[PATCH] D60907: [OpenMP][WIP] Add math functions support in OpenMP offloading

[Jonas Hahnfeld via Phabricator via cfe-commits]

Hahnfeld added a comment.

So the scheme is: `pow` is defined in `__clang_openmp_math.h` to call `__kmpc_pow`. This lives in `libomptarget-nvptx` (both bc and static lib) and just calls `pow` which works because `nvcc` and Clang in CUDA mode make sure that the call gets routed into `libdevice`?

Did you test that something like `pow(d, 2)` is optimized by LLVM to `d * d`? There's a pass doing so (can't recall the name) and from my previous attempts it didn't work well if you hid the function name instead of the known `pow` one.


Repository:
  rC Clang

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  https://reviews.llvm.org/D60907/new/

https://reviews.llvm.org/D60907