISD::SHL, MVT::v8i32, 2*4+2 }, // pslld/paddd/cvttps2dq/pmulld + split
{ ISD::SRL, MVT::v16i8, 12 }, // pblendvb sequence.
{ ISD::SRL, MVT::v32i8, 2*12+2 }, // pblendvb sequence + split.
{ ISD::SRL, MVT::v8i16, 14 }, // pblendvb sequence.
{ ISD::SRL, MVT::v16i16, 2*14+2 }, // pblendvb sequence + split.
{ ISD::SRL, MVT::v4i32, 11 }, // Shift each lane + blend.
{ ISD::SRL, MVT::v8i32, 2*11+2 }, // Shift each lane + blend + split.
{ ISD::SRA, MVT::v16i8, 24 }, // pblendvb sequence.
{ ISD::SRA, MVT::v32i8, 2*24+2 }, // pblendvb sequence + split.
{ ISD::SRA, MVT::v8i16, 14 }, // pblendvb sequence.
{ ISD::SRA, MVT::v16i16, 2*14+2 }, // pblendvb sequence + split.
{ ISD::SRA, MVT::v4i32, 12 }, // Shift each lane + blend.
{ ISD::SRA, MVT::v8i32, 2*12+2 }, // Shift each lane + blend + split.
{ ISD::MUL, MVT::v4i32, 1 } // pmulld
[X86][SSE] Add SSE41/AVX1 costs for vector shifts. We were defaulting to SSE2 costs which weren't taking into account the availability of PBLENDW/PBLENDVB to improve merging of per-element shift results. llvm-svn: 284939
2016-10-24 00:49:04 +08:00
};
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (ST->hasSSE41())
[X86][SSE] Add SSE41/AVX1 costs for vector shifts. We were defaulting to SSE2 costs which weren't taking into account the availability of PBLENDW/PBLENDVB to improve merging of per-element shift results. llvm-svn: 284939
2016-10-24 00:49:04 +08:00
if (const auto *Entry = CostTableLookup(SSE41CostTable, ISD, LT.second))
return LT.first * Entry->Cost;
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry SSE2CostTable[] = {
X86 cost model: Vector shifts are expensive in most cases The default logic does not correctly identify costs of casts because they are marked as custom on x86. For some cases, where the shift amount is a scalar we would be able to generate better code. Unfortunately, when this is the case the value (the splat) will get hoisted out of the loop, thereby making it invisible to ISel. radar://13130673 radar://13537826 llvm-svn: 178703
2013-04-04 05:46:05 +08:00
// We don't correctly identify costs of casts because they are marked as
// custom.
[X86][AVX1] Account for cost of extract/insert of 256-bit shifts llvm-svn: 303023
2017-05-15 04:52:11 +08:00
{ ISD::SHL, MVT::v16i8, 26 }, // cmpgtb sequence.
{ ISD::SHL, MVT::v8i16, 32 }, // cmpgtb sequence.
{ ISD::SHL, MVT::v4i32, 2*5 }, // We optimized this using mul.
{ ISD::SHL, MVT::v2i64, 4 }, // splat+shuffle sequence.
{ ISD::SHL, MVT::v4i64, 2*4+2 }, // splat+shuffle sequence + split.
{ ISD::SRL, MVT::v16i8, 26 }, // cmpgtb sequence.
{ ISD::SRL, MVT::v8i16, 32 }, // cmpgtb sequence.
{ ISD::SRL, MVT::v4i32, 16 }, // Shift each lane + blend.
{ ISD::SRL, MVT::v2i64, 4 }, // splat+shuffle sequence.
{ ISD::SRL, MVT::v4i64, 2*4+2 }, // splat+shuffle sequence + split.
{ ISD::SRA, MVT::v16i8, 54 }, // unpacked cmpgtb sequence.
{ ISD::SRA, MVT::v8i16, 32 }, // cmpgtb sequence.
{ ISD::SRA, MVT::v4i32, 16 }, // Shift each lane + blend.
{ ISD::SRA, MVT::v2i64, 12 }, // srl/xor/sub sequence.
{ ISD::SRA, MVT::v4i64, 2*12+2 }, // srl/xor/sub sequence+split.
{ ISD::MUL, MVT::v16i8, 12 }, // extend/pmullw/trunc sequence.
{ ISD::MUL, MVT::v8i16, 1 }, // pmullw
{ ISD::MUL, MVT::v4i32, 6 }, // 3*pmuludq/4*shuffle
{ ISD::MUL, MVT::v2i64, 8 }, // 3*pmuludq/3*shift/2*add
{ ISD::FDIV, MVT::f32, 23 }, // Pentium IV from http://www.agner.org/
{ ISD::FDIV, MVT::v4f32, 39 }, // Pentium IV from http://www.agner.org/
{ ISD::FDIV, MVT::f64, 38 }, // Pentium IV from http://www.agner.org/
{ ISD::FDIV, MVT::v2f64, 69 }, // Pentium IV from http://www.agner.org/
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
Prune trailing whitespaces and CRs. llvm-svn: 242117
2015-07-14 12:03:49 +08:00
// It is not a good idea to vectorize division. We have to scalarize it and
X86 cost model: Vectorizing integer division is a bad idea radar://14057959 llvm-svn: 184872
2013-06-26 03:14:09 +08:00
// in the process we will often end up having to spilling regular
// registers. The overhead of division is going to dominate most kernels
// anyways so try hard to prevent vectorization of division - it is
// generally a bad idea. Assume somewhat arbitrarily that we have to be able
// to hide "20 cycles" for each lane.
{ ISD::SDIV, MVT::v16i8, 16*20 },
[CostModel][X86] Generalized cost calculation of SHL by constant -> MUL conversion. llvm-svn: 291364
2017-01-08 05:33:00 +08:00
{ ISD::SDIV, MVT::v8i16, 8*20 },
{ ISD::SDIV, MVT::v4i32, 4*20 },
{ ISD::SDIV, MVT::v2i64, 2*20 },
X86 cost model: Vectorizing integer division is a bad idea radar://14057959 llvm-svn: 184872
2013-06-26 03:14:09 +08:00
{ ISD::UDIV, MVT::v16i8, 16*20 },
[CostModel][X86] Generalized cost calculation of SHL by constant -> MUL conversion. llvm-svn: 291364
2017-01-08 05:33:00 +08:00
{ ISD::UDIV, MVT::v8i16, 8*20 },
{ ISD::UDIV, MVT::v4i32, 4*20 },
{ ISD::UDIV, MVT::v2i64, 2*20 },
X86 cost model: Vector shifts are expensive in most cases The default logic does not correctly identify costs of casts because they are marked as custom on x86. For some cases, where the shift amount is a scalar we would be able to generate better code. Unfortunately, when this is the case the value (the splat) will get hoisted out of the loop, thereby making it invisible to ISel. radar://13130673 radar://13537826 llvm-svn: 178703
2013-04-04 05:46:05 +08:00
};
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (ST->hasSSE2())
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (const auto *Entry = CostTableLookup(SSE2CostTable, ISD, LT.second))
return LT.first * Entry->Cost;
X86 cost model: Vector shifts are expensive in most cases The default logic does not correctly identify costs of casts because they are marked as custom on x86. For some cases, where the shift amount is a scalar we would be able to generate better code. Unfortunately, when this is the case the value (the splat) will get hoisted out of the loop, thereby making it invisible to ISel. radar://13130673 radar://13537826 llvm-svn: 178703
2013-04-04 05:46:05 +08:00
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
static const CostTblEntry SSE1CostTable[] = {
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
{ ISD::FDIV, MVT::f32, 17 }, // Pentium III from http://www.agner.org/
{ ISD::FDIV, MVT::v4f32, 34 }, // Pentium III from http://www.agner.org/
};
if (ST->hasSSE1())
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
if (const auto *Entry = CostTableLookup(SSE1CostTable, ISD, LT.second))
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
return LT.first * Entry->Cost;
[CostModel][X86] Tidyup arithmetic costs code. NFCI. Remove unnecessary braces, remove one use variables and keep LUTs to similar naming convention. llvm-svn: 291187
2017-01-06 06:48:02 +08:00
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
// Fallback to the default implementation.
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return BaseT::getArithmeticInstrCost(Opcode, Ty, Op1Info, Op2Info);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index,
Type *SubTp) {
[CostModel][X86] Pulled out common type legalization code llvm-svn: 291109
2017-01-05 22:33:32 +08:00
// 64-bit packed float vectors (v2f32) are widened to type v4f32.
// 64-bit packed integer vectors (v2i32) are promoted to type v2i64.
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, Tp);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
// For Broadcasts we are splatting the first element from the first input
// register, so only need to reference that input and all the output
// registers are the same.
if (Kind == TTI::SK_Broadcast)
LT.first = 1;
// We are going to permute multiple sources and the result will be in multiple
// destinations. Providing an accurate cost only for splits where the element
// type remains the same.
if (Kind == TTI::SK_PermuteSingleSrc && LT.first != 1) {
MVT LegalVT = LT.second;
if (LegalVT.getVectorElementType().getSizeInBits() ==
Tp->getVectorElementType()->getPrimitiveSizeInBits() &&
LegalVT.getVectorNumElements() < Tp->getVectorNumElements()) {
unsigned VecTySize = DL.getTypeStoreSize(Tp);
unsigned LegalVTSize = LegalVT.getStoreSize();
// Number of source vectors after legalization:
unsigned NumOfSrcs = (VecTySize + LegalVTSize - 1) / LegalVTSize;
// Number of destination vectors after legalization:
unsigned NumOfDests = LT.first;
Type *SingleOpTy = VectorType::get(Tp->getVectorElementType(),
LegalVT.getVectorNumElements());
unsigned NumOfShuffles = (NumOfSrcs - 1) * NumOfDests;
return NumOfShuffles *
getShuffleCost(TTI::SK_PermuteTwoSrc, SingleOpTy, 0, nullptr);
}
return BaseT::getShuffleCost(Kind, Tp, Index, SubTp);
}
// For 2-input shuffles, we must account for splitting the 2 inputs into many.
if (Kind == TTI::SK_PermuteTwoSrc && LT.first != 1) {
AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost. In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426). * Shiffle-broadcast cost will be changed in Simon's upcoming patch. Differential Revision: https://reviews.llvm.org/D28118 llvm-svn: 290810
2017-01-02 18:37:52 +08:00
// We assume that source and destination have the same vector type.
int NumOfDests = LT.first;
int NumOfShufflesPerDest = LT.first * 2 - 1;
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
LT.first = NumOfDests * NumOfShufflesPerDest;
Add Support to Recognize and Vectorize NON SIMD instructions in SLPVectorizer. This patch adds support to recognize patterns such as fadd,fsub,fadd,fsub.../add,sub,add,sub... and vectorizes them as vector shuffles if they are profitable. These patterns of vector shuffle can later be converted to instructions such as addsubpd etc on X86. Thanks to Arnold and Hal for the reviews. http://reviews.llvm.org/D4015 llvm-svn: 211339
2014-06-20 12:32:48 +08:00
}
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
static const CostTblEntry AVX512VBMIShuffleTbl[] = {
{ TTI::SK_Reverse, MVT::v64i8, 1 }, // vpermb
{ TTI::SK_Reverse, MVT::v32i8, 1 }, // vpermb
{ TTI::SK_PermuteSingleSrc, MVT::v64i8, 1 }, // vpermb
{ TTI::SK_PermuteSingleSrc, MVT::v32i8, 1 }, // vpermb
{ TTI::SK_PermuteTwoSrc, MVT::v64i8, 1 }, // vpermt2b
{ TTI::SK_PermuteTwoSrc, MVT::v32i8, 1 }, // vpermt2b
{ TTI::SK_PermuteTwoSrc, MVT::v16i8, 1 } // vpermt2b
};
if (ST->hasVBMI())
if (const auto *Entry =
CostTableLookup(AVX512VBMIShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry AVX512BWShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v32i16, 1 }, // vpbroadcastw
{ TTI::SK_Broadcast, MVT::v64i8, 1 }, // vpbroadcastb
{ TTI::SK_Reverse, MVT::v32i16, 1 }, // vpermw
{ TTI::SK_Reverse, MVT::v16i16, 1 }, // vpermw
[X86][AVX512] Use lowerShuffleAsRepeatedMaskAndLanePermute for non-VBMI v64i8 shuffles (PR31470) llvm-svn: 291347
2017-01-07 23:37:50 +08:00
{ TTI::SK_Reverse, MVT::v64i8, 2 }, // pshufb + vshufi64x2
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
{ TTI::SK_PermuteSingleSrc, MVT::v32i16, 1 }, // vpermw
{ TTI::SK_PermuteSingleSrc, MVT::v16i16, 1 }, // vpermw
{ TTI::SK_PermuteSingleSrc, MVT::v8i16, 1 }, // vpermw
{ TTI::SK_PermuteSingleSrc, MVT::v64i8, 8 }, // extend to v32i16
{ TTI::SK_PermuteSingleSrc, MVT::v32i8, 3 }, // vpermw + zext/trunc
{ TTI::SK_PermuteTwoSrc, MVT::v32i16, 1 }, // vpermt2w
{ TTI::SK_PermuteTwoSrc, MVT::v16i16, 1 }, // vpermt2w
{ TTI::SK_PermuteTwoSrc, MVT::v8i16, 1 }, // vpermt2w
{ TTI::SK_PermuteTwoSrc, MVT::v32i8, 3 }, // zext + vpermt2w + trunc
{ TTI::SK_PermuteTwoSrc, MVT::v64i8, 19 }, // 6 * v32i8 + 1
{ TTI::SK_PermuteTwoSrc, MVT::v16i8, 3 } // zext + vpermt2w + trunc
};
if (ST->hasBWI())
if (const auto *Entry =
CostTableLookup(AVX512BWShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry AVX512ShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v8f64, 1 }, // vbroadcastpd
{ TTI::SK_Broadcast, MVT::v16f32, 1 }, // vbroadcastps
{ TTI::SK_Broadcast, MVT::v8i64, 1 }, // vpbroadcastq
{ TTI::SK_Broadcast, MVT::v16i32, 1 }, // vpbroadcastd
{ TTI::SK_Reverse, MVT::v8f64, 1 }, // vpermpd
{ TTI::SK_Reverse, MVT::v16f32, 1 }, // vpermps
{ TTI::SK_Reverse, MVT::v8i64, 1 }, // vpermq
{ TTI::SK_Reverse, MVT::v16i32, 1 }, // vpermd
{ TTI::SK_PermuteSingleSrc, MVT::v8f64, 1 }, // vpermpd
{ TTI::SK_PermuteSingleSrc, MVT::v4f64, 1 }, // vpermpd
{ TTI::SK_PermuteSingleSrc, MVT::v2f64, 1 }, // vpermpd
{ TTI::SK_PermuteSingleSrc, MVT::v16f32, 1 }, // vpermps
{ TTI::SK_PermuteSingleSrc, MVT::v8f32, 1 }, // vpermps
{ TTI::SK_PermuteSingleSrc, MVT::v4f32, 1 }, // vpermps
{ TTI::SK_PermuteSingleSrc, MVT::v8i64, 1 }, // vpermq
{ TTI::SK_PermuteSingleSrc, MVT::v4i64, 1 }, // vpermq
{ TTI::SK_PermuteSingleSrc, MVT::v2i64, 1 }, // vpermq
{ TTI::SK_PermuteSingleSrc, MVT::v16i32, 1 }, // vpermd
{ TTI::SK_PermuteSingleSrc, MVT::v8i32, 1 }, // vpermd
{ TTI::SK_PermuteSingleSrc, MVT::v4i32, 1 }, // vpermd
{ TTI::SK_PermuteSingleSrc, MVT::v16i8, 1 }, // pshufb
{ TTI::SK_PermuteTwoSrc, MVT::v8f64, 1 }, // vpermt2pd
{ TTI::SK_PermuteTwoSrc, MVT::v16f32, 1 }, // vpermt2ps
{ TTI::SK_PermuteTwoSrc, MVT::v8i64, 1 }, // vpermt2q
{ TTI::SK_PermuteTwoSrc, MVT::v16i32, 1 }, // vpermt2d
{ TTI::SK_PermuteTwoSrc, MVT::v4f64, 1 }, // vpermt2pd
{ TTI::SK_PermuteTwoSrc, MVT::v8f32, 1 }, // vpermt2ps
{ TTI::SK_PermuteTwoSrc, MVT::v4i64, 1 }, // vpermt2q
{ TTI::SK_PermuteTwoSrc, MVT::v8i32, 1 }, // vpermt2d
{ TTI::SK_PermuteTwoSrc, MVT::v2f64, 1 }, // vpermt2pd
{ TTI::SK_PermuteTwoSrc, MVT::v4f32, 1 }, // vpermt2ps
{ TTI::SK_PermuteTwoSrc, MVT::v2i64, 1 }, // vpermt2q
{ TTI::SK_PermuteTwoSrc, MVT::v4i32, 1 } // vpermt2d
};
if (ST->hasAVX512())
if (const auto *Entry = CostTableLookup(AVX512ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry AVX2ShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v4f64, 1 }, // vbroadcastpd
{ TTI::SK_Broadcast, MVT::v8f32, 1 }, // vbroadcastps
{ TTI::SK_Broadcast, MVT::v4i64, 1 }, // vpbroadcastq
{ TTI::SK_Broadcast, MVT::v8i32, 1 }, // vpbroadcastd
{ TTI::SK_Broadcast, MVT::v16i16, 1 }, // vpbroadcastw
{ TTI::SK_Broadcast, MVT::v32i8, 1 }, // vpbroadcastb
{ TTI::SK_Reverse, MVT::v4f64, 1 }, // vpermpd
{ TTI::SK_Reverse, MVT::v8f32, 1 }, // vpermps
{ TTI::SK_Reverse, MVT::v4i64, 1 }, // vpermq
{ TTI::SK_Reverse, MVT::v8i32, 1 }, // vpermd
{ TTI::SK_Reverse, MVT::v16i16, 2 }, // vperm2i128 + pshufb
{ TTI::SK_Reverse, MVT::v32i8, 2 }, // vperm2i128 + pshufb
{ TTI::SK_Alternate, MVT::v16i16, 1 }, // vpblendw
[X86] Add costs for non-AVX512 single-source permutation integer shuffles Differential Revision: https://reviews.llvm.org/D29416 llvm-svn: 293932
2017-02-03 04:27:13 +08:00
{ TTI::SK_Alternate, MVT::v32i8, 1 }, // vpblendvb
{ TTI::SK_PermuteSingleSrc, MVT::v4i64, 1 }, // vpermq
{ TTI::SK_PermuteSingleSrc, MVT::v8i32, 1 }, // vpermd
{ TTI::SK_PermuteSingleSrc, MVT::v16i16, 4 }, // vperm2i128 + 2 * vpshufb
// + vpblendvb
{ TTI::SK_PermuteSingleSrc, MVT::v32i8, 4 } // vperm2i128 + 2 * vpshufb
// + vpblendvb
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
};
if (ST->hasAVX2())
if (const auto *Entry = CostTableLookup(AVX2ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry AVX1ShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v4f64, 2 }, // vperm2f128 + vpermilpd
{ TTI::SK_Broadcast, MVT::v8f32, 2 }, // vperm2f128 + vpermilps
{ TTI::SK_Broadcast, MVT::v4i64, 2 }, // vperm2f128 + vpermilpd
{ TTI::SK_Broadcast, MVT::v8i32, 2 }, // vperm2f128 + vpermilps
{ TTI::SK_Broadcast, MVT::v16i16, 3 }, // vpshuflw + vpshufd + vinsertf128
{ TTI::SK_Broadcast, MVT::v32i8, 2 }, // vpshufb + vinsertf128
{ TTI::SK_Reverse, MVT::v4f64, 2 }, // vperm2f128 + vpermilpd
{ TTI::SK_Reverse, MVT::v8f32, 2 }, // vperm2f128 + vpermilps
{ TTI::SK_Reverse, MVT::v4i64, 2 }, // vperm2f128 + vpermilpd
{ TTI::SK_Reverse, MVT::v8i32, 2 }, // vperm2f128 + vpermilps
{ TTI::SK_Reverse, MVT::v16i16, 4 }, // vextractf128 + 2*pshufb
// + vinsertf128
{ TTI::SK_Reverse, MVT::v32i8, 4 }, // vextractf128 + 2*pshufb
// + vinsertf128
{ TTI::SK_Alternate, MVT::v4i64, 1 }, // vblendpd
{ TTI::SK_Alternate, MVT::v4f64, 1 }, // vblendpd
{ TTI::SK_Alternate, MVT::v8i32, 1 }, // vblendps
{ TTI::SK_Alternate, MVT::v8f32, 1 }, // vblendps
{ TTI::SK_Alternate, MVT::v16i16, 3 }, // vpand + vpandn + vpor
{ TTI::SK_Alternate, MVT::v32i8, 3 } // vpand + vpandn + vpor
};
if (ST->hasAVX())
if (const auto *Entry = CostTableLookup(AVX1ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry SSE41ShuffleTbl[] = {
{ TTI::SK_Alternate, MVT::v2i64, 1 }, // pblendw
{ TTI::SK_Alternate, MVT::v2f64, 1 }, // movsd
{ TTI::SK_Alternate, MVT::v4i32, 1 }, // pblendw
{ TTI::SK_Alternate, MVT::v4f32, 1 }, // blendps
{ TTI::SK_Alternate, MVT::v8i16, 1 }, // pblendw
{ TTI::SK_Alternate, MVT::v16i8, 1 } // pblendvb
};
if (ST->hasSSE41())
if (const auto *Entry = CostTableLookup(SSE41ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry SSSE3ShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v8i16, 1 }, // pshufb
{ TTI::SK_Broadcast, MVT::v16i8, 1 }, // pshufb
{ TTI::SK_Reverse, MVT::v8i16, 1 }, // pshufb
{ TTI::SK_Reverse, MVT::v16i8, 1 }, // pshufb
{ TTI::SK_Alternate, MVT::v8i16, 3 }, // pshufb + pshufb + por
[X86] Add costs for non-AVX512 single-source permutation integer shuffles Differential Revision: https://reviews.llvm.org/D29416 llvm-svn: 293932
2017-02-03 04:27:13 +08:00
{ TTI::SK_Alternate, MVT::v16i8, 3 }, // pshufb + pshufb + por
{ TTI::SK_PermuteSingleSrc, MVT::v8i16, 1 }, // pshufb
{ TTI::SK_PermuteSingleSrc, MVT::v16i8, 1 } // pshufb
