Noah Goldstein ad9147399f [InstCombine] Improve eq/ne by parts to handle ult/ugt equality pattern. ...

(icmp eq/ne (lshr x, C), (lshr y, C) gets optimized to `(icmp
ult/uge (xor x, y), (1 << C)`. This can cause the current equal by
parts detection to miss the high-bits as it may get optimized to the
new pattern.

This commit adds support for detecting / combining the ult/ugt
pattern.

Closes #69884

2023-11-04 19:00:28 -05:00

..

CMakeLists.txt

…

InstCombineAddSub.cpp

[InstCombine] Create a class to lazily track computed known bits (#66611)

2023-10-17 21:40:18 +05:30

InstCombineAndOrXor.cpp

[InstCombine] Improve eq/ne by parts to handle ult/ugt equality pattern.

2023-11-04 19:00:28 -05:00

InstCombineAtomicRMW.cpp

[InstCombine][NFC] Fold variable into assert

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

InstCombineCalls.cpp

[InstCombine] Preserve return attributes when merging llvm.ptrmask

2023-11-01 23:50:36 -05:00

InstCombineCasts.cpp

[InstCombine] Fold (ptrtoint (ptrmask p0, m0)) -> (and (ptrtoint p0), m0)

2023-11-01 23:50:36 -05:00

InstCombineCompares.cpp

[IR] Remove ZExtOperator (NFC)

2023-11-03 14:52:59 +01:00

InstCombineInternal.h

[InstCombine] Implement SimplifyDemandedBits for llvm.ptrmask

2023-11-01 23:50:35 -05:00

InstCombineLoadStoreAlloca.cpp

[InstCombine] Remove unnecessary removeBitcastsFromLoadStoreOnMinMax() fold (NFCI)

2023-10-24 17:31:35 +02:00

InstCombineMulDivRem.cpp

[InstCombine] optimize powi(X,Y)/X with Ofast (#67236)

2023-10-21 08:56:14 +08:00

InstCombineNegator.cpp

[llvm] Stop including llvm/ADT/iterator_range.h (NFC)

2023-10-22 15:41:18 -07:00

InstCombinePHI.cpp

[InstCombine] Extend Phi-Icmp use to include or (#67682)

2023-10-24 13:08:25 +01:00

InstCombineSelect.cpp

[InstCombine] Remove redundant logical select fold (NFCI)

2023-10-24 16:28:23 +02:00

InstCombineShifts.cpp

[InstCombine] Improve logic for adding flags to shift instructions.

2023-10-12 16:05:19 -05:00

InstCombineSimplifyDemanded.cpp

[instcombine] Drop zext nneg flag when simplify operand (#71088)

2023-11-02 11:43:57 -07:00

InstCombineVectorOps.cpp

[IR]Add NumSrcElts param to is..Mask static function in ShuffleVectorInst.

2023-10-05 06:17:07 -07:00

InstructionCombining.cpp

[IR] Remove ZExtOperator (NFC)

2023-11-03 14:52:59 +01:00