[PATCH] D75574: RFC: Implement objc_direct_protocol attribute to remove protocol metadata

[John McCall via Phabricator via cfe-commits]

rjmccall added a comment.

I don't think it'll actually error out at link time: protocol objects get emitted eagerly on use, cross-module linking is just a code-size optimization.  This actually has caused longstanding problems.

Anyway, I think it's fine to require forward declarations to have the attribute.


Repository:
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https://reviews.llvm.org/D75574