tra added a comment.

Is there more info about the issue? What does AMDGPU currently emit for the 
test case?

AFAICT from running it on CE (https://godbolt.org/z/ccq3vnbrM) llvm optimizes 
it to essentially `*y = *x` and generates a 1-byte load+store for both NVPTX 
and AMDGPU.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D135269/new/

https://reviews.llvm.org/D135269

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