[all-commits] [llvm/llvm-project] a636e9: [RISCV] Teach RISCVOptWInstrs that zext.w is fixab...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a636e928c1d63c7eabe140832446f22e360ae001
      https://github.com/llvm/llvm-project/commit/a636e928c1d63c7eabe140832446f22e360ae001
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2026-09-15 (Tue, 15 Sep 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVOptWInstrs.cpp
    M llvm/test/CodeGen/RISCV/opt-w-instrs.mir

  Log Message:
  -----------
  [RISCV] Teach RISCVOptWInstrs that zext.w is fixable to sext.w. (#223559)

Note, in some cases erasing the zext.w and fixing an earlier
instruction would be even better but that requires more extensive
changes.



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