[all-commits] [llvm/llvm-project] 76c84e: [Driver][X86] Add flang visibility for -mapx-featu...

[Shengchen Kan via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 76c84e702bd9af7db2bb9373ba6de0508f1e57a9
      https://github.com/llvm/llvm-project/commit/76c84e702bd9af7db2bb9373ba6de0508f1e57a9
  Author: Shengchen Kan <shengchen.kan at intel.com>
  Date:   2024-07-03 (Wed, 03 Jul 2024)

  Changed paths:
    M clang/include/clang/Driver/Options.td
    M flang/test/Driver/target-cpu-features.f90

  Log Message:
  -----------
  [Driver][X86] Add flang visibility for -mapx-features= (#97525)

The default visibility of `m_x86_Features_Group` is `ClangOption,
CLOption`. For x86, we expose `-march` to flang but not `-m<cpuid>`.
`apxf` is special b/c it contains several independent features like
`egpr, ndd, ppx, push2pop2, ccmp, nf, cf` and `zu`.

Users may would like to turn on part of features in different cases

1. enable `ndd` only when writing a code-size sensitive library 
2. disable `ccmp`, `cf` when building component has strong security
request on caches

Hence, we expose `-mapx-features=` to flang for Fortran users.



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