[all-commits] [llvm/llvm-project] da286c: [VectorCombine] foldShuffleToIdentity - peek throu...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: da286c8bf69684d1612d1fc440bd9c6f1a4326df
      https://github.com/llvm/llvm-project/commit/da286c8bf69684d1612d1fc440bd9c6f1a4326df
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VectorCombine.cpp
    M llvm/test/Transforms/PhaseOrdering/X86/blendv-select.ll
    M llvm/test/Transforms/VectorCombine/AArch64/shuffletoidentity.ll

  Log Message:
  -----------
  [VectorCombine] foldShuffleToIdentity - peek through bitcasts to see if they come from the same value to form identity sequence (#98334)

Workaround until I can get #96884 fixed properly - when trying to find identity sequences, peek through any bitcasts to see if the values all came from the same source. We don't run CSE frequently enough to merge all the bitcasts that we end up with.



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