[flang-commits] [flang] [mlir] [Flang][MLIR][OpenMP] Allow setting OMP_MAP_PTR_AND_OBJ by frontends (PR #84328)

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agozillon wrote:

This PR carves out a bit of the necessary change set from the derived type member map PR stack that can be made into it's own self sufficient PR as it is independent of the larger change set.  

The idea is to detach the setting of OMP_MAP_AND_OBJ_PTR from the lowering phase and allow it to be specifiable by the frontend where there's more information to set it. e.g. descriptor base addresses require the flag, but currently no other member mapping requires it and there is likely some other cases for Fortran (addendum of descriptors as a first) and more in the case of C/C++.

https://github.com/llvm/llvm-project/pull/84328