[all-commits] [llvm/llvm-project] d17284: [DAG] SimplifyDemandedVectorElts - adjust demanded...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d172842b5100926cc882617a1874afc09f5fbaaf
      https://github.com/llvm/llvm-project/commit/d172842b5100926cc882617a1874afc09f5fbaaf
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-07-13 (Wed, 13 Jul 2022)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/test/CodeGen/X86/vselect-constants.ll

  Log Message:
  -----------
  [DAG] SimplifyDemandedVectorElts - adjust demanded elements for selection mask for known zero results

If an element is known zero from both selections then it shouldn't matter what the selection mask element is.