Jorge Botto 9304af3927

[InstCombine] Fixing wrong select folding in vectors with undef elements (#102244) ...

This PR fixes https://github.com/llvm/llvm-project/issues/98435.
`SimplifyDemandedVectorElts` mishandles the undef by assuming that
!isNullValue() means the condition is true.

By preventing any value that we're not certain equals 1 or 0, it avoids
having to make any particular choice by not demanding bits from a
particular branch with potentially picking a wrong value.

Proof: https://alive2.llvm.org/ce/z/r8CmEu

2024-08-09 12:52:56 +02:00

..

CMakeLists.txt

…

InstCombineAddSub.cpp

[PatternMatch] Use m_SpecificCmp matchers. NFC. (#100878)

2024-07-29 10:04:06 +08:00

InstCombineAndOrXor.cpp

[InstCombine] Fold isnan idioms (#101510)

2024-08-02 21:21:31 +08:00

InstCombineAtomicRMW.cpp

[InstCombine][NFC] Fold variable into assert

2023-02-01 12:04:19 +01:00

InstCombineCalls.cpp

[InstCombine] Remove transformation on call instruction where return value need void to non-void conversion (#98536)

2024-08-02 09:07:48 -07:00

InstCombineCasts.cpp

[InstCombine] Recognize copysign idioms (#101324)

2024-08-01 00:14:29 +08:00

InstCombineCompares.cpp

[InstCombine] Fold (icmp eq/ne (or (select cond, 0/NZ, 0/NZ), X), 0)

2024-08-05 23:48:49 +08:00

InstCombineInternal.h

Reapply [InstCombine] Fix context for multi-use demanded bits simplification

2024-07-02 11:02:55 +02:00

InstCombineLoadStoreAlloca.cpp

[InstCombine] Fix a crash in PointerReplacer (#98987)

2024-07-16 13:17:24 -04:00

InstCombineMulDivRem.cpp

[InstCombine] Check for undef first before freeze (#96769)

2024-07-13 18:39:41 +02:00

InstCombineNegator.cpp

[InstCombine] Fold negation of calls to ucmp/scmp by swapping its operands (#98360)

2024-07-10 21:51:55 +02:00

InstCombinePHI.cpp

Revert "[IR][NFC] Update IRBuilder to use InsertPosition (#96497)"

2024-06-24 18:00:22 +01:00

InstCombineSelect.cpp

[InstCombine] Canonicalize more saturated-add variants (#100008)

2024-08-07 14:16:50 -07:00

InstCombineShifts.cpp

[PatternMatch] Use m_Not instead of m_c_Xor with m_AllOnes() (#96837)

2024-06-27 10:14:45 +02:00

InstCombineSimplifyDemanded.cpp

[InstCombine] Fixing wrong select folding in vectors with undef elements (#102244)

2024-08-09 12:52:56 +02:00

InstCombineVectorOps.cpp

[InstCombine] Fix invalid scalarization of div

2024-07-03 11:05:33 +02:00

InstructionCombining.cpp

[PatternMatch] Use m_SpecificCmp matchers. NFC. (#100878)

2024-07-29 10:04:06 +08:00