[all-commits] [llvm/llvm-project] 57a551: [X86][AVX] lowerShuffleAsLanePermuteAndShuffle - d...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 57a551a8dfa7560f4b838f8b96980852af2f73d5
      https://github.com/llvm/llvm-project/commit/57a551a8dfa7560f4b838f8b96980852af2f73d5
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-01-13 (Thu, 13 Jan 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-shuffle-256-v8.ll

  Log Message:
  -----------
  [X86][AVX] lowerShuffleAsLanePermuteAndShuffle - don't split element rotate patterns

Partial element rotate patterns (e.g. for element insertion on Issue #53124) were being split if every lane wasn't crossing, but really there's a good repeated mask hiding in there.