Commit Graph

886 Commits

Author SHA1 Message Date
Juneyoung Lee 9b29610228 Use unary CreateShuffleVector if possible
As mentioned in D93793, there are quite a few places where unary `IRBuilder::CreateShuffleVector(X, Mask)` can be used
instead of `IRBuilder::CreateShuffleVector(X, Undef, Mask)`.
Let's update them.

Actually, it would have been more natural if the patches were made in this order:
(1) let them use unary CreateShuffleVector first
(2) update IRBuilder::CreateShuffleVector to use poison as a placeholder value (D93793)

The order is swapped, but in terms of correctness it is still fine.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D93923
2020-12-30 22:36:08 +09:00
Chih-Ping Chen 5f75dcf571 [DebugInfo] Support Fortran 'use <external module>' statement.
The main change is to add a 'IsDecl' field to DIModule so
that when IsDecl is set to true, the debug info entry generated
for the module would be marked as a declaration. That way, the debugger
would look up the definition of the module in the gloabl scope.

Please see the comments in llvm/test/DebugInfo/X86/dimodule.ll
for what the debug info entries would look like.

Differential Revision: https://reviews.llvm.org/D93462
2020-12-18 13:10:57 -05:00
Whitney Tsang fa3693ad0b [LoopNest] Handle loop-nest passes in LoopPassManager
Per http://llvm.org/OpenProjects.html#llvm_loopnest, the goal of this
patch (and other following patches) is to create facilities that allow
implementing loop nest passes that run on top-level loop nests for the
New Pass Manager.

This patch extends the functionality of LoopPassManager to handle
loop-nest passes by specializing the definition of LoopPassManager that
accepts both kinds of passes in addPass.

Only loop passes are executed if L is not a top-level one, and both
kinds of passes are executed if L is top-level. Currently, loop nest
passes should have the following run method:

PreservedAnalyses run(LoopNest &, LoopAnalysisManager &,
LoopStandardAnalysisResults &, LPMUpdater &);

Reviewed By: Whitney, ychen
Differential Revision: https://reviews.llvm.org/D87045
2020-12-16 17:07:14 +00:00
Fangrui Song 8c4e55762d [docs][unittest][Go][StackProtector] Migrate deprecated DebugInfo::get to DILocation::get 2020-12-15 14:17:04 -08:00
Florian Hahn bb9cef7628
[CallBase] Add hasRetAttr version that takes StringRef.
This makes it slightly easier to deal with custom attributes and
CallBase already provides hasFnAttr versions that support both AttrKind
and StringRef arguments in a similar fashion.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D92567
2020-12-10 17:00:16 +00:00
Cullen Rhodes 4167a0259e [IR] Support scalable vectors in CastInst::CreatePointerCast
Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92482
2020-12-09 10:39:36 +00:00
Arthur Eubanks 554e6db18e [test] Rewrite phi-empty.ll into a unittest
phi-empty.ll does not pass under the new PM because the NPM runs
-loop-simplify. Running -loop-simplify ends up not reproing
https://llvm.org/PR48296.

Verified that this test fails when 9eb2c011 is reverted.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D92807
2020-12-08 09:59:31 -08:00
Cullen Rhodes 2cfbdaf601 [IR] Remove CastInst::isCastable since it is not used
It was removed back in 2013 (f63dfbb) by Matt Arsenault but then
reverted since DragonEgg used it, but that project is no longer
maintained.

Reviewed By: ldionne, dexonsmith

Differential Revision: https://reviews.llvm.org/D92571
2020-12-08 10:31:53 +00:00
Cullen Rhodes 7b1cb47150 [IR] Bail out for scalable vectors in ShuffleVectorInst::isConcat
Shuffle mask for concat can't be expressed for scalable vectors, so we
should bail out. A test has been added that previously crashed, also
tested isIdentityWithPadding and isIdentityWithExtract where we already
bail out.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92475
2020-12-07 10:48:35 +00:00
Cullen Rhodes 9b01896555 [IR] Support scalable vectors in ShuffleVectorInst::increasesLength
Since the length of the llvm::SmallVector shufflemask is related to the
minimum number of elements in a scalable vector, it is fine to just get
the Min field of the ElementCount. This is already done for the similar
function changesLength, tests have been added for both.

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92472
2020-12-07 10:42:48 +00:00
Cullen Rhodes 333de690ea [IR] Disallow scalable vectors in ShuffleVectorInst::isExtractSubvectorMask
It's not possible to express an extract subvector shuffle mask for
a scalable vector.

Reviewed By: david-arm

Differential Revision: https://reviews.llvm.org/D92312
2020-12-04 11:30:51 +00:00
Fangrui Song 1d6ebdfb66 Switch from llvm::is_trivially_copyable to std::is_trivially_copyable
GCC<5 did not support std::is_trivially_copyable. Now LLVM builds require 5.1
we can migrate to std::is_trivially_copyable.

The Optional.h change made MSVC choke
(https://buildkite.com/llvm-project/premerge-checks/builds/18587#cd1bb616-ffdc-4581-9795-b42c284196de)
so I leave it out for now.

Differential Revision: https://reviews.llvm.org/D92514
2020-12-02 22:02:48 -08:00
Reid Kleckner 91e66bfd32 Revert "Use std::is_trivially_copyable", breaks MSVC build
Revert "Delete llvm::is_trivially_copyable and CMake variable HAVE_STD_IS_TRIVIALLY_COPYABLE"

This reverts commit 4d4bd40b57.

This reverts commit 557b00e0af.
2020-12-02 14:30:46 -08:00
Fangrui Song 4d4bd40b57 Use std::is_trivially_copyable
GCC<5 did not support std::is_trivially_copyable. Now LLVM builds require 5.1
we can migrate to std::is_trivially_copyable.
2020-12-02 09:58:07 -08:00
Cullen Rhodes 14557cdf94 [InstructionsTest] NFC: Replace VectorType::get(.., .., true) with ScalableVectorType::get
Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D92467
2020-12-02 10:50:05 +00:00
Juneyoung Lee 53040a968d [ConstantFold] Fold more operations to poison
This patch folds more operations to poison.

