[clang] [OpenMP][AMDGCN] creal/cimag/conj should be builtins/inlined on device. (PR #187831)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

I'm curious if https://github.com/llvm/llvm-project/pull/189999 helps at all. I'm not sure because I think that there is still some weirdness that prevents us from using the standard C library names for math.

https://github.com/llvm/llvm-project/pull/187831