[flang-commits] [flang] [flang][OpenMP] Fix declare reduction accessibility in module scope (PR #197078)

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MattPD wrote:

@kparzysz, @klausler, @clementval: Hey, let me know if you can take a look when you get a chance. This adds accessibility checking for `declare reduction` in module scope (public/private visibility for the reduction identifier and its type).

https://github.com/llvm/llvm-project/pull/197078