+{-# OPTIONS -fno-warn-missing-signatures #-}
+
module VectType ( vectTyCon, vectAndLiftType, vectType, vectTypeEnv,
-- arrSumArity, pdataCompTys, pdataCompVars,
buildPADict,
import VectMonad
import VectUtils
-import VectCore
+import Vectorise.Env
+import Vectorise.Vect
import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons )
+import BasicTypes
import CoreSyn
import CoreUtils
+import CoreUnfold
import MkCore ( mkWildCase )
import BuildTyCl
import DataCon
import TyCon
+import Class
import Type
import TypeRep
import Coercion
import FamInstEnv ( FamInst, mkLocalFamInst )
import OccName
+import Id
import MkId
-import BasicTypes ( StrictnessMark(..), boolToRecFlag )
-import Var ( Var, TyVar )
+import Var ( Var, TyVar, varType, varName )
import Name ( Name, getOccName )
import NameEnv
import Outputable
import FastString
+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 constructor.
vectTyCon :: TyCon -> VM TyCon
vectTyCon tc
| isFunTyCon tc = builtin closureTyCon
| isBoxedTupleTyCon tc = return tc
| isUnLiftedTyCon tc = return tc
- | otherwise = maybeCantVectoriseM "Tycon not vectorised:" (ppr tc)
- $ lookupTyCon tc
+ | otherwise
+ = maybeCantVectoriseM "Tycon not vectorised: " (ppr tc)
+ $ lookupTyCon tc
+
vectAndLiftType :: Type -> VM (Type, Type)
vectAndLiftType ty | Just ty' <- coreView ty = vectAndLiftType ty'
(tyvars, mono_ty) = splitForAllTys ty
+-- | 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
case r of
Just tycon' -> return $ mkTyConApp tycon' []
Nothing -> return ty
+
boxType ty = return ty
+vectAndBoxType :: Type -> VM Type
+vectAndBoxType ty = vectType ty >>= boxType
+
+
-- ----------------------------------------------------------------------------
-- Type definitions
type TyConGroup = ([TyCon], UniqSet TyCon)
+-- | Vectorise a type environment.
+-- 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
+ -- ones we can pass through unchanged. We also pass through algebraic
+ -- 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
- repr_tcs <- zipWithM buildPReprTyCon orig_tcs vect_tcs
- pdata_tcs <- zipWithM buildPDataTyCon orig_tcs vect_tcs
- dfuns <- mapM mkPADFun vect_tcs
- defTyConPAs (zip vect_tcs dfuns)
- binds <- sequence (zipWith5 buildTyConBindings orig_tcs
- vect_tcs
- repr_tcs
- pdata_tcs
- dfuns)
+ -- 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
- let all_new_tcs = new_tcs ++ repr_tcs ++ pdata_tcs
+
+ (_, binds, inst_tcs) <- fixV $ \ ~(dfuns', _, _) ->
+ do
+ defTyConPAs (zipLazy vect_tcs dfuns')
+ 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
+ return (dfuns, binds, repr_tcs ++ pdata_tcs)
+
+ let all_new_tcs = new_tcs ++ inst_tcs
let new_env = extendTypeEnvList env
(map ATyCon all_new_tcs
++ [ADataCon dc | tc <- all_new_tcs
, dc <- tyConDataCons tc])
- return (new_env, map mkLocalFamInst (repr_tcs ++ pdata_tcs), concat binds)
+ return (new_env, map mkLocalFamInst inst_tcs, binds)
where
tycons = typeEnvTyCons env
groups = tyConGroups tycons
mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env]
+-- | Vectorise some (possibly recursively defined) type constructors.
