The two were identical and had identical fields except that ForeignInfo
still used initial capitalization for its field names. The type nested
within CalleeTypeInfo is removed and the leading caps are removed from
the top level ForeignInfo type.
When lowering the type for `@objc` entry points of async declarations, restore
the original ObjC signature with the completion handler argument in the lowered
SIL type.
ground work for the syntactic bridging peephole.
- Pass source and dest formal types to the bridging routines in addition
to the dest lowered type. The dest lowered type is still necessary
in order to handle non-standard abstraction patterns for the dest type.
- Change bridging abstraction patterns to store bridged formal types
instead of the formal type.
- Improve how SIL type lowering deals with import-as-member patterns.
- Fix some AST bugs where inadequate information was being stored in
various expressions.
- Introduce the idea of a converting SGFContext and use it to regularize
the existing id-as-Any conversion peephole.
- Improve various places in SILGen to emit directly into contexts.