Alive2 proof: https://alive2.llvm.org/ce/z/mxcb9G (it does not contain tests about div/rem because they fold to poison when raising UB)

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D92270
2020-11-29 21:19:48 +09:00
Juneyoung Lee c6b62efb91 [ConstantFold] Fold operations to poison if possible
This patch updates ConstantFold, so operations are folded into poison if possible.

<alive2 proofs>
casts: https://alive2.llvm.org/ce/z/WSj7rw
binary operations (arithmetic): https://alive2.llvm.org/ce/z/_7dEyJ
binary operations (bitwise): https://alive2.llvm.org/ce/z/cezjVN
vector/aggregate operations: https://alive2.llvm.org/ce/z/BQ7hWz
unary ops: https://alive2.llvm.org/ce/z/yBRs4q
other ops: https://alive2.llvm.org/ce/z/iXbcFD

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D92203
2020-11-29 02:28:40 +09:00
Francesco Petrogalli 8e0148dff7 [AllocaInst] Update `getAllocationSizeInBits` to return `TypeSize`.
Reviewed By: peterwaller-arm, sdesmalen

Differential Revision: https://reviews.llvm.org/D92020
2020-11-27 16:39:10 +00:00
Arthur Eubanks 3d1149c6fe Make CallInst::updateProfWeight emit i32 weights instead of i64
Typically branch_weights are i32, not i64.
This fixes entry_counts_cold.ll under NPM.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D90539
2020-11-24 18:13:59 -08:00
Alex Richardson 3bc4157556 Add a default address space for globals to DataLayout
This is similar to the existing alloca and program address spaces (D37052)
and should be used when creating/accessing global variables.
We need this in our CHERI fork of LLVM to place all globals in address space 200.
This ensures that values are accessed using CHERI load/store instructions
instead of the normal MIPS/RISC-V ones.

The problem this is trying to fix is that most of the time the type of
globals is created using a simple PointerType::getUnqual() (or ::get() with
the default address-space value of 0). This does not work for us and we get
assertion/compilation/instruction selection failures whenever a new call
is added that uses the default value of zero.

In our fork we have removed the default parameter value of zero for most
address space arguments and use DL.getProgramAddressSpace() or
DL.getGlobalsAddressSpace() whenever possible. If this change is accepted,
I will upstream follow-up patches to use DL.getGlobalsAddressSpace() instead
of relying on the default value of 0 for PointerType::get(), etc.

This patch and the follow-up changes will not have any functional changes
for existing backends with the default globals address space of zero.
A follow-up commit will change the default globals address space for
AMDGPU to 1.

Reviewed By: dylanmckay

Differential Revision: https://reviews.llvm.org/D70947
2020-11-20 15:46:52 +00:00
Andrzej Warzynski ccf500ce00 [NFC] Add missing dependency in the IR unittests
This missing dependency has caused build failures when
`BUILD_SHARED_LIBS` is set to `ON`. The breaking change was introduced
here:
  * https://reviews.llvm.org/D91324

Failing buildbot:
  * http://lab.llvm.org:8011/#/builders/66/builds/555
2020-11-18 10:10:44 +00:00
Yevgeny Rouban cba3e78338 [NewPM] Disable PreservedCFGChecker and add regression unit tests
The design of the PreservedCFG Checker (landed with the commit
28012e00d8) has a fundamental flaw which makes it incorrect.
The checker is based on the PreservedAnalyses result returned
by functional passes: if CFGAnalyses is in the returned
PreservedAnalyses set, then the checker asserts that the CFG
snapshot saved before the pass is equal to the CFG snapshot
taken after the the pass. The problem is in passes that change
CFG and invalidate CFGAnalyses on their own. Such passes do not
return CFGanalyses in the returned PreservedAnalyses. So the
checker mistakenly expects CFG unchanged. As an example see the
class TestSimplifyCFGInvalidatingAnalysisPass in the new tests.

It is interesting that the bug was not found in LLVM. That is
because the CFG checker ran only if CFGAnalyses was checked
incorrectly:
  if (!PassPA.allAnalysesInSetPreserved<CFGAnalyses>())
    return;

but must be checked as follows:
  auto PAC = PA.getChecker<PreservedCFGCheckerAnalysis>();
  if (!(PAC.preserved() ||
        PAC.preservedSet<AllAnalysesOn<Function>>() ||
        PAC.preservedSet<CFGAnalyses>())
    return;

A fully redesigned checker will be sent as a separate follow-up
patch.

Reviewed By: Serguei Katkov, Jakub Kuderski

Differential Revision: https://reviews.llvm.org/D91324
2020-11-18 10:02:47 +07:00
Florian Hahn c1f6f30040
[PatternMatch] Add single index InsertValue matcher.
This patch adds a new matcher for single index InsertValue instructions,
similar to the existing matcher for ExtractValue.

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D91352
2020-11-12 21:27:18 +00:00
Arthur Eubanks d8f531c42c [NewPM] Don't run before pass instrumentation on required passes
This allows those instrumentation to log when they decide to skip a
pass. This provides extra helpful info for optnone functions and also
will help with opt-bisect.

Have OptNoneInstrumentation print when it skips due to seeing optnone.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D90545
2020-11-04 09:45:10 -08:00
Simon Pilgrim b36cb12a49 Fix gcc braces warning. NFCI.
gcc warns that the EXPECT_TRUE macro isn't surrounded by if() {} - we already do this in other cases in the file.
2020-11-04 15:26:32 +00:00
Arthur Eubanks 2e31727a88 [NFC] Clean up PassBuilder
Make DebugLogging a member variable so that users of PassBuilder don't
need to pass it around so much.

Move call to TargetMachine::registerPassBuilderCallbacks() within
PassBuilder so users don't need to remember to call it.

Reviewed By: asbirlea

Differential Revision: https://reviews.llvm.org/D90437
2020-10-30 10:03:59 -07:00
Adrian Prantl 0b2b50a5d2 [DebugInfo] Expose Fortran array debug info attributes through DIBuilder.
The support of a few debug info attributes specifically for Fortran
arrays have been added to LLVM recently, but there's no way to take
advantage of them through DIBuilder. This patch extends
DIBuilder::createArrayType to enable the settings of those attributes.

