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llvm-project/llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp

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[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
//===- PreISelIntrinsicLowering.cpp - Pre-ISel intrinsic lowering pass ----===//
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
//
Update the file headers across all of the LLVM projects in the monorepo to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
2019-01-19 16:50:56 +08:00
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
//
//===----------------------------------------------------------------------===//
//
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
// This pass implements IR lowering for the llvm.load.relative and llvm.objc.*
// intrinsics.
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
//
//===----------------------------------------------------------------------===//
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
#include "llvm/CodeGen/PreISelIntrinsicLowering.h"
[ObjC] Override TailCallKind when lowering objc intrinsics The tail-call-kind-ness is known by the ObjCARC analysis and can be enforced while lowering the intrinsics to calls. This allows us to get the requested tail calls at -O0 without trying to preserve the attributes throughout passes that change code even at -O0 ,like the Always Inliner, where the ObjCOpt pass doesn't run. Differential Revision: https://reviews.llvm.org/D69980
2019-11-07 09:09:55 +08:00
#include "llvm/Analysis/ObjCARCInstKind.h"
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
Sink all InitializePasses.h includes This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
2019-11-14 05:15:01 +08:00
#include "llvm/IR/Intrinsics.h"
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
#include "llvm/IR/Module.h"
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
#include "llvm/IR/Type.h"
#include "llvm/IR/User.h"
Sink all InitializePasses.h includes This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
2019-11-14 05:15:01 +08:00
#include "llvm/InitializePasses.h"
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
#include "llvm/Pass.h"
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
#include "llvm/Support/Casting.h"
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
using namespace llvm;
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
static bool lowerLoadRelative(Function &F) {
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
if (F.use_empty())
return false;
bool Changed = false;
Type *Int32Ty = Type::getInt32Ty(F.getContext());
Type *Int32PtrTy = Int32Ty->getPointerTo();
Type *Int8Ty = Type::getInt8Ty(F.getContext());
for (auto I = F.use_begin(), E = F.use_end(); I != E;) {
auto CI = dyn_cast<CallInst>(I->getUser());
++I;
if (!CI || CI->getCalledValue() != &F)
continue;
IRBuilder<> B(CI);
Value *OffsetPtr =
B.CreateGEP(Int8Ty, CI->getArgOperand(0), CI->getArgOperand(1));
Value *OffsetPtrI32 = B.CreateBitCast(OffsetPtr, Int32PtrTy);
[Alignement][NFC] Deprecate untyped CreateAlignedLoad Summary: This is patch is part of a series to introduce an Alignment type. See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html See this patch for the introduction of the type: https://reviews.llvm.org/D64790 Reviewers: courbet Subscribers: arsenm, jvesely, nhaehnle, hiraditya, kerbowa, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D73260
2020-01-23 18:33:12 +08:00
Value *OffsetI32 = B.CreateAlignedLoad(Int32Ty, OffsetPtrI32, Align(4));
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
Value *ResultPtr = B.CreateGEP(Int8Ty, CI->getArgOperand(0), OffsetI32);
CI->replaceAllUsesWith(ResultPtr);
CI->eraseFromParent();
Changed = true;
}
return Changed;
}
[ObjC] Override TailCallKind when lowering objc intrinsics The tail-call-kind-ness is known by the ObjCARC analysis and can be enforced while lowering the intrinsics to calls. This allows us to get the requested tail calls at -O0 without trying to preserve the attributes throughout passes that change code even at -O0 ,like the Always Inliner, where the ObjCOpt pass doesn't run. Differential Revision: https://reviews.llvm.org/D69980
2019-11-07 09:09:55 +08:00
// ObjCARC has knowledge about whether an obj-c runtime function needs to be
// always tail-called or never tail-called.
static CallInst::TailCallKind getOverridingTailCallKind(const Function &F) {
objcarc::ARCInstKind Kind = objcarc::GetFunctionClass(&F);
if (objcarc::IsAlwaysTail(Kind))
return CallInst::TCK_Tail;
else if (objcarc::IsNeverTail(Kind))
return CallInst::TCK_NoTail;
return CallInst::TCK_None;
}
Add nonlazybind to objc_retain/objc_release when converting from intrinsics. For performance reasons, clang set nonlazybind on these functions. Now that we are using intrinsics instead of runtime calls, we should set this attribute when creating the runtime functions. llvm-svn: 349558
2018-12-19 06:31:34 +08:00
static bool lowerObjCCall(Function &F, const char *NewFn,
bool setNonLazyBind = false) {
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
if (F.use_empty())
return false;
// If we haven't already looked up this function, check to see if the
// program already contains a function with this name.
