[all-commits] [llvm/llvm-project] 1b17d1: [X86] Allow select(cond, pshufb, pshufb) -> or(pshuf...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1b17d1ee6e6c9174d32d0bfb6b304917b2dcb2f3
      https://github.com/llvm/llvm-project/commit/1b17d1ee6e6c9174d32d0bfb6b304917b2dcb2f3
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-02-26 (Wed, 26 Feb 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-6.ll
    M llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-8.ll

  Log Message:
  -----------
  [X86] Allow select(cond,pshufb,pshufb) -> or(pshufb,pshufb) fold to peek through bitcasts (#128876)

Peek through one use bitcasts and rescale the condition mask to a vXi8 type to allow more aggressive use of pshufb zeroing.



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