[all-commits] [llvm/llvm-project] 26bb1b: [RISCV] Add the zvl extension according to the v1....

[Yueh-Ting (eop) Chen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 26bb1b1dab8bc0646073e762a9f75f2dbcd18857
      https://github.com/llvm/llvm-project/commit/26bb1b1dab8bc0646073e762a9f75f2dbcd18857
  Author: eopXD <eop.chen at sifive.com>
  Date:   2022-01-14 (Fri, 14 Jan 2022)

  Changed paths:
    M clang/lib/Basic/Targets/RISCV.cpp
    M clang/test/Driver/riscv-arch.c
    M clang/test/Preprocessor/riscv-target-features.c
    M llvm/include/llvm/Support/RISCVISAInfo.h
    M llvm/lib/Support/RISCVISAInfo.cpp
    M llvm/lib/Target/RISCV/RISCV.td
    M llvm/lib/Target/RISCV/RISCVSubtarget.cpp
    M llvm/lib/Target/RISCV/RISCVSubtarget.h
    M llvm/test/CodeGen/RISCV/attributes.ll
    M llvm/test/MC/RISCV/attribute-arch.s

  Log Message:
  -----------
  [RISCV] Add the zvl extension according to the v1.0 spec

`zvl` is the new standard vector extension that specifies the minimum vector length of the vector extension.
The `zvl` extension is related to the `zve` extension and other updates that are added in v1.0.

According to https://github.com/riscv-non-isa/riscv-c-api-doc/pull/21,
Clang defines macro `__riscv_v_min_vlen` for `zvl` and it can be used for applications that uses the vector extension.
LLVM checks whether the option `riscv-v-vector-bits-min` (if specified) matches the `zvl*` extension specified.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D108694