[PATCH] D95326: [GlobalISel] Implement widenScalar for carry-in add/sub

[Cassie Jones via Phabricator via llvm-commits]

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These are widened to a wider UADDE/USUBE, with the overflow value
unused, and with the same synthesis of a new overflow value as for the
O operations.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D95326

Files:
  llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
  llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-sadde.mir
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-ssube.mir
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-uadde.mir
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-usube.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-sadde.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-ssube.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-uadde.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-usube.mir

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