Joe Groff fb2fc93cbf IRGen: Followup fixes for handling subclasses of mixed-mode classes with missing ivars. ...

Following up on the fixes for rdar://problem/35330067. If a class inherits a class from another module with missing fields, we need to treat its size and alignment as opaque, just like the base class itself. We also need to lay out such  class at runtime, since we don't know the size, alignment, or field offsets at compile time; relying on the ObjC runtime alone will slide the ivar offsets, but not the Swift instance size and alignment. Fixes rdar://problem/35747485.

2017-11-29 19:21:36 -08:00

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