[flang] [llvm] [flang][MIF] Adding lowering for EVENT POST/WAIT statements (PR #210283)

[Dan Bonachea via llvm-commits]

https://github.com/bonachea requested changes to this pull request.

Thanks for the updates! This has made some great progress.

Unfortunately `event_type` coarray variables are still not being correctly default-initialized after `prif_allocate_coarray`, and that's critical to the correct operation of events.


https://github.com/llvm/llvm-project/pull/210283