[all-commits] [llvm/llvm-project] c11b6b: [RISCV] Support __builtin_cpu_is

[Pengcheng Wang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c11b6b1b8af7454b35eef342162dc2cddf54b4de
      https://github.com/llvm/llvm-project/commit/c11b6b1b8af7454b35eef342162dc2cddf54b4de
  Author: Pengcheng Wang <wangpengcheng.pp at bytedance.com>
  Date:   2024-11-22 (Fri, 22 Nov 2024)

  Changed paths:
    M clang/lib/Basic/Targets/RISCV.cpp
    M clang/lib/Basic/Targets/RISCV.h
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/CodeGen/CodeGenFunction.h
    A clang/test/CodeGen/RISCV/builtin-cpu-is-error.c
    A clang/test/CodeGen/RISCV/builtin-cpu-is.c
    M llvm/include/llvm/TargetParser/RISCVTargetParser.h
    M llvm/lib/TargetParser/RISCVTargetParser.cpp

  Log Message:
  -----------
  [RISCV] Support __builtin_cpu_is

We have defined `__riscv_cpu_model` variable in #101449. It contains
`mvendorid`, `marchid` and `mimpid` fields which are read via system
call `sys_riscv_hwprobe`.

We can support `__builtin_cpu_is` via comparing values in compiler's
CPU definitions and `__riscv_cpu_model`.

This depends on #116202.

Reviewers: lenary, BeMg, kito-cheng, preames, lukel97

Reviewed By: lenary

Pull Request: https://github.com/llvm/llvm-project/pull/116231



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