[clang] [llvm] [NVPTX] Support __usAtomicCAS builtin (PR #99646)

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gonzalobg wrote:

> Sorry, I dont get it. Should I press the merge button? Because I dont have one... or I can't find it

No, @Artem-B will press it, I think there is nothing else for you to do. The current failures are not this PRs fault.
@Artem-B could we merge this despite the failures?

https://github.com/llvm/llvm-project/pull/99646