OpenMP PSTL status

Hello friends,

Just a quick update. I have most of the backend functioning. At this point I am working on parallel partial sort. I think that is the last major piece I need to get done.

I have been saving the work on a branch of a fork of the llvm-project here: https://github.com/nadiasvertex/llvm-project/commits/christopher/pstl-openmp

Once all the tests are passing I’ll put up a review request. However, if anyone is interested in an early look at the stuff that is “done”, that’s where you can find it.

Thank you for all the help!

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