+{-# OPTIONS -fno-warn-missing-signatures #-}
+
module VectType ( vectTyCon, vectAndLiftType, vectType, vectTypeEnv,
-- arrSumArity, pdataCompTys, pdataCompVars,
buildPADict,
import VectCore
import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons )
+import BasicTypes
import CoreSyn
import CoreUtils
import CoreUnfold
import BuildTyCl
import DataCon
import TyCon
+import Class
import Type
import TypeRep
import Coercion
import OccName
import Id
import MkId
-import BasicTypes ( HsBang(..), boolToRecFlag,
- alwaysInlinePragma, dfunInlinePragma )
-import Var ( Var, TyVar, varType )
+import Var ( Var, TyVar, varType, varName )
import Name ( Name, getOccName )
import NameEnv
import MonadUtils ( zipWith3M, foldrM, concatMapM )
import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_, mapAndUnzipM )
-import Data.List ( inits, tails, zipWith4, zipWith5 )
+import Data.List
+import Data.Maybe
+
+debug = False
+dtrace s x = if debug then pprTrace "VectType" s x else x
-- ----------------------------------------------------------------------------
-- Types
-- | Vectorise a type.
vectType :: Type -> VM Type
-vectType ty | Just ty' <- coreView ty = vectType ty'
-vectType (TyVarTy tv) = return $ TyVarTy tv
-vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
-vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
-vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
- (mapM vectAndBoxType [ty1,ty2])
+vectType ty
+ | Just ty' <- coreView ty
+ = vectType ty'
+
+vectType (TyVarTy tv) = return $ TyVarTy tv
+vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
+vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
+vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
+ (mapM vectAndBoxType [ty1,ty2])
+
+-- For each quantified var we need to add a PA dictionary out the front of the type.
+-- So forall a. C a => a -> a
+-- turns into forall a. Cv a => PA a => a :-> a
vectType ty@(ForAllTy _ _)
- = do
- mdicts <- mapM paDictArgType tyvars
- mono_ty' <- vectType mono_ty
- return $ abstractType tyvars [dict | Just dict <- mdicts] mono_ty'
- where
- (tyvars, mono_ty) = splitForAllTys ty
+ = do
+ -- split the type into the quantified vars, its dictionaries and the body.
+ let (tyvars, tyBody) = splitForAllTys ty
+ let (tyArgs, tyResult) = splitFunTys tyBody
+
+ let (tyArgs_dict, tyArgs_regular)
+ = partition isDictType tyArgs
+
+ -- vectorise the body.
+ let tyBody' = mkFunTys tyArgs_regular tyResult
+ tyBody'' <- vectType tyBody'
+
+ -- vectorise the dictionary parameters.
+ dictsVect <- mapM vectType tyArgs_dict
+
+ -- make a PA dictionary for each of the type variables.
+ dictsPA <- liftM catMaybes $ mapM paDictArgType tyvars
+
+ -- pack it all back together.
+ return $ abstractType tyvars (dictsVect ++ dictsPA) tyBody''
vectType ty = cantVectorise "Can't vectorise type" (ppr ty)
-vectAndBoxType :: Type -> VM Type
-vectAndBoxType ty = vectType ty >>= boxType
-- | Add quantified vars and dictionary parameters to the front of a type.
abstractType :: [TyVar] -> [Type] -> Type -> Type
abstractType tyvars dicts = mkForAllTys tyvars . mkFunTys dicts
+
+-- | Check if some type is a type class dictionary.
+isDictType :: Type -> Bool
+isDictType ty
+ = case splitTyConApp_maybe ty of
+ Just (tyCon, _) -> isClassTyCon tyCon
+ _ -> False
+
+
-- ----------------------------------------------------------------------------
-- Boxing
boxType ty = return ty
+vectAndBoxType :: Type -> VM Type
+vectAndBoxType ty = vectType ty >>= boxType
+
+
-- ----------------------------------------------------------------------------
-- Type definitions
-- The type environment contains all the type things defined in a module.
vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [(Var, CoreExpr)])
vectTypeEnv env
- = do
+ = dtrace (ppr env)
+ $ do
cs <- readGEnv $ mk_map . global_tycons
-- Split the list of TyCons into the ones we have to vectorise vs the
-- types that use non Haskell98 features, as we don't handle those.
let (conv_tcs, keep_tcs) = classifyTyCons cs groups
keep_dcs = concatMap tyConDataCons keep_tcs
+
+ dtrace (text "conv_tcs = " <> ppr conv_tcs) $ return ()
+
zipWithM_ defTyCon keep_tcs keep_tcs
zipWithM_ defDataCon keep_dcs keep_dcs
new_tcs <- vectTyConDecls conv_tcs
+ dtrace (text "new_tcs = " <> ppr new_tcs) $ return ()
+
let orig_tcs = keep_tcs ++ conv_tcs
- vect_tcs = keep_tcs ++ new_tcs
+
+ -- We don't need to make new representation types for dictionary
+ -- constructors. The constructors are always fully applied, and we don't
+ -- need to lift them to arrays as a dictionary of a particular type
+ -- always has the same value.
