[clang] [CIR][OpenMP] Add OpenMP-to-LLVM type conversion for CIR-to-LLVM lowering (PR #190063)

[Jan Leyonberg via cfe-commits]

jsjodin wrote:

> This looks good.
> 
> I don't see any equivalent code in the incubator. Was OpenMP just not working there?

I know that Luca Parigi was working on workshare loops here in PR #181841, and he was seeing the same issues, so likely this never worked in the incubator.

https://github.com/llvm/llvm-project/pull/190063