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
};
if (ST->hasSSSE3())
if (const auto *Entry = CostTableLookup(SSSE3ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry SSE2ShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v2f64, 1 }, // shufpd
{ TTI::SK_Broadcast, MVT::v2i64, 1 }, // pshufd
{ TTI::SK_Broadcast, MVT::v4i32, 1 }, // pshufd
{ TTI::SK_Broadcast, MVT::v8i16, 2 }, // pshuflw + pshufd
{ TTI::SK_Broadcast, MVT::v16i8, 3 }, // unpck + pshuflw + pshufd
{ TTI::SK_Reverse, MVT::v2f64, 1 }, // shufpd
{ TTI::SK_Reverse, MVT::v2i64, 1 }, // pshufd
{ TTI::SK_Reverse, MVT::v4i32, 1 }, // pshufd
{ TTI::SK_Reverse, MVT::v8i16, 3 }, // pshuflw + pshufhw + pshufd
{ TTI::SK_Reverse, MVT::v16i8, 9 }, // 2*pshuflw + 2*pshufhw
// + 2*pshufd + 2*unpck + packus
{ TTI::SK_Alternate, MVT::v2i64, 1 }, // movsd
{ TTI::SK_Alternate, MVT::v2f64, 1 }, // movsd
{ TTI::SK_Alternate, MVT::v4i32, 2 }, // 2*shufps
{ TTI::SK_Alternate, MVT::v8i16, 3 }, // pand + pandn + por
[X86] Add costs for non-AVX512 single-source permutation integer shuffles Differential Revision: https://reviews.llvm.org/D29416 llvm-svn: 293932
2017-02-03 04:27:13 +08:00
{ TTI::SK_Alternate, MVT::v16i8, 3 }, // pand + pandn + por
{ TTI::SK_PermuteSingleSrc, MVT::v2i64, 1 }, // pshufd
{ TTI::SK_PermuteSingleSrc, MVT::v4i32, 1 } // pshufd
[CostModel][X86] Merged SK_PermuteSingleSrc/SK_PermuteTwoSrc into common shuffle cost LUTs. NFCI. llvm-svn: 291146
2017-01-06 01:56:19 +08:00
};
if (ST->hasSSE2())
if (const auto *Entry = CostTableLookup(SSE2ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
static const CostTblEntry SSE1ShuffleTbl[] = {
{ TTI::SK_Broadcast, MVT::v4f32, 1 }, // shufps
{ TTI::SK_Reverse, MVT::v4f32, 1 }, // shufps
{ TTI::SK_Alternate, MVT::v4f32, 2 } // 2*shufps
};
if (ST->hasSSE1())
if (const auto *Entry = CostTableLookup(SSE1ShuffleTbl, Kind, LT.second))
return LT.first * Entry->Cost;
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return BaseT::getShuffleCost(Kind, Tp, Index, SubTp);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[SystemZ] TargetTransformInfo cost functions implemented. getArithmeticInstrCost(), getShuffleCost(), getCastInstrCost(), getCmpSelInstrCost(), getVectorInstrCost(), getMemoryOpCost(), getInterleavedMemoryOpCost() implemented. Interleaved access vectorization enabled. BasicTTIImpl::getCastInstrCost() improved to check for legal extending loads, in which case the cost of the z/sext instruction becomes 0. Review: Ulrich Weigand, Renato Golin. https://reviews.llvm.org/D29631 llvm-svn: 300052
2017-04-12 19:49:08 +08:00
int X86TTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
const Instruction *I) {
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
int ISD = TLI->InstructionOpcodeToISD(Opcode);
assert(ISD && "Invalid opcode");
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
// FIXME: Need a better design of the cost table to handle non-simple types of
// potential massive combinations (elem_num x src_type x dst_type).
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
static const TypeConversionCostTblEntry AVX512DQConversionTbl[] = {
[X86][AVX512] Add support for v2i64 fptosi/fptoui/sitofp/uitofp on AVX512DQ-only targets Use 512-bit instructions with subvector insertion/extraction like we do in a number of similar circumstances llvm-svn: 287882
2016-11-24 22:46:55 +08:00
{ ISD::SINT_TO_FP, MVT::v2f32, MVT::v2i64, 1 },
{ ISD::SINT_TO_FP, MVT::v2f64, MVT::v2i64, 1 },
[X86][AVX512] Add support for v4i64 fptosi/fptoui/sitofp/uitofp on AVX512DQ-only targets Use 512-bit instructions with subvector insertion/extraction like we do in a number of similar circumstances llvm-svn: 287762
2016-11-23 22:01:18 +08:00
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i64, 1 },
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i64, 1 },
[CostModel][X86] Add missing AVX512DQ v8i64 fptosi/sitofp costs llvm-svn: 287760
2016-11-23 21:42:09 +08:00
{ ISD::SINT_TO_FP, MVT::v8f32, MVT::v8i64, 1 },
{ ISD::SINT_TO_FP, MVT::v8f64, MVT::v8i64, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v2f32, MVT::v2i64, 1 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i64, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i64, 1 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i64, 1 },
Strip trailing whitespace llvm-svn: 275726
2016-07-18 03:02:27 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i64, 1 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i64, 1 },
[X86][AVX512] Add support for v2i64 fptosi/fptoui/sitofp/uitofp on AVX512DQ-only targets Use 512-bit instructions with subvector insertion/extraction like we do in a number of similar circumstances llvm-svn: 287882
2016-11-24 22:46:55 +08:00
{ ISD::FP_TO_SINT, MVT::v2i64, MVT::v2f32, 1 },
[X86][AVX512] Add support for v4i64 fptosi/fptoui/sitofp/uitofp on AVX512DQ-only targets Use 512-bit instructions with subvector insertion/extraction like we do in a number of similar circumstances llvm-svn: 287762
2016-11-23 22:01:18 +08:00
{ ISD::FP_TO_SINT, MVT::v4i64, MVT::v4f32, 1 },
[CostModel][X86] Add missing AVX512DQ v8i64 fptosi/sitofp costs llvm-svn: 287760
2016-11-23 21:42:09 +08:00
{ ISD::FP_TO_SINT, MVT::v8i64, MVT::v8f32, 1 },
[X86][AVX512] Add support for v2i64 fptosi/fptoui/sitofp/uitofp on AVX512DQ-only targets Use 512-bit instructions with subvector insertion/extraction like we do in a number of similar circumstances llvm-svn: 287882
2016-11-24 22:46:55 +08:00
{ ISD::FP_TO_SINT, MVT::v2i64, MVT::v2f64, 1 },
[X86][AVX512] Add support for v4i64 fptosi/fptoui/sitofp/uitofp on AVX512DQ-only targets Use 512-bit instructions with subvector insertion/extraction like we do in a number of similar circumstances llvm-svn: 287762
2016-11-23 22:01:18 +08:00
{ ISD::FP_TO_SINT, MVT::v4i64, MVT::v4f64, 1 },
[CostModel][X86] Add missing AVX512DQ v8i64 fptosi/sitofp costs llvm-svn: 287760
2016-11-23 21:42:09 +08:00
{ ISD::FP_TO_SINT, MVT::v8i64, MVT::v8f64, 1 },
{ ISD::FP_TO_UINT, MVT::v2i64, MVT::v2f32, 1 },
{ ISD::FP_TO_UINT, MVT::v4i64, MVT::v4f32, 1 },
{ ISD::FP_TO_UINT, MVT::v8i64, MVT::v8f32, 1 },
{ ISD::FP_TO_UINT, MVT::v2i64, MVT::v2f64, 1 },
{ ISD::FP_TO_UINT, MVT::v4i64, MVT::v4f64, 1 },
{ ISD::FP_TO_UINT, MVT::v8i64, MVT::v8f64, 1 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
};
[X86] Make some cast costs more precise Make some AVX and AVX512 cast costs more precise. Based on part of a patch by Elena Demikhovsky (D15604). Differential Revision: http://reviews.llvm.org/D22064 llvm-svn: 275106
2016-07-12 05:39:44 +08:00
// TODO: For AVX512DQ + AVX512VL, we also have cheap casts for 128-bit and
// 256-bit wide vectors.
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
static const TypeConversionCostTblEntry AVX512FConversionTbl[] = {
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
{ ISD::FP_EXTEND, MVT::v8f64, MVT::v8f32, 1 },
{ ISD::FP_EXTEND, MVT::v8f64, MVT::v16f32, 3 },
{ ISD::FP_ROUND, MVT::v8f32, MVT::v8f64, 1 },
{ ISD::TRUNCATE, MVT::v16i8, MVT::v16i32, 1 },
{ ISD::TRUNCATE, MVT::v16i16, MVT::v16i32, 1 },
{ ISD::TRUNCATE, MVT::v8i16, MVT::v8i64, 1 },
{ ISD::TRUNCATE, MVT::v8i32, MVT::v8i64, 1 },
// v16i1 -> v16i32 - load + broadcast
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i1, 2 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i1, 2 },
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i8, 1 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i16, 1 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i16, 1 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::ZERO_EXTEND, MVT::v8i64, MVT::v8i16, 1 },
{ ISD::SIGN_EXTEND, MVT::v8i64, MVT::v8i16, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i64, MVT::v8i32, 1 },
{ ISD::ZERO_EXTEND, MVT::v8i64, MVT::v8i32, 1 },
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f64, MVT::v8i1, 4 },
AVX-512: SINT_TO_FP cost model and some bugfixes Checked some corner cases, for example translation of <8 x i1> to <8 x double> llvm-svn: 221883
2014-11-13 19:46:16 +08:00
{ ISD::SINT_TO_FP, MVT::v16f32, MVT::v16i1, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f64, MVT::v8i8, 2 },
AVX-512: SINT_TO_FP cost model and some bugfixes Checked some corner cases, for example translation of <8 x i1> to <8 x double> llvm-svn: 221883
2014-11-13 19:46:16 +08:00
{ ISD::SINT_TO_FP, MVT::v16f32, MVT::v16i8, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f64, MVT::v8i16, 2 },
AVX-512: SINT_TO_FP cost model and some bugfixes Checked some corner cases, for example translation of <8 x i1> to <8 x double> llvm-svn: 221883
2014-11-13 19:46:16 +08:00
{ ISD::SINT_TO_FP, MVT::v16f32, MVT::v16i16, 2 },
{ ISD::SINT_TO_FP, MVT::v16f32, MVT::v16i32, 1 },
{ ISD::SINT_TO_FP, MVT::v8f64, MVT::v8i32, 1 },
[X86] Make some cast costs more precise Make some AVX and AVX512 cast costs more precise. Based on part of a patch by Elena Demikhovsky (D15604). Differential Revision: http://reviews.llvm.org/D22064 llvm-svn: 275106
2016-07-12 05:39:44 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i64, 26 },
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i64, 26 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i1, 4 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v16f32, MVT::v16i1, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i8, 2 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i8, 2 },
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i8, 2 },
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i8, 2 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v16f32, MVT::v16i8, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i16, 5 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i16, 2 },
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i16, 2 },
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i16, 2 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v16f32, MVT::v16i16, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v2f32, MVT::v2i32, 2 },
Strip trailing whitespace llvm-svn: 275726
2016-07-18 03:02:27 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i32, 1 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i32, 1 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i32, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i32, 1 },
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i32, 1 },
{ ISD::UINT_TO_FP, MVT::v16f32, MVT::v16i32, 1 },
Strip trailing whitespace llvm-svn: 275726
2016-07-18 03:02:27 +08:00
{ ISD::UINT_TO_FP, MVT::v2f32, MVT::v2i64, 5 },
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i64, 5 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i64, 12 },
{ ISD::UINT_TO_FP, MVT::v8f64, MVT::v8i64, 26 },
{ ISD::FP_TO_UINT, MVT::v2i32, MVT::v2f32, 1 },
{ ISD::FP_TO_UINT, MVT::v4i32, MVT::v4f32, 1 },
{ ISD::FP_TO_UINT, MVT::v8i32, MVT::v8f32, 1 },
{ ISD::FP_TO_UINT, MVT::v16i32, MVT::v16f32, 1 },
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const TypeConversionCostTblEntry AVX2ConversionTbl[] = {
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i1, 3 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i1, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i1, 3 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i1, 3 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i8, 3 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i8, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i8, 3 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i8, 3 },
{ ISD::SIGN_EXTEND, MVT::v16i16, MVT::v16i8, 1 },
{ ISD::ZERO_EXTEND, MVT::v16i16, MVT::v16i8, 1 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i16, 3 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i16, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i16, 1 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i16, 1 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i32, 1 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i32, 1 },
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i64, 2 },
{ ISD::TRUNCATE, MVT::v4i16, MVT::v4i64, 2 },
{ ISD::TRUNCATE, MVT::v4i32, MVT::v4i64, 2 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i32, 2 },
{ ISD::TRUNCATE, MVT::v8i16, MVT::v8i32, 2 },
{ ISD::TRUNCATE, MVT::v8i32, MVT::v8i64, 4 },
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
{ ISD::FP_EXTEND, MVT::v8f64, MVT::v8f32, 3 },
{ ISD::FP_ROUND, MVT::v8f32, MVT::v8f64, 3 },
[X86] Custom lower UINT_TO_FP from v4f32 to v4i32, and for v8f32 to v8i32 if AVX2 is available. According to IACA, the new lowering has a throughput of 8 cycles instead of 13 with the previous one. Althought this lowering kicks in some SPECs benchmarks, the performance improvement was within the noise. Correctness testing has been done for the whole range of uint32_t with the following program: uint4 v = (uint4) {0,1,2,3}; uint32_t i; //Check correctness over entire range for uint4 -> float4 conversion for( i = 0; i < 1U << (32-2); i++ ) { float4 t = test(v); float4 c = correct(v); if( 0xf != _mm_movemask_ps( t == c )) { printf( "Error @ %vx: %vf vs. %vf\n", v, c, t); return -1; } v += 4; } Where "correct" is the old lowering and "test" the new one. The patch adds a test case for the two custom lowering instruction. It also modifies the vector cost model, which is why cast.ll and uitofp.ll are modified. 2009-02-26-MachineLICMBug.ll is also modified because we now hoist 7 instructions instead of 4 (3 more constant loads). rdar://problem/18153096> llvm-svn: 221657
2014-11-11 10:23:47 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i32, 8 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const TypeConversionCostTblEntry AVXConversionTbl[] = {
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i1, 6 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i1, 4 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i1, 7 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i1, 4 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i8, 6 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i8, 4 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i8, 7 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i8, 4 },
{ ISD::SIGN_EXTEND, MVT::v16i16, MVT::v16i8, 4 },
{ ISD::ZERO_EXTEND, MVT::v16i16, MVT::v16i8, 4 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i16, 6 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i16, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i16, 4 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i16, 4 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i32, 4 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i32, 4 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::TRUNCATE, MVT::v16i8, MVT::v16i16, 4 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i32, 4 },
{ ISD::TRUNCATE, MVT::v8i16, MVT::v8i32, 5 },
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i64, 4 },
{ ISD::TRUNCATE, MVT::v4i16, MVT::v4i64, 4 },
{ ISD::TRUNCATE, MVT::v4i32, MVT::v4i64, 4 },
{ ISD::TRUNCATE, MVT::v8i32, MVT::v8i64, 9 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i1, 3 },
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i1, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f32, MVT::v8i1, 8 },
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i8, 3 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i8, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f32, MVT::v8i8, 8 },
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i16, 3 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i16, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f32, MVT::v8i16, 5 },
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i32, 1 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i32, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v8f32, MVT::v8i32, 1 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i1, 7 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i1, 7 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i1, 6 },
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i8, 2 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i8, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i8, 5 },
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i16, 2 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i16, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i16, 5 },
[X86] Make some cast costs more precise Make some AVX and AVX512 cast costs more precise. Based on part of a patch by Elena Demikhovsky (D15604). Differential Revision: http://reviews.llvm.org/D22064 llvm-svn: 275106
2016-07-12 05:39:44 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i32, 6 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i32, 6 },
X86TTI: Add accurate costs for itofp operations, based on the actual instruction counts. llvm-svn: 178459
2013-04-01 18:23:49 +08:00
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i32, 6 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v8f32, MVT::v8i32, 9 },
[X86][Vector Cost Model] Add a comment to explain the workaround in my previous commit (r204884). <rdar://problem/16381225> llvm-svn: 204972
2014-03-28 06:27:41 +08:00
// The generic code to compute the scalar overhead is currently broken.
// Workaround this limitation by estimating the scalarization overhead
// here. We have roughly 10 instructions per scalar element.
// Multiply that by the vector width.
// FIXME: remove that when PR19268 is fixed.
