map -package:containers -package:base-compat-batteries -package:charset -package:Cabal-syntax -package:case-insensitive -package:invertible -package:filepath 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).