[all-commits] [llvm/llvm-project] 262e42: [X86][SSE] Pull out combineToHorizontalAddSub help...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 262e4200d1977335d62dbab93b5d8e1f9f5c5e86
      https://github.com/llvm/llvm-project/commit/262e4200d1977335d62dbab93b5d8e1f9f5c5e86
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-05-16 (Sun, 16 May 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86][SSE] Pull out combineToHorizontalAddSub helper from inside (F)ADD/SUB combines (REAPPLIED). NFCI.

The intention is to be able to run this from additional locations (such as shuffle combining) in the future.

Reapplies rGb95a103808ac (after reversion at rGc012a388a15b), with SSE3/SSSE3 typo fix, test added at rG0afb10de1449.