[all-commits] [llvm/llvm-project] c1ac6d: [AMDGPU] Add amdgpu-as MMRA for fences (#78572)

[Pierre van Houtryve via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c1ac6d2dd4ad3b15756d53b4b294843de4c141c2
      https://github.com/llvm/llvm-project/commit/c1ac6d2dd4ad3b15756d53b4b294843de4c141c2
  Author: Pierre van Houtryve <pierre.vanhoutryve at amd.com>
  Date:   2024-05-27 (Mon, 27 May 2024)

  Changed paths:
    M clang/docs/LanguageExtensions.rst
    M clang/include/clang/Basic/BuiltinsAMDGPU.def
    M clang/lib/CodeGen/CGBuiltin.cpp
    M clang/lib/CodeGen/CodeGenFunction.h
    M clang/test/CodeGenCXX/builtin-amdgcn-fence.cpp
    M clang/test/SemaOpenCL/builtins-amdgcn-error.cl
    M llvm/lib/Target/AMDGPU/SIMemoryLegalizer.cpp
    A llvm/test/CodeGen/AMDGPU/memory-legalizer-fence-mmra-global.ll
    A llvm/test/CodeGen/AMDGPU/memory-legalizer-fence-mmra-local.ll

  Log Message:
  -----------
  [AMDGPU] Add amdgpu-as MMRA for fences (#78572)

Using MMRAs, allow `builtin_amdgcn_fence` to emit fences that only
target one or more address spaces, instead of fencing all address spaces
at once.

This is done through a `amdgpu-as` MMRA. Currently focused on OpenCL
fences, but can very easily support more AS names and codegen on more
than just fences.



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