[clang] [Clang][HIP] Warn when __AMDGCN_WAVEFRONT_SIZE is used in host code without relying on target-dependent overload resolution (PR #109663)

[Artem Belevich via cfe-commits]

Artem-B wrote:

I'm curious why are those macros even defined on the host?

It looks like these macros should be handled in a way similar to `__HIP_ARCH__`.


https://github.com/llvm/llvm-project/pull/109663