PATCH:

[Adrian Prantl]

Hi, this is my first patch to cfe-commits, so please review it rigorously!

As demonstrated by the test case we used to generate debug info for interfaces early on and thus missed out on additional private ivars that are added by an implementation. The patch disables the caching of the (possibly) incomplete DIType for InterfaceDecls that do not have an implementation.

Ensure that DIType is regenerated after we visited an implementation that adds ivars to an interface. Fixes rdar://13175234