Commits
Joe Groff committed aee590a4b0d
IRGen: Enable C function calls from SIL. Preserve the AbstractCC of a function symbol when emitting a SIL ConstantRefInst by adding a new StaticFunction variant to LoweredValue. This lets us avoid a bunch of bitcasting noise for static functions that aren't used as values, and will lets us emit C-to-Swift-ABI thunks on demand when C functions are used as values. Swift SVN r4543