Safe Haskell	None
Language	Haskell98

Vectorise.Generic.Description

Description

Compute a description of the generic representation that we use for a user defined data type.

During vectorisation, we generate a PRepr and PA instance for each user defined data type. The PA dictionary contains methods to convert the user type to and from our generic representation. This module computes a description of what that generic representation is.

Synopsis

Documentation

data CompRepr Source

Describes the representation type of a data constructor field.

Constructors

Keep Type CoreExpr
Wrap Type

Instances

Outputable CompRepr

data ProdRepr Source

Describes the representation type of the fields / components of a constructor. If the data constructor has multiple fields then we bundle them together into a generic product type.

Constructors

EmptyProd	Data constructor has no fields.
UnaryProd CompRepr	Data constructor has a single field.
Prod	Data constructor has several fields.
Fields repr_tup_tc :: TyCon Representation tycon for the product (eg Tuple2) repr_ptup_tc :: TyCon PData version of the product tycon (eg PDataTuple2) repr_ptups_tc :: TyCon PDatas version of the product tycon (eg PDatasTuple2s) Not all lifted backends use `PDatas`. repr_comp_tys :: [Type] Types of each field. repr_comps :: [CompRepr] Generic representation types for each field.

Instances

Outputable ProdRepr

data ConRepr Source

Describes the representation type of a data constructor.

Constructors

ConRepr
Fields repr_dc :: DataCon repr_prod :: ProdRepr

Instances

Outputable ConRepr

data SumRepr Source

Describes the generic representation of a data type. If the data type has multiple constructors then we bundle them together into a generic sum type.

Constructors

EmptySum	Data type has no data constructors.
UnarySum ConRepr	Data type has a single constructor.
Sum	Data type has multiple constructors.
Fields repr_sum_tc :: TyCon Representation tycon for the sum (eg Sum2) repr_psum_tc :: TyCon PData version of the sum tycon (eg PDataSum2) This TyCon doesn't appear explicitly in the source program. See Note [PData TyCons]. repr_psums_tc :: TyCon PDatas version of the sum tycon (eg PDatasSum2) repr_sel_ty :: Type Type of the selector (eg Sel2) repr_sels_ty :: Type Type of multi-selector (eg Sel2s) repr_selsLength_v :: CoreExpr Function to get the length of a Sels of this type. repr_con_tys :: [Type] Type of each data constructor. repr_cons :: [ConRepr] Generic representation types of each data constructor.

Instances

Outputable SumRepr

tyConRepr :: TyCon -> VM SumRepr Source

Determine the generic representation of a data type, given its tycon.

sumReprType :: SumRepr -> VM Type Source

Yield the type of this sum representation.

compOrigType :: CompRepr -> Type Source

Yield the original component type of a data constructor component representation.