[all-commits] [llvm/llvm-project] f8d190: [GlobalISel] Combine [S, U]SUBO (#116489)

[Thorsten Schütt via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f8d1905a24c16bf6db42d428672401156ef6a473
      https://github.com/llvm/llvm-project/commit/f8d1905a24c16bf6db42d428672401156ef6a473
  Author: Thorsten Schütt <schuett at gmail.com>
  Date:   2024-11-18 (Mon, 18 Nov 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
    M llvm/include/llvm/CodeGen/GlobalISel/GenericMachineInstrs.h
    M llvm/include/llvm/Target/GlobalISel/Combine.td
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/lib/Target/AArch64/AArch64Combine.td
    M llvm/test/CodeGen/AArch64/GlobalISel/combine-overflow.mir
    M llvm/test/CodeGen/AArch64/popcount.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/sdiv.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/srem.i64.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/urem.i64.ll

  Log Message:
  -----------
  [GlobalISel] Combine [S,U]SUBO (#116489)

We import the llvm.ssub.with.overflow.* Intrinsics, but the Legalizer
also builds them while legalizing other opcodes, see narrowScalarAddSub.



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