[all-commits] [llvm/llvm-project] 1d06f4: [VectorCombine] foldBitcastShuffle - peek through ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1d06f41b72e429a5b3ba318ff639b8b997e21ff8
      https://github.com/llvm/llvm-project/commit/1d06f41b72e429a5b3ba318ff639b8b997e21ff8
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-04-02 (Tue, 02 Apr 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VectorCombine.cpp
    M llvm/test/Transforms/VectorCombine/X86/shuffle-inseltpoison.ll
    M llvm/test/Transforms/VectorCombine/X86/shuffle.ll

  Log Message:
  -----------
  [VectorCombine] foldBitcastShuffle - peek through any residual bitcasts before creating a new bitcast on top (#86119)

Encountered while working on #67803, wading through the chains of bitcasts that SSE intrinsics introduces - this patch helps prevents cases where the bitcast chains aren't cleared out and we can't perform further combines until after InstCombine/InstSimplify has run.



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