[all-commits] [llvm/llvm-project] eb7ad8: [InstCombine] Remove some uses with replaceUndefsW...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eb7ad8853cfe6ede2d592a417a1ec64636a61bb5
      https://github.com/llvm/llvm-project/commit/eb7ad8853cfe6ede2d592a417a1ec64636a61bb5
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-04-19 (Fri, 19 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
    M llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
    M llvm/test/Transforms/InstCombine/binop-itofp.ll
    M llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ne-to-icmp-ugt.ll
    M llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-sgt-to-icmp-sgt.ll
    M llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-slt-to-icmp-sgt.ll
    M llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ugt-to-icmp-ugt.ll
    M llvm/test/Transforms/InstCombine/canonicalize-constant-low-bit-mask-and-icmp-ult-to-icmp-ugt.ll
    M llvm/test/Transforms/InstCombine/fmul.ll
    M llvm/test/Transforms/InstCombine/vector-xor.ll

  Log Message:
  -----------
  [InstCombine] Remove some uses with replaceUndefsWith() (#89190)

Now that we don't accept undef splat in PatternMatch, we can remove some
uses of replaceUndefsWith(). I believe in all these cases only poison
splats are possible now, in which case no replacement is necessary.



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