[all-commits] [llvm/llvm-project] 27da15: [X86] __builtin_cpu_supports: support x86-64{, -v2, ...

[Fangrui Song via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 27da15381cbe2ac6fd1319f6409dbbab9a857b7b
      https://github.com/llvm/llvm-project/commit/27da15381cbe2ac6fd1319f6409dbbab9a857b7b
  Author: Fangrui Song <i at maskray.me>
  Date:   2023-08-25 (Fri, 25 Aug 2023)

  Changed paths:
    M clang/lib/Basic/Targets/X86.cpp
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/CodeGen/CodeGenFunction.cpp
    M clang/lib/CodeGen/CodeGenModule.cpp
    M clang/test/CodeGen/builtin-cpu-supports.c
    M clang/test/Sema/builtin-cpu-supports.c
    M llvm/include/llvm/TargetParser/X86TargetParser.def
    M llvm/include/llvm/TargetParser/X86TargetParser.h
    M llvm/lib/TargetParser/X86TargetParser.cpp

  Log Message:
  -----------
  [X86] __builtin_cpu_supports: support x86-64{,-v2,-v3,-v4}

GCC 12 (https://gcc.gnu.org/PR101696) allows
__builtin_cpu_supports("x86-64") (and -v2 -v3 -v4).
This patch ports the feature.

* Add `FEATURE_X86_64_{BASELINE,V2,V3,V4}` to enum ProcessorFeatures,
  but keep CPU_FEATURE_MAX unchanged to make
  FeatureInfos/FeatureInfos_WithPLUS happy.
* Change validateCpuSupports to allow `x86-64{,-v2,-v3,-v4}`
* Change getCpuSupportsMask to return `std::array<uint32_t, 4>` where
  `x86-64{,-v2,-v3,-v4}` set bits `FEATURE_X86_64_{BASELINE,V2,V3,V4}`.
* `target("x86-64")` and `cpu_dispatch(x86_64)` are invalid. Tested by commit 9de3b35ac9159d5bae6e6796cb91e4f877a07189

Close https://github.com/llvm/llvm-project/issues/59961

Reviewed By: pengfei

Differential Revision: https://reviews.llvm.org/D158811