Richard Smith c195c25b22 Don't speculatively emit VTTs for classes unless we are able to correctly emit references to all the functions they will (directly or indirectly) reference. ...

Summary:
This fixes a miscompile where we'd emit a VTT for a class that ends up
referencing an inline virtual member function that we can't actually
emit a body for (because we never instantiated it in the current TU),
which in a corner case of a corner case can lead to link errors.

Reviewers: rjmccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D54768

llvm-svn: 347692

2018-11-27 19:33:49 +00:00

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