+ let vect_tcs = filter (not . isClassTyCon)
+ $ keep_tcs ++ new_tcs
+
+ dtrace (text "vect_tcs = " <> ppr vect_tcs) $ return ()
+
+ mapM_ dumpTycon $ new_tcs
+
(_, binds, inst_tcs) <- fixV $ \ ~(dfuns', _, _) ->
do
defTyConPAs (zipLazy vect_tcs dfuns')
- reprs <- mapM tyConRepr vect_tcs
+ reprs <- mapM tyConRepr vect_tcs
repr_tcs <- zipWith3M buildPReprTyCon orig_tcs vect_tcs reprs
pdata_tcs <- zipWith3M buildPDataTyCon orig_tcs vect_tcs reprs
- dfuns <- sequence $ zipWith5 buildTyConBindings orig_tcs
- vect_tcs
- repr_tcs
- pdata_tcs
- reprs
- binds <- takeHoisted
+
+ dfuns <- sequence
+ $ zipWith5 buildTyConBindings
+ orig_tcs
+ vect_tcs
+ repr_tcs
+ pdata_tcs
+ reprs
+
+ binds <- takeHoisted
return (dfuns, binds, repr_tcs ++ pdata_tcs)
let all_new_tcs = new_tcs ++ inst_tcs
mapM_ (uncurry defTyCon) (zipLazy tcs tcs')
mapM vectTyConDecl tcs
-vectTyConDecl :: TyCon -> VM TyCon
-vectTyConDecl tc
- = do
- name' <- cloneName mkVectTyConOcc name
- rhs' <- vectAlgTyConRhs tc (algTyConRhs tc)
+dumpTycon :: TyCon -> VM ()
+dumpTycon tycon
+ | Just cls <- tyConClass_maybe tycon
+ = dtrace (vcat [ ppr tycon
+ , ppr [(m, varType m) | m <- classMethods cls ]])
+ $ return ()
+
+ | otherwise
+ = return ()
- liftDs $ buildAlgTyCon name'
- tyvars
- [] -- no stupid theta
- rhs'
- rec_flag -- FIXME: is this ok?
- False -- FIXME: no generics
- False -- not GADT syntax
- Nothing -- not a family instance
- where
- name = tyConName tc
- tyvars = tyConTyVars tc
- rec_flag = boolToRecFlag (isRecursiveTyCon tc)
+-- | Vectorise a single type construcrtor.
+vectTyConDecl :: TyCon -> VM TyCon
+vectTyConDecl tycon
+ -- a type class constructor.
+ -- TODO: check for no stupid theta, fds, assoc types.
+ | isClassTyCon tycon
+ , Just cls <- tyConClass_maybe tycon
+
+ = do -- make the name of the vectorised class tycon.
+ name' <- cloneName mkVectTyConOcc (tyConName tycon)
+
+ -- vectorise right of definition.
+ rhs' <- vectAlgTyConRhs tycon (algTyConRhs tycon)
+
+ -- vectorise method selectors.
+ -- This also adds a mapping between the original and vectorised method selector
+ -- to the state.
+ methods' <- mapM vectMethod
+ $ [(id, defMethSpecOfDefMeth meth)
+ | (id, meth) <- classOpItems cls]
+
+ -- keep the original recursiveness flag.
+ let rec_flag = boolToRecFlag (isRecursiveTyCon tycon)
+
+ -- Calling buildclass here attaches new quantifiers and dictionaries to the method types.
+ cls' <- liftDs
+ $ buildClass
+ False -- include unfoldings on dictionary selectors.
+ name' -- new name V_T:Class
+ (tyConTyVars tycon) -- keep original type vars
+ [] -- no stupid theta
+ [] -- no functional dependencies
+ [] -- no associated types
+ methods' -- method info
+ rec_flag -- whether recursive
+
+ let tycon' = mkClassTyCon name'
+ (tyConKind tycon)
+ (tyConTyVars tycon)
+ rhs'
+ cls'
+ rec_flag
+
+ return $ tycon'
+
+ -- a regular algebraic type constructor.
+ -- TODO: check for stupid theta, generaics, GADTS etc
+ | isAlgTyCon tycon
+ = do name' <- cloneName mkVectTyConOcc (tyConName tycon)
+ rhs' <- vectAlgTyConRhs tycon (algTyConRhs tycon)
+ let rec_flag = boolToRecFlag (isRecursiveTyCon tycon)
+
+ liftDs $ buildAlgTyCon
+ name' -- new name
+ (tyConTyVars tycon) -- keep original type vars.
+ [] -- no stupid theta.
+ rhs' -- new constructor defs.
+ rec_flag -- FIXME: is this ok?
+ False -- FIXME: no generics
+ False -- not GADT syntax
+ Nothing -- not a family instance
+
+ -- some other crazy thing that we don't handle.
+ | otherwise
+ = cantVectorise "Can't vectorise type constructor: " (ppr tycon)
+
+
+-- | Vectorise a class method.
