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2 Commits

Author SHA1 Message Date
John McCall
590c25479d Use isa-masking to read the class object pointer from 
instances of Swift subclasses of ObjC classes.

We were already doing this in the runtime.  This patch
unhides the runtime's mask word (swift_isaMask) and makes
IR-gen take advantage of it when it can.

Swift SVN r21592
 2014-08-29 21:36:53 +00:00
John McCall
7b86817b3c Basic value structure for [weak] and [unowned] references. 
Add a bunch of new entrypoints and give them terrible
implementations.

Swift SVN r6322
 2013-07-17 09:20:20 +00:00