Module *M = F.getParent();
[opaque pointer types] Add a FunctionCallee wrapper type, and use it. Recommit r352791 after tweaking DerivedTypes.h slightly, so that gcc doesn't choke on it, hopefully. Original Message: The FunctionCallee type is effectively a {FunctionType*,Value*} pair, and is a useful convenience to enable code to continue passing the result of getOrInsertFunction() through to EmitCall, even once pointer types lose their pointee-type. Then: - update the CallInst/InvokeInst instruction creation functions to take a Callee, - modify getOrInsertFunction to return FunctionCallee, and - update all callers appropriately. One area of particular note is the change to the sanitizer code. Previously, they had been casting the result of `getOrInsertFunction` to a `Function*` via `checkSanitizerInterfaceFunction`, and storing that. That would report an error if someone had already inserted a function declaraction with a mismatching signature. However, in general, LLVM allows for such mismatches, as `getOrInsertFunction` will automatically insert a bitcast if needed. As part of this cleanup, cause the sanitizer code to do the same. (It will call its functions using the expected signature, however they may have been declared.) Finally, in a small number of locations, callers of `getOrInsertFunction` actually were expecting/requiring that a brand new function was being created. In such cases, I've switched them to Function::Create instead. Differential Revision: https://reviews.llvm.org/D57315 llvm-svn: 352827
2019-02-01 10:28:03 +08:00
FunctionCallee FCache = M->getOrInsertFunction(NewFn, F.getFunctionType());
Preserve the linkage for objc* intrinsics as clang will set them to weak_external in some cases Clang uses weak linkage for objc runtime functions when they are not available on the platform. The intrinsic has this linkage so we just need to pass that on to the runtime call. llvm-svn: 349559
2018-12-19 06:42:08 +08:00
[opaque pointer types] Add a FunctionCallee wrapper type, and use it. Recommit r352791 after tweaking DerivedTypes.h slightly, so that gcc doesn't choke on it, hopefully. Original Message: The FunctionCallee type is effectively a {FunctionType*,Value*} pair, and is a useful convenience to enable code to continue passing the result of getOrInsertFunction() through to EmitCall, even once pointer types lose their pointee-type. Then: - update the CallInst/InvokeInst instruction creation functions to take a Callee, - modify getOrInsertFunction to return FunctionCallee, and - update all callers appropriately. One area of particular note is the change to the sanitizer code. Previously, they had been casting the result of `getOrInsertFunction` to a `Function*` via `checkSanitizerInterfaceFunction`, and storing that. That would report an error if someone had already inserted a function declaraction with a mismatching signature. However, in general, LLVM allows for such mismatches, as `getOrInsertFunction` will automatically insert a bitcast if needed. As part of this cleanup, cause the sanitizer code to do the same. (It will call its functions using the expected signature, however they may have been declared.) Finally, in a small number of locations, callers of `getOrInsertFunction` actually were expecting/requiring that a brand new function was being created. In such cases, I've switched them to Function::Create instead. Differential Revision: https://reviews.llvm.org/D57315 llvm-svn: 352827
2019-02-01 10:28:03 +08:00
if (Function *Fn = dyn_cast<Function>(FCache.getCallee())) {
Preserve the linkage for objc* intrinsics as clang will set them to weak_external in some cases Clang uses weak linkage for objc runtime functions when they are not available on the platform. The intrinsic has this linkage so we just need to pass that on to the runtime call. llvm-svn: 349559
2018-12-19 06:42:08 +08:00
Fn->setLinkage(F.getLinkage());
if (setNonLazyBind && !Fn->isWeakForLinker()) {
// If we have Native ARC, set nonlazybind attribute for these APIs for
// performance.