+vectMethod :: (Id, DefMethSpec) -> VM (Name, DefMethSpec, Type)
+vectMethod (id, defMeth)
+ = do
+ -- Vectorise the method type.
+ typ' <- vectType (varType id)
+
+ -- Create a name for the vectorised method.
+ id' <- cloneId mkVectOcc id typ'
+ defGlobalVar id id'
+
+ -- When we call buildClass in vectTyConDecl, it adds foralls and dictionaries
+ -- to the types of each method. However, the types we get back from vectType
+ -- above already already have these, so we need to chop them off here otherwise
+ -- we'll get two copies in the final version.
+ let (_tyvars, tyBody) = splitForAllTys typ'
+ let (_dict, tyRest) = splitFunTy tyBody
+
+ return (Var.varName id', defMeth, tyRest)
+
+
+-- | Vectorise the RHS of an algebraic type.
vectAlgTyConRhs :: TyCon -> AlgTyConRhs -> VM AlgTyConRhs
vectAlgTyConRhs _ (DataTyCon { data_cons = data_cons
, is_enum = is_enum
return $ DataTyCon { data_cons = data_cons'
, is_enum = is_enum
}
-vectAlgTyConRhs tc _ = cantVectorise "Can't vectorise type definition:" (ppr tc)
+vectAlgTyConRhs tc _
+ = cantVectorise "Can't vectorise type definition:" (ppr tc)
+
+
+-- | Vectorise a data constructor.
+-- Vectorises its argument and return types.
vectDataCon :: DataCon -> VM DataCon
vectDataCon dc
| not . null $ dataConExTyVars dc
- = cantVectorise "Can't vectorise constructor (existentials):" (ppr dc)
+ = cantVectorise "Can't vectorise constructor (existentials):" (ppr dc)
+
| not . null $ dataConEqSpec dc
- = cantVectorise "Can't vectorise constructor (eq spec):" (ppr dc)
+ = cantVectorise "Can't vectorise constructor (eq spec):" (ppr dc)
+
| otherwise
= do
name' <- cloneName mkVectDataConOcc name
tycon' <- vectTyCon tycon
arg_tys <- mapM vectType rep_arg_tys
- liftDs $ buildDataCon name'
- False -- not infix
- (map (const HsNoBang) arg_tys)
- [] -- no labelled fields
- univ_tvs
- [] -- no existential tvs for now
- [] -- no eq spec for now
- [] -- no context
- arg_tys
- (mkFamilyTyConApp tycon' (mkTyVarTys univ_tvs))
- tycon'
+ liftDs $ buildDataCon
+ name'
+ False -- not infix
+ (map (const HsNoBang) arg_tys) -- strictness annots on args.
+ [] -- no labelled fields
+ univ_tvs -- universally quantified vars
+ [] -- no existential tvs for now
+ [] -- no eq spec for now
+ [] -- no context
+ arg_tys -- argument types
+ (mkFamilyTyConApp tycon' (mkTyVarTys univ_tvs)) -- return type
+ tycon' -- representation tycon
where
name = dataConName dc
univ_tvs = dataConUnivTyVars dc
("toArrPRepr", buildToArrPRepr),
("fromArrPRepr", buildFromArrPRepr)]
+
-- | Split the given tycons into two sets depending on whether they have to be
-- converted (first list) or not (second list). The first argument contains
-- information about the conversion status of external tycons:
-- ----------------------------------------------------------------------------
-- Conversions
-fromVect :: Type -> CoreExpr -> VM CoreExpr
-fromVect ty expr | Just ty' <- coreView ty = fromVect ty' expr
+-- | Build an expression that calls the vectorised version of some
+-- function from a `Closure`.
+--
+-- For example
+-- @
+-- \(x :: Double) ->
+-- \(y :: Double) ->
+-- ($v_foo $: x) $: y
+-- @
+--
+-- We use the type of the original binding to work out how many
+-- outer lambdas to add.
+--
+fromVect
+ :: Type -- ^ The type of the original binding.
+ -> CoreExpr -- ^ Expression giving the closure to use, eg @$v_foo@.
+ -> VM CoreExpr
+
+-- Convert the type to the core view if it isn't already.
+fromVect ty expr
+ | Just ty' <- coreView ty
+ = fromVect ty' expr
+
+-- For each function constructor in the original type we add an outer
+-- lambda to bind the parameter variable, and an inner application of it.
fromVect (FunTy arg_ty res_ty) expr
= do
arg <- newLocalVar (fsLit "x") arg_ty
body <- fromVect res_ty
$ Var apply `mkTyApps` [varg_ty, vres_ty] `mkApps` [expr, varg]
return $ Lam arg body
+
+-- If the type isn't a function then it's time to call on the closure.
fromVect ty expr
= identityConv ty >> return expr
+
toVect :: Type -> CoreExpr -> VM CoreExpr
toVect ty expr = identityConv ty >> return expr
+
identityConv :: Type -> VM ()
identityConv ty | Just ty' <- coreView ty = identityConv ty'
identityConv (TyConApp tycon tys)
projects / ghc-hetmet.git / blobdiff