[all-commits] [llvm/llvm-project] d0605e: [InstCombine] Canonicalize splat shuffles to use p...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d0605e21af516f60c081df56fc85ef13342b5aa0
      https://github.com/llvm/llvm-project/commit/d0605e21af516f60c081df56fc85ef13342b5aa0
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-12-18 (Mon, 18 Dec 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
    M llvm/test/Transforms/InstCombine/X86/x86-avx2.ll
    M llvm/test/Transforms/InstCombine/X86/x86-muldq.ll
    M llvm/test/Transforms/InstCombine/X86/x86-pshufb.ll
    M llvm/test/Transforms/InstCombine/X86/x86-vpermil.ll
    M llvm/test/Transforms/InstCombine/icmp-bc-vec.ll
    M llvm/test/Transforms/InstCombine/icmp-vec.ll
    M llvm/test/Transforms/InstCombine/masked_intrinsics.ll
    M llvm/test/Transforms/InstCombine/shift-add.ll
    M llvm/test/Transforms/InstCombine/trunc-extractelement.ll
    M llvm/test/Transforms/InstCombine/vec_demanded_elts.ll
    M llvm/test/Transforms/InstCombine/vec_shuffle.ll
    M llvm/test/Transforms/LowerMatrixIntrinsics/multiply-fused-multiple-blocks.ll
    M llvm/test/Transforms/LowerMatrixIntrinsics/multiply-minimal.ll

  Log Message:
  -----------
  [InstCombine] Canonicalize splat shuffles to use poison operand

If the splat shuffle is represented using an undef RHS, replace it
with poison.