Add nonlazybind to objc_retain/objc_release when converting from intrinsics. For performance reasons, clang set nonlazybind on these functions. Now that we are using intrinsics instead of runtime calls, we should set this attribute when creating the runtime functions. llvm-svn: 349558
2018-12-19 06:31:34 +08:00
Fn->addFnAttr(Attribute::NonLazyBind);
Preserve the linkage for objc* intrinsics as clang will set them to weak_external in some cases Clang uses weak linkage for objc runtime functions when they are not available on the platform. The intrinsic has this linkage so we just need to pass that on to the runtime call. llvm-svn: 349559
2018-12-19 06:42:08 +08:00
}
}
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
[ObjC] Override TailCallKind when lowering objc intrinsics The tail-call-kind-ness is known by the ObjCARC analysis and can be enforced while lowering the intrinsics to calls. This allows us to get the requested tail calls at -O0 without trying to preserve the attributes throughout passes that change code even at -O0 ,like the Always Inliner, where the ObjCOpt pass doesn't run. Differential Revision: https://reviews.llvm.org/D69980
2019-11-07 09:09:55 +08:00
CallInst::TailCallKind OverridingTCK = getOverridingTailCallKind(F);
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
for (auto I = F.use_begin(), E = F.use_end(); I != E;) {
lowerObjCCall - silence static analyzer dyn_cast<CallInst> null dereference warnings. NFCI. The static analyzer is warning about a potential null dereference, but we should be able to use cast<CallInst> directly and if not assert will fire for us. llvm-svn: 372720
2019-09-24 18:46:30 +08:00
auto *CI = cast<CallInst>(I->getUser());
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
assert(CI->getCalledFunction() && "Cannot lower an indirect call!");
++I;
IRBuilder<> Builder(CI->getParent(), CI->getIterator());
SmallVector<Value *, 8> Args(CI->arg_begin(), CI->arg_end());
CallInst *NewCI = Builder.CreateCall(FCache, Args);
NewCI->setName(CI->getName());
[ObjC] Override TailCallKind when lowering objc intrinsics The tail-call-kind-ness is known by the ObjCARC analysis and can be enforced while lowering the intrinsics to calls. This allows us to get the requested tail calls at -O0 without trying to preserve the attributes throughout passes that change code even at -O0 ,like the Always Inliner, where the ObjCOpt pass doesn't run. Differential Revision: https://reviews.llvm.org/D69980
2019-11-07 09:09:55 +08:00
// Try to set the most appropriate TailCallKind based on both the current
// attributes and the ones that we could get from ObjCARC's special
// knowledge of the runtime functions.
//
// std::max respects both requirements of notail and tail here:
// * notail on either the call or from ObjCARC becomes notail
// * tail on either side is stronger than none, but not notail
CallInst::TailCallKind TCK = CI->getTailCallKind();
NewCI->setTailCallKind(std::max(TCK, OverridingTCK));
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
if (!CI->use_empty())
CI->replaceAllUsesWith(NewCI);
CI->eraseFromParent();
}
return true;
}
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
static bool lowerIntrinsics(Module &M) {
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
bool Changed = false;
for (Function &F : M) {
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
if (F.getName().startswith("llvm.load.relative.")) {
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
Changed |= lowerLoadRelative(F);
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
continue;
}
switch (F.getIntrinsicID()) {
default:
break;
case Intrinsic::objc_autorelease:
Changed |= lowerObjCCall(F, "objc_autorelease");
break;
case Intrinsic::objc_autoreleasePoolPop:
Changed |= lowerObjCCall(F, "objc_autoreleasePoolPop");
break;
case Intrinsic::objc_autoreleasePoolPush:
Changed |= lowerObjCCall(F, "objc_autoreleasePoolPush");
break;
case Intrinsic::objc_autoreleaseReturnValue:
Changed |= lowerObjCCall(F, "objc_autoreleaseReturnValue");
break;
case Intrinsic::objc_copyWeak:
Changed |= lowerObjCCall(F, "objc_copyWeak");
break;
case Intrinsic::objc_destroyWeak:
Changed |= lowerObjCCall(F, "objc_destroyWeak");
break;
case Intrinsic::objc_initWeak:
Changed |= lowerObjCCall(F, "objc_initWeak");
break;
case Intrinsic::objc_loadWeak:
Changed |= lowerObjCCall(F, "objc_loadWeak");
break;
case Intrinsic::objc_loadWeakRetained:
Changed |= lowerObjCCall(F, "objc_loadWeakRetained");
break;
case Intrinsic::objc_moveWeak:
Changed |= lowerObjCCall(F, "objc_moveWeak");
break;
case Intrinsic::objc_release:
Add nonlazybind to objc_retain/objc_release when converting from intrinsics. For performance reasons, clang set nonlazybind on these functions. Now that we are using intrinsics instead of runtime calls, we should set this attribute when creating the runtime functions. llvm-svn: 349558
