map -package:containers -package:charset -package:invertible -is:exact -package:base -package:base-prelude -package:conduit -package:case-insensitive package:ghc is:module -is:exact

The assignment of virtual registers to stack slots
RoughMap is an approximate finite map data structure keyed on [RoughMatchTc]. This is useful when keying maps on lists of Types (e.g. an instance head).