[clang] [llvm] [openmp] [OpenMP] Use generic IR for the OpenMP DeviceRTL (PR #119091)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> First I will always consider NVVM reflect a giant hack. NVVM reflect cannot actually deal with the full range of wavesize issues. It is an incompatible ABI and the code should never be intermixed

It's a hack, but still better than whatever it is AMD does currently.

https://github.com/llvm/llvm-project/pull/119091