Patch by Chih-Ping Chen!

Differential Review: https://reviews.llvm.org/D90323
2020-10-28 13:13:35 -07:00
Alok Kumar Sharma a6dd01afa3 [DebugInfo] Support for DW_TAG_generic_subrange
This is needed to support fortran assumed rank arrays which
have runtime rank.

  Summary:
Fortran assumed rank arrays have dynamic rank. DWARF TAG
DW_TAG_generic_subrange is needed to support that.

  Testing:
unit test cases added (hand-written)
check llvm
check debug-info

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D89218
2020-10-29 01:34:15 +05:30
Mitch Phillips ae76729a01 Revert "[DebugInfo] Expose Fortran array debug info attributes through DIBuilder."
This reverts commit 5b3bf8b453.

This caused a regression in the ASan buildbot. See comments at
https://reviews.llvm.org/D89817 for more information.
2020-10-27 20:50:51 -07:00
Adrian Prantl 5b3bf8b453 [DebugInfo] Expose Fortran array debug info attributes through DIBuilder.
The support of a few debug info attributes specifically for Fortran
arrays have been added to LLVM recently, but there's no way to take
advantage of them through DIBuilder. This patch extends
DIBuilder::createArrayType to enable the settings of those attributes.

Patch by Chih-Ping Chen!

Differential Revision: https://reviews.llvm.org/D89817
2020-10-26 16:23:36 -07:00
Jay Foad 922285abec [PatternMatch] Add new FP matchers. NFC.
This adds matchers m_NonNaN, m_NonInf, m_Finite and m_NonZeroFP as well
as generic support for binding the matched value to an APFloat.

I tried to follow the existing convention of using an FP suffix for
predicates like zero and non-zero, which could be confused with the
integer versions, but not for predicates which are clearly already
FP-specific.

Differential Revision: https://reviews.llvm.org/D89038
2020-10-22 19:43:12 +01:00
Nikita Popov 32b6e9a450 [DomTree] Accept Value as Def (NFC)
Non-instruction defs like arguments, constants or global values
always dominate all instructions/uses inside the function. This
case currently needs to be treated separately by the caller, see
https://reviews.llvm.org/D89623#inline-832818 for an example.

This patch makes the dominator tree APIs accept a Value instead of
an Instruction and always returns true for the non-Instruction case.

A complication here is that BasicBlocks are also Values. For that
reason we can't support the dominates(Value *, BasicBlock *)
variant, as it would conflict with dominates(BasicBlock *, BasicBlock *),
which has different semantics. For the other two APIs we assert
that the passed value is not a BasicBlock.

Differential Revision: https://reviews.llvm.org/D89632
2020-10-22 18:32:03 +02:00
David Sherwood f5815105d2 [SVE] Remove reliance on TypeSize comparison operators in unit tests
The EXPECT_XY comparison functions all rely upon using the existing
TypeSize comparison operators, which we are deprecating in favour
of isKnownXY. I've changed all such cases to compare either the known
minimum size or the fixed size.

Differential Revision: https://reviews.llvm.org/D89531
2020-10-21 08:05:55 +01:00
Alok Kumar Sharma 96bd4d34a2 [DebugInfo] Support for DWARF attribute DW_AT_rank
This patch adds support for DWARF attribute DW_AT_rank.

  Summary:
Fortran assumed rank arrays have dynamic rank. DWARF attribute
DW_AT_rank is needed to support that.

  Testing:
unit test cases added (hand-written)
check llvm
check debug-info

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D89141
2020-10-10 17:51:12 +05:30
Arthur Eubanks 6dcbea877b [NewPM] Use PassInstrumentation for -verify-each
This removes "VerifyEachPass" parameters from a lot of functions which is nice.

Don't verify after special passes or VerifierPass.

This introduces verification on loop and cgscc passes, verifying the corresponding function/module.

Reviewed By: ychen

Differential Revision: https://reviews.llvm.org/D88764
2020-10-07 19:24:25 -07:00
David Sherwood bafdd11326 [SVE] Replace / operator in TypeSize/ElementCount with divideCoefficientBy
After some recent upstream discussion we decided that it was best
to avoid having the / operator for both ElementCount and TypeSize,
since this could give the impression that these classes can be used
in the same way as basic integer integer types. However, division
for scalable types is a bit odd because we are only dividing the
minimum quantity by a value, as opposed to something like:

  (MinSize * Vscale) / SomeValue

This is why when performing division it's important the caller
first establishes whether the operation makes sense, perhaps by
calling isKnownMultipleOf() prior to division. The caller must now
explictly call divideCoefficientBy() on the class to perform the
operation.

Differential Revision: https://reviews.llvm.org/D87700
2020-09-28 08:03:00 +01:00
Reid Kleckner 495a5e94ba Revert "[NFCI][IR] ConstantRangeTest: add basic scaffolding for next-gen precision/correctness testing"
This reverts commit 9bcf7b1c7a.

Breaks build with MSVC.
2020-09-24 16:47:45 -07:00
Vedant Kumar dfc5a9eb57 [Instruction] Add dropLocation and updateLocationAfterHoist helpers
Introduce a helper which can be used to update the debug location of an
Instruction after the instruction is hoisted. This can be used to safely
drop a source location as recommended by the docs.

For more context, see the discussion in https://reviews.llvm.org/D60913.

Differential Revision: https://reviews.llvm.org/D85670
2020-09-24 15:00:04 -07:00
Roman Lebedev 9bcf7b1c7a
[NFCI][IR] ConstantRangeTest: add basic scaffolding for next-gen precision/correctness testing
I have long complained that while we have exhaustive tests
for ConstantRange, they are, uh, not good.

The approach of groking our own constant range
via exhaustive enumeration is, mysterious.

It neither tells us without doubt that the result is
conservatively correct, nor the precise match to the ConstantRange
result tells us that the result is precise.
But yeah, it's fast, i give it that.

In short, there are three things that we need to check:
1. That ConstantRange result is conservatively correct
2. That ConstantRange range is reasonable
3. That ConstantRange result is reasonably precise

So let's not just check the middle one, but all three.

