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Author SHA1 Message Date
David Majnemer 46e39cc6b0 [MS ABI] Correctly handle dllimport'd explicit instantiation declaration w/ vbases 
We gave a VBTable dllimport storage class and external linkage while
also providing an initializer.  An initializer is only valid if the
VBTable has available_externally linkage.  Fix this by setting the
linkage to available_externally in situ while generating the
initializer.

This fixes PR26686.

llvm-svn: 261535
 2016-02-22 17:22:08 +00:00
David Majnemer 2d8b2008c8 Revert "Revert r260388 "[MS ABI] Never reference dllimport'd vtables"" 
This reverts commit r260449.

We would supress our emission of vftable definitions if we thought
another translation unit would provide the definition because we saw an
explicit instantiation declaration.  This is not the case with
dllimport, we want to synthesize a definition of the vftable regardless.

This fixes PR26569.

llvm-svn: 260548
 2016-02-11 17:49:28 +00:00