Reid Kleckner 5b64034a43 [dllexport] Sort out emission order of delayed exported classes ...

Relands r260194 with a fix. If we have a template that transitions from
an extern template to an explicitly instantiated dllexport template, we
would add that class to the delayed exported class list without flushing
it.

For explicit instantiations, we can just flush the list of delayed
classes immediately. We don't have to worry about the bug fixed in
r260194 in this case because explicit instantiations can only occur at
file and namespace scope.

Fixes PR26490.

llvm-svn: 262056

2016-02-26 19:51:02 +00:00

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