[X86] Make some cast costs more precise Make some AVX and AVX512 cast costs more precise. Based on part of a patch by Elena Demikhovsky (D15604). Differential Revision: http://reviews.llvm.org/D22064 llvm-svn: 275106
2016-07-12 05:39:44 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i64, 10 },
{ ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i64, 20 },
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i64, 13 },
{ ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i64, 13 },
Strip trailing whitespace llvm-svn: 275726
2016-07-18 03:02:27 +08:00
Revert CostTable algorithm, will re-write llvm-svn: 172992
2013-01-21 04:57:20 +08:00
{ ISD::FP_TO_SINT, MVT::v4i8, MVT::v4f32, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::FP_TO_SINT, MVT::v8i8, MVT::v8f32, 7 },
[X86] Adjust cost of FP_TO_UINT v8f32->v8i32 There is no direct AVX instruction to convert to unsigned. I have some ideas how we may be able to do this with three vector instructions but the current backend just bails on this to get it scalarized. See the comment why we need to adjust the cost returned by BasicTTI. The test is a bit roundabout (and checks assembly rather than bit code) because I'd like it to work even if at some point we could vectorize this conversion. Fixes <rdar://problem/16371920> llvm-svn: 205159
2014-03-31 02:07:13 +08:00
// This node is expanded into scalarized operations but BasicTTI is overly
// optimistic estimating its cost. It computes 3 per element (one
// vector-extract, one scalar conversion and one vector-insert). The
// problem is that the inserts form a read-modify-write chain so latency
// should be factored in too. Inflating the cost per element by 1.
{ ISD::FP_TO_UINT, MVT::v8i32, MVT::v8f32, 8*4 },
[X86] Adjust cost of FP_TO_UINT v4f64->v4i32 as well Pretty obvious follow-on to r205159 to also handle conversion from double besides float. Fixes <rdar://problem/16373208> llvm-svn: 205253
2014-04-01 05:54:48 +08:00
{ ISD::FP_TO_UINT, MVT::v4i32, MVT::v4f64, 4*4 },
[X86] Make some cast costs more precise Make some AVX and AVX512 cast costs more precise. Based on part of a patch by Elena Demikhovsky (D15604). Differential Revision: http://reviews.llvm.org/D22064 llvm-svn: 275106
2016-07-12 05:39:44 +08:00
{ ISD::FP_EXTEND, MVT::v4f64, MVT::v4f32, 1 },
{ ISD::FP_ROUND, MVT::v4f32, MVT::v4f64, 1 },
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
};
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
static const TypeConversionCostTblEntry SSE41ConversionTbl[] = {
[X86] Add costs for SSE zext/sext to v4i64 to TTI The costs are somewhat hand-wavy, but should be much closer to the truth than what we get from BasicTTI. Differential Revision: http://reviews.llvm.org/D21156 llvm-svn: 272406
2016-06-11 01:01:05 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i8, 2 },
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i8, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i16, 2 },
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i16, 2 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i32, 2 },
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i32, 2 },
[X86] Add costs for SSE zext/sext to v4i64 to TTI The costs are somewhat hand-wavy, but should be much closer to the truth than what we get from BasicTTI. Differential Revision: http://reviews.llvm.org/D21156 llvm-svn: 272406
2016-06-11 01:01:05 +08:00
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i16, MVT::v4i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v4i16, MVT::v4i8, 2 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i32, MVT::v4i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v4i32, MVT::v4i8, 1 },
{ ISD::ZERO_EXTEND, MVT::v8i16, MVT::v8i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v8i16, MVT::v8i8, 1 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i8, 2 },
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i8, 2 },
{ ISD::ZERO_EXTEND, MVT::v16i16, MVT::v16i8, 2 },
{ ISD::SIGN_EXTEND, MVT::v16i16, MVT::v16i8, 2 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i8, 4 },
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i8, 4 },
{ ISD::ZERO_EXTEND, MVT::v4i32, MVT::v4i16, 1 },
{ ISD::SIGN_EXTEND, MVT::v4i32, MVT::v4i16, 1 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i16, 2 },
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i16, 2 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i16, 4 },
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i16, 4 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i16, 2 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i16, 1 },
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i32, 1 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
{ ISD::TRUNCATE, MVT::v4i16, MVT::v4i32, 1 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i32, 3 },
Strip trailing whitespace llvm-svn: 275726
2016-07-18 03:02:27 +08:00
{ ISD::TRUNCATE, MVT::v8i16, MVT::v8i32, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::TRUNCATE, MVT::v16i16, MVT::v16i32, 6 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
};
static const TypeConversionCostTblEntry SSE2ConversionTbl[] = {
[X86][SSE] Reordered cast vectorization costs. NFCI. Reordered the data tables at the top and placed the lookups after. The first stage in the yak shaving necessary to get more accurate costs for a variety of targets given the recent improvements to SINT_TO_FP/UINT_TO_FP/SIGN_EXTEND vector lowering. llvm-svn: 242643
2015-07-19 23:36:12 +08:00
// These are somewhat magic numbers justified by looking at the output of
// Intel's IACA, running some kernels and making sure when we take
// legalization into account the throughput will be overestimated.
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v16i8, 8 },
[X86][SSE] Reordered cast vectorization costs. NFCI. Reordered the data tables at the top and placed the lookups after. The first stage in the yak shaving necessary to get more accurate costs for a variety of targets given the recent improvements to SINT_TO_FP/UINT_TO_FP/SIGN_EXTEND vector lowering. llvm-svn: 242643
2015-07-19 23:36:12 +08:00
{ ISD::SINT_TO_FP, MVT::v2f64, MVT::v16i8, 16*10 },
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v8i16, 15 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v2f64, MVT::v8i16, 8*10 },
[x86] fix cost of SINT_TO_FP for i32 --> float (PR21356, PR28434) This is "cvtdq2ps" which does not appear to be particularly slow on any CPU according to Agner's tables. Choosing "5" as a cost here as suggested in: https://llvm.org/bugs/show_bug.cgi?id=21356 ...but it seems very conservative given that the instruction is fully pipelined, and I think these costs are supposed to model throughput. Note that related costs are also most likely too high, but this fixes PR21356 and partly fixes PR28434. llvm-svn: 274658
2016-07-07 03:15:54 +08:00
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v4i32, 5 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::SINT_TO_FP, MVT::v2f64, MVT::v4i32, 4*10 },
{ ISD::SINT_TO_FP, MVT::v4f32, MVT::v2i64, 15 },
{ ISD::SINT_TO_FP, MVT::v2f64, MVT::v2i64, 2*10 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v16i8, 16*10 },
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v16i8, 8 },
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v8i16, 15 },
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v8i16, 8*10 },
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v4i32, 4*10 },
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v4i32, 8 },
{ ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i64, 2*10 },
{ ISD::UINT_TO_FP, MVT::v4f32, MVT::v2i64, 15 },
[X86] Add costs for SSE zext/sext to v4i64 to TTI The costs are somewhat hand-wavy, but should be much closer to the truth than what we get from BasicTTI. Differential Revision: http://reviews.llvm.org/D21156 llvm-svn: 272406
2016-06-11 01:01:05 +08:00
[X86][SSE] Add lowering to cvttpd2dq/cvttps2dq for sitofp v2f64/2f32 to 2i32 As discussed on PR28461 we currently miss the chance to lower "fptosi <2 x double> %arg to <2 x i32>" to cvttpd2dq due to its use of illegal types. This patch adds support for fptosi to 2i32 from both 2f64 and 2f32. It also recognises that cvttpd2dq zeroes the upper 64-bits of the xmm result (similar to D23797) - we still don't do this for the cvttpd2dq/cvttps2dq intrinsics - this can be done in a future patch. Differential Revision: https://reviews.llvm.org/D23808 llvm-svn: 284459
2016-10-18 15:42:15 +08:00
{ ISD::FP_TO_SINT, MVT::v2i32, MVT::v2f64, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i16, MVT::v4i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v4i16, MVT::v4i8, 6 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i32, MVT::v4i8, 2 },
{ ISD::SIGN_EXTEND, MVT::v4i32, MVT::v4i8, 3 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i8, 4 },
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i8, 8 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
{ ISD::ZERO_EXTEND, MVT::v8i16, MVT::v8i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v8i16, MVT::v8i8, 2 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i8, 6 },
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i8, 6 },
{ ISD::ZERO_EXTEND, MVT::v16i16, MVT::v16i8, 3 },
{ ISD::SIGN_EXTEND, MVT::v16i16, MVT::v16i8, 4 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i8, 9 },
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i8, 12 },
{ ISD::ZERO_EXTEND, MVT::v4i32, MVT::v4i16, 1 },
{ ISD::SIGN_EXTEND, MVT::v4i32, MVT::v4i16, 2 },
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i16, 3 },
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i16, 10 },
{ ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i16, 3 },
{ ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i16, 4 },
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i16, 6 },
Strip trailing whitespace llvm-svn: 275726
2016-07-18 03:02:27 +08:00
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i16, 8 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::ZERO_EXTEND, MVT::v4i64, MVT::v4i32, 3 },
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i32, 5 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i16, 4 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i16, 2 },
{ ISD::TRUNCATE, MVT::v16i8, MVT::v16i16, 3 },
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i32, 3 },
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
{ ISD::TRUNCATE, MVT::v4i16, MVT::v4i32, 3 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i32, 4 },
[X86] Sort cast cost tables. NFC. Cast cost tables are now sorted, for each cast type, lexicographically on [source base type, source vector width, dest base type, base vector width]. llvm-svn: 274653
2016-07-07 02:26:48 +08:00
{ ISD::TRUNCATE, MVT::v16i8, MVT::v16i32, 7 },
{ ISD::TRUNCATE, MVT::v8i16, MVT::v8i32, 5 },
{ ISD::TRUNCATE, MVT::v16i16, MVT::v16i32, 10 },
[X86][SSE] Reordered cast vectorization costs. NFCI. Reordered the data tables at the top and placed the lookups after. The first stage in the yak shaving necessary to get more accurate costs for a variety of targets given the recent improvements to SINT_TO_FP/UINT_TO_FP/SIGN_EXTEND vector lowering. llvm-svn: 242643
2015-07-19 23:36:12 +08:00
};
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LTSrc = TLI->getTypeLegalizationCost(DL, Src);
std::pair<int, MVT> LTDest = TLI->getTypeLegalizationCost(DL, Dst);
[X86][SSE] Reordered cast vectorization costs. NFCI. Reordered the data tables at the top and placed the lookups after. The first stage in the yak shaving necessary to get more accurate costs for a variety of targets given the recent improvements to SINT_TO_FP/UINT_TO_FP/SIGN_EXTEND vector lowering. llvm-svn: 242643
2015-07-19 23:36:12 +08:00
if (ST->hasSSE2() && !ST->hasAVX()) {
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
if (const auto *Entry = ConvertCostTableLookup(SSE2ConversionTbl, ISD,
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
LTDest.second, LTSrc.second))
return LTSrc.first * Entry->Cost;
[X86][SSE] Reordered cast vectorization costs. NFCI. Reordered the data tables at the top and placed the lookups after. The first stage in the yak shaving necessary to get more accurate costs for a variety of targets given the recent improvements to SINT_TO_FP/UINT_TO_FP/SIGN_EXTEND vector lowering. llvm-svn: 242643
2015-07-19 23:36:12 +08:00
}
EVT SrcTy = TLI->getValueType(DL, Src);
EVT DstTy = TLI->getValueType(DL, Dst);
// The function getSimpleVT only handles simple value types.
if (!SrcTy.isSimple() || !DstTy.isSimple())
return BaseT::getCastInstrCost(Opcode, Dst, Src);
AVX-512: Updated cost of FP/SINT/UINT conversion operations I checked and updated the cost of AVX-512 conversion operations. Added cost of conversion operations in DQ mode. Conversion of illegal types that requires vector split is not calculated right now (like for other X86 targets). Differential Revision: http://reviews.llvm.org/D15074 llvm-svn: 254494
2015-12-02 16:59:47 +08:00
if (ST->hasDQI())
if (const auto *Entry = ConvertCostTableLookup(AVX512DQConversionTbl, ISD,
DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
return Entry->Cost;
if (ST->hasAVX512())
if (const auto *Entry = ConvertCostTableLookup(AVX512FConversionTbl, ISD,
DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
return Entry->Cost;
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
if (ST->hasAVX2()) {
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (const auto *Entry = ConvertCostTableLookup(AVX2ConversionTbl, ISD,
DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
return Entry->Cost;
X86: add costs for 64-bit vector ext/trunc & rebalance The most important part of this is probably adding any cost at all for operations like zext <8 x i8> to <8 x i32>. Before they were being recorded as extremely costly (24, I believe) which made LLVM fall back on a 4-wide vectorisation of a loop. It also rebalances the values for sext, zext and trunc. Lacking any other sane metric that might work across CPU microarchitectures I went for instructions. This seems to be in reasonable accord with the rest of the table (sitofp, ...) though no doubt at least one value is sub-optimal for some bizarre reason. Finally, separate AVX and AVX2 values are provided where appropriate. The CodeGen is quite different in many cases. rdar://problem/15981990 llvm-svn: 200928
2014-02-07 02:18:36 +08:00
}
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
if (ST->hasAVX()) {
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (const auto *Entry = ConvertCostTableLookup(AVXConversionTbl, ISD,
DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
[X86][SSE] Update the cost table for integer-integer conversions on SSE2/SSE4.1. Previously in the conversion cost table there are no entries for integer-integer conversions on SSE2. This will result in imprecise costs for certain vectorized operations. This patch adds those entries for SSE2 and SSE4.1. The cost numbers are counted from the result of running llc on the new test case in this patch. Differential revision: http://reviews.llvm.org/D15132 llvm-svn: 255315
2015-12-11 08:31:39 +08:00
return Entry->Cost;
}
if (ST->hasSSE41()) {
if (const auto *Entry = ConvertCostTableLookup(SSE41ConversionTbl, ISD,
DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
return Entry->Cost;
}
if (ST->hasSSE2()) {
if (const auto *Entry = ConvertCostTableLookup(SSE2ConversionTbl, ISD,
DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
return Entry->Cost;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return BaseT::getCastInstrCost(Opcode, Dst, Src);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[SystemZ] TargetTransformInfo cost functions implemented. getArithmeticInstrCost(), getShuffleCost(), getCastInstrCost(), getCmpSelInstrCost(), getVectorInstrCost(), getMemoryOpCost(), getInterleavedMemoryOpCost() implemented. Interleaved access vectorization enabled. BasicTTIImpl::getCastInstrCost() improved to check for legal extending loads, in which case the cost of the z/sext instruction becomes 0. Review: Ulrich Weigand, Renato Golin. https://reviews.llvm.org/D29631 llvm-svn: 300052
2017-04-12 19:49:08 +08:00
int X86TTIImpl::getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
const Instruction *I) {
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
// Legalize the type.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, ValTy);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
MVT MTy = LT.second;
int ISD = TLI->InstructionOpcodeToISD(Opcode);
assert(ISD && "Invalid opcode");
[X86][SSE] Improve cost model for i64 vector comparisons on pre-SSE42 targets As discussed on PR24888, until SSE42 we don't have access to PCMPGTQ for v2i64 comparisons, but the cost models don't reflect this, resulting in over-optimistic vectorizaton. This patch adds SSE2 'base level' costs that match what a typical target is capable of and only reduces the v2i64 costs at SSE42. Technically SSE41 provides a PCMPEQQ v2i64 equality test, but as getCmpSelInstrCost doesn't give us a way to discriminate between comparison test types we can't easily make use of this, otherwise we could split the cost of integer equality and greater-than tests to give better costings of each. Differential Revision: http://reviews.llvm.org/D20057 llvm-svn: 268972
2016-05-10 05:14:38 +08:00
static const CostTblEntry SSE2CostTbl[] = {
{ ISD::SETCC, MVT::v2i64, 8 },
{ ISD::SETCC, MVT::v4i32, 1 },
{ ISD::SETCC, MVT::v8i16, 1 },
{ ISD::SETCC, MVT::v16i8, 1 },
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry SSE42CostTbl[] = {
Revert CostTable algorithm, will re-write llvm-svn: 172992
2013-01-21 04:57:20 +08:00
{ ISD::SETCC, MVT::v2f64, 1 },
{ ISD::SETCC, MVT::v4f32, 1 },
{ ISD::SETCC, MVT::v2i64, 1 },
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX1CostTbl[] = {
Revert CostTable algorithm, will re-write llvm-svn: 172992
2013-01-21 04:57:20 +08:00
{ ISD::SETCC, MVT::v4f64, 1 },
{ ISD::SETCC, MVT::v8f32, 1 },
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
// AVX1 does not support 8-wide integer compare.
