[all-commits] [llvm/llvm-project] e56edb: [X86][SSE] Fold select(X > -1, A, B) -> select(0 >...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e56edb801bbd41925dbaca39162731613fb289f4
      https://github.com/llvm/llvm-project/commit/e56edb801bbd41925dbaca39162731613fb289f4
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-09-03 (Thu, 03 Sep 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/combine-sse41-intrinsics.ll

  Log Message:
  -----------
  [X86][SSE] Fold select(X > -1, A, B) -> select(0 > X, B, A) (PR47404)

Help PBLENDVB peek through to the sign bit source of the selection mask by swapping the select condition and inputs.