[clang] [llvm] [openmp] [OpenMP][clang] 6.0: codegen+runtime for num_threads strict (PR #146346)

[Robert Imschweiler via llvm-commits]

ro-i wrote:

> Please split the PR into three: front end, device runtime, and libomp for faster and better review.

Ok, will do

https://github.com/llvm/llvm-project/pull/146346