Revert CostTable algorithm, will re-write llvm-svn: 172992
2013-01-21 04:57:20 +08:00
{ ISD::SETCC, MVT::v4i64, 4 },
{ ISD::SETCC, MVT::v8i32, 4 },
{ ISD::SETCC, MVT::v16i16, 4 },
{ ISD::SETCC, MVT::v32i8, 4 },
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX2CostTbl[] = {
Revert CostTable algorithm, will re-write llvm-svn: 172992
2013-01-21 04:57:20 +08:00
{ ISD::SETCC, MVT::v4i64, 1 },
{ ISD::SETCC, MVT::v8i32, 1 },
{ ISD::SETCC, MVT::v16i16, 1 },
{ ISD::SETCC, MVT::v32i8, 1 },
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX512CostTbl[] = {
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
{ ISD::SETCC, MVT::v8i64, 1 },
{ ISD::SETCC, MVT::v16i32, 1 },
{ ISD::SETCC, MVT::v8f64, 1 },
{ ISD::SETCC, MVT::v16f32, 1 },
};
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasAVX512())
if (const auto *Entry = CostTableLookup(AVX512CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
AVX-512: added cost for some AVX-512 instructions llvm-svn: 217863
2014-09-16 15:57:37 +08:00
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasAVX2())
if (const auto *Entry = CostTableLookup(AVX2CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasAVX())
if (const auto *Entry = CostTableLookup(AVX1CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasSSE42())
if (const auto *Entry = CostTableLookup(SSE42CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
[X86][SSE] Improve cost model for i64 vector comparisons on pre-SSE42 targets As discussed on PR24888, until SSE42 we don't have access to PCMPGTQ for v2i64 comparisons, but the cost models don't reflect this, resulting in over-optimistic vectorizaton. This patch adds SSE2 'base level' costs that match what a typical target is capable of and only reduces the v2i64 costs at SSE42. Technically SSE41 provides a PCMPEQQ v2i64 equality test, but as getCmpSelInstrCost doesn't give us a way to discriminate between comparison test types we can't easily make use of this, otherwise we could split the cost of integer equality and greater-than tests to give better costings of each. Differential Revision: http://reviews.llvm.org/D20057 llvm-svn: 268972
2016-05-10 05:14:38 +08:00
if (ST->hasSSE2())
if (const auto *Entry = CostTableLookup(SSE2CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[SystemZ] TargetTransformInfo cost functions implemented. getArithmeticInstrCost(), getShuffleCost(), getCastInstrCost(), getCmpSelInstrCost(), getVectorInstrCost(), getMemoryOpCost(), getInterleavedMemoryOpCost() implemented. Interleaved access vectorization enabled. BasicTTIImpl::getCastInstrCost() improved to check for legal extending loads, in which case the cost of the z/sext instruction becomes 0. Review: Ulrich Weigand, Renato Golin. https://reviews.llvm.org/D29631 llvm-svn: 300052
2017-04-12 19:49:08 +08:00
return BaseT::getCmpSelInstrCost(Opcode, ValTy, CondTy, I);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[Atomics][LoopIdiom] Recognize unordered atomic memcpy Summary: Expanding the loop idiom test for memcpy to also recognize unordered atomic memcpy. The only difference for recognizing an unordered atomic memcpy and instead of a normal memcpy is that the loads and/or stores involved are unordered atomic operations. Background: http://lists.llvm.org/pipermail/llvm-dev/2017-May/112779.html Patch by Daniel Neilson! Reviewers: reames, anna, skatkov Reviewed By: reames, anna Subscribers: llvm-commits, mzolotukhin Differential Revision: https://reviews.llvm.org/D33243 llvm-svn: 304806
2017-06-07 00:45:25 +08:00
unsigned X86TTIImpl::getAtomicMemIntrinsicMaxElementSize() const { return 16; }
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
int X86TTIImpl::getIntrinsicInstrCost(Intrinsic::ID IID, Type *RetTy,
[TargetTransformInfo] getIntrinsicInstrCost() scalarization estimation improved getIntrinsicInstrCost() used to only compute scalarization cost based on types. This patch improves this so that the actual arguments are checked when they are available, in order to handle only unique non-constant operands. Tests updates: Analysis/CostModel/X86/arith-fp.ll Transforms/LoopVectorize/AArch64/interleaved_cost.ll Transforms/LoopVectorize/ARM/interleaved_cost.ll The improvement in getOperandsScalarizationOverhead() to differentiate on constants made it necessary to update the interleaved_cost.ll tests even though they do not relate to intrinsics. Review: Hal Finkel https://reviews.llvm.org/D29540 llvm-svn: 297705
2017-03-14 14:35:36 +08:00
ArrayRef<Type *> Tys, FastMathFlags FMF,
unsigned ScalarizationCostPassed) {
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
// Costs should match the codegen from:
// BITREVERSE: llvm\test\CodeGen\X86\vector-bitreverse.ll
// BSWAP: llvm\test\CodeGen\X86\bswap-vector.ll
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
// CTLZ: llvm\test\CodeGen\X86\vector-lzcnt-*.ll
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
// CTPOP: llvm\test\CodeGen\X86\vector-popcnt-*.ll
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
// CTTZ: llvm\test\CodeGen\X86\vector-tzcnt-*.ll
[X86][AVX512] Add 512-bit vector ctlz costs + tests llvm-svn: 303300
2017-05-18 05:02:18 +08:00
static const CostTblEntry AVX512CDCostTbl[] = {
{ ISD::CTLZ, MVT::v8i64, 1 },
{ ISD::CTLZ, MVT::v16i32, 1 },
{ ISD::CTLZ, MVT::v32i16, 8 },
{ ISD::CTLZ, MVT::v64i8, 20 },
{ ISD::CTLZ, MVT::v4i64, 1 },
{ ISD::CTLZ, MVT::v8i32, 1 },
{ ISD::CTLZ, MVT::v16i16, 4 },
{ ISD::CTLZ, MVT::v32i8, 10 },
{ ISD::CTLZ, MVT::v2i64, 1 },
{ ISD::CTLZ, MVT::v4i32, 1 },
{ ISD::CTLZ, MVT::v8i16, 4 },
{ ISD::CTLZ, MVT::v16i8, 4 },
};
[X86][AVX512] Add 512-bit vector bitreverse costs + tests llvm-svn: 303283
2017-05-18 03:20:20 +08:00
static const CostTblEntry AVX512BWCostTbl[] = {
{ ISD::BITREVERSE, MVT::v8i64, 5 },
{ ISD::BITREVERSE, MVT::v16i32, 5 },
{ ISD::BITREVERSE, MVT::v32i16, 5 },
{ ISD::BITREVERSE, MVT::v64i8, 5 },
[X86][AVX512] Add 512-bit vector ctlz costs + tests llvm-svn: 303300
2017-05-18 05:02:18 +08:00
{ ISD::CTLZ, MVT::v8i64, 23 },
{ ISD::CTLZ, MVT::v16i32, 22 },
{ ISD::CTLZ, MVT::v32i16, 18 },
{ ISD::CTLZ, MVT::v64i8, 17 },
[X86][AVX512] Add 512-bit vector ctpop costs + tests llvm-svn: 303342
2017-05-18 18:42:34 +08:00
{ ISD::CTPOP, MVT::v8i64, 7 },
{ ISD::CTPOP, MVT::v16i32, 11 },
{ ISD::CTPOP, MVT::v32i16, 9 },
{ ISD::CTPOP, MVT::v64i8, 6 },
[X86][AVX512] Add 512-bit vector cttz costs + tests llvm-svn: 303293
2017-05-18 04:22:54 +08:00
{ ISD::CTTZ, MVT::v8i64, 10 },
{ ISD::CTTZ, MVT::v16i32, 14 },
{ ISD::CTTZ, MVT::v32i16, 12 },
{ ISD::CTTZ, MVT::v64i8, 9 },
[X86][AVX512] Add 512-bit vector bitreverse costs + tests llvm-svn: 303283
2017-05-18 03:20:20 +08:00
};
static const CostTblEntry AVX512CostTbl[] = {
{ ISD::BITREVERSE, MVT::v8i64, 36 },
{ ISD::BITREVERSE, MVT::v16i32, 24 },
[X86][AVX512] Add 512-bit vector ctlz costs + tests llvm-svn: 303300
2017-05-18 05:02:18 +08:00
{ ISD::CTLZ, MVT::v8i64, 29 },
{ ISD::CTLZ, MVT::v16i32, 35 },
[X86][AVX512] Add 512-bit vector ctpop costs + tests llvm-svn: 303342
2017-05-18 18:42:34 +08:00
{ ISD::CTPOP, MVT::v8i64, 16 },
{ ISD::CTPOP, MVT::v16i32, 24 },
[X86][AVX512] Add 512-bit vector cttz costs + tests llvm-svn: 303293
2017-05-18 04:22:54 +08:00
{ ISD::CTTZ, MVT::v8i64, 20 },
{ ISD::CTTZ, MVT::v16i32, 28 },
[X86][AVX512] Add 512-bit vector bitreverse costs + tests llvm-svn: 303283
2017-05-18 03:20:20 +08:00
};
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
static const CostTblEntry XOPCostTbl[] = {
{ ISD::BITREVERSE, MVT::v4i64, 4 },
{ ISD::BITREVERSE, MVT::v8i32, 4 },
{ ISD::BITREVERSE, MVT::v16i16, 4 },
{ ISD::BITREVERSE, MVT::v32i8, 4 },
{ ISD::BITREVERSE, MVT::v2i64, 1 },
{ ISD::BITREVERSE, MVT::v4i32, 1 },
{ ISD::BITREVERSE, MVT::v8i16, 1 },
{ ISD::BITREVERSE, MVT::v16i8, 1 },
{ ISD::BITREVERSE, MVT::i64, 3 },
{ ISD::BITREVERSE, MVT::i32, 3 },
{ ISD::BITREVERSE, MVT::i16, 3 },
{ ISD::BITREVERSE, MVT::i8, 3 }
};
[CostModel][X86][SSE] Updated costs for vector BITREVERSE ops on SSSE3+ targets To account for the fast PSHUFB implementation now available llvm-svn: 272484
2016-06-12 03:23:02 +08:00
static const CostTblEntry AVX2CostTbl[] = {
{ ISD::BITREVERSE, MVT::v4i64, 5 },
{ ISD::BITREVERSE, MVT::v8i32, 5 },
{ ISD::BITREVERSE, MVT::v16i16, 5 },
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
{ ISD::BITREVERSE, MVT::v32i8, 5 },
{ ISD::BSWAP, MVT::v4i64, 1 },
{ ISD::BSWAP, MVT::v8i32, 1 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::BSWAP, MVT::v16i16, 1 },
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
{ ISD::CTLZ, MVT::v4i64, 23 },
{ ISD::CTLZ, MVT::v8i32, 18 },
{ ISD::CTLZ, MVT::v16i16, 14 },
{ ISD::CTLZ, MVT::v32i8, 9 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::CTPOP, MVT::v4i64, 7 },
{ ISD::CTPOP, MVT::v8i32, 11 },
{ ISD::CTPOP, MVT::v16i16, 9 },
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
{ ISD::CTPOP, MVT::v32i8, 6 },
{ ISD::CTTZ, MVT::v4i64, 10 },
{ ISD::CTTZ, MVT::v8i32, 14 },
{ ISD::CTTZ, MVT::v16i16, 12 },
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
{ ISD::CTTZ, MVT::v32i8, 9 },
{ ISD::FSQRT, MVT::f32, 7 }, // Haswell from http://www.agner.org/
{ ISD::FSQRT, MVT::v4f32, 7 }, // Haswell from http://www.agner.org/
{ ISD::FSQRT, MVT::v8f32, 14 }, // Haswell from http://www.agner.org/
{ ISD::FSQRT, MVT::f64, 14 }, // Haswell from http://www.agner.org/
{ ISD::FSQRT, MVT::v2f64, 14 }, // Haswell from http://www.agner.org/
{ ISD::FSQRT, MVT::v4f64, 28 }, // Haswell from http://www.agner.org/
[CostModel][X86][SSE] Updated costs for vector BITREVERSE ops on SSSE3+ targets To account for the fast PSHUFB implementation now available llvm-svn: 272484
2016-06-12 03:23:02 +08:00
};
static const CostTblEntry AVX1CostTbl[] = {
[X86][AVX1] Improve 256-bit vector costs for integer unary intrinsics. Account for subvector extraction/insertion, helps prevent the vectorizers from selecting 256-bit vectors that will have to be split anyhow on AVX1 targets. llvm-svn: 302378
2017-05-08 04:58:55 +08:00
{ ISD::BITREVERSE, MVT::v4i64, 12 }, // 2 x 128-bit Op + extract/insert
{ ISD::BITREVERSE, MVT::v8i32, 12 }, // 2 x 128-bit Op + extract/insert
{ ISD::BITREVERSE, MVT::v16i16, 12 }, // 2 x 128-bit Op + extract/insert
{ ISD::BITREVERSE, MVT::v32i8, 12 }, // 2 x 128-bit Op + extract/insert
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
{ ISD::BSWAP, MVT::v4i64, 4 },
{ ISD::BSWAP, MVT::v8i32, 4 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::BSWAP, MVT::v16i16, 4 },
[X86][AVX1] Improve 256-bit vector costs for integer unary intrinsics. Account for subvector extraction/insertion, helps prevent the vectorizers from selecting 256-bit vectors that will have to be split anyhow on AVX1 targets. llvm-svn: 302378
2017-05-08 04:58:55 +08:00
{ ISD::CTLZ, MVT::v4i64, 48 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTLZ, MVT::v8i32, 38 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTLZ, MVT::v16i16, 30 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTLZ, MVT::v32i8, 20 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTPOP, MVT::v4i64, 16 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTPOP, MVT::v8i32, 24 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTPOP, MVT::v16i16, 20 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTPOP, MVT::v32i8, 14 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTTZ, MVT::v4i64, 22 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTTZ, MVT::v8i32, 30 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTTZ, MVT::v16i16, 26 }, // 2 x 128-bit Op + extract/insert
{ ISD::CTTZ, MVT::v32i8, 20 }, // 2 x 128-bit Op + extract/insert
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
{ ISD::FSQRT, MVT::f32, 14 }, // SNB from http://www.agner.org/
{ ISD::FSQRT, MVT::v4f32, 14 }, // SNB from http://www.agner.org/
{ ISD::FSQRT, MVT::v8f32, 28 }, // SNB from http://www.agner.org/
{ ISD::FSQRT, MVT::f64, 21 }, // SNB from http://www.agner.org/
{ ISD::FSQRT, MVT::v2f64, 21 }, // SNB from http://www.agner.org/
{ ISD::FSQRT, MVT::v4f64, 43 }, // SNB from http://www.agner.org/
};
static const CostTblEntry SSE42CostTbl[] = {
Align cost model columns. NFCI. llvm-svn: 297824
2017-03-15 19:57:42 +08:00
{ ISD::FSQRT, MVT::f32, 18 }, // Nehalem from http://www.agner.org/
{ ISD::FSQRT, MVT::v4f32, 18 }, // Nehalem from http://www.agner.org/
[CostModel][X86][SSE] Updated costs for vector BITREVERSE ops on SSSE3+ targets To account for the fast PSHUFB implementation now available llvm-svn: 272484
2016-06-12 03:23:02 +08:00
};
static const CostTblEntry SSSE3CostTbl[] = {
{ ISD::BITREVERSE, MVT::v2i64, 5 },
{ ISD::BITREVERSE, MVT::v4i32, 5 },
{ ISD::BITREVERSE, MVT::v8i16, 5 },
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
{ ISD::BITREVERSE, MVT::v16i8, 5 },
{ ISD::BSWAP, MVT::v2i64, 1 },
{ ISD::BSWAP, MVT::v4i32, 1 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::BSWAP, MVT::v8i16, 1 },
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
{ ISD::CTLZ, MVT::v2i64, 23 },
{ ISD::CTLZ, MVT::v4i32, 18 },
{ ISD::CTLZ, MVT::v8i16, 14 },
{ ISD::CTLZ, MVT::v16i8, 9 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::CTPOP, MVT::v2i64, 7 },
{ ISD::CTPOP, MVT::v4i32, 11 },
{ ISD::CTPOP, MVT::v8i16, 9 },
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
{ ISD::CTPOP, MVT::v16i8, 6 },
{ ISD::CTTZ, MVT::v2i64, 10 },
{ ISD::CTTZ, MVT::v4i32, 14 },
{ ISD::CTTZ, MVT::v8i16, 12 },
{ ISD::CTTZ, MVT::v16i8, 9 }
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
};
static const CostTblEntry SSE2CostTbl[] = {
[X86] Add missing BITREVERSE costs for SSE2 vectors and i8/i16/i32/i64 scalars Prep work for PR31810 llvm-svn: 297876
2017-03-16 03:34:55 +08:00
{ ISD::BITREVERSE, MVT::v2i64, 29 },
{ ISD::BITREVERSE, MVT::v4i32, 27 },
{ ISD::BITREVERSE, MVT::v8i16, 27 },
{ ISD::BITREVERSE, MVT::v16i8, 20 },
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
{ ISD::BSWAP, MVT::v2i64, 7 },
{ ISD::BSWAP, MVT::v4i32, 7 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::BSWAP, MVT::v8i16, 7 },
[VectorLegalizer] Expansion of CTLZ using CTPOP when possible This patch avoids scalarization of CTLZ by instead expanding to use CTPOP (ref: "Hacker's Delight") when the necessary operations are available. This also adds the necessary cost models for X86 SSE2 targets (the main beneficiary) to ensure vectorization only happens when its useful. Differential Revision: https://reviews.llvm.org/D25910 llvm-svn: 286233
2016-11-08 22:10:28 +08:00
{ ISD::CTLZ, MVT::v2i64, 25 },
{ ISD::CTLZ, MVT::v4i32, 26 },
{ ISD::CTLZ, MVT::v8i16, 20 },
{ ISD::CTLZ, MVT::v16i8, 17 },
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
{ ISD::CTPOP, MVT::v2i64, 12 },
{ ISD::CTPOP, MVT::v4i32, 15 },
{ ISD::CTPOP, MVT::v8i16, 13 },
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
{ ISD::CTPOP, MVT::v16i8, 10 },
{ ISD::CTTZ, MVT::v2i64, 14 },
{ ISD::CTTZ, MVT::v4i32, 18 },
{ ISD::CTTZ, MVT::v8i16, 16 },
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
{ ISD::CTTZ, MVT::v16i8, 13 },
{ ISD::FSQRT, MVT::f64, 32 }, // Nehalem from http://www.agner.org/
{ ISD::FSQRT, MVT::v2f64, 32 }, // Nehalem from http://www.agner.org/
};
static const CostTblEntry SSE1CostTbl[] = {
Align cost model columns. NFCI. llvm-svn: 297824
2017-03-15 19:57:42 +08:00
{ ISD::FSQRT, MVT::f32, 28 }, // Pentium III from http://www.agner.org/
{ ISD::FSQRT, MVT::v4f32, 56 }, // Pentium III from http://www.agner.org/
[CostModel][X86][SSE] Updated costs for vector BITREVERSE ops on SSSE3+ targets To account for the fast PSHUFB implementation now available llvm-svn: 272484
2016-06-12 03:23:02 +08:00
};
[X86] Add missing BITREVERSE costs for SSE2 vectors and i8/i16/i32/i64 scalars Prep work for PR31810 llvm-svn: 297876
2017-03-16 03:34:55 +08:00
static const CostTblEntry X64CostTbl[] = { // 64-bit targets
{ ISD::BITREVERSE, MVT::i64, 14 }
};
static const CostTblEntry X86CostTbl[] = { // 32 or 64-bit targets
{ ISD::BITREVERSE, MVT::i32, 14 },
{ ISD::BITREVERSE, MVT::i16, 14 },
{ ISD::BITREVERSE, MVT::i8, 11 }
};
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
unsigned ISD = ISD::DELETED_NODE;
switch (IID) {
default:
break;
case Intrinsic::bitreverse:
ISD = ISD::BITREVERSE;
break;
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
case Intrinsic::bswap:
ISD = ISD::BSWAP;
break;
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
case Intrinsic::ctlz:
ISD = ISD::CTLZ;
break;
[X86][SSE] Add cost model values for CTPOP of vectors This patch adds costs for the vectorized implementations of CTPOP, the default values were seriously underestimating the cost of these and was encouraging vectorization on targets where serialized use of POPCNT would be much better. Differential Revision: https://reviews.llvm.org/D22456 llvm-svn: 276104
2016-07-20 18:41:28 +08:00
case Intrinsic::ctpop:
ISD = ISD::CTPOP;
break;
[X86][SSE] Add initial costs for vector CTTZ/CTLZ llvm-svn: 277716
2016-08-04 18:51:41 +08:00
case Intrinsic::cttz:
ISD = ISD::CTTZ;
break;
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
case Intrinsic::sqrt:
ISD = ISD::FSQRT;
break;
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
}
// Legalize the type.
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, RetTy);
MVT MTy = LT.second;
// Attempt to lookup cost.
