[all-commits] [llvm/llvm-project] 481413: [X86][SSE] matchShuffleWithPACK - generalize zero/...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 481413d3940402fdbef9f19963430e75409dc148
      https://github.com/llvm/llvm-project/commit/481413d3940402fdbef9f19963430e75409dc148
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-04-01 (Wed, 01 Apr 2020)

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

  Log Message:
  -----------
  [X86][SSE] matchShuffleWithPACK - generalize zero/signbits matching for any packed src type

First step toward making use of canLowerByDroppingEvenElements to match chains of PACKSS/PACKUS for compaction shuffles.

At the moment we still only match a single stage but the MatchPACK is now more general.