This provides precision test coverage for D88178.
2020-09-25 00:36:42 +03:00
Roman Lebedev 31177949cb
[NFCI][IR] ConstantRangeTest: refactor operation range gatherers
We do the same dance to acquire the "exact" range of an op via
an exhaustive approach in many places.
Let's not invent the wheel each time.
2020-09-25 00:36:41 +03:00
Arthur Eubanks 29aaa18848 Revert "[NewPM] Add callbacks to PassBuilder to run before/after parsing a pass"
This reverts commit 111aa4e366.
2020-09-23 18:43:13 -07:00
Arthur Eubanks 111aa4e366 [NewPM] Add callbacks to PassBuilder to run before/after parsing a pass
This is in preparation for supporting -debugify-each, which adds a debug
info pass before and after each pass.

Switch VerifyEach to use this.

Reviewed By: ychen

Differential Revision: https://reviews.llvm.org/D88107
2020-09-23 15:25:40 -07:00
Roman Lebedev 7465da2077
[ConstantRange] Introduce getMinSignedBits() method
Similar to the ConstantRange::getActiveBits(), and to similarly-named
methods in APInt, returns the bitwidth needed to represent
the given signed constant range
2020-09-22 21:37:30 +03:00
Roman Lebedev 2ed9c4c70b
[ConstantRange] Introduce getActiveBits() method
Much like APInt::getActiveBits(), computes how many bits are needed
to be able to represent every value in this constant range,
treating the values as unsigned.
2020-09-22 21:37:29 +03:00
Roman Lebedev b38d897e80
[ConstantRange] binaryXor(): special-case binary complement case - the result is precise
Use the fact that `~X` is equivalent to `-1 - X`, which gives us
fully-precise answer, and we only need to special-handle the wrapped case.

This fires ~16k times for vanilla llvm test-suite + RawSpeed.
2020-09-22 21:37:29 +03:00
David Sherwood f4257c5832 [SVE] Make ElementCount members private
This patch changes ElementCount so that the Min and Scalable
members are now private and can only be accessed via the get
functions getKnownMinValue() and isScalable(). In addition I've
added some other member functions for more commonly used operations.
Hopefully this makes the class more useful and will reduce the
need for calling getKnownMinValue().

Differential Revision: https://reviews.llvm.org/D86065
2020-08-28 14:43:53 +01:00
Yevgeny Rouban 18bc400f97 [NewPM][PassInstrumentation] Add PreservedAnalyses parameter to AfterPass* callbacks
Both AfterPass and AfterPassInvalidated pass instrumentation
callbacks get additional parameter of type PreservedAnalyses.
This patch was created by @fedor.sergeev. I have just slightly
changed it.

Reviewers: fedor.sergeev

Differential Revision: https://reviews.llvm.org/D81555
2020-08-21 16:10:42 +07:00
Mehdi Amini a407ec9b6d Revert "Revert "[NFC][llvm] Make the contructors of `ElementCount` private.""
Was reverted because MLIR/Flang builds were broken, these APIs have been
fixed in the meantime.
2020-08-19 17:26:36 +00:00
Mehdi Amini 4fc56d70aa Revert "[NFC][llvm] Make the contructors of `ElementCount` private."
This reverts commit 264afb9e6a.
(and dependent 6b742cc48 and fc53bd610f)

MLIR/Flang are broken.
2020-08-19 17:21:37 +00:00
Francesco Petrogalli 264afb9e6a [NFC][llvm] Make the contructors of `ElementCount` private.
Differential Revision: https://reviews.llvm.org/D86120
2020-08-19 16:26:44 +00:00
Simon Pilgrim c1f6ce0c73 [DemandedBits] Improve accuracy of Add propagator
The current demand propagator for addition will mark all input bits at and right of the alive output bit as alive. But carry won't propagate beyond a bit for which both operands are zero (or one/zero in the case of subtraction) so a more accurate answer is possible given known bits.

I derived a propagator by working through truth tables and using a bit-reversed addition to make demand ripple to the right, but I'm not sure how to make a convincing argument for its correctness in the comments yet. Nevertheless, here's a minimal implementation and test to get feedback.

This would help in a situation where, for example, four bytes (<128) packed into an int are added with four others SIMD-style but only one of the four results is actually read.

Known A:     0_______0_______0_______0_______
Known B:     0_______0_______0_______0_______
AOut:        00000000001000000000000000000000
AB, current: 00000000001111111111111111111111
AB, patch:   00000000001111111000000000000000

Committed on behalf of: @rrika (Erika)

Differential Revision: https://reviews.llvm.org/D72423
2020-08-17 12:54:09 +01:00
Vedant Kumar 30c1633386 Revert "[Instruction] Add updateLocationAfterHoist helper"
This reverts commit 4a646ca9e2.

This is causing some bots to fail with "!dbg attachment points at wrong
subprogram for function", like:

http://lab.llvm.org:8011/builders/sanitizer-windows/builds/67958/steps/stage%201%20check/logs/stdio
2020-08-11 14:54:09 -07:00
Vedant Kumar 4a646ca9e2 [Instruction] Add updateLocationAfterHoist helper
Introduce a helper on Instruction which can be used to update the debug
location after hoisting.

Use this in GVN and LICM, where we were mistakenly introducing new line
0 locations after hoisting (the docs recommend dropping the location in
this case).

For more context, see the discussion in https://reviews.llvm.org/D60913.

Differential Revision: https://reviews.llvm.org/D85670
2020-08-11 14:05:20 -07:00
Arthur Eubanks 72c95b2213 [NewPM] Add callback for skipped passes
Parallel to https://reviews.llvm.org/D84772.

Will use this for printing when a pass is skipped.

Reviewed By: ychen

Differential Revision: https://reviews.llvm.org/D85478
2020-08-06 18:58:59 -07:00
Sanjay Patel 60f2c6a94c [PatternMatch] allow intrinsic form of min/max with existing matchers
I skimmed the existing users of these matchers and don't see any problems
(eg, the caller assumes the matched value was a select instruction without checking).

So I think we can generalize the matching to allow the new intrinsics or the cmp+select idioms.

