Joe Groff 014f270516 SIL: Have project_existential_ref project to a protocol Self archetype. ...

This mirrors the behavior of project_existential and simplifies some special cases in SILGen. It unfortunately makes dynamic_lookup sequences a bit noisier because of the need to explicitly cast the projection from DynamicLookup.Self to Builtin.ObjCPointer, but I think this modeling is more solid and will fit better with my planned redesign of archetype_method/protocol_method.

Swift SVN r8572

2013-09-23 21:57:12 +00:00

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