Commits
Michael Gottesman committed af52f7c4f94
[irgen] Now that swift_unknown{Retain,Release} are implemented, have IRGen emit them.
This gives us some nice speedups on the perf test suite.
Phonebook 19508 15378 26.86%
Dictionary 31664 1384 20.23%
LinkedList 1902 1583 20.15%
SortStrings 1402 1168 20.03%
StrToInt 1014 861 17.77%
EditDistance 703 633 11.06%
Dictionary 21206 1088 10.85%
Dictionary 1354 1225 10.53%
StringWalk 1361 1246 9.23%
rdar://18314006
Swift SVN r21959