[all-commits] [llvm/llvm-project] 318d5b: [InstCombine] Favour `m_Poison` in `SimplifyDemand...

[Antonio Frighetto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 318d5bff0b65aa7d52fc7004d49587416f0fb564
      https://github.com/llvm/llvm-project/commit/318d5bff0b65aa7d52fc7004d49587416f0fb564
  Author: Antonio Frighetto <me at antoniofrighetto.com>
  Date:   2023-12-18 (Mon, 18 Dec 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
    M llvm/test/Transforms/InstCombine/X86/clmulqdq.ll
    M llvm/test/Transforms/InstCombine/X86/x86-avx512-inseltpoison.ll
    M llvm/test/Transforms/InstCombine/X86/x86-avx512.ll
    M llvm/test/Transforms/InstCombine/X86/x86-pshufb.ll
    M llvm/test/Transforms/InstCombine/broadcast.ll
    M llvm/test/Transforms/InstCombine/extractelement.ll
    M llvm/test/Transforms/InstCombine/inselt-binop.ll
    M llvm/test/Transforms/InstCombine/insert-extract-shuffle.ll
    M llvm/test/Transforms/InstCombine/pr38984.ll
    M llvm/test/Transforms/InstCombine/shuffle_select.ll
    M llvm/test/Transforms/InstCombine/shufflevector-div-rem.ll
    M llvm/test/Transforms/InstCombine/sub-of-negatible.ll
    M llvm/test/Transforms/InstCombine/vec_demanded_elts.ll
    M llvm/test/Transforms/InstCombine/vec_gep_scalar_arg.ll
    M llvm/test/Transforms/InstCombine/vec_shuffle.ll
    M llvm/test/Transforms/InstCombine/vector-casts-inseltpoison.ll
    M llvm/test/Transforms/InstCombine/vector-casts.ll

  Log Message:
  -----------
  [InstCombine] Favour `m_Poison` in `SimplifyDemandedVectorElts`

A miscompilation issue has been addressed with refined checking.