map -package:vector -package:conduit -package:containers -package:charset -is:exact -package:filepath -package:Cabal-syntax -is:exact -is:exact -package:base package:ghc is:module

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).