[X86][AVX512] Add 512-bit vector ctlz costs + tests llvm-svn: 303300
2017-05-18 05:02:18 +08:00
if (ST->hasCDI())
if (const auto *Entry = CostTableLookup(AVX512CDCostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[X86][AVX512] Add 512-bit vector bitreverse costs + tests llvm-svn: 303283
2017-05-18 03:20:20 +08:00
if (ST->hasBWI())
if (const auto *Entry = CostTableLookup(AVX512BWCostTbl, ISD, MTy))
return LT.first * Entry->Cost;
if (ST->hasAVX512())
if (const auto *Entry = CostTableLookup(AVX512CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
if (ST->hasXOP())
if (const auto *Entry = CostTableLookup(XOPCostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[CostModel][X86][SSE] Updated costs for vector BITREVERSE ops on SSSE3+ targets To account for the fast PSHUFB implementation now available llvm-svn: 272484
2016-06-12 03:23:02 +08:00
if (ST->hasAVX2())
if (const auto *Entry = CostTableLookup(AVX2CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
if (ST->hasAVX())
if (const auto *Entry = CostTableLookup(AVX1CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
if (ST->hasSSE42())
if (const auto *Entry = CostTableLookup(SSE42CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[CostModel][X86][SSE] Updated costs for vector BITREVERSE ops on SSSE3+ targets To account for the fast PSHUFB implementation now available llvm-svn: 272484
2016-06-12 03:23:02 +08:00
if (ST->hasSSSE3())
if (const auto *Entry = CostTableLookup(SSSE3CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[X86][SSE] Add cost model for BSWAP of vectors The BSWAP of vector types is quite efficiently implemented using vector shuffles on SSE/AVX targets, we should reflect the typical cost of this to encourage vectorization. Differential Revision: http://reviews.llvm.org/D21521 llvm-svn: 273217
2016-06-21 07:08:21 +08:00
if (ST->hasSSE2())
if (const auto *Entry = CostTableLookup(SSE2CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
Improved cost model for FDIV and FSQRT, by Andrew Tischenko There is a bug describing poor cost model for floating point operations: Bug 29083 - [X86][SSE] Improve costs for floating point operations. This patch is the second one in series of patches dealing with cost model. Differential Revision: https://reviews.llvm.org/D25722 llvm-svn: 285564
2016-10-31 20:10:53 +08:00
if (ST->hasSSE1())
if (const auto *Entry = CostTableLookup(SSE1CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[X86] Add missing BITREVERSE costs for SSE2 vectors and i8/i16/i32/i64 scalars Prep work for PR31810 llvm-svn: 297876
2017-03-16 03:34:55 +08:00
if (ST->is64Bit())
if (const auto *Entry = CostTableLookup(X64CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
if (const auto *Entry = CostTableLookup(X86CostTbl, ISD, MTy))
return LT.first * Entry->Cost;
[TargetTransformInfo] getIntrinsicInstrCost() scalarization estimation improved getIntrinsicInstrCost() used to only compute scalarization cost based on types. This patch improves this so that the actual arguments are checked when they are available, in order to handle only unique non-constant operands. Tests updates: Analysis/CostModel/X86/arith-fp.ll Transforms/LoopVectorize/AArch64/interleaved_cost.ll Transforms/LoopVectorize/ARM/interleaved_cost.ll The improvement in getOperandsScalarizationOverhead() to differentiate on constants made it necessary to update the interleaved_cost.ll tests even though they do not relate to intrinsics. Review: Hal Finkel https://reviews.llvm.org/D29540 llvm-svn: 297705
2017-03-14 14:35:36 +08:00
return BaseT::getIntrinsicInstrCost(IID, RetTy, Tys, FMF, ScalarizationCostPassed);
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
}
int X86TTIImpl::getIntrinsicInstrCost(Intrinsic::ID IID, Type *RetTy,
[TargetTransformInfo] getIntrinsicInstrCost() scalarization estimation improved getIntrinsicInstrCost() used to only compute scalarization cost based on types. This patch improves this so that the actual arguments are checked when they are available, in order to handle only unique non-constant operands. Tests updates: Analysis/CostModel/X86/arith-fp.ll Transforms/LoopVectorize/AArch64/interleaved_cost.ll Transforms/LoopVectorize/ARM/interleaved_cost.ll The improvement in getOperandsScalarizationOverhead() to differentiate on constants made it necessary to update the interleaved_cost.ll tests even though they do not relate to intrinsics. Review: Hal Finkel https://reviews.llvm.org/D29540 llvm-svn: 297705
2017-03-14 14:35:36 +08:00
ArrayRef<Value *> Args, FastMathFlags FMF, unsigned VF) {
return BaseT::getIntrinsicInstrCost(IID, RetTy, Args, FMF, VF);
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index) {
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
assert(Val->isVectorTy() && "This must be a vector type");
[x86] avoid code explosion from LoopVectorizer for gather loop (PR27826) By making pointer extraction from a vector more expensive in the cost model, we avoid the vectorization of a loop that is very likely to be memory-bound: https://llvm.org/bugs/show_bug.cgi?id=27826 There are still bugs related to this, so we may need a more general solution to avoid vectorizing obviously memory-bound loops when we don't have HW gather support. Differential Revision: http://reviews.llvm.org/D20601 llvm-svn: 270729
2016-05-26 01:27:54 +08:00
Type *ScalarType = Val->getScalarType();
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
if (Index != -1U) {
// Legalize the type.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, Val);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
// This type is legalized to a scalar type.
if (!LT.second.isVector())
return 0;
// The type may be split. Normalize the index to the new type.
unsigned Width = LT.second.getVectorNumElements();
Index = Index % Width;
// Floating point scalars are already located in index #0.
[x86] avoid code explosion from LoopVectorizer for gather loop (PR27826) By making pointer extraction from a vector more expensive in the cost model, we avoid the vectorization of a loop that is very likely to be memory-bound: https://llvm.org/bugs/show_bug.cgi?id=27826 There are still bugs related to this, so we may need a more general solution to avoid vectorizing obviously memory-bound loops when we don't have HW gather support. Differential Revision: http://reviews.llvm.org/D20601 llvm-svn: 270729
2016-05-26 01:27:54 +08:00
if (ScalarType->isFloatingPointTy() && Index == 0)
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
return 0;
}
[x86] avoid code explosion from LoopVectorizer for gather loop (PR27826) By making pointer extraction from a vector more expensive in the cost model, we avoid the vectorization of a loop that is very likely to be memory-bound: https://llvm.org/bugs/show_bug.cgi?id=27826 There are still bugs related to this, so we may need a more general solution to avoid vectorizing obviously memory-bound loops when we don't have HW gather support. Differential Revision: http://reviews.llvm.org/D20601 llvm-svn: 270729
2016-05-26 01:27:54 +08:00
// Add to the base cost if we know that the extracted element of a vector is
// destined to be moved to and used in the integer register file.
int RegisterFileMoveCost = 0;
if (Opcode == Instruction::ExtractElement && ScalarType->isPointerTy())
RegisterFileMoveCost = 1;
return BaseT::getVectorInstrCost(Opcode, Val, Index) + RegisterFileMoveCost;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
[SystemZ] TargetTransformInfo cost functions implemented. getArithmeticInstrCost(), getShuffleCost(), getCastInstrCost(), getCmpSelInstrCost(), getVectorInstrCost(), getMemoryOpCost(), getInterleavedMemoryOpCost() implemented. Interleaved access vectorization enabled. BasicTTIImpl::getCastInstrCost() improved to check for legal extending loads, in which case the cost of the z/sext instruction becomes 0. Review: Ulrich Weigand, Renato Golin. https://reviews.llvm.org/D29631 llvm-svn: 300052
2017-04-12 19:49:08 +08:00
unsigned AddressSpace, const Instruction *I) {
Correct word hyphenations This patch tries to avoid unrelated changes other than fixing a few hyphen-related ambiguities and contractions in nearby lines. llvm-svn: 196471
2013-12-05 13:44:44 +08:00
// Handle non-power-of-two vectors such as <3 x float>
CostModel: improve the cost model for load/store of non power-of-two types such as <3 x float>, which are popular in graphics. llvm-svn: 185085
2013-06-28 01:52:04 +08:00
if (VectorType *VTy = dyn_cast<VectorType>(Src)) {
unsigned NumElem = VTy->getVectorNumElements();
// Handle a few common cases:
// <3 x float>
if (NumElem == 3 && VTy->getScalarSizeInBits() == 32)
// Cost = 64 bit store + extract + 32 bit store.
return 3;
// <3 x double>
if (NumElem == 3 && VTy->getScalarSizeInBits() == 64)
// Cost = 128 bit store + unpack + 64 bit store.
return 3;
Correct word hyphenations This patch tries to avoid unrelated changes other than fixing a few hyphen-related ambiguities and contractions in nearby lines. llvm-svn: 196471
2013-12-05 13:44:44 +08:00
// Assume that all other non-power-of-two numbers are scalarized.
CostModel: improve the cost model for load/store of non power-of-two types such as <3 x float>, which are popular in graphics. llvm-svn: 185085
2013-06-28 01:52:04 +08:00
if (!isPowerOf2_32(NumElem)) {
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int Cost = BaseT::getMemoryOpCost(Opcode, VTy->getScalarType(), Alignment,
AddressSpace);
int SplitCost = getScalarizationOverhead(Src, Opcode == Instruction::Load,
Opcode == Instruction::Store);
CostModel: improve the cost model for load/store of non power-of-two types such as <3 x float>, which are popular in graphics. llvm-svn: 185085
2013-06-28 01:52:04 +08:00
return NumElem * Cost + SplitCost;
}
}
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
// Legalize the type.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, Src);
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
assert((Opcode == Instruction::Load || Opcode == Instruction::Store) &&
"Invalid Opcode");
// Each load/store unit costs 1.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int Cost = LT.first * 1;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
[x86] fix cost model inaccuracy for vector memory ops The irony of this patch is that one CPU that is affected is AMD Jaguar, and Jaguar has a completely double-pumped AVX implementation. But getting the cost model to reflect that is a much bigger problem. The small goal here is simply to improve on the lie that !AVX2 == SandyBridge. Differential Revision: http://reviews.llvm.org/D18000 llvm-svn: 263069
2016-03-10 06:23:33 +08:00
// This isn't exactly right. We're using slow unaligned 32-byte accesses as a
// proxy for a double-pumped AVX memory interface such as on Sandybridge.
if (LT.second.getStoreSize() == 32 && ST->isUnalignedMem32Slow())
Cost *= 2;
Switch TargetTransformInfo from an immutable analysis pass that requires a TargetMachine to construct (and thus isn't always available), to an analysis group that supports layered implementations much like AliasAnalysis does. This is a pretty massive change, with a few parts that I was unable to easily separate (sorry), so I'll walk through it. The first step of this conversion was to make TargetTransformInfo an analysis group, and to sink the nonce implementations in ScalarTargetTransformInfo and VectorTargetTranformInfo into a NoTargetTransformInfo pass. This allows other passes to add a hard requirement on TTI, and assume they will always get at least on implementation. The TargetTransformInfo analysis group leverages the delegation chaining trick that AliasAnalysis uses, where the base class for the analysis group delegates to the previous analysis *pass*, allowing all but tho NoFoo analysis passes to only implement the parts of the interfaces they support. It also introduces a new trick where each pass in the group retains a pointer to the top-most pass that has been initialized. This allows passes to implement one API in terms of another API and benefit when some other pass above them in the stack has more precise results for the second API. The second step of this conversion is to create a pass that implements the TargetTransformInfo analysis using the target-independent abstractions in the code generator. This replaces the ScalarTargetTransformImpl and VectorTargetTransformImpl classes in lib/Target with a single pass in lib/CodeGen called BasicTargetTransformInfo. This class actually provides most of the TTI functionality, basing it upon the TargetLowering abstraction and other information in the target independent code generator. The third step of the conversion adds support to all TargetMachines to register custom analysis passes. This allows building those passes with access to TargetLowering or other target-specific classes, and it also allows each target to customize the set of analysis passes desired in the pass manager. The baseline LLVMTargetMachine implements this interface to add the BasicTTI pass to the pass manager, and all of the tools that want to support target-aware TTI passes call this routine on whatever target machine they end up with to add the appropriate passes. The fourth step of the conversion created target-specific TTI analysis passes for the X86 and ARM backends. These passes contain the custom logic that was previously in their extensions of the ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces. I separated them into their own file, as now all of the interface bits are private and they just expose a function to create the pass itself. Then I extended these target machines to set up a custom set of analysis passes, first adding BasicTTI as a fallback, and then adding their customized TTI implementations. The fourth step required logic that was shared between the target independent layer and the specific targets to move to a different interface, as they no longer derive from each other. As a consequence, a helper functions were added to TargetLowering representing the common logic needed both in the target implementation and the codegen implementation of the TTI pass. While technically this is the only change that could have been committed separately, it would have been a nightmare to extract. The final step of the conversion was just to delete all the old boilerplate. This got rid of the ScalarTargetTransformInfo and VectorTargetTransformInfo classes, all of the support in all of the targets for producing instances of them, and all of the support in the tools for manually constructing a pass based around them. Now that TTI is a relatively normal analysis group, two things become straightforward. First, we can sink it into lib/Analysis which is a more natural layer for it to live. Second, clients of this interface can depend on it *always* being available which will simplify their code and behavior. These (and other) simplifications will follow in subsequent commits, this one is clearly big enough. Finally, I'm very aware that much of the comments and documentation needs to be updated. As soon as I had this working, and plausibly well commented, I wanted to get it committed and in front of the build bots. I'll be doing a few passes over documentation later if it sticks. Commits to update DragonEgg and Clang will be made presently. llvm-svn: 171681
2013-01-07 09:37:14 +08:00
return Cost;
}
X86 cost model: Add cost for vectorized gather/scather radar://14351991 llvm-svn: 186189
2013-07-13 03:16:07 +08:00
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getMaskedMemoryOpCost(unsigned Opcode, Type *SrcTy,
unsigned Alignment,
unsigned AddressSpace) {
Implemented cost model for masked load/store operations. llvm-svn: 227035
2015-01-25 16:44:46 +08:00
VectorType *SrcVTy = dyn_cast<VectorType>(SrcTy);
if (!SrcVTy)
// To calculate scalar take the regular cost, without mask
return getMemoryOpCost(Opcode, SrcTy, Alignment, AddressSpace);
unsigned NumElem = SrcVTy->getVectorNumElements();
VectorType *MaskTy =
Do not use getGlobalContext()... ever. This code was creating a new type in the global context, regardless of which context the user is sitting in, what can possibly go wrong? From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266275
2016-04-14 12:36:40 +08:00
VectorType::get(Type::getInt8Ty(SrcVTy->getContext()), NumElem);
Removed parameter "Consecutive" from isLegalMaskedLoad() / isLegalMaskedStore(). Originally I planned to use the same interface for masked gather/scatter and set isConsecutive to "false" in this case. Now I'm implementing masked gather/scatter and see that the interface is inconvenient. I want to add interfaces isLegalMaskedGather() / isLegalMaskedScatter() instead of using the "Consecutive" parameter in the existing interfaces. Differential Revision: http://reviews.llvm.org/D13850 llvm-svn: 250686
2015-10-19 15:43:38 +08:00
if ((Opcode == Instruction::Load && !isLegalMaskedLoad(SrcVTy)) ||
(Opcode == Instruction::Store && !isLegalMaskedStore(SrcVTy)) ||
Implemented cost model for masked load/store operations. llvm-svn: 227035
2015-01-25 16:44:46 +08:00
!isPowerOf2_32(NumElem)) {
// Scalarization
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int MaskSplitCost = getScalarizationOverhead(MaskTy, false, true);
int ScalarCompareCost = getCmpSelInstrCost(
Do not use getGlobalContext()... ever. This code was creating a new type in the global context, regardless of which context the user is sitting in, what can possibly go wrong? From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266275
2016-04-14 12:36:40 +08:00
Instruction::ICmp, Type::getInt8Ty(SrcVTy->getContext()), nullptr);
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int BranchCost = getCFInstrCost(Instruction::Br);
int MaskCmpCost = NumElem * (BranchCost + ScalarCompareCost);
int ValueSplitCost = getScalarizationOverhead(
SrcVTy, Opcode == Instruction::Load, Opcode == Instruction::Store);
int MemopCost =
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
NumElem * BaseT::getMemoryOpCost(Opcode, SrcVTy->getScalarType(),
Alignment, AddressSpace);
Implemented cost model for masked load/store operations. llvm-svn: 227035
2015-01-25 16:44:46 +08:00
return MemopCost + ValueSplitCost + MaskSplitCost + MaskCmpCost;
}
// Legalize the type.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, SrcVTy);
[X86] A small fix in X86/X86TargetTransformInfo.cpp: check a value type is simple before calling getSimpleVT(). llvm-svn: 251538
2015-10-29 02:15:46 +08:00
auto VT = TLI->getValueType(DL, SrcVTy);
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int Cost = 0;
[X86] A small fix in X86/X86TargetTransformInfo.cpp: check a value type is simple before calling getSimpleVT(). llvm-svn: 251538
2015-10-29 02:15:46 +08:00
if (VT.isSimple() && LT.second != VT.getSimpleVT() &&
Implemented cost model for masked load/store operations. llvm-svn: 227035
2015-01-25 16:44:46 +08:00
LT.second.getVectorNumElements() == NumElem)
// Promotion requires expand/truncate for data and a shuffle for mask.
Fix Clang-tidy modernize-use-nullptr warnings in source directories and generated files; other minor cleanups. Patch by Eugene Zelenko! Differential Revision: http://reviews.llvm.org/D13321 llvm-svn: 249482
2015-10-07 07:24:35 +08:00
Cost += getShuffleCost(TTI::SK_Alternate, SrcVTy, 0, nullptr) +
getShuffleCost(TTI::SK_Alternate, MaskTy, 0, nullptr);
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
Implemented cost model for masked load/store operations. llvm-svn: 227035
2015-01-25 16:44:46 +08:00
else if (LT.second.getVectorNumElements() > NumElem) {
VectorType *NewMaskTy = VectorType::get(MaskTy->getVectorElementType(),
LT.second.getVectorNumElements());
// Expanding requires fill mask with zeroes
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
Cost += getShuffleCost(TTI::SK_InsertSubvector, NewMaskTy, 0, MaskTy);
Implemented cost model for masked load/store operations. llvm-svn: 227035
2015-01-25 16:44:46 +08:00
}
if (!ST->hasAVX512())
return Cost + LT.first*4; // Each maskmov costs 4
// AVX-512 masked load/store is cheapper
return Cost+LT.first;
}
Currently isLikelyComplexAddressComputation tries to figure out if the given stride seems to be 'complex' and need some extra cost for address computation handling. This code seems to be target dependent which may not be the same for all targets. Passed the decision whether the given stride is complex or not to the target by sending stride information via SCEV to getAddressComputationCost instead of 'IsComplex'. Specifically at X86 targets we dont see any significant address computation cost in case of the strided access in general. Differential Revision: https://reviews.llvm.org/D27518 llvm-svn: 291106
2017-01-05 22:03:41 +08:00
int X86TTIImpl::getAddressComputationCost(Type *Ty, ScalarEvolution *SE,
const SCEV *Ptr) {
X86 cost model: Add cost for vectorized gather/scather radar://14351991 llvm-svn: 186189
2013-07-13 03:16:07 +08:00
// Address computations in vectorized code with non-consecutive addresses will
// likely result in more instructions compared to scalar code where the
// computation can more often be merged into the index mode. The resulting
// extra micro-ops can significantly decrease throughput.
unsigned NumVectorInstToHideOverhead = 10;
Currently isLikelyComplexAddressComputation tries to figure out if the given stride seems to be 'complex' and need some extra cost for address computation handling. This code seems to be target dependent which may not be the same for all targets. Passed the decision whether the given stride is complex or not to the target by sending stride information via SCEV to getAddressComputationCost instead of 'IsComplex'. Specifically at X86 targets we dont see any significant address computation cost in case of the strided access in general. Differential Revision: https://reviews.llvm.org/D27518 llvm-svn: 291106
2017-01-05 22:03:41 +08:00
// Cost modeling of Strided Access Computation is hidden by the indexing
// modes of X86 regardless of the stride value. We dont believe that there
// is a difference between constant strided access in gerenal and constant
// strided value which is less than or equal to 64.
// Even in the case of (loop invariant) stride whose value is not known at
// compile time, the address computation will not incur more than one extra
// ADD instruction.
if (Ty->isVectorTy() && SE) {
if (!BaseT::isStridedAccess(Ptr))
return NumVectorInstToHideOverhead;
if (!BaseT::getConstantStrideStep(SE, Ptr))
return 1;
}
X86 cost model: Add cost for vectorized gather/scather radar://14351991 llvm-svn: 186189
2013-07-13 03:16:07 +08:00
Currently isLikelyComplexAddressComputation tries to figure out if the given stride seems to be 'complex' and need some extra cost for address computation handling. This code seems to be target dependent which may not be the same for all targets. Passed the decision whether the given stride is complex or not to the target by sending stride information via SCEV to getAddressComputationCost instead of 'IsComplex'. Specifically at X86 targets we dont see any significant address computation cost in case of the strided access in general. Differential Revision: https://reviews.llvm.org/D27518 llvm-svn: 291106
2017-01-05 22:03:41 +08:00
return BaseT::getAddressComputationCost(Ty, SE, Ptr);
X86 cost model: Add cost for vectorized gather/scather radar://14351991 llvm-svn: 186189
2013-07-13 03:16:07 +08:00
}
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
[Cost] Rename getReductionCost() to getArithmeticReductionCost(), NFC. llvm-svn: 309563
2017-07-31 22:19:32 +08:00
int X86TTIImpl::getArithmeticReductionCost(unsigned Opcode, Type *ValTy,
bool IsPairwise) {
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
std::pair<int, MVT> LT = TLI->getTypeLegalizationCost(DL, ValTy);
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
MVT MTy = LT.second;
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
int ISD = TLI->InstructionOpcodeToISD(Opcode);
assert(ISD && "Invalid opcode");
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
// We use the Intel Architecture Code Analyzer(IACA) to measure the throughput
// and make it as the cost.
