Commits
Joe Groff committed def2f979448
IRGen: Generalize 'hasSwiftRefcount' into an enum of reference counting mechanisms. Replace HeapTypeInfo::hasSwiftRefcount with a "getSwiftRefcounting" method, returning an enum indicating whether a heap object has native/ObjC/block/unknown refcounting semantics. Use _Block_copy and _Block_release for block refcounting. Swift SVN r16041