vectTyConDecls :: [TyCon] -> VM [TyCon]
vectTyConDecls tcs = fixV $ \tcs' ->
do
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 NotMarkedStrict) 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
mk_fam_inst fam_tc arg_tc
= (fam_tc, [mkTyConApp arg_tc . mkTyVarTys $ tyConTyVars arg_tc])
-buildPReprTyCon :: TyCon -> TyCon -> VM TyCon
-buildPReprTyCon orig_tc vect_tc
+
+buildPReprTyCon :: TyCon -> TyCon -> SumRepr -> VM TyCon
+buildPReprTyCon orig_tc vect_tc repr
= do
name <- cloneName mkPReprTyConOcc (tyConName orig_tc)
- rhs_ty <- buildPReprType vect_tc
+ -- rhs_ty <- buildPReprType vect_tc
+ rhs_ty <- sumReprType repr
prepr_tc <- builtin preprTyCon
liftDs $ buildSynTyCon name
tyvars
where
tyvars = tyConTyVars vect_tc
-buildPReprType :: TyCon -> VM Type
-buildPReprType vect_tc = sum_type . map dataConRepArgTys $ tyConDataCons vect_tc
+data CompRepr = Keep Type
+ CoreExpr -- PR dictionary for the type
+ | Wrap Type
+
+data ProdRepr = EmptyProd
+ | UnaryProd CompRepr
+ | Prod { repr_tup_tc :: TyCon -- representation tuple tycon
+ , repr_ptup_tc :: TyCon -- PData representation tycon
+ , repr_comp_tys :: [Type] -- representation types of
+ , repr_comps :: [CompRepr] -- components
+ }
+data ConRepr = ConRepr DataCon ProdRepr
+
+data SumRepr = EmptySum
+ | UnarySum ConRepr
+ | Sum { repr_sum_tc :: TyCon -- representation sum tycon
+ , repr_psum_tc :: TyCon -- PData representation tycon
+ , repr_sel_ty :: Type -- type of selector
+ , repr_con_tys :: [Type] -- representation types of
+ , repr_cons :: [ConRepr] -- components
+ }
+
+tyConRepr :: TyCon -> VM SumRepr
+tyConRepr tc = sum_repr (tyConDataCons tc)
where
- sum_type [] = voidType
- sum_type [tys] = prod_type tys
- sum_type _ = do
- (sum_tc, _, _, args) <- reprSumTyCons vect_tc
- return $ mkTyConApp sum_tc args
-
- prod_type [] = voidType
- prod_type [ty] = return ty
- prod_type tys = do
- prod_tc <- builtin (prodTyCon (length tys))
- return $ mkTyConApp prod_tc tys
-
-reprSumTyCons :: TyCon -> VM (TyCon, TyCon, Type, [Type])
-reprSumTyCons vect_tc
- = do
- tc <- builtin (sumTyCon arity)
- args <- mapM (prod . dataConRepArgTys) cons
- (pdata_tc, _) <- pdataReprTyCon (mkTyConApp tc args)
- sel_ty <- builtin (selTy arity)
- return (tc, pdata_tc, sel_ty, args)
- where
- cons = tyConDataCons vect_tc
- arity = length cons
-
- prod [] = voidType
- prod [ty] = return ty
- prod tys = do
- prod_tc <- builtin (prodTyCon (length tys))
- return $ mkTyConApp prod_tc tys
-
-buildToPRepr :: TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildToPRepr vect_tc repr_tc _
+ sum_repr [] = return EmptySum
+ sum_repr [con] = liftM UnarySum (con_repr con)
+ sum_repr cons = do
+ rs <- mapM con_repr cons
+ sum_tc <- builtin (sumTyCon arity)
+ tys <- mapM conReprType rs
+ (psum_tc, _) <- pdataReprTyCon (mkTyConApp sum_tc tys)
+ sel_ty <- builtin (selTy arity)
+ return $ Sum { repr_sum_tc = sum_tc
+ , repr_psum_tc = psum_tc
+ , repr_sel_ty = sel_ty
+ , repr_con_tys = tys
+ , repr_cons = rs
+ }
+ where
+ arity = length cons
+
+ con_repr con = liftM (ConRepr con) (prod_repr (dataConRepArgTys con))
+
+ prod_repr [] = return EmptyProd
+ prod_repr [ty] = liftM UnaryProd (comp_repr ty)
+ prod_repr tys = do
+ rs <- mapM comp_repr tys
+ tup_tc <- builtin (prodTyCon arity)
+ tys' <- mapM compReprType rs
+ (ptup_tc, _) <- pdataReprTyCon (mkTyConApp tup_tc tys')
+ return $ Prod { repr_tup_tc = tup_tc
+ , repr_ptup_tc = ptup_tc
+ , repr_comp_tys = tys'
+ , repr_comps = rs
+ }
+ where
+ arity = length tys
+