I did not find any unit tests for the matchers, so added some basics there. The instsimplify
tests are adapted from existing tests for the cmp+select pattern and cover the folds in
simplifyICmpWithMinMax().

Differential Revision: https://reviews.llvm.org/D85230
2020-08-06 10:50:24 -04:00
Kevin P. Neal d535a91d13 [FPEnv] IRBuilder fails to add strictfp attribute
The strictfp attribute is required on all function calls in a function
that is itself marked with the strictfp attribute. The IRBuilder knows
this and has a method for adding the attribute to function call instructions.

If a function being called has the strictfp attribute itself then the
IRBuilder will refuse to add the attribute to the calling instruction
despite being asked to add it. Eliminate this error.

Differential Revision: https://reviews.llvm.org/D84878
2020-08-03 13:25:24 -04:00
Nikita Popov 94f8120cb9 [ConstantRange] Support abs with poison flag
This just adds the ConstantRange support, including exhaustive
testing. It's not wired up to the IR intrinsic flag yet.
2020-07-30 22:49:28 +02:00
Yuanfang Chen 5cf0c2e67b [NewPM][PassInstrument] Add a new kind of before-pass callback that only get called if the pass is not skipped
TODO
 * PrintIRInstrumentation and TimePassesHandler would be using this new callback.
 * "Running pass" logging will also be moved to use this callback.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D84772
2020-07-29 08:26:36 -07:00
Chuanqi Xu dd4106d22e [NFC] Edit the comment in User::replaceUsesOfWith 2020-07-29 10:02:04 +08:00
Sergey Dmitriev bec77ece14 [CallGraph] Preserve call records vector when replacing call edge
Summary:
Try not to resize vector of call records in a call graph node when
replacing call edge. That would prevent invalidation of iterators
stored in the CG SCC pass manager's scc_iterator.

Reviewers: jdoerfert

Reviewed By: jdoerfert

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D84295
2020-07-27 06:02:55 -07:00
Alok Kumar Sharma 2d10258a31 [DebugInfo] Support for DW_AT_associated and DW_AT_allocated.
Summary:
This support is needed for the Fortran array variables with pointer/allocatable
attribute. This support enables debugger to identify the status of variable
whether that is currently allocated/associated.

  for pointer array (before allocation/association)
  without DW_AT_associated

(gdb) pt ptr
type = integer (140737345375288:140737354129776)
(gdb) p ptr
value requires 35017956 bytes, which is more than max-value-size

  with DW_AT_associated

(gdb) pt ptr
type = integer (:)
(gdb) p ptr
$1 = <not associated>

  for allocatable array (before allocation)

  without DW_AT_allocated

(gdb) pt arr
type = integer (140737345375288:140737354129776)
(gdb) p arr
value requires 35017956 bytes, which is more than max-value-size

  with DW_AT_allocated

(gdb) pt arr
type = integer, allocatable (:)
(gdb) p arr
$1 = <not allocated>

    Testing
- unit test cases added
- check-llvm
- check-debuginfo

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D83544
2020-07-20 19:54:35 +05:30
Yuanfang Chen af4c873092 [NewPM] Allow passes to never be skipped
A pass declares itself unskippable by defining a method `static bool isRequired()`.

Also, this patch makes pass managers and adaptor passes required (unskippable).

PassInstrumentation before-pass-callbacks could be used to skip passes by returning false.
However, some passes should not be skipped at all. Especially so for special-purpose passes such as pass managers and adaptor passes since if they are skipped for any reason, the passes contained by them would also be skipped ignoring contained passes's return value of `isRequired()`.

Reviewed By: aeubanks

Differential Revision: https://reviews.llvm.org/D82344
2020-07-18 22:28:46 -07:00
Logan Smith 31eb83496f [llvm][NFC] Add missing 'override's in unittests/ 2020-07-17 17:35:59 -07:00
Christopher Tetreault 9c87c55805 [SVE] Make cstfp_pred_ty and cst_pred_ty work with scalable splats
Reviewers: efriedma, lebedev.ri, fhahn, c-rhodes, david-arm

Reviewed By: efriedma, david-arm

Subscribers: tschuett, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83001
2020-07-14 14:20:39 -07:00
serge-sans-paille 3667d87a33 Double check that passes correctly set their Modified status
The approach is simple: if a pass reports that it's not modifying a
Function/Module, compute a loose hash of that Function/Module and compare it
with the original one. If we report no change but there's a hash change, then we
have an error.

This approach misses a lot of change but it's not super intrusive and can
detect most of the simple mistakes.

Differential Revision: https://reviews.llvm.org/D80916
2020-07-14 09:56:49 +02:00
Christopher Tetreault d2eb409379 [Solaris] Fix Solaris build bots
Reviewers: ro

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83415
2020-07-08 12:21:21 -07:00
serge-sans-paille bf9a940c3f Revert "Double check that passes correctly set their Modified status"
This reverts commit 37afd99c76.
2020-07-08 18:14:40 +02:00
serge-sans-paille 37afd99c76 Double check that passes correctly set their Modified status
The approach is simple: if a pass reports that it's not modifying a
Function/Module, compute a loose hash of that Function/Module and compare it
with the original one. If we report no change but there's a hash change, then we
have an error.

This approach misses a lot of change but it's not super intrusive and can
detect most of the simple mistakes.

Differential Revision: https://reviews.llvm.org/D80916
2020-07-08 17:36:13 +02:00
Christopher Tetreault 021d56abb9 [SVE] Make Constant::getSplatValue work for scalable vector splats
Summary:
Make Constant::getSplatValue recognize scalable vector splats of the
form created by ConstantVector::getSplat. Add unit test to verify that
C == ConstantVector::getSplat(C)->getSplatValue() for fixed width and
scalable vector splats

Reviewers: efriedma, spatel, fpetrogalli, c-rhodes

Reviewed By: efriedma

Subscribers: sdesmalen, tschuett, hiraditya, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82416
2020-07-07 13:45:51 -07:00
Eric Christopher 7c63804383 Fix [-Werror,-Wsign-compare] in dominator unit test. 2020-07-06 14:50:13 -07:00
Nicolai Hähnle dfcc68c528 DomTree: Remove getRoots() accessor
Summary:
Avoid exposing details about how roots are stored. This enables subsequent
type-erasure changes.

v5:
- cleanup a unit test by using EXPECT_EQ instead of EXPECT_TRUE

Change-Id: I532b774cc71f2224e543bc7d79131d97f63f093d

Reviewers: arsenm, RKSimon, mehdi_amini, courbet

Subscribers: jvesely, wdng, hiraditya, kuhar, kerbowa, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83085
2020-07-06 21:58:11 +02:00
jasonliu 572dde55ee [XCOFF][AIX] Use 'L..' instead of '.L' for getPrivateGlobalPrefix in DataLayout
Summary:
D80831 changed part of the prefix usage for AIX.
But there are other places getting prefix from DataLayout.
This patch intends to make prefix usage consistent on AIX.

