Commits
Joe Groff committed fc13ea5ed0f
SIL/IRGen: Allow unowned/unmanaged storage to be optional at the SIL level. Allow @sil_unowned and @sil_unmanaged types to be optional. The sema for 'unowned' is a bit of a mess, and I'm not sure how to fix that right away. This is necessary in order for the unmanaged writeback for an AutoreleasingUnsafePointer<NSError?> or similar to compile correctly. Swift SVN r19148