+ comp_repr ty = liftM (Keep ty) (prDictOfType ty)
+ `orElseV` return (Wrap ty)
+
+sumReprType :: SumRepr -> VM Type
+sumReprType EmptySum = voidType
+sumReprType (UnarySum r) = conReprType r
+sumReprType (Sum { repr_sum_tc = sum_tc, repr_con_tys = tys })
+ = return $ mkTyConApp sum_tc tys
+
+conReprType :: ConRepr -> VM Type
+conReprType (ConRepr _ r) = prodReprType r
+
+prodReprType :: ProdRepr -> VM Type
+prodReprType EmptyProd = voidType
+prodReprType (UnaryProd r) = compReprType r
+prodReprType (Prod { repr_tup_tc = tup_tc, repr_comp_tys = tys })
+ = return $ mkTyConApp tup_tc tys
+
+compReprType :: CompRepr -> VM Type
+compReprType (Keep ty _) = return ty
+compReprType (Wrap ty) = do
+ wrap_tc <- builtin wrapTyCon
+ return $ mkTyConApp wrap_tc [ty]
+
+compOrigType :: CompRepr -> Type
+compOrigType (Keep ty _) = ty
+compOrigType (Wrap ty) = ty
+
+buildToPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
+buildToPRepr vect_tc repr_tc _ repr
= do
let arg_ty = mkTyConApp vect_tc ty_args
res_ty <- mkPReprType arg_ty
arg <- newLocalVar (fsLit "x") arg_ty
- result <- to_sum (Var arg) arg_ty res_ty (tyConDataCons vect_tc)
+ result <- to_sum (Var arg) arg_ty res_ty repr
return $ Lam arg result
where
ty_args = mkTyVarTys (tyConTyVars vect_tc)
- wrap = wrapFamInstBody repr_tc ty_args
+ wrap_repr_inst = wrapFamInstBody repr_tc ty_args
- to_sum _ _ _ []
+ to_sum _ _ _ EmptySum
= do
void <- builtin voidVar
- return $ wrap (Var void)
+ return $ wrap_repr_inst $ Var void
- to_sum arg arg_ty res_ty [con]
+ to_sum arg arg_ty res_ty (UnarySum r)
= do
- (prod, vars) <- to_prod (dataConRepArgTys con)
+ (pat, vars, body) <- con_alt r
return $ mkWildCase arg arg_ty res_ty
- [(DataAlt con, vars, wrap prod)]
+ [(pat, vars, wrap_repr_inst body)]
- to_sum arg arg_ty res_ty cons
+ to_sum arg arg_ty res_ty (Sum { repr_sum_tc = sum_tc
+ , repr_con_tys = tys
+ , repr_cons = cons })
= do
- (prods, vars) <- mapAndUnzipM (to_prod . dataConRepArgTys) cons
- (sum_tc, _, _, sum_ty_args) <- reprSumTyCons vect_tc
- let sum_cons = [mkConApp con (map Type sum_ty_args)
- | con <- tyConDataCons sum_tc]
- return . mkWildCase arg arg_ty res_ty
- $ zipWith4 mk_alt cons vars sum_cons prods
- where
- mk_alt con vars sum_con expr
- = (DataAlt con, vars, wrap $ sum_con `App` expr)
+ alts <- mapM con_alt cons
+ let alts' = [(pat, vars, wrap_repr_inst
+ $ mkConApp sum_con (map Type tys ++ [body]))
+ | ((pat, vars, body), sum_con)
+ <- zip alts (tyConDataCons sum_tc)]
+ return $ mkWildCase arg arg_ty res_ty alts'
+
+ con_alt (ConRepr con r)
+ = do
+ (vars, body) <- to_prod r
+ return (DataAlt con, vars, body)
- to_prod []
+ to_prod EmptyProd
= do
void <- builtin voidVar
- return (Var void, [])
- to_prod [ty]
+ return ([], Var void)
+
+ to_prod (UnaryProd comp)
= do
- var <- newLocalVar (fsLit "x") ty
- return (Var var, [var])
- to_prod tys
+ var <- newLocalVar (fsLit "x") (compOrigType comp)
+ body <- to_comp (Var var) comp
+ return ([var], body)
+
+ to_prod(Prod { repr_tup_tc = tup_tc
+ , repr_comp_tys = tys
+ , repr_comps = comps })
= do
- prod_con <- builtin (prodDataCon (length tys))
- vars <- newLocalVars (fsLit "x") tys
- return (mkConApp prod_con (map Type tys ++ map Var vars), vars)
+ vars <- newLocalVars (fsLit "x") (map compOrigType comps)
+ exprs <- zipWithM to_comp (map Var vars) comps
+ return (vars, mkConApp tup_con (map Type tys ++ exprs))
+ where
+ [tup_con] = tyConDataCons tup_tc
-buildFromPRepr :: TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildFromPRepr vect_tc repr_tc _
