[all-commits] [llvm/llvm-project] 3e5698: [RISCV][GISel] Lower G_UADDE, G_UADDO, G_USUBE, an...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3e569883fa7d6029a776efc992dbc45c257a2aa1
      https://github.com/llvm/llvm-project/commit/3e569883fa7d6029a776efc992dbc45c257a2aa1
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-08-18 (Fri, 18 Aug 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-add.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-mul-ext.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-sub.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-add.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-mul-ext.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-sub.mir

  Log Message:
  -----------
  [RISCV][GISel] Lower G_UADDE, G_UADDO, G_USUBE, and G_USUBO

RISC-V doesn't have flag registers, we need to implement these
with add/sub and compares.

Remove the untested legalization for the signed versions. We can
add it back when we write tests.

Reviewed By: nitinjohnraj

Differential Revision: https://reviews.llvm.org/D157772