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry SSE42CostTblPairWise[] = {
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
{ ISD::FADD, MVT::v2f64, 2 },
{ ISD::FADD, MVT::v4f32, 4 },
{ ISD::ADD, MVT::v2i64, 2 }, // The data reported by the IACA tool is "1.6".
{ ISD::ADD, MVT::v4i32, 3 }, // The data reported by the IACA tool is "3.5".
{ ISD::ADD, MVT::v8i16, 5 },
};
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX1CostTblPairWise[] = {
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
{ ISD::FADD, MVT::v4f32, 4 },
{ ISD::FADD, MVT::v4f64, 5 },
{ ISD::FADD, MVT::v8f32, 7 },
{ ISD::ADD, MVT::v2i64, 1 }, // The data reported by the IACA tool is "1.5".
{ ISD::ADD, MVT::v4i32, 3 }, // The data reported by the IACA tool is "3.5".
{ ISD::ADD, MVT::v4i64, 5 }, // The data reported by the IACA tool is "4.8".
{ ISD::ADD, MVT::v8i16, 5 },
{ ISD::ADD, MVT::v8i32, 5 },
};
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry SSE42CostTblNoPairWise[] = {
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
{ ISD::FADD, MVT::v2f64, 2 },
{ ISD::FADD, MVT::v4f32, 4 },
{ ISD::ADD, MVT::v2i64, 2 }, // The data reported by the IACA tool is "1.6".
{ ISD::ADD, MVT::v4i32, 3 }, // The data reported by the IACA tool is "3.3".
{ ISD::ADD, MVT::v8i16, 4 }, // The data reported by the IACA tool is "4.3".
};
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
Remove templates from CostTableLookup functions. All instantiations had the same type. This also lets us remove the versions of the functions that took a statically sized array as we can rely on ArrayRef implicit conversion now. llvm-svn: 251490
2015-10-28 12:02:12 +08:00
static const CostTblEntry AVX1CostTblNoPairWise[] = {
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
{ ISD::FADD, MVT::v4f32, 3 },
{ ISD::FADD, MVT::v4f64, 3 },
{ ISD::FADD, MVT::v8f32, 4 },
{ ISD::ADD, MVT::v2i64, 1 }, // The data reported by the IACA tool is "1.5".
{ ISD::ADD, MVT::v4i32, 3 }, // The data reported by the IACA tool is "2.8".
{ ISD::ADD, MVT::v4i64, 3 },
{ ISD::ADD, MVT::v8i16, 4 },
{ ISD::ADD, MVT::v8i32, 5 },
};
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
if (IsPairwise) {
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasAVX())
if (const auto *Entry = CostTableLookup(AVX1CostTblPairWise, ISD, MTy))
return LT.first * Entry->Cost;
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasSSE42())
if (const auto *Entry = CostTableLookup(SSE42CostTblPairWise, ISD, MTy))
return LT.first * Entry->Cost;
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
} else {
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasAVX())
if (const auto *Entry = CostTableLookup(AVX1CostTblNoPairWise, ISD, MTy))
return LT.first * Entry->Cost;
[X86] Clean up whitespace as well as minor coding style llvm-svn: 223339
2014-12-04 13:20:33 +08:00
Convert cost table lookup functions to return a pointer to the entry or nullptr instead of the index. This avoid mentioning the table name an extra time and allows the lookup to be done directly in the ifs by relying on the bool conversion of the pointer. While there make use of ArrayRef and std::find_if. llvm-svn: 251382
2015-10-27 12:14:24 +08:00
if (ST->hasSSE42())
if (const auto *Entry = CostTableLookup(SSE42CostTblNoPairWise, ISD, MTy))
return LT.first * Entry->Cost;
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
}
[Cost] Rename getReductionCost() to getArithmeticReductionCost(), NFC. llvm-svn: 309563
2017-07-31 22:19:32 +08:00
return BaseT::getArithmeticReductionCost(Opcode, ValTy, IsPairwise);
X86 horizontal vector reduction cost model llvm-svn: 191021
2013-09-20 01:48:48 +08:00
}
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
/// \brief Calculate the cost of materializing a 64-bit value. This helper
/// method might only calculate a fraction of a larger immediate. Therefore it
/// is valid to return a cost of ZERO.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getIntImmCost(int64_t Val) {
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
if (Val == 0)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
if (isInt<32>(Val))
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Basic;
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return 2 * TTI::TCC_Basic;
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getIntImmCost(const APInt &Imm, Type *Ty) {
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
assert(Ty->isIntegerTy());
unsigned BitSize = Ty->getPrimitiveSizeInBits();
if (BitSize == 0)
return ~0U;
[ConstantHoisting][X86] Change the cost model to never hoist constants for types larger than i128. Currently the X86 backend doesn't support types larger than i128 very well. For example an i192 multiply will assert in codegen when the 2nd argument is a constant and the constant got hoisted. This fix changes the cost model to never hoist constants for types larger than i128. Once the codegen issues have been resolved, the cost model can be updated to allow also larger types. This is related to <rdar://problem/16954938> llvm-svn: 209162
2014-05-20 05:00:53 +08:00
// Never hoist constants larger than 128bit, because this might lead to
// incorrect code generation or assertions in codegen.
// Fixme: Create a cost model for types larger than i128 once the codegen
// issues have been fixed.
if (BitSize > 128)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[ConstantHoisting][X86] Change the cost model to never hoist constants for types larger than i128. Currently the X86 backend doesn't support types larger than i128 very well. For example an i192 multiply will assert in codegen when the 2nd argument is a constant and the constant got hoisted. This fix changes the cost model to never hoist constants for types larger than i128. Once the codegen issues have been resolved, the cost model can be updated to allow also larger types. This is related to <rdar://problem/16954938> llvm-svn: 209162
2014-05-20 05:00:53 +08:00
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
if (Imm == 0)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
// Sign-extend all constants to a multiple of 64-bit.
APInt ImmVal = Imm;
if (BitSize & 0x3f)
ImmVal = Imm.sext((BitSize + 63) & ~0x3fU);
// Split the constant into 64-bit chunks and calculate the cost for each
// chunk.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int Cost = 0;
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
for (unsigned ShiftVal = 0; ShiftVal < BitSize; ShiftVal += 64) {
APInt Tmp = ImmVal.ashr(ShiftVal).sextOrTrunc(64);
int64_t Val = Tmp.getSExtValue();
Cost += getIntImmCost(Val);
}
fix typo; NFC llvm-svn: 265442
2016-04-06 03:27:39 +08:00
// We need at least one instruction to materialize the constant.
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
return std::max(1, Cost);
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getIntImmCost(unsigned Opcode, unsigned Idx, const APInt &Imm,
Type *Ty) {
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
assert(Ty->isIntegerTy());
unsigned BitSize = Ty->getPrimitiveSizeInBits();
[ConstantHoisting][X86] Change the cost model to never hoist constants for types larger than i128. Currently the X86 backend doesn't support types larger than i128 very well. For example an i192 multiply will assert in codegen when the 2nd argument is a constant and the constant got hoisted. This fix changes the cost model to never hoist constants for types larger than i128. Once the codegen issues have been resolved, the cost model can be updated to allow also larger types. This is related to <rdar://problem/16954938> llvm-svn: 209162
2014-05-20 05:00:53 +08:00
// There is no cost model for constants with a bit size of 0. Return TCC_Free
// here, so that constant hoisting will ignore this constant.
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
if (BitSize == 0)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
unsigned ImmIdx = ~0U;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
switch (Opcode) {
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
default:
return TTI::TCC_Free;
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
case Instruction::GetElementPtr:
Add comments and test case for [X86TTI] Make constant base pointers for GetElementPtr opaque (r204739). llvm-svn: 205468
2014-04-03 05:45:36 +08:00
// Always hoist the base address of a GetElementPtr. This prevents the
// creation of new constants for every base constant that gets constant
// folded with the offset.
[X86TTI] Make constant base pointers for getElementPtr opaque. If getElementPtr uses a constant as base pointer, then make the constant opaque. This prevents constant folding it with the offset. The offset can usually be encoded in the load/store instruction itself and the base address doesn't have to be rematerialized several times. llvm-svn: 204739
2014-03-26 02:01:25 +08:00
if (Idx == 0)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return 2 * TTI::TCC_Basic;
return TTI::TCC_Free;
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
case Instruction::Store:
ImmIdx = 0;
break;
[X86] Prevent constant hoisting for a couple compare immediates that the selection DAG knows how to optimize into a shift. This allows "icmp ugt %a, 4294967295" and "icmp uge %a, 4294967296" to be optimized into right shifts by 32 which can fold the immediate into the shift instruction. These patterns show up with some regularity in real code. Unfortunately, since getImmCost can't see the icmp predicate we can't be tell if we're only catching these specific cases. llvm-svn: 256126
2015-12-21 02:41:54 +08:00
case Instruction::ICmp:
// This is an imperfect hack to prevent constant hoisting of
// compares that might be trying to check if a 64-bit value fits in
// 32-bits. The backend can optimize these cases using a right shift by 32.
// Ideally we would check the compare predicate here. There also other
// similar immediates the backend can use shifts for.
if (Idx == 1 && Imm.getBitWidth() == 64) {
uint64_t ImmVal = Imm.getZExtValue();
if (ImmVal == 0x100000000ULL || ImmVal == 0xffffffff)
return TTI::TCC_Free;
}
ImmIdx = 1;
break;
[X86] Teach constant hoisting that ANDs with 64-bit immediates in the range 0x80000000-0xffffffff can be handled cheaply and don't need to be hoisted. Most importantly, this keeps constant hoisting from preventing instruction selections ability to turn an AND with 0xffffffff into a move into a 32-bit subregister. llvm-svn: 249370
2015-10-06 10:50:24 +08:00
case Instruction::And:
// We support 64-bit ANDs with immediates with 32-bits of leading zeroes
// by using a 32-bit operation with implicit zero extension. Detect such
// immediates here as the normal path expects bit 31 to be sign extended.
if (Idx == 1 && Imm.getBitWidth() == 64 && isUInt<32>(Imm.getZExtValue()))
return TTI::TCC_Free;
Replace "fallthrough" comments with LLVM_FALLTHROUGH This is a mechanical change of comments in switches like fallthrough, fall-through, or fall-thru to use the LLVM_FALLTHROUGH macro instead. llvm-svn: 278902
2016-08-17 13:10:15 +08:00
LLVM_FALLTHROUGH;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
case Instruction::Add:
case Instruction::Sub:
case Instruction::Mul:
case Instruction::UDiv:
case Instruction::SDiv:
case Instruction::URem:
case Instruction::SRem:
case Instruction::Or:
case Instruction::Xor:
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
ImmIdx = 1;
break;
[X86] Never hoist the shift value of a shift instruction. There is no need to check if we want to hoist the immediate value of an shift instruction. Simply return TCC_Free right away. This change is like r206101, but for X86. rdar://problem/16190769 llvm-svn: 207692
2014-05-01 03:17:32 +08:00
// Always return TCC_Free for the shift value of a shift instruction.
case Instruction::Shl:
case Instruction::LShr:
case Instruction::AShr:
if (Idx == 1)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[X86] Never hoist the shift value of a shift instruction. There is no need to check if we want to hoist the immediate value of an shift instruction. Simply return TCC_Free right away. This change is like r206101, but for X86. rdar://problem/16190769 llvm-svn: 207692
2014-05-01 03:17:32 +08:00
break;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
case Instruction::Trunc:
case Instruction::ZExt:
case Instruction::SExt:
case Instruction::IntToPtr:
case Instruction::PtrToInt:
case Instruction::BitCast:
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
case Instruction::PHI:
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
case Instruction::Call:
case Instruction::Select:
case Instruction::Ret:
case Instruction::Load:
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
break;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
}
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
if (Idx == ImmIdx) {
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int NumConstants = (BitSize + 63) / 64;
int Cost = X86TTIImpl::getIntImmCost(Imm, Ty);
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return (Cost <= NumConstants * TTI::TCC_Basic)
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
? static_cast<int>(TTI::TCC_Free)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
: Cost;
[ConstantHoisting][X86] Improve the cost model for small constants with large types (i64 and above). This improves the X86 cost model for small constants with large types. Before this commit we would even hoist trivial constants such as i96 2. This is related to <rdar://problem/17070936> llvm-svn: 210504
2014-06-10 08:32:29 +08:00
}
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return X86TTIImpl::getIntImmCost(Imm, Ty);
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
}
[TTI] Make the cost APIs in TargetTransformInfo consistently use 'int' rather than 'unsigned' for their costs. For something like costs in particular there is a natural "negative" value, that of savings or saved cost. As a consequence, there is a lot of code that subtracts or creates negative values based on cost, all of which is prone to awkwardness or bugs when dealing with an unsigned type. Similarly, we *never* want these values to wrap, as that would cause Very Bad code generation (likely percieved as an infinite loop as we try to emit over 2^32 instructions or some such insanity). All around 'int' seems a much better fit for these basic metrics. I've added asserts to ensure that at least the TTI interface never returns negative numbers here. If we ever have a use case for negative numbers, we can remove this, but this way a bug where someone used '-1' to produce a 'very large' cost will be caught by the assert. This passes all tests, and is also UBSan clean. No functional change intended. Differential Revision: http://reviews.llvm.org/D11741 llvm-svn: 244080
2015-08-06 02:08:10 +08:00
int X86TTIImpl::getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
Type *Ty) {
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
assert(Ty->isIntegerTy());
unsigned BitSize = Ty->getPrimitiveSizeInBits();
[ConstantHoisting][X86] Change the cost model to never hoist constants for types larger than i128. Currently the X86 backend doesn't support types larger than i128 very well. For example an i192 multiply will assert in codegen when the 2nd argument is a constant and the constant got hoisted. This fix changes the cost model to never hoist constants for types larger than i128. Once the codegen issues have been resolved, the cost model can be updated to allow also larger types. This is related to <rdar://problem/16954938> llvm-svn: 209162
2014-05-20 05:00:53 +08:00
// There is no cost model for constants with a bit size of 0. Return TCC_Free
// here, so that constant hoisting will ignore this constant.
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
if (BitSize == 0)
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
switch (IID) {
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
default:
return TTI::TCC_Free;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
case Intrinsic::sadd_with_overflow:
case Intrinsic::uadd_with_overflow:
case Intrinsic::ssub_with_overflow:
case Intrinsic::usub_with_overflow:
case Intrinsic::smul_with_overflow:
case Intrinsic::umul_with_overflow:
[Constant Hoisting] Make the constant materialization cost operand dependent Extend the target hook to take also the operand index into account when calculating the cost of the constant materialization. Related to <rdar://problem/16381500> llvm-svn: 204435
2014-03-21 14:04:45 +08:00
if ((Idx == 1) && Imm.getBitWidth() <= 64 && isInt<32>(Imm.getSExtValue()))
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[Stackmaps][X86TTI] Fix think-o in getIntImmCost calculation. The cost for the first four stackmap operands was always TCC_Free. This is only true for the first two operands. All other operands are TCC_Free if they are within 64bit. llvm-svn: 204738
2014-03-26 02:01:23 +08:00
break;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
case Intrinsic::experimental_stackmap:
[Stackmaps][X86TTI] Fix think-o in getIntImmCost calculation. The cost for the first four stackmap operands was always TCC_Free. This is only true for the first two operands. All other operands are TCC_Free if they are within 64bit. llvm-svn: 204738
2014-03-26 02:01:23 +08:00
if ((Idx < 2) || (Imm.getBitWidth() <= 64 && isInt<64>(Imm.getSExtValue())))
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[Stackmaps][X86TTI] Fix think-o in getIntImmCost calculation. The cost for the first four stackmap operands was always TCC_Free. This is only true for the first two operands. All other operands are TCC_Free if they are within 64bit. llvm-svn: 204738
2014-03-26 02:01:23 +08:00
break;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
case Intrinsic::experimental_patchpoint_void:
case Intrinsic::experimental_patchpoint_i64:
[Stackmaps][X86TTI] Fix think-o in getIntImmCost calculation. The cost for the first four stackmap operands was always TCC_Free. This is only true for the first two operands. All other operands are TCC_Free if they are within 64bit. llvm-svn: 204738
2014-03-26 02:01:23 +08:00
if ((Idx < 4) || (Imm.getBitWidth() <= 64 && isInt<64>(Imm.getSExtValue())))
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return TTI::TCC_Free;
[Stackmaps][X86TTI] Fix think-o in getIntImmCost calculation. The cost for the first four stackmap operands was always TCC_Free. This is only true for the first two operands. All other operands are TCC_Free if they are within 64bit. llvm-svn: 204738
2014-03-26 02:01:23 +08:00
break;
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
}
[PM] Change the core design of the TTI analysis to use a polymorphic type erased interface and a single analysis pass rather than an extremely complex analysis group. The end result is that the TTI analysis can contain a type erased implementation that supports the polymorphic TTI interface. We can build one from a target-specific implementation or from a dummy one in the IR. I've also factored all of the code into "mix-in"-able base classes, including CRTP base classes to facilitate calling back up to the most specialized form when delegating horizontally across the surface. These aren't as clean as I would like and I'm planning to work on cleaning some of this up, but I wanted to start by putting into the right form. There are a number of reasons for this change, and this particular design. The first and foremost reason is that an analysis group is complete overkill, and the chaining delegation strategy was so opaque, confusing, and high overhead that TTI was suffering greatly for it. Several of the TTI functions had failed to be implemented in all places because of the chaining-based delegation making there be no checking of this. A few other functions were implemented with incorrect delegation. The message to me was very clear working on this -- the delegation and analysis group structure was too confusing to be useful here. The other reason of course is that this is *much* more natural fit for the new pass manager. This will lay the ground work for a type-erased per-function info object that can look up the correct subtarget and even cache it. Yet another benefit is that this will significantly simplify the interaction of the pass managers and the TargetMachine. See the future work below. The downside of this change is that it is very, very verbose. I'm going to work to improve that, but it is somewhat an implementation necessity in C++ to do type erasure. =/ I discussed this design really extensively with Eric and Hal prior to going down this path, and afterward showed them the result. No one was really thrilled with it, but there doesn't seem to be a substantially better alternative. Using a base class and virtual method dispatch would make the code much shorter, but as discussed in the update to the programmer's manual and elsewhere, a polymorphic interface feels like the more principled approach even if this is perhaps the least compelling example of it. ;] Ultimately, there is still a lot more to be done here, but this was the huge chunk that I couldn't really split things out of because this was the interface change to TTI. I've tried to minimize all the other parts of this. The follow up work should include at least: 1) Improving the TargetMachine interface by having it directly return a TTI object. Because we have a non-pass object with value semantics and an internal type erasure mechanism, we can narrow the interface of the TargetMachine to *just* do what we need: build and return a TTI object that we can then insert into the pass pipeline. 2) Make the TTI object be fully specialized for a particular function. This will include splitting off a minimal form of it which is sufficient for the inliner and the old pass manager. 3) Add a new pass manager analysis which produces TTI objects from the target machine for each function. This may actually be done as part of #2 in order to use the new analysis to implement #2. 4) Work on narrowing the API between TTI and the targets so that it is easier to understand and less verbose to type erase. 5) Work on narrowing the API between TTI and its clients so that it is easier to understand and less verbose to forward. 6) Try to improve the CRTP-based delegation. I feel like this code is just a bit messy and exacerbating the complexity of implementing the TTI in each target. Many thanks to Eric and Hal for their help here. I ended up blocked on this somewhat more abruptly than I expected, and so I appreciate getting it sorted out very quickly. Differential Revision: http://reviews.llvm.org/D7293 llvm-svn: 227669
2015-01-31 11:43:40 +08:00
return X86TTIImpl::getIntImmCost(Imm, Ty);
Revert "Revert "Add Constant Hoisting Pass" (r200034)" This reverts commit r200058 and adds the using directive for ARMTargetTransformInfo to silence two g++ overload warnings. llvm-svn: 200062
2014-01-25 10:02:55 +08:00
}
Prune trailing whitespaces and CRs. llvm-svn: 242117
2015-07-14 12:03:49 +08:00
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
// Return an average cost of Gather / Scatter instruction, maybe improved later
int X86TTIImpl::getGSVectorCost(unsigned Opcode, Type *SrcVTy, Value *Ptr,
unsigned Alignment, unsigned AddressSpace) {
assert(isa<VectorType>(SrcVTy) && "Unexpected type in getGSVectorCost");
unsigned VF = SrcVTy->getVectorNumElements();
// Try to reduce index size from 64 bit (default for GEP)
// to 32. It is essential for VF 16. If the index can't be reduced to 32, the
// operation will use 16 x 64 indices which do not fit in a zmm and needs
// to split. Also check that the base pointer is the same for all lanes,
// and that there's at most one variable index.
