[PATCH] D157772: [RISCV][GISel] Lower G_UADDE, G_UADDO, G_USUBE, and G_USUBO

[Craig Topper via Phabricator via llvm-commits]

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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.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157772

Files:
  llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-add.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv32/legalize-sub.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-add.mir
  llvm/test/CodeGen/RISCV/GlobalISel/legalizer/rv64/legalize-sub.mir

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