[all-commits] [llvm/llvm-project] aea3ad: [X86] canCreateUndefOrPoisonForTargetNode - add ha...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: aea3ad8bd3a35adc021cf80b97fad073ece8737b
      https://github.com/llvm/llvm-project/commit/aea3ad8bd3a35adc021cf80b97fad073ece8737b
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-03-18 (Tue, 18 Mar 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-combining-avx512vbmi.ll

  Log Message:
  -----------
  [X86] canCreateUndefOrPoisonForTargetNode - add handling for VPERMV3 intrinsic opcodes (#131768)

We already handle the X86ISD::VPERMV3 node type, but if we can handle equivalent cases before intrinsic lowering we can simplify the code further - e.g. #109272 before constant BUILD_VECTOR nodes gets lowered to constant pool loads.



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