auto getIndexSizeInBits = [](Value *Ptr, const DataLayout& DL) {
unsigned IndexSize = DL.getPointerSizeInBits();
GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr);
if (IndexSize < 64 || !GEP)
return IndexSize;
[CostModel][X86][XOP] Added XOP costmodel for BITREVERSE Now that we have a nice fast VPPERM solution. Added framework for future intrinsic costs as well. llvm-svn: 270537
2016-05-24 16:17:50 +08:00
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
unsigned NumOfVarIndices = 0;
Value *Ptrs = GEP->getPointerOperand();
if (Ptrs->getType()->isVectorTy() && !getSplatValue(Ptrs))
return IndexSize;
for (unsigned i = 1; i < GEP->getNumOperands(); ++i) {
if (isa<Constant>(GEP->getOperand(i)))
continue;
Type *IndxTy = GEP->getOperand(i)->getType();
if (IndxTy->isVectorTy())
IndxTy = IndxTy->getVectorElementType();
if ((IndxTy->getPrimitiveSizeInBits() == 64 &&
!isa<SExtInst>(GEP->getOperand(i))) ||
++NumOfVarIndices > 1)
return IndexSize; // 64
}
return (unsigned)32;
};
// Trying to reduce IndexSize to 32 bits for vector 16.
// By default the IndexSize is equal to pointer size.
unsigned IndexSize = (VF >= 16) ? getIndexSizeInBits(Ptr, DL) :
DL.getPointerSizeInBits();
Do not use getGlobalContext()... ever. This code was creating a new type in the global context, regardless of which context the user is sitting in, what can possibly go wrong? From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266275
2016-04-14 12:36:40 +08:00
Type *IndexVTy = VectorType::get(IntegerType::get(SrcVTy->getContext(),
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
IndexSize), VF);
std::pair<int, MVT> IdxsLT = TLI->getTypeLegalizationCost(DL, IndexVTy);
std::pair<int, MVT> SrcLT = TLI->getTypeLegalizationCost(DL, SrcVTy);
int SplitFactor = std::max(IdxsLT.first, SrcLT.first);
if (SplitFactor > 1) {
// Handle splitting of vector of pointers
Type *SplitSrcTy = VectorType::get(SrcVTy->getScalarType(), VF / SplitFactor);
return SplitFactor * getGSVectorCost(Opcode, SplitSrcTy, Ptr, Alignment,
AddressSpace);
}
// The gather / scatter cost is given by Intel architects. It is a rough
// number since we are looking at one instruction in a time.
const int GSOverhead = 2;
return GSOverhead + VF * getMemoryOpCost(Opcode, SrcVTy->getScalarType(),
Alignment, AddressSpace);
}
/// Return the cost of full scalarization of gather / scatter operation.
///
/// Opcode - Load or Store instruction.
/// SrcVTy - The type of the data vector that should be gathered or scattered.
/// VariableMask - The mask is non-constant at compile time.
/// Alignment - Alignment for one element.
/// AddressSpace - pointer[s] address space.
///
int X86TTIImpl::getGSScalarCost(unsigned Opcode, Type *SrcVTy,
bool VariableMask, unsigned Alignment,
unsigned AddressSpace) {
unsigned VF = SrcVTy->getVectorNumElements();
int MaskUnpackCost = 0;
if (VariableMask) {
VectorType *MaskTy =
Do not use getGlobalContext()... ever. This code was creating a new type in the global context, regardless of which context the user is sitting in, what can possibly go wrong? From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266275
2016-04-14 12:36:40 +08:00
VectorType::get(Type::getInt1Ty(SrcVTy->getContext()), VF);
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
MaskUnpackCost = getScalarizationOverhead(MaskTy, false, true);
int ScalarCompareCost =
Do not use getGlobalContext()... ever. This code was creating a new type in the global context, regardless of which context the user is sitting in, what can possibly go wrong? From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266275
2016-04-14 12:36:40 +08:00
getCmpSelInstrCost(Instruction::ICmp, Type::getInt1Ty(SrcVTy->getContext()),
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
nullptr);
int BranchCost = getCFInstrCost(Instruction::Br);
MaskUnpackCost += VF * (BranchCost + ScalarCompareCost);
}
// The cost of the scalar loads/stores.
int MemoryOpCost = VF * getMemoryOpCost(Opcode, SrcVTy->getScalarType(),
Alignment, AddressSpace);
int InsertExtractCost = 0;
if (Opcode == Instruction::Load)
for (unsigned i = 0; i < VF; ++i)
// Add the cost of inserting each scalar load into the vector
InsertExtractCost +=
getVectorInstrCost(Instruction::InsertElement, SrcVTy, i);
else
for (unsigned i = 0; i < VF; ++i)
// Add the cost of extracting each element out of the data vector
InsertExtractCost +=
getVectorInstrCost(Instruction::ExtractElement, SrcVTy, i);
return MemoryOpCost + MaskUnpackCost + InsertExtractCost;
}
/// Calculate the cost of Gather / Scatter operation
int X86TTIImpl::getGatherScatterOpCost(unsigned Opcode, Type *SrcVTy,
Value *Ptr, bool VariableMask,
unsigned Alignment) {
assert(SrcVTy->isVectorTy() && "Unexpected data type for Gather/Scatter");
unsigned VF = SrcVTy->getVectorNumElements();
PointerType *PtrTy = dyn_cast<PointerType>(Ptr->getType());
if (!PtrTy && Ptr->getType()->isVectorTy())
PtrTy = dyn_cast<PointerType>(Ptr->getType()->getVectorElementType());
assert(PtrTy && "Unexpected type for Ptr argument");
unsigned AddressSpace = PtrTy->getAddressSpace();
bool Scalarize = false;
if ((Opcode == Instruction::Load && !isLegalMaskedGather(SrcVTy)) ||
(Opcode == Instruction::Store && !isLegalMaskedScatter(SrcVTy)))
Scalarize = true;
// Gather / Scatter for vector 2 is not profitable on KNL / SKX
// Vector-4 of gather/scatter instruction does not exist on KNL.
// We can extend it to 8 elements, but zeroing upper bits of
// the mask vector will add more instructions. Right now we give the scalar
AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost. In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426). * Shiffle-broadcast cost will be changed in Simon's upcoming patch. Differential Revision: https://reviews.llvm.org/D28118 llvm-svn: 290810
2017-01-02 18:37:52 +08:00
// cost of vector-4 for KNL. TODO: Check, maybe the gather/scatter instruction
// is better in the VariableMask case.
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
if (VF == 2 || (VF == 4 && !ST->hasVLX()))
Scalarize = true;
if (Scalarize)
AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost. In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426). * Shiffle-broadcast cost will be changed in Simon's upcoming patch. Differential Revision: https://reviews.llvm.org/D28118 llvm-svn: 290810
2017-01-02 18:37:52 +08:00
return getGSScalarCost(Opcode, SrcVTy, VariableMask, Alignment,
AddressSpace);
Implemented cost model for masked gather and scatter operations The cost is calculated for all X86 targets. When gather/scatter instruction is not supported we calculate the cost of scalar sequence. Differential revision: http://reviews.llvm.org/D15677 llvm-svn: 256519
2015-12-29 04:10:59 +08:00
return getGSVectorCost(Opcode, SrcVTy, Ptr, Alignment, AddressSpace);
}
Reapply fix PR23384 (part 3 of 3) r304824 (was reverted in r305720). The root cause of reverting was fixed - PR33514. Summary: The patch makes instruction count the highest priority for LSR solution for X86 (previously registers had highest priority). Reviewers: qcolombet Differential Revision: http://reviews.llvm.org/D30562 From: Evgeny Stupachenko <evstupac@gmail.com> <evgeny.v.stupachenko@intel.com> llvm-svn: 310289
2017-08-08 03:56:34 +08:00
bool X86TTIImpl::isLSRCostLess(TargetTransformInfo::LSRCost &C1,
TargetTransformInfo::LSRCost &C2) {
// X86 specific here are "instruction number 1st priority".
return std::tie(C1.Insns, C1.NumRegs, C1.AddRecCost,
C1.NumIVMuls, C1.NumBaseAdds,
C1.ScaleCost, C1.ImmCost, C1.SetupCost) <
std::tie(C2.Insns, C2.NumRegs, C2.AddRecCost,
C2.NumIVMuls, C2.NumBaseAdds,
C2.ScaleCost, C2.ImmCost, C2.SetupCost);
}
Removed parameter "Consecutive" from isLegalMaskedLoad() / isLegalMaskedStore(). Originally I planned to use the same interface for masked gather/scatter and set isConsecutive to "false" in this case. Now I'm implementing masked gather/scatter and see that the interface is inconvenient. I want to add interfaces isLegalMaskedGather() / isLegalMaskedScatter() instead of using the "Consecutive" parameter in the existing interfaces. Differential Revision: http://reviews.llvm.org/D13850 llvm-svn: 250686
2015-10-19 15:43:38 +08:00
bool X86TTIImpl::isLegalMaskedLoad(Type *DataTy) {
Type *ScalarTy = DataTy->getScalarType();
Pointers in Masked Load, Store, Gather, Scatter intrinsics The masked intrinsics support all integer and floating point data types. I added the pointer type to this list. Added tests for CodeGen and for Loop Vectorizer. Updated the Language Reference. Differential Revision: http://reviews.llvm.org/D14150 llvm-svn: 253544
2015-11-19 15:17:16 +08:00
int DataWidth = isa<PointerType>(ScalarTy) ?
DL.getPointerSizeInBits() : ScalarTy->getPrimitiveSizeInBits();
Prune trailing whitespaces and CRs. llvm-svn: 242117
2015-07-14 12:03:49 +08:00
[AVX512] Don't use i128 masked gather/scatter/load/store. Do more accurately dataWidth check. Differential Revision: http://reviews.llvm.org/D23055 llvm-svn: 277435
2016-08-02 17:15:28 +08:00
return ((DataWidth == 32 || DataWidth == 64) && ST->hasAVX()) ||
((DataWidth == 8 || DataWidth == 16) && ST->hasBWI());
Prune trailing whitespaces and CRs. llvm-svn: 242117
2015-07-14 12:03:49 +08:00
}
Masked Load / Store Intrinsics - the CodeGen part. I'm recommiting the codegen part of the patch. The vectorizer part will be send to review again. Masked Vector Load and Store Intrinsics. Introduced new target-independent intrinsics in order to support masked vector loads and stores. The loop vectorizer optimizes loops containing conditional memory accesses by generating these intrinsics for existing targets AVX2 and AVX-512. The vectorizer asks the target about availability of masked vector loads and stores. Added SDNodes for masked operations and lowering patterns for X86 code generator. Examples: <16 x i32> @llvm.masked.load.v16i32(i8* %addr, <16 x i32> %passthru, i32 4 /* align */, <16 x i1> %mask) declare void @llvm.masked.store.v8f64(i8* %addr, <8 x double> %value, i32 4, <8 x i1> %mask) Scalarizer for other targets (not AVX2/AVX-512) will be done in a separate patch. http://reviews.llvm.org/D6191 llvm-svn: 223348
2014-12-04 17:40:44 +08:00
Removed parameter "Consecutive" from isLegalMaskedLoad() / isLegalMaskedStore(). Originally I planned to use the same interface for masked gather/scatter and set isConsecutive to "false" in this case. Now I'm implementing masked gather/scatter and see that the interface is inconvenient. I want to add interfaces isLegalMaskedGather() / isLegalMaskedScatter() instead of using the "Consecutive" parameter in the existing interfaces. Differential Revision: http://reviews.llvm.org/D13850 llvm-svn: 250686
2015-10-19 15:43:38 +08:00
bool X86TTIImpl::isLegalMaskedStore(Type *DataType) {
return isLegalMaskedLoad(DataType);
Masked Load / Store Intrinsics - the CodeGen part. I'm recommiting the codegen part of the patch. The vectorizer part will be send to review again. Masked Vector Load and Store Intrinsics. Introduced new target-independent intrinsics in order to support masked vector loads and stores. The loop vectorizer optimizes loops containing conditional memory accesses by generating these intrinsics for existing targets AVX2 and AVX-512. The vectorizer asks the target about availability of masked vector loads and stores. Added SDNodes for masked operations and lowering patterns for X86 code generator. Examples: <16 x i32> @llvm.masked.load.v16i32(i8* %addr, <16 x i32> %passthru, i32 4 /* align */, <16 x i1> %mask) declare void @llvm.masked.store.v8f64(i8* %addr, <8 x double> %value, i32 4, <8 x i1> %mask) Scalarizer for other targets (not AVX2/AVX-512) will be done in a separate patch. http://reviews.llvm.org/D6191 llvm-svn: 223348
2014-12-04 17:40:44 +08:00
}
Scalarizer for masked.gather and masked.scatter intrinsics. When the target does not support these intrinsics they should be converted to a chain of scalar load or store operations. If the mask is not constant, the scalarizer will build a chain of conditional basic blocks. I added isLegalMaskedGather() isLegalMaskedScatter() APIs. Differential Revision: http://reviews.llvm.org/D13722 llvm-svn: 251237
2015-10-25 23:37:55 +08:00
bool X86TTIImpl::isLegalMaskedGather(Type *DataTy) {
// This function is called now in two cases: from the Loop Vectorizer
// and from the Scalarizer.
// When the Loop Vectorizer asks about legality of the feature,
// the vectorization factor is not calculated yet. The Loop Vectorizer
// sends a scalar type and the decision is based on the width of the
// scalar element.
// Later on, the cost model will estimate usage this intrinsic based on
// the vector type.
// The Scalarizer asks again about legality. It sends a vector type.
// In this case we can reject non-power-of-2 vectors.
if (isa<VectorType>(DataTy) && !isPowerOf2_32(DataTy->getVectorNumElements()))
return false;
Type *ScalarTy = DataTy->getScalarType();
Pointers in Masked Load, Store, Gather, Scatter intrinsics The masked intrinsics support all integer and floating point data types. I added the pointer type to this list. Added tests for CodeGen and for Loop Vectorizer. Updated the Language Reference. Differential Revision: http://reviews.llvm.org/D14150 llvm-svn: 253544
2015-11-19 15:17:16 +08:00
int DataWidth = isa<PointerType>(ScalarTy) ?
DL.getPointerSizeInBits() : ScalarTy->getPrimitiveSizeInBits();
Scalarizer for masked.gather and masked.scatter intrinsics. When the target does not support these intrinsics they should be converted to a chain of scalar load or store operations. If the mask is not constant, the scalarizer will build a chain of conditional basic blocks. I added isLegalMaskedGather() isLegalMaskedScatter() APIs. Differential Revision: http://reviews.llvm.org/D13722 llvm-svn: 251237
2015-10-25 23:37:55 +08:00
// AVX-512 allows gather and scatter
[AVX512] Don't use i128 masked gather/scatter/load/store. Do more accurately dataWidth check. Differential Revision: http://reviews.llvm.org/D23055 llvm-svn: 277435
2016-08-02 17:15:28 +08:00
return (DataWidth == 32 || DataWidth == 64) && ST->hasAVX512();
Scalarizer for masked.gather and masked.scatter intrinsics. When the target does not support these intrinsics they should be converted to a chain of scalar load or store operations. If the mask is not constant, the scalarizer will build a chain of conditional basic blocks. I added isLegalMaskedGather() isLegalMaskedScatter() APIs. Differential Revision: http://reviews.llvm.org/D13722 llvm-svn: 251237
2015-10-25 23:37:55 +08:00
}
bool X86TTIImpl::isLegalMaskedScatter(Type *DataType) {
return isLegalMaskedGather(DataType);
}
Rename hasCompatibleFunctionAttributes->areInlineCompatible based on suggestions. Currently the function is only used for inline purposes and this is more descriptive for the use. llvm-svn: 243578
2015-07-30 06:09:48 +08:00
bool X86TTIImpl::areInlineCompatible(const Function *Caller,
const Function *Callee) const {
Implement TargetTransformInfo::hasCompatibleFunctionAttributes for X86. This checks subtarget feature compatibility for inlining by verifying that the callee is a strict subset of the caller's features. This includes the cpu as part of the subtarget we can get via the incoming functions as the backend takes CPUs as feature sets. This allows us to inline things like: int foo() { return baz(); } int __attribute__((target("sse4.2"))) bar() { return foo(); } so that generic code can be inlined into specialized functions. llvm-svn: 241221
2015-07-02 09:11:50 +08:00
const TargetMachine &TM = getTLI()->getTargetMachine();
// Work this as a subsetting of subtarget features.
const FeatureBitset &CallerBits =
TM.getSubtargetImpl(*Caller)->getFeatureBits();
const FeatureBitset &CalleeBits =
TM.getSubtargetImpl(*Callee)->getFeatureBits();
// FIXME: This is likely too limiting as it will include subtarget features
// that we might not care about for inlining, but it is conservatively
// correct.
return (CallerBits & CalleeBits) == CalleeBits;
}
[X86] Enable interleaved memory access by default This lets the loop vectorizer generate interleaved memory accesses on x86. Differential Revision: https://reviews.llvm.org/D25350 llvm-svn: 284779
2016-10-21 05:04:31 +08:00
[x86] enable CGP memcmp() expansion for 2/4/8 byte sizes There are a couple of potential improvements as seen in the IR and asm: 1. We're unnecessarily extending to a larger type to compare values. 2. The codegen for (select cond, 1, -1) could avoid a cmov. (or we could change the order of the compares, so we have a select with 0 operand) llvm-svn: 305802
2017-06-20 23:58:30 +08:00
bool X86TTIImpl::expandMemCmp(Instruction *I, unsigned &MaxLoadSize) {
// TODO: We can increase these based on available vector ops.