Reviewed by: hubert.reinterpretcast, daltenty

Differential Revision: https://reviews.llvm.org/D81270
2020-07-03 18:25:14 +00:00
Danila Malyutin 38909f31bd [IR] Short-circuit comparison with itself for Attributes
Differential Revision: https://reviews.llvm.org/D82295
2020-07-03 16:07:14 +03:00
Simon Pilgrim 2013be4836 ModuleTest.cpp - fix implicit SourceMgr.h dependency. NFC.
ModuleTest.cpp was depending on other headers to define SMDiagnostic.
2020-06-23 12:29:52 +01:00
Max Kazantsev 4ac9a6902f [NFC] Add API for edge domination check in dom tree 2020-06-17 16:05:05 +07:00
Christopher Tetreault 1a1849c99b [NFC] Use EXPECT_FALSE(...) in test rather than EXPECT_EQ(false, ...)
Summary: Silence GCC -Wconversion-null warning from GTest

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81976
2020-06-16 15:47:23 -07:00
Christopher Tetreault eb81c85afd [SVE] Deprecate default false variant of VectorType::get
Reviewers: efriedma, fpetrogalli, kmclaughlin, huntergr

Reviewed By: fpetrogalli

Subscribers: cfe-commits, tschuett, rkruppe, psnobl, llvm-commits

Tags: #llvm, #clang

Differential Revision: https://reviews.llvm.org/D80342
2020-06-16 15:16:11 -07:00
Nikita Popov 5f565c0419 [IR] Support efficient AssertingVH/PoisoningVH lookup
Currently, there doesn't seem to be any way to look up a Value*
in a map/set indexed by AssertingVH/PoisoningVH, without creating
a value handle -- which is fairly expensive, because it involves
adding the value handle to the use list and immediately removing
it again. Using find_as(Value *) does not work (and is in fact
worse than just using find(Value *)), because it will end up
creating multiple value handles during the lookup itself.

For AssertingVH, address this by simply using DenseMapInfo<T *>
instead of manually implementing something. The AssertingVH<T>
will now get coerced to T*, rather than the other way around.

For PoisoningVH, add extra overloads of getHashValue() and
isEqual() that accept a T* argument.

This allows using find_as(Value *) to perform efficient lookups
in assertion-enabled builds.

Differential Revision: https://reviews.llvm.org/D81793
2020-06-14 22:03:03 +02:00
Simon Moll a0dfdda4e5 [VP][Fix] canIgnoreVectorLength for scalable types
This patch fixes VPIntrinsic::canIgnoreVectorLength when used on a
VPIntrinsic with scalable vector types. Also includes new unittest cases
for the '<vscale x 1 x whatever>' and '%evl == vscale' corner cases.
2020-06-04 14:17:42 +02:00
Hiroshi Yamauchi 6c27c61d32 [PGO] Improve the working set size heuristics under the partial sample PGO.
Summary:
The working set size heuristics (ProfileSummaryInfo::hasHugeWorkingSetSize)
under the partial sample PGO may not be accurate because the profile is partial
and the number of hot profile counters in the ProfileSummary may not reflect the
actual working set size of the program being compiled.

To improve this, the (approximated) ratio of the the number of profile counters
of the program being compiled to the number of profile counters in the partial
sample profile is computed (which is called the partial profile ratio) and the
working set size of the profile is scaled by this ratio to reflect the working
set size of the program being compiled and used for the working set size
heuristics.

The partial profile ratio is approximated based on the number of the basic
blocks in the program and the NumCounts field in the ProfileSummary and computed
through the thin LTO indexing. This means that there is the limitation that the
scaled working set size is available to the thin LTO post link passes only.

Reviewers: davidxl

Subscribers: mgorny, eraman, hiraditya, steven_wu, dexonsmith, arphaman, dang, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79831
2020-06-01 10:29:23 -07:00
Alok Kumar Sharma d20bf5a725 [DebugInfo] Upgrade DISubrange to support Fortran dynamic arrays
This patch upgrades DISubrange to support fortran requirements.

Summary:
Below are the updates/addition of fields.
lowerBound - Now accepts signed integer or DIVariable or DIExpression,
earlier it accepted only signed integer.
upperBound - This field is now added and accepts signed interger or
DIVariable or DIExpression.
stride - This field is now added and accepts signed interger or
DIVariable or DIExpression.
This is required to describe bounds of array which are known at runtime.

Testing:
unit test cases added (hand-written)
check clang
check llvm
check debug-info

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D80197
2020-05-28 13:46:41 +05:30
Serge Pavlov 4d20e31f73 [FPEnv] Intrinsic llvm.roundeven
This intrinsic implements IEEE-754 operation roundToIntegralTiesToEven,
and performs rounding to the nearest integer value, rounding halfway
cases to even. The intrinsic represents the missed case of IEEE-754
rounding operations and now llvm provides full support of the rounding
operations defined by the standard.

Differential Revision: https://reviews.llvm.org/D75670
2020-05-26 19:24:58 +07:00
Sanjay Patel 7eed772a27 [PatternMatch] abbreviate vector inst matchers; NFC
Readability is not reduced with these opcodes/match lines,
so reduce odds of awkward wrapping from 80-col limit.
2020-05-24 09:19:47 -04:00
Vedant Kumar 77ffce6954 [Instruction] Set metadata uses to undef on deletion
Summary:
Replace any extant metadata uses of a dying instruction with undef to
preserve debug info accuracy. Some alternatives include:

- Treat Instruction like any other Value, and point its extant metadata
  uses to an empty ValueAsMetadata node. This makes extant dbg.value uses
  trivially dead (i.e. fair game for deletion in many passes), leading to
  stale dbg.values being in effect for too long.

