[all-commits] [llvm/llvm-project] 73651b: [x86] lowerV4I32Shuffle - don't adjust PSHUFD spla...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 73651ba9bcb94faded230a8d9bb682250c3c9327
      https://github.com/llvm/llvm-project/commit/73651ba9bcb94faded230a8d9bb682250c3c9327
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-10-03 (Fri, 03 Oct 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/any_extend_vector_inreg_of_broadcast.ll
    M llvm/test/CodeGen/X86/any_extend_vector_inreg_of_broadcast_from_memory.ll
    M llvm/test/CodeGen/X86/shuffle-of-splat-multiuses.ll
    M llvm/test/CodeGen/X86/vec-strict-cmp-128.ll
    M llvm/test/CodeGen/X86/vector-fshl-rot-sub128.ll
    M llvm/test/CodeGen/X86/vector-fshl-sub128.ll
    M llvm/test/CodeGen/X86/vector-fshr-rot-sub128.ll
    M llvm/test/CodeGen/X86/vector-fshr-sub128.ll
    M llvm/test/CodeGen/X86/vector-sext.ll
    M llvm/test/CodeGen/X86/vector-zext.ll
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast.ll
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast_from_memory.ll

  Log Message:
  -----------
  [x86] lowerV4I32Shuffle - don't adjust PSHUFD splat masks to match UNPCK (#161846)

Allow getV4X86ShuffleImm8ForMask to create a pure splat mask, helping to reduce demanded elts.



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