[all-commits] [llvm/llvm-project] 58c494: [RISCV] Add -march support for many of the S exten...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 58c494f47cf56a30bf50024d22661c75003db809
      https://github.com/llvm/llvm-project/commit/58c494f47cf56a30bf50024d22661c75003db809
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-02-01 (Thu, 01 Feb 2024)

  Changed paths:
    M clang/test/Preprocessor/riscv-target-features.c
    M llvm/docs/RISCVUsage.rst
    M llvm/lib/Support/RISCVISAInfo.cpp
    M llvm/lib/Target/RISCV/RISCVFeatures.td
    M llvm/test/CodeGen/RISCV/attributes.ll
    M llvm/test/MC/RISCV/attribute-arch.s
    M llvm/unittests/Support/RISCVISAInfoTest.cpp

  Log Message:
  -----------
  [RISCV] Add -march support for many of the S extensions mentioned in the profile specification. (#79399)

This is a good portion of the extensions mentioned in the RVA23 profile
here
https://github.com/riscv/riscv-profiles/blob/main/rva23-profile.adoc

I don't believe these add any new CSRs. Sstc does add new CSRs, but we
already added them without the extension name a while back.

I tried to keep the descriptions in RISCVFeatures.td fairly short since
the strings show up in `-print-supported-extensions`.