[all-commits] [llvm/llvm-project] 4efc6e: [RISCV] Emit .option arch extensions without the "...

[Kito Cheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4efc6ef95cb041fae7e8fd60c4281b355418e747
      https://github.com/llvm/llvm-project/commit/4efc6ef95cb041fae7e8fd60c4281b355418e747
  Author: Kito Cheng <kito.cheng at sifive.com>
  Date:   2026-06-25 (Thu, 25 Jun 2026)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVAsmPrinter.cpp
    A llvm/test/CodeGen/RISCV/option-arch-experimental.ll

  Log Message:
  -----------
  [RISCV] Emit .option arch extensions without the "experimental-" prefix (#205471)

We currently emit the "experimental-" prefix in .option arch, e.g.
`.option arch, +experimental-zicfiss`, but the assembler can't parse
that back.

There are two ways to fix this:

1. Teach the assembler to accept `.option arch, +experimental-zicfiss`.
2. Emit `.option arch, +zicfiss` instead of `.option arch,
+experimental-zicfiss`.

This patch takes the second approach, which better fits the .option arch
syntax we defined. Experimental extensions are still guarded by
`-menable-experimental-extensions`.



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