[all-commits] [llvm/llvm-project] cb8a0b: [X86][SSE] Add LowerVectorAllZero helper for check...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: cb8a0ba829665a9e2b534e2b6ecc3ca94f9a3bc5
      https://github.com/llvm/llvm-project/commit/cb8a0ba829665a9e2b534e2b6ecc3ca94f9a3bc5
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-06-15 (Mon, 15 Jun 2020)

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

  Log Message:
  -----------
  [X86][SSE] Add LowerVectorAllZero helper for checking if all bits of a vector are zero.

Pull the lowering code out of LowerVectorAllZeroTest (and rename it MatchVectorAllZeroTest).

We should be able to reuse this in combineVectorSizedSetCCEquality as well.

Another cleanup to simplify D81547.