[all-commits] [llvm/llvm-project] 6b5198: [X86] Simplify broadcast mask detection with isUnd...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 6b5198f06b585e1fa3be530be2fbc76dd2d442c1
      https://github.com/llvm/llvm-project/commit/6b5198f06b585e1fa3be530be2fbc76dd2d442c1
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-09-28 (Mon, 28 Sep 2020)

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

  Log Message:
  -----------
  [X86] Simplify broadcast mask detection with isUndefOrEqual helper.

Add an additional isUndefOrEqual variant that matches an entire mask, not just a single value.


  Commit: e0820d87e3cd135a88ece609bef18a0401a85718
      https://github.com/llvm/llvm-project/commit/e0820d87e3cd135a88ece609bef18a0401a85718
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-09-28 (Mon, 28 Sep 2020)

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

  Log Message:
  -----------
  [X86] Flip isShuffleEquivalent argument order to match isTargetShuffleEquivalent

A while ago, we converted isShuffleEquivalent/isTargetShuffleEquivalent to both use IsElementEquivalent internally.

This allows us to make the shuffle args optional like isTargetShuffleEquivalent and update foldShuffleOfHorizOp to use isShuffleEquivalent (which it should as its using a ISD::VECTOR_SHUFFLE mask).


Compare: https://github.com/llvm/llvm-project/compare/31b3f32104db...e0820d87e3cd