swift234

SIL: Map archetypes out of the interface parameter and result types of SILFunctionTypes.

When we see an uncurried nested PolymorphicFunctionType, such as <T> Foo -> <U> Bar -> Bas, pull the deepest generic parameter list out into the lowered SIL function type, so that dependent archetypes at all levels get properly represented in the generic parameter list, and we can map them to dependent generic types.

Also, apparently deserialized generic param lists get different archetypes from the corresponding deserialized generic param decls. Weird, but hopefully this will all be over soon, so roll with it, man.

Swift SVN r11809