[PATCH] D133702: [GlobalISel] Simplify extended add/sub to add/sub with carry

[Jay Foad via Phabricator via llvm-commits]

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Simplify extended add/sub (with carry-in and carry-out) to add/sub with
carry (with carry-out only) if carry-in is known to be zero.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D133702

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/saddsat.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/ssubsat.ll

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