[PATCH] D87924: [AArch64][GlobalISel] Select all-zero G_BUILD_VECTOR into a zero mov.

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
aemerson added a reviewer: paquette.
aemerson added a project: LLVM.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls, rovka.
aemerson requested review of this revision.

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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D87924

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

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