MaxLoadSize = ST->is64Bit() ? 8 : 4;
return true;
}
[X86] Enable interleaved memory access by default This lets the loop vectorizer generate interleaved memory accesses on x86. Differential Revision: https://reviews.llvm.org/D25350 llvm-svn: 284779
2016-10-21 05:04:31 +08:00
bool X86TTIImpl::enableInterleavedAccessVectorization() {
// TODO: We expect this to be beneficial regardless of arch,
// but there are currently some unexplained performance artifacts on Atom.
// As a temporary solution, disable on Atom.
[X86] enable memory interleaving for X86\SLM arch. Differential Revision: https://reviews.llvm.org/D28547 llvm-svn: 293040
2017-01-25 17:14:48 +08:00
return !(ST->isAtom());
[X86] Enable interleaved memory access by default This lets the loop vectorizer generate interleaved memory accesses on x86. Differential Revision: https://reviews.llvm.org/D25350 llvm-svn: 284779
2016-10-21 05:04:31 +08:00
}
AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost. In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426). * Shiffle-broadcast cost will be changed in Simon's upcoming patch. Differential Revision: https://reviews.llvm.org/D28118 llvm-svn: 290810
2017-01-02 18:37:52 +08:00
[AVX2] [TTI CostModel] Add cost of interleaved loads/stores for AVX2 The cost of an interleaved access was only implemented for AVX512. For other X86 targets an overly conservative Base cost was returned, resulting in avoiding vectorization where it is actually profitable to vectorize. This patch starts to add costs for AVX2 for most prominent cases of interleaved accesses (stride 3,4 chars, for now). Note1: Improvements of up to ~4x were observed in some of EEMBC's rgb workloads; There is also a known issue of 15-30% degradations on some of these workloads, associated with an interleaved access followed by type promotion/widening; the resulting shuffle sequence is currently inefficient and will be improved by a series of patches that extend the X86InterleavedAccess pass (such as D34601 and more to follow). Note 2: The costs in this patch do not reflect port pressure penalties which can be very dominant in the case of interleaved accesses since most of the shuffle operations are restricted to a single port. Further tuning, that may incorporate these considerations, will be done on top of the upcoming improved shuffle sequences (that is, along with the abovementioned work to extend X86InterleavedAccess pass). Differential Revision: https://reviews.llvm.org/D34023 llvm-svn: 306238
2017-06-25 16:26:25 +08:00
// Get estimation for interleaved load/store operations for AVX2.
// \p Factor is the interleaved-access factor (stride) - number of
// (interleaved) elements in the group.
// \p Indices contains the indices for a strided load: when the
// interleaved load has gaps they indicate which elements are used.
// If Indices is empty (or if the number of indices is equal to the size
// of the interleaved-access as given in \p Factor) the access has no gaps.
//
// As opposed to AVX-512, AVX2 does not have generic shuffles that allow
// computing the cost using a generic formula as a function of generic
// shuffles. We therefore use a lookup table instead, filled according to
// the instruction sequences that codegen currently generates.
int X86TTIImpl::getInterleavedMemoryOpCostAVX2(unsigned Opcode, Type *VecTy,
unsigned Factor,
ArrayRef<unsigned> Indices,
unsigned Alignment,
unsigned AddressSpace) {
// We currently Support only fully-interleaved groups, with no gaps.
// TODO: Support also strided loads (interleaved-groups with gaps).
if (Indices.size() && Indices.size() != Factor)
return BaseT::getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
// VecTy for interleave memop is <VF*Factor x Elt>.
// So, for VF=4, Interleave Factor = 3, Element type = i32 we have
// VecTy = <12 x i32>.
MVT LegalVT = getTLI()->getTypeLegalizationCost(DL, VecTy).second;
// This function can be called with VecTy=<6xi128>, Factor=3, in which case
// the VF=2, while v2i128 is an unsupported MVT vector type
// (see MachineValueType.h::getVectorVT()).
if (!LegalVT.isVector())
return BaseT::getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
unsigned VF = VecTy->getVectorNumElements() / Factor;
Type *ScalarTy = VecTy->getVectorElementType();
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
[AVX2] [TTI CostModel] Add cost of interleaved loads/stores for AVX2 The cost of an interleaved access was only implemented for AVX512. For other X86 targets an overly conservative Base cost was returned, resulting in avoiding vectorization where it is actually profitable to vectorize. This patch starts to add costs for AVX2 for most prominent cases of interleaved accesses (stride 3,4 chars, for now). Note1: Improvements of up to ~4x were observed in some of EEMBC's rgb workloads; There is also a known issue of 15-30% degradations on some of these workloads, associated with an interleaved access followed by type promotion/widening; the resulting shuffle sequence is currently inefficient and will be improved by a series of patches that extend the X86InterleavedAccess pass (such as D34601 and more to follow). Note 2: The costs in this patch do not reflect port pressure penalties which can be very dominant in the case of interleaved accesses since most of the shuffle operations are restricted to a single port. Further tuning, that may incorporate these considerations, will be done on top of the upcoming improved shuffle sequences (that is, along with the abovementioned work to extend X86InterleavedAccess pass). Differential Revision: https://reviews.llvm.org/D34023 llvm-svn: 306238
2017-06-25 16:26:25 +08:00
// Calculate the number of memory operations (NumOfMemOps), required
// for load/store the VecTy.
unsigned VecTySize = DL.getTypeStoreSize(VecTy);
unsigned LegalVTSize = LegalVT.getStoreSize();
unsigned NumOfMemOps = (VecTySize + LegalVTSize - 1) / LegalVTSize;
// Get the cost of one memory operation.
Type *SingleMemOpTy = VectorType::get(VecTy->getVectorElementType(),
LegalVT.getVectorNumElements());
unsigned MemOpCost =
getMemoryOpCost(Opcode, SingleMemOpTy, Alignment, AddressSpace);
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
[AVX2] [TTI CostModel] Add cost of interleaved loads/stores for AVX2 The cost of an interleaved access was only implemented for AVX512. For other X86 targets an overly conservative Base cost was returned, resulting in avoiding vectorization where it is actually profitable to vectorize. This patch starts to add costs for AVX2 for most prominent cases of interleaved accesses (stride 3,4 chars, for now). Note1: Improvements of up to ~4x were observed in some of EEMBC's rgb workloads; There is also a known issue of 15-30% degradations on some of these workloads, associated with an interleaved access followed by type promotion/widening; the resulting shuffle sequence is currently inefficient and will be improved by a series of patches that extend the X86InterleavedAccess pass (such as D34601 and more to follow). Note 2: The costs in this patch do not reflect port pressure penalties which can be very dominant in the case of interleaved accesses since most of the shuffle operations are restricted to a single port. Further tuning, that may incorporate these considerations, will be done on top of the upcoming improved shuffle sequences (that is, along with the abovementioned work to extend X86InterleavedAccess pass). Differential Revision: https://reviews.llvm.org/D34023 llvm-svn: 306238
2017-06-25 16:26:25 +08:00
VectorType *VT = VectorType::get(ScalarTy, VF);
EVT ETy = TLI->getValueType(DL, VT);
if (!ETy.isSimple())
return BaseT::getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
// TODO: Complete for other data-types and strides.
// Each combination of Stride, ElementTy and VF results in a different
// sequence; The cost tables are therefore accessed with:
// Factor (stride) and VectorType=VFxElemType.
// The Cost accounts only for the shuffle sequence;
// The cost of the loads/stores is accounted for separately.
//
static const CostTblEntry AVX2InterleavedLoadTbl[] = {
{ 3, MVT::v2i8, 10 }, //(load 6i8 and) deinterleave into 3 x 2i8
{ 3, MVT::v4i8, 4 }, //(load 12i8 and) deinterleave into 3 x 4i8
{ 3, MVT::v8i8, 9 }, //(load 24i8 and) deinterleave into 3 x 8i8
{ 3, MVT::v16i8, 18}, //(load 48i8 and) deinterleave into 3 x 16i8
{ 3, MVT::v32i8, 42 }, //(load 96i8 and) deinterleave into 3 x 32i8
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
[AVX2] [TTI CostModel] Add cost of interleaved loads/stores for AVX2 The cost of an interleaved access was only implemented for AVX512. For other X86 targets an overly conservative Base cost was returned, resulting in avoiding vectorization where it is actually profitable to vectorize. This patch starts to add costs for AVX2 for most prominent cases of interleaved accesses (stride 3,4 chars, for now). Note1: Improvements of up to ~4x were observed in some of EEMBC's rgb workloads; There is also a known issue of 15-30% degradations on some of these workloads, associated with an interleaved access followed by type promotion/widening; the resulting shuffle sequence is currently inefficient and will be improved by a series of patches that extend the X86InterleavedAccess pass (such as D34601 and more to follow). Note 2: The costs in this patch do not reflect port pressure penalties which can be very dominant in the case of interleaved accesses since most of the shuffle operations are restricted to a single port. Further tuning, that may incorporate these considerations, will be done on top of the upcoming improved shuffle sequences (that is, along with the abovementioned work to extend X86InterleavedAccess pass). Differential Revision: https://reviews.llvm.org/D34023 llvm-svn: 306238
2017-06-25 16:26:25 +08:00
{ 4, MVT::v2i8, 12 }, //(load 8i8 and) deinterleave into 4 x 2i8
{ 4, MVT::v4i8, 4 }, //(load 16i8 and) deinterleave into 4 x 4i8
{ 4, MVT::v8i8, 20 }, //(load 32i8 and) deinterleave into 4 x 8i8
{ 4, MVT::v16i8, 39 }, //(load 64i8 and) deinterleave into 4 x 16i8
{ 4, MVT::v32i8, 80 } //(load 128i8 and) deinterleave into 4 x 32i8
};
static const CostTblEntry AVX2InterleavedStoreTbl[] = {
{ 3, MVT::v2i8, 7 }, //interleave 3 x 2i8 into 6i8 (and store)
{ 3, MVT::v4i8, 8 }, //interleave 3 x 4i8 into 12i8 (and store)
{ 3, MVT::v8i8, 11 }, //interleave 3 x 8i8 into 24i8 (and store)
{ 3, MVT::v16i8, 17 }, //interleave 3 x 16i8 into 48i8 (and store)
{ 3, MVT::v32i8, 32 }, //interleave 3 x 32i8 into 96i8 (and store)
{ 4, MVT::v2i8, 12 }, //interleave 4 x 2i8 into 8i8 (and store)
{ 4, MVT::v4i8, 9 }, //interleave 4 x 4i8 into 16i8 (and store)
{ 4, MVT::v8i8, 16 }, //interleave 4 x 8i8 into 32i8 (and store)
{ 4, MVT::v16i8, 20 }, //interleave 4 x 16i8 into 64i8 (and store)
{ 4, MVT::v32i8, 40 } //interleave 4 x 32i8 into 128i8 (and store)
};
if (Opcode == Instruction::Load) {
if (const auto *Entry =
CostTableLookup(AVX2InterleavedLoadTbl, Factor, ETy.getSimpleVT()))
return NumOfMemOps * MemOpCost + Entry->Cost;
} else {
assert(Opcode == Instruction::Store &&
"Expected Store Instruction at this point");
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
if (const auto *Entry =
[AVX2] [TTI CostModel] Add cost of interleaved loads/stores for AVX2 The cost of an interleaved access was only implemented for AVX512. For other X86 targets an overly conservative Base cost was returned, resulting in avoiding vectorization where it is actually profitable to vectorize. This patch starts to add costs for AVX2 for most prominent cases of interleaved accesses (stride 3,4 chars, for now). Note1: Improvements of up to ~4x were observed in some of EEMBC's rgb workloads; There is also a known issue of 15-30% degradations on some of these workloads, associated with an interleaved access followed by type promotion/widening; the resulting shuffle sequence is currently inefficient and will be improved by a series of patches that extend the X86InterleavedAccess pass (such as D34601 and more to follow). Note 2: The costs in this patch do not reflect port pressure penalties which can be very dominant in the case of interleaved accesses since most of the shuffle operations are restricted to a single port. Further tuning, that may incorporate these considerations, will be done on top of the upcoming improved shuffle sequences (that is, along with the abovementioned work to extend X86InterleavedAccess pass). Differential Revision: https://reviews.llvm.org/D34023 llvm-svn: 306238
2017-06-25 16:26:25 +08:00
CostTableLookup(AVX2InterleavedStoreTbl, Factor, ETy.getSimpleVT()))
return NumOfMemOps * MemOpCost + Entry->Cost;
}
return BaseT::getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
}
AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost. In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426). * Shiffle-broadcast cost will be changed in Simon's upcoming patch. Differential Revision: https://reviews.llvm.org/D28118 llvm-svn: 290810
2017-01-02 18:37:52 +08:00
// Get estimation for interleaved load/store operations and strided load.
// \p Indices contains indices for strided load.
// \p Factor - the factor of interleaving.
// AVX-512 provides 3-src shuffles that significantly reduces the cost.
int X86TTIImpl::getInterleavedMemoryOpCostAVX512(unsigned Opcode, Type *VecTy,
unsigned Factor,
ArrayRef<unsigned> Indices,
unsigned Alignment,
unsigned AddressSpace) {
// VecTy for interleave memop is <VF*Factor x Elt>.
// So, for VF=4, Interleave Factor = 3, Element type = i32 we have
// VecTy = <12 x i32>.
// Calculate the number of memory operations (NumOfMemOps), required
// for load/store the VecTy.
MVT LegalVT = getTLI()->getTypeLegalizationCost(DL, VecTy).second;
unsigned VecTySize = DL.getTypeStoreSize(VecTy);
unsigned LegalVTSize = LegalVT.getStoreSize();
unsigned NumOfMemOps = (VecTySize + LegalVTSize - 1) / LegalVTSize;
// Get the cost of one memory operation.
Type *SingleMemOpTy = VectorType::get(VecTy->getVectorElementType(),
LegalVT.getVectorNumElements());
unsigned MemOpCost =
getMemoryOpCost(Opcode, SingleMemOpTy, Alignment, AddressSpace);
if (Opcode == Instruction::Load) {
// Kind of shuffle depends on number of loaded values.
// If we load the entire data in one register, we can use a 1-src shuffle.
// Otherwise, we'll merge 2 sources in each operation.
TTI::ShuffleKind ShuffleKind =
(NumOfMemOps > 1) ? TTI::SK_PermuteTwoSrc : TTI::SK_PermuteSingleSrc;
unsigned ShuffleCost =
getShuffleCost(ShuffleKind, SingleMemOpTy, 0, nullptr);
unsigned NumOfLoadsInInterleaveGrp =
Indices.size() ? Indices.size() : Factor;
Type *ResultTy = VectorType::get(VecTy->getVectorElementType(),
VecTy->getVectorNumElements() / Factor);
unsigned NumOfResults =
getTLI()->getTypeLegalizationCost(DL, ResultTy).first *
NumOfLoadsInInterleaveGrp;
// About a half of the loads may be folded in shuffles when we have only
// one result. If we have more than one result, we do not fold loads at all.
unsigned NumOfUnfoldedLoads =
NumOfResults > 1 ? NumOfMemOps : NumOfMemOps / 2;
// Get a number of shuffle operations per result.
unsigned NumOfShufflesPerResult =
std::max((unsigned)1, (unsigned)(NumOfMemOps - 1));
// The SK_MergeTwoSrc shuffle clobbers one of src operands.
// When we have more than one destination, we need additional instructions
// to keep sources.
unsigned NumOfMoves = 0;
if (NumOfResults > 1 && ShuffleKind == TTI::SK_PermuteTwoSrc)
NumOfMoves = NumOfResults * NumOfShufflesPerResult / 2;
int Cost = NumOfResults * NumOfShufflesPerResult * ShuffleCost +
NumOfUnfoldedLoads * MemOpCost + NumOfMoves;
return Cost;
}
// Store.
assert(Opcode == Instruction::Store &&
"Expected Store Instruction at this point");
// There is no strided stores meanwhile. And store can't be folded in
// shuffle.
unsigned NumOfSources = Factor; // The number of values to be merged.
unsigned ShuffleCost =
getShuffleCost(TTI::SK_PermuteTwoSrc, SingleMemOpTy, 0, nullptr);
unsigned NumOfShufflesPerStore = NumOfSources - 1;
// The SK_MergeTwoSrc shuffle clobbers one of src operands.
// We need additional instructions to keep sources.
unsigned NumOfMoves = NumOfMemOps * NumOfShufflesPerStore / 2;
int Cost = NumOfMemOps * (MemOpCost + NumOfShufflesPerStore * ShuffleCost) +
NumOfMoves;
return Cost;
}
int X86TTIImpl::getInterleavedMemoryOpCost(unsigned Opcode, Type *VecTy,
unsigned Factor,
ArrayRef<unsigned> Indices,
unsigned Alignment,
unsigned AddressSpace) {
auto isSupportedOnAVX512 = [](Type *VecTy, bool &RequiresBW) {
RequiresBW = false;
Type *EltTy = VecTy->getVectorElementType();
if (EltTy->isFloatTy() || EltTy->isDoubleTy() || EltTy->isIntegerTy(64) ||
EltTy->isIntegerTy(32) || EltTy->isPointerTy())
return true;
if (EltTy->isIntegerTy(16) || EltTy->isIntegerTy(8)) {
RequiresBW = true;
return true;
}
return false;
};
bool RequiresBW;
bool HasAVX512Solution = isSupportedOnAVX512(VecTy, RequiresBW);
if (ST->hasAVX512() && HasAVX512Solution && (!RequiresBW || ST->hasBWI()))
return getInterleavedMemoryOpCostAVX512(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
[AVX2] [TTI CostModel] Add cost of interleaved loads/stores for AVX2 The cost of an interleaved access was only implemented for AVX512. For other X86 targets an overly conservative Base cost was returned, resulting in avoiding vectorization where it is actually profitable to vectorize. This patch starts to add costs for AVX2 for most prominent cases of interleaved accesses (stride 3,4 chars, for now). Note1: Improvements of up to ~4x were observed in some of EEMBC's rgb workloads; There is also a known issue of 15-30% degradations on some of these workloads, associated with an interleaved access followed by type promotion/widening; the resulting shuffle sequence is currently inefficient and will be improved by a series of patches that extend the X86InterleavedAccess pass (such as D34601 and more to follow). Note 2: The costs in this patch do not reflect port pressure penalties which can be very dominant in the case of interleaved accesses since most of the shuffle operations are restricted to a single port. Further tuning, that may incorporate these considerations, will be done on top of the upcoming improved shuffle sequences (that is, along with the abovementioned work to extend X86InterleavedAccess pass). Differential Revision: https://reviews.llvm.org/D34023 llvm-svn: 306238
2017-06-25 16:26:25 +08:00
if (ST->hasAVX2())
return getInterleavedMemoryOpCostAVX2(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
Strip trailing whitespace. NFCI. llvm-svn: 309584
2017-08-01 01:09:27 +08:00
AVX-512 Loop Vectorizer: Cost calculation for interleave load/store patterns. X86 target does not provide any target specific cost calculation for interleave patterns.It uses the common target-independent calculation, which gives very high numbers. As a result, the scalar version is chosen in many cases. The situation on AVX-512 is even worse, since we have 3-src shuffles that significantly reduce the cost. In this patch I calculate the cost on AVX-512. It will allow to compare interleave pattern with gather/scatter and choose a better solution (PR31426). * Shiffle-broadcast cost will be changed in Simon's upcoming patch. Differential Revision: https://reviews.llvm.org/D28118 llvm-svn: 290810
2017-01-02 18:37:52 +08:00
return BaseT::getInterleavedMemoryOpCost(Opcode, VecTy, Factor, Indices,
Alignment, AddressSpace);
}