tra added inline comments.

================
Comment at: clang/lib/Headers/__clang_hip_runtime_wrapper.h:73-74
+#define __HOST_DEVICE__                                                        
\
+  static __host__ __device__ inline __attribute__((always_inline))
+__HOST_DEVICE__ double _Cosh(double x, double y) { return cosh(x) * y; }
+__HOST_DEVICE__ float _FCosh(float x, float y) { return coshf(x) * y; }
----------------
I don't think we want to provide a HD implementation.
This will potentially change the meaning of these functions on the host side vs 
what they do in a C++ compilation.
It should probably be just `__device__`.

Next question is -- do we want to provide the definitions, or would just 
declarations be sufficient?
In other words -- are these functions needed for some standard C++ library 
functionality that we expect to work on the GPU?
If it's just to aid with overload resolution, declarations should do. 



Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D93638/new/

https://reviews.llvm.org/D93638

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