[all-commits] [llvm/llvm-project] 91d59c: [X86][SSE] Add HADD/SUB support to combineHorizOpW...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 91d59cbf1b386999fe6c135a5e5726a6d83d4e39
      https://github.com/llvm/llvm-project/commit/91d59cbf1b386999fe6c135a5e5726a6d83d4e39
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-08-11 (Tue, 11 Aug 2020)

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

  Log Message:
  -----------
  [X86][SSE] Add HADD/SUB support to combineHorizOpWithShuffle

Handles some HOP(SHUFFLE,SHUFFLE) patterns and sets us up to improve some of the cases mentioned in PR41813.