[PATCH] D118661: [AMDGPU] Check atomics aliasing in the clobbering annotation

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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MemorySSA considers any atomic a def to any operation it dominates
just like a barrier or fence. That is correct from memory state
perspective, but not required for the no-clobber metadata since
we are not using it for reordering. Skip such atomics during the
scan just like a barrier if it does not alias with the load.


https://reviews.llvm.org/D118661

Files:
  llvm/lib/Target/AMDGPU/AMDGPUAnnotateUniformValues.cpp
  llvm/test/CodeGen/AMDGPU/noclobber-barrier.ll

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