[PATCH] D126694: [C++20][Modules] Initial implementation of GMF decl elision.

[Iain Sandoe via Phabricator via cfe-commits]

iains added a comment.

on the serialisation-front; maybe it would be better just to stream the 3 bits of the ownership and then we only need to check on deserialisation that the owning module exists for anything other than !owned.


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https://reviews.llvm.org/D126694