2018-12-19 06:31:34 +08:00
Changed |= lowerObjCCall(F, "objc_release", true);
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
break;
case Intrinsic::objc_retain:
Add nonlazybind to objc_retain/objc_release when converting from intrinsics. For performance reasons, clang set nonlazybind on these functions. Now that we are using intrinsics instead of runtime calls, we should set this attribute when creating the runtime functions. llvm-svn: 349558
2018-12-19 06:31:34 +08:00
Changed |= lowerObjCCall(F, "objc_retain", true);
Rewrite objc intrinsics to runtime methods in PreISelIntrinsicLowering instead of SDAG. SelectionDAG currently changes these intrinsics to function calls, but that won't work for other ISel's. Also we want to eventually support nonlazybind and weak linkage coming from the front-end which we can't do in SelectionDAG. llvm-svn: 349552
2018-12-19 06:20:03 +08:00
break;
case Intrinsic::objc_retainAutorelease:
Changed |= lowerObjCCall(F, "objc_retainAutorelease");
break;
case Intrinsic::objc_retainAutoreleaseReturnValue:
Changed |= lowerObjCCall(F, "objc_retainAutoreleaseReturnValue");
break;
case Intrinsic::objc_retainAutoreleasedReturnValue:
Changed |= lowerObjCCall(F, "objc_retainAutoreleasedReturnValue");
break;
case Intrinsic::objc_retainBlock:
Changed |= lowerObjCCall(F, "objc_retainBlock");
break;
case Intrinsic::objc_storeStrong:
Changed |= lowerObjCCall(F, "objc_storeStrong");
break;
case Intrinsic::objc_storeWeak:
Changed |= lowerObjCCall(F, "objc_storeWeak");
break;
case Intrinsic::objc_unsafeClaimAutoreleasedReturnValue:
Changed |= lowerObjCCall(F, "objc_unsafeClaimAutoreleasedReturnValue");
break;
case Intrinsic::objc_retainedObject:
Changed |= lowerObjCCall(F, "objc_retainedObject");
break;
case Intrinsic::objc_unretainedObject:
Changed |= lowerObjCCall(F, "objc_unretainedObject");
break;
case Intrinsic::objc_unretainedPointer:
Changed |= lowerObjCCall(F, "objc_unretainedPointer");
break;
case Intrinsic::objc_retain_autorelease:
Changed |= lowerObjCCall(F, "objc_retain_autorelease");
break;
case Intrinsic::objc_sync_enter:
Changed |= lowerObjCCall(F, "objc_sync_enter");
break;
case Intrinsic::objc_sync_exit:
Changed |= lowerObjCCall(F, "objc_sync_exit");
break;
}
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
}
return Changed;
}
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
namespace {
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
class PreISelIntrinsicLoweringLegacyPass : public ModulePass {
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
public:
static char ID;
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
PreISelIntrinsicLoweringLegacyPass() : ModulePass(ID) {}
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
bool runOnModule(Module &M) override { return lowerIntrinsics(M); }
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
};
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
} // end anonymous namespace
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
char PreISelIntrinsicLoweringLegacyPass::ID;
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
INITIALIZE_PASS(PreISelIntrinsicLoweringLegacyPass,
"pre-isel-intrinsic-lowering", "Pre-ISel Intrinsic Lowering",
false, false)
[CodeGen] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC). llvm-svn: 313194
2017-09-14 05:15:20 +08:00
ModulePass *llvm::createPreISelIntrinsicLoweringPass() {
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
return new PreISelIntrinsicLoweringLegacyPass;
}
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
[PM] Port PreISelIntrinsicLowering to the new PM llvm-svn: 273713
2016-06-25 04:13:42 +08:00
PreservedAnalyses PreISelIntrinsicLoweringPass::run(Module &M,
ModuleAnalysisManager &AM) {
if (!lowerIntrinsics(M))
return PreservedAnalyses::all();
else
return PreservedAnalyses::none();
Introduce llvm.load.relative intrinsic. This intrinsic takes two arguments, ``%ptr`` and ``%offset``. It loads a 32-bit value from the address ``%ptr + %offset``, adds ``%ptr`` to that value and returns it. The constant folder specifically recognizes the form of this intrinsic and the constant initializers it may load from; if a loaded constant initializer is known to have the form ``i32 trunc(x - %ptr)``, the intrinsic call is folded to ``x``. LLVM provides that the calculation of such a constant initializer will not overflow at link time under the medium code model if ``x`` is an ``unnamed_addr`` function. However, it does not provide this guarantee for a constant initializer folded into a function body. This intrinsic can be used to avoid the possibility of overflows when loading from such a constant. Differential Revision: http://reviews.llvm.org/D18367 llvm-svn: 267223
2016-04-23 05:18:02 +08:00
}