Commits
Doug Gregor committed 1789c4ccbc3
Collapse CollectionBridgedConversionExpr into CollectionUpcastConversionExpr. Semantically, these expressions handle the same thing: an upcast of a collection when the underlying element types of the source are subtypes of or can be bridged to subtypes of the destination. This reduces some branching in the type checker and eliminates duplication in SILGen. Swift SVN r18865