[all-commits] [llvm/llvm-project] 554c47: [SLP]Fix undef poison vector values shuffles with ...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 554c47c8e925c5a1d26bd8590695155086a15ab7
      https://github.com/llvm/llvm-project/commit/554c47c8e925c5a1d26bd8590695155086a15ab7
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2024-05-22 (Wed, 22 May 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/AMDGPU/crash_extract_subvector_cost.ll
    M llvm/test/Transforms/SLPVectorizer/X86/blending-shuffle.ll

  Log Message:
  -----------
  [SLP]Fix undef poison vector values shuffles with poisonous vectors.

If trying to find vector value in shuffling of the extractelements and
one of the vector values is undef value, need to generate real mask value
for such vector and either undef vector, or incoming second vector, if
  non-poisonous.



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