[all-commits] [llvm/llvm-project] 4e3ba5: [X86] Add tests showing failure to fold MOVMSK(CMP...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4e3ba526bf48c19a602499acd1ebc4e6535d8f01
      https://github.com/llvm/llvm-project/commit/4e3ba526bf48c19a602499acd1ebc4e6535d8f01
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-01-30 (Sun, 30 Jan 2022)

  Changed paths:
    M llvm/test/CodeGen/X86/combine-movmsk.ll

  Log Message:
  -----------
  [X86] Add tests showing failure to fold MOVMSK(CMPEQ(AND(X,C1),0)) -> MOVMSK(NOT(SHL(X,C2)))

This would allow pow2 mask tests to avoid an unnecessary constant load.

Noticed while investigating how to extend MatchVectorAllZeroTest to support more allof/anyof patterns.