[PATCH] D110926: [GlobalISel] Support vectors in LegalizerHelper::narrowScalarMul

[Jay Foad via Phabricator via llvm-commits]

foad created this revision.
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Also remove some redundancy because the source and result
types of any multiply are always the same.

Change-Id: Ideb42fed5fa69de8ea32b537723551d9170ff30a


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110926

Files:
  llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-umulh.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-umulo.mir

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