map -package:containers -package:basement -package:conduit -is:exact -package:pipes -package:base -is:exact -package:os-string package:ghc -is:exact 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).