[all-commits] [llvm/llvm-project] c47f3e: [X86] combineSelect - Fold select(pcmpeq(and(X, Pow...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c47f3e8c7027fbf13495dc865c28d852bf77836d
      https://github.com/llvm/llvm-project/commit/c47f3e8c7027fbf13495dc865c28d852bf77836d
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2024-10-09 (Wed, 09 Oct 2024)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vselect-pcmp.ll

  Log Message:
  -----------
  [X86] combineSelect - Fold select(pcmpeq(and(X,Pow2),0),A,B) -> select(pcmpeq(and(X,Pow2),Pow2),B,A)

Matches what we already do in LowerVSETCC to reuse an existing constant

Fixes #110875



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