[all-commits] [llvm/llvm-project] 8fd148: [LegalizeTypes][RISCV] Use signed promotion for UA...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8fd1484e301421c572f2a30a29164a9ba784f52a
      https://github.com/llvm/llvm-project/commit/8fd1484e301421c572f2a30a29164a9ba784f52a
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-08-12 (Mon, 12 Aug 2024)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/uadd_sat_plus.ll

  Log Message:
  -----------
  [LegalizeTypes][RISCV] Use signed promotion for UADDSAT if that's what the target prefers. (#102842)

As noted in #102781 we can promote UADDSAT if we use sign extend instead
of zero extend.

The custom handler for RISC-V was using SIGN_EXTEND when the Zbb
extension was enabled. With this change we no longer need the custom
code.



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