Xin Tong 4e46dacc3d Completely replace swift_retain_noresult with swift_retain. this is part of a series of commits ...

to remove reference forwarding for some of the ARC entry points. rdar://22724641. After this
commit, swift_retain_noresult will be completely replaced by swift_retain and LLVMARCOpts.cpp
will no longer canonicalize swift_retain to swift_retain_noresult as now swift_retain returns no
reference.

Swift SVN r32058

2015-09-18 01:51:17 +00:00

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