Commits
Nadav Rotem committed 3e8c871c6a9
Emit calls to swift_willThrow as part of SILGen using a builtin. Calls to willThrow are marked as read-none so that the optimizer can remove them. The willThrow builtin is still generated for all throw/rethrow sites, but I plan to look at this next. rdar://20356658 Swift SVN r27877