- Call salvageDebugInfoOrMarkUndef. Not needed to make instruction removal
  correct. OTOH results in wasted work in some common cases (e.g. when all
  instructions in a BasicBlock are deleted).

This came up while discussing some basic cases in
https://reviews.llvm.org/D80052.

Reviewers: jmorse, TWeaver, aprantl, dexonsmith, jdoerfert

Subscribers: jholewinski, qcolombet, hiraditya, jfb, sstefan1, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D80264
2020-05-21 15:58:12 -07:00
Hiroshi Yamauchi 01909b4e85 [IR] Make Module::setProfileSummary to replace an existing ProfileSummary flag.
Summary:
Module::setProfileSummary currently calls addModuelFlag. This prevents from
updating the ProfileSummary metadata in the module and results in a second
ProfileSummary added instead of replacing an existing one. I don't think this is
the expected behavior. It prevents updating the ProfileSummary and it does not
make sense to have more than one. To address this, add Module::setModuleFlag and
use it from setProfileSummary.

Reviewers: davidxl

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79902
2020-05-21 11:38:39 -07:00
Eli Friedman f26bdb539e Make Value::getPointerAlignment() return an Align, not a MaybeAlign.
If we don't know anything about the alignment of a pointer, Align(1) is
still correct: all pointers are at least 1-byte aligned.

Included in this patch is a bugfix for an issue discovered during this
cleanup: pointers with "dereferenceable" attributes/metadata were
assumed to be aligned according to the type of the pointer.  This
wasn't intentional, as far as I can tell, so Loads.cpp was fixed to
stop making this assumption. Frontends may need to be updated.  I
updated clang's handling of C++ references, and added a release note for
this.

Differential Revision: https://reviews.llvm.org/D80072
2020-05-20 16:37:20 -07:00
Alok Kumar Sharma 4042ada1c1 [DebugInfo] support for DW_AT_data_location in llvm
This patch adds support for DWARF attribute DW_AT_data_location.

Summary:
Dynamic arrays in fortran are described by array descriptor and
data allocation address. Former is mapped to DW_AT_location and
later is mapped to DW_AT_data_location.

Testing:
unit test cases added (hand-written)
check llvm
check debug-info

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D79592
2020-05-15 11:33:17 +05:30
Alina Sbirlea bd541b217f [NewPassManager] Add assertions when getting statefull cached analysis.
Summary:
Analyses that are statefull should not be retrieved through a proxy from
an outer IR unit, as these analyses are only invalidated at the end of
the inner IR unit manager.
This patch disallows getting the outer manager and provides an API to
get a cached analysis through the proxy. If the analysis is not
stateless, the call to getCachedResult will assert.

Reviewers: chandlerc

Subscribers: mehdi_amini, eraman, hiraditya, zzheng, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72893
2020-05-13 12:38:38 -07:00
Sourabh Singh Tomar e59744fd9b [DebugInfo] Fortran module DebugInfo support in LLVM
This patch extends DIModule Debug metadata in LLVM to support
Fortran modules. DIModule is extended to contain File and Line
fields, these fields will be used by Flang FE to create debug
information necessary for representing Fortran modules at IR level.

Furthermore DW_TAG_module is also extended to contain these fields.
If these fields are missing, debuggers like GDB won't be able to
show Fortran modules information correctly.

Reviewed By: aprantl

Differential Revision: https://reviews.llvm.org/D79484
2020-05-13 12:52:30 +05:30
Sergey Dmitriev f637334df9 [CallGraphUpdater] Removed references to calles when deleting function
Summary: Otherwise we can get unaccounted references to call graph nodes.

Reviewers: jdoerfert, sstefan1

Reviewed By: jdoerfert

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79382
2020-05-04 18:59:47 -07:00
Vedant Kumar 9350792c62 [DebugInfo] Update loop metadata in stripNonLineTableDebugInfo
Summary:
Have stripNonLineTableDebugInfo() attach updated !llvm.loop metadata to
an instruction (instead of updating and then discarding the metadata).

This fixes "!dbg attachment points at wrong subprogram for function"
errors seen while archiving an iOS app.

It would be nice -- as a follow-up -- to catch this issue earlier,
perhaps by modifying the verifier to constrain where DILocations are
allowed. Any alternative suggestions appreciated.

rdar://61982466

Reviewers: aprantl, dsanders

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79200
2020-05-01 11:36:05 -07:00
Sergey Dmitriev cfea3dc102 [AbstractCallSite] Look though constant cast expression when checking for callee use
Summary: That makes AbstractCallSite::isCallee(const Use *) behavior consistent with AbstractCallSite constructor.

Reviewers: jdoerfert

Reviewed By: jdoerfert

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79188
2020-04-30 15:09:57 -07:00
Tobias Bosch 6a53ab82d7 [SVE][NFC] Remove unused variable
Summary: Remove unused variable.

Reviewers: echristo, efriedma

Reviewed By: echristo

Subscribers: tschuett, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79129
2020-04-29 14:30:32 -07:00
Christopher Tetreault 0700cb64b5 [SVE] Upgrade VectorType tests to test new types
Reviewers: efriedma, sdesmalen, c-rhodes, ddunbar

Reviewed By: sdesmalen

Subscribers: huntergr, tschuett, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78831
2020-04-29 11:45:46 -07:00
Christopher Tetreault 3ecced163f [SVE] Remove calls to isScalable from IR
Reviewers: efriedma, sdesmalen, dexonsmith, dblaikie

Reviewed By: sdesmalen

Subscribers: tschuett, hiraditya, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77691
2020-04-23 11:51:22 -07:00
Sander de Smalen a5e0389b2a [AArch64] Define ACLE FP conversion intrinsics with more specific predicate.
This patch changes the FP conversion intrinsics to take a predicate
that matches the number of lanes for the vector with the widest element
type as opposed to using <vscale x 16 x i1>.

