[all-commits] [llvm/llvm-project] da1147: [AArch64][GlobalISel] Select all-zero G_BUILD_VECT...

[AE via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: da11479fd1fa62e59a16790f4dc2d80c9facf2da
      https://github.com/llvm/llvm-project/commit/da11479fd1fa62e59a16790f4dc2d80c9facf2da
  Author: Amara Emerson <amara at apple.com>
  Date:   2020-09-30 (Wed, 30 Sep 2020)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/select-build-vector.mir
    M llvm/test/CodeGen/AArch64/arm64-vabs.ll
    M llvm/test/CodeGen/AArch64/combine-loads.ll

  Log Message:
  -----------
  [AArch64][GlobalISel] Select all-zero G_BUILD_VECTOR into a zero mov.

Unfortunately the leaf SDAG patterns aren't supported yet so we need to do
this manually, but it's not a significant amount of code anyway.

Differential Revision: https://reviews.llvm.org/D87924