[all-commits] [llvm/llvm-project] 23cb32: [X86] combineX86ShufflesRecursively - treat ISD::T...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 23cb32c6d5bda0919cc1ef129917ceb2dbf1b1b8
      https://github.com/llvm/llvm-project/commit/23cb32c6d5bda0919cc1ef129917ceb2dbf1b1b8
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-02-11 (Sat, 11 Feb 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/prefer-avx256-mask-shuffle.ll

  Log Message:
  -----------
  [X86] combineX86ShufflesRecursively - treat ISD::TRUNCATE as faux shuffle

getFauxShuffleMask can't handle ISD::TRUNCATE itself as it can't handle inputs that are larger than the output

Another step towards removing combineX86ShuffleChainWithExtract