For example:
```<vscale x 4 x float> @llvm.aarch64.sve.fcvt.f32f16(<vscale x 4 x float>, <vscale x 4 x i1>, <vscale x 8 x half>)```
now uses <vscale x 4 x i1> instead of <vscale x 16 x i1>

And similar for:
```<vscale x 4 x float> @llvm.aarch64.sve.fcvt.f32f64(<vscale x 4 x float>, <vscale x 2 x i1>, <vscale x 2 x double>)```
where the predicate now matches the wider type, so <vscale x 2 x i1>.

Reviewers: efriedma, SjoerdMeijer, paulwalker-arm, rengolin

Reviewed By: efriedma

Tags: #clang

Differential Revision: https://reviews.llvm.org/D78402
2020-04-23 10:53:23 +01:00
LemonBoy aad3d578da [DebugInfo] Change DIEnumerator payload type from int64_t to APInt
This allows the representation of arbitrarily large enumeration values.
See https://lists.llvm.org/pipermail/llvm-dev/2017-December/119475.html for context.

Reviewed By: andrewrk, aprantl, MaskRay

Differential Revision: https://reviews.llvm.org/D62475
2020-04-18 12:49:31 -07:00
Christopher Tetreault c858debebc Remove asserting getters from base Type
Summary:
Remove asserting vector getters from Type in preparation for the
VectorType refactor. The existence of these functions complicates the
refactor while adding little value.

Reviewers: dexonsmith, sdesmalen, efriedma

Reviewed By: efriedma

Subscribers: cfe-commits, hiraditya, llvm-commits

Tags: #llvm, #clang

Differential Revision: https://reviews.llvm.org/D77278
2020-04-17 14:03:31 -07:00
Tyker ff9379f4b2 [NFC] Remove waymarking because it improves performances
Summary:
This patch remove waymarking and replaces it with storing a pointer to the User in the Use.
here are the results on the measurements for the CTMark tests of the test suite.
```
Metric: instructions_count

Program                                                      baseline      patched       diff
 test-suite :: CTMark/ClamAV/clamscan.test                    72557942065   71733653521  -1.1%
 test-suite :: CTMark/sqlite3/sqlite3.test                    76281422939   75484840636  -1.0%
 test-suite :: CTMark/consumer-typeset/consumer-typeset.test  51364676366   50862185614  -1.0%
 test-suite :: CTMark/SPASS/SPASS.test                        60476106505   59908437767  -0.9%
 test-suite :: CTMark/tramp3d-v4/tramp3d-v4.test              112578442329  111725050856 -0.8%
 test-suite :: CTMark/mafft/pairlocalalign.test               50846133013   50473644539  -0.7%
 test-suite :: CTMark/kimwitu++/kc.test                       54692641250   54349070299  -0.6%
 test-suite :: CTMark/7zip/7zip-benchmark.test                182216614747  181216091230 -0.5%
 test-suite :: CTMark/Bullet/bullet.test                      123459210616  122905866767 -0.4%
 Geomean difference                                                                      -0.8%

Metric: peak_memory_use

Program                                                      baseline  patched   diff
 test-suite :: CTMark/tramp3d-v4/tramp3d-v4.test              326864    338524    3.6%
 test-suite :: CTMark/sqlite3/sqlite3.test                    216412    221240    2.2%
 test-suite :: CTMark/7zip/7zip-benchmark.test                11808284  12022604  1.8%
 test-suite :: CTMark/Bullet/bullet.test                      6831752   6945988   1.7%
 test-suite :: CTMark/SPASS/SPASS.test                        2682552   2721820   1.5%
 test-suite :: CTMark/ClamAV/clamscan.test                    5037256   5107936   1.4%
 test-suite :: CTMark/consumer-typeset/consumer-typeset.test  2752728   2790768   1.4%
 test-suite :: CTMark/mafft/pairlocalalign.test               1517676   1537244   1.3%
 test-suite :: CTMark/kimwitu++/kc.test                       1090748   1103448   1.2%
 Geomean difference                                                               1.8%

Metric: compile_time

Program                                                      baseline patched diff
 test-suite :: CTMark/consumer-typeset/consumer-typeset.test  14.71    14.38  -2.2%
 test-suite :: CTMark/sqlite3/sqlite3.test                    23.18    22.73  -2.0%
 test-suite :: CTMark/7zip/7zip-benchmark.test                57.96    56.99  -1.7%
 test-suite :: CTMark/ClamAV/clamscan.test                    20.75    20.49  -1.2%
 test-suite :: CTMark/kimwitu++/kc.test                       18.35    18.15  -1.1%
 test-suite :: CTMark/SPASS/SPASS.test                        18.72    18.57  -0.8%
 test-suite :: CTMark/mafft/pairlocalalign.test               14.09    14.00  -0.6%
 test-suite :: CTMark/Bullet/bullet.test                      37.38    37.19  -0.5%
 test-suite :: CTMark/tramp3d-v4/tramp3d-v4.test              33.81    33.76  -0.2%
 Geomean difference                                                           -1.1%
```

i believe that it is worth trading +1.8% peak memory use for -1.1% compile time.
also this patch removes waymarking which simplifies the Use and User classes.

Reviewers: nikic, lattner

Reviewed By: lattner

Subscribers: russell.gallop, foad, ggreif, rriddle, ekatz, fhahn, lebedev.ri, mgorny, hiraditya, george.burgess.iv, asbirlea, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77144
2020-04-17 11:27:10 +02:00
Johannes Doerfert 937025757c [CallGraphUpdater] Remove nodes from their SCC (old PM)
Summary:
We can and should remove deleted nodes from their respective SCCs. We
did not do this before and this was a potential problem even though I
couldn't locally trigger an issue. Since the `DeleteNode` would assert
if the node was not in the SCC, we know we only remove nodes from their
SCC and only once (when run on all the Attributor tests).

Reviewers: lebedev.ri, hfinkel, fhahn, probinson, wristow, loladiro, sstefan1, uenoku

Subscribers: hiraditya, bollu, uenoku, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77855
2020-04-15 18:38:50 -05:00