[PATCH] D110034: [InstCombine] Update vector transforms to use poison instead of undef for insertelement and shufflevector's placeholder

[Hyeongyu Kim via Phabricator via llvm-commits]

hyeongyukim created this revision.
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Like D93818 <https://reviews.llvm.org/D93818>, this patch replaces shufflevector and insertelement's placeholder value with poison.
You can find additional information on why we are changing to use poison instead of Noundef in D93818 <https://reviews.llvm.org/D93818> and https://bugs.llvm.org/show_bug.cgi?id=44185.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110034

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
  llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
  llvm/test/Transforms/InstCombine/X86/x86-avx512-inseltpoison.ll
  llvm/test/Transforms/InstCombine/X86/x86-avx512.ll
  llvm/test/Transforms/InstCombine/X86/x86-f16c-inseltpoison.ll
  llvm/test/Transforms/InstCombine/X86/x86-f16c.ll
  llvm/test/Transforms/InstCombine/broadcast-inseltpoison.ll
  llvm/test/Transforms/InstCombine/broadcast.ll
  llvm/test/Transforms/InstCombine/cast.ll
  llvm/test/Transforms/InstCombine/gep-inbounds-null.ll
  llvm/test/Transforms/InstCombine/getelementptr.ll
  llvm/test/Transforms/InstCombine/icmp-vec-inseltpoison.ll
  llvm/test/Transforms/InstCombine/icmp-vec.ll
  llvm/test/Transforms/InstCombine/insert-extract-shuffle-inseltpoison.ll
  llvm/test/Transforms/InstCombine/insert-extract-shuffle.ll
  llvm/test/Transforms/InstCombine/obfuscated_splat-inseltpoison.ll
  llvm/test/Transforms/InstCombine/obfuscated_splat.ll
  llvm/test/Transforms/InstCombine/reduction-shufflevector.ll
  llvm/test/Transforms/InstCombine/shuffle-cast-dist.ll
  llvm/test/Transforms/InstCombine/shufflevec-bitcast-inseltpoison.ll
  llvm/test/Transforms/InstCombine/shufflevec-bitcast.ll
  llvm/test/Transforms/InstCombine/shufflevector-div-rem-inseltpoison.ll
  llvm/test/Transforms/InstCombine/shufflevector-div-rem.ll
  llvm/test/Transforms/InstCombine/trunc-inseltpoison.ll
  llvm/test/Transforms/InstCombine/trunc.ll
  llvm/test/Transforms/InstCombine/vec-binop-select-inseltpoison.ll
  llvm/test/Transforms/InstCombine/vec-binop-select.ll
  llvm/test/Transforms/InstCombine/vec_demanded_elts-inseltpoison.ll
  llvm/test/Transforms/InstCombine/vec_demanded_elts.ll
  llvm/test/Transforms/InstCombine/vec_shuffle-inseltpoison.ll
  llvm/test/Transforms/InstCombine/vec_shuffle.ll
  llvm/test/Transforms/InstCombine/vector-casts.ll
  llvm/test/Transforms/InstCombine/vscale_cmp.ll
  llvm/test/Transforms/PhaseOrdering/X86/shuffle-inseltpoison.ll
  llvm/test/Transforms/PhaseOrdering/X86/shuffle.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll
  llvm/test/Transforms/SLPVectorizer/X86/alternate-int-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/alternate-int.ll

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