[all-commits] [llvm/llvm-project] c6dee6: [GlobalISel][Mips] Sync G_UADDE and G_USUBE legali...

Craig Topper via All-commits all-commits at lists.llvm.org
Thu Aug 17 20:37:33 PDT 2023

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c6dee6982f733401e01b3b585370fa1886dd8201
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-08-17 (Thu, 17 Aug 2023)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
    M llvm/test/CodeGen/Mips/GlobalISel/legalizer/add.mir
    M llvm/test/CodeGen/Mips/GlobalISel/legalizer/sub.mir
    M llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/add.ll
    M llvm/test/CodeGen/Mips/GlobalISel/llvm-ir/sub.ll

  Log Message:
  [GlobalISel][Mips] Sync G_UADDE and G_USUBE legalization with LegalizeDAG.

This modifies the G_UADDE legalizaton to a version that looks shorter
on Mips and RISC-V when feeding the equivalent IR to SelectionDAG.
This also removes the boolean select from G_USUBE.

Comments taken from LegalizeDAG and tweaked.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D158232

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