[all-commits] [llvm/llvm-project] a911fc: [X86] Fold expand(splat, passthrough, mask) -> selec...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a911fc12ec1f280203e243810de2b8acafbca4b8
      https://github.com/llvm/llvm-project/commit/a911fc12ec1f280203e243810de2b8acafbca4b8
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2026-02-09 (Mon, 09 Feb 2026)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-combining-avx512f.ll

  Log Message:
  -----------
  [X86] Fold expand(splat,passthrough,mask) -> select(splat,passthrough,mask) (#180238)

If all elements of the expansion vector are already splatted in place then we can use a vselect directly



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