[all-commits] [llvm/llvm-project] 210e6a: [GlobalISel] Simplify extended add/sub to add/sub ...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 210e6a993dd518703ebc6438539c000a012414f8
      https://github.com/llvm/llvm-project/commit/210e6a993dd518703ebc6438539c000a012414f8
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2022-09-12 (Mon, 12 Sep 2022)

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

  Log Message:
  -----------
  [GlobalISel] Simplify extended add/sub to add/sub with carry

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.

Differential Revision: https://reviews.llvm.org/D133702