Commits
Andrew Trick committed 292d9b3bb2d
Fix SILCodeMotion: do not move retains across isUniquelyReferenced. Sinking retains will simply make the unique check useless and eliminate Array copies even when we need them. Fix for: <rdar://problem/18109082> ARC: make _isUniquelyReferenced a barrier to avoid lost copies Swift SVN r21485