[PATCH] D110890: [GlobalISel] Port the udiv -> mul by constant combine.

[Amara Emerson via Phabricator via llvm-commits]

aemerson created this revision.
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This is a straight port from the equivalent DAG combine.

For AMDGPU, since it doesn't support legalizing G_MULH for s64 element vectors I've added an abort to the run line to get it to pass.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110890

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/CodeGen/GlobalISel/Utils.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/lib/CodeGen/GlobalISel/Utils.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/combine-udiv.ll
  llvm/test/CodeGen/AArch64/GlobalISel/combine-udiv.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i32.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/udiv.i64.ll

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