[clang] [llvm] [SPIRV] GPU intrinsics (PR #131190)

[Alex Voicu via llvm-commits]

AlexVlx wrote:

> > not everything should end up in Clang, even though it is individually "convenient"
> 
> We should at least have some builtins for those SPIR-V intrinsics you listed. I think right now we only have `reflect`.

Probably, I think there's a sense that in general it's desirable to mirror all target intrinsics to Clang builtins by default, except extremely exotic ones.

https://github.com/llvm/llvm-project/pull/131190