[PATCH] D110802: [GlobalISel] Extend CombinerHelper::matchConstantOp() to match constant splat vectors

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
aemerson added reviewers: paquette, foad, arsenm.
aemerson added a project: LLVM.
Herald added subscribers: hiraditya, rovka.
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This allows the "x op 0 -> x" fold to optimize vector constant RHSs.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110802

Files:
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/combine-mul.mir
  llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-trivial-arith.mir

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