[all-commits] [llvm/llvm-project] 1dfd5c: [X86][AVX] combineHorizOpWithShuffle - support tar...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1dfd5c9ad8cf677fb4c9c3ccf39d7b1f20c397d3
      https://github.com/llvm/llvm-project/commit/1dfd5c9ad8cf677fb4c9c3ccf39d7b1f20c397d3
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-01-15 (Fri, 15 Jan 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/haddsub-2.ll
    M llvm/test/CodeGen/X86/haddsub-undef.ll

  Log Message:
  -----------
  [X86][AVX] combineHorizOpWithShuffle - support target shuffles in HOP(SHUFFLE(X,Y),SHUFFLE(X,Y)) -> SHUFFLE(HOP(X,Y))

Be more aggressive on (AVX2+) folds of lane shuffles of 256-bit horizontal ops by working on target/faux shuffles as well.