[all-commits] [llvm/llvm-project] 172051: [AArch64][GlobalISel] Add identity combines to pos...

[Amara Emerson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 172051a1f4b1a007a2dbc46f8efb5e650b016d3b
      https://github.com/llvm/llvm-project/commit/172051a1f4b1a007a2dbc46f8efb5e650b016d3b
  Author: Amara Emerson <amara at apple.com>
  Date:   2021-07-26 (Mon, 26 Jul 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64Combine.td
    M llvm/test/CodeGen/AArch64/GlobalISel/arm64-atomic-128.ll
    A llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-combiner-identity.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/postlegalizercombiner-select.mir
    M llvm/test/CodeGen/AArch64/fold-global-offsets.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Add identity combines to post-legal combiner.

We see some shifts of zero emitted during legalization.

Differential Revision: https://reviews.llvm.org/D106816