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

[Joseph Huber via llvm-commits]

jhuber6 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.

At a high level, if those work, we could just use them in `spirvintrin.h`. Do you happen to know what the backend does with them? They seem to be like what's going on here but I don't know when the target specific magic gets baked in.

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