[llvm] [AMDGPU] Eliminate likely-spurious execz checks (PR #117567)

[Krzysztof Drewniak via llvm-commits]

https://github.com/krzysz00 commented:

This feels like what I had in mind for the heuristic, but it seems like there's uncertainty there

https://github.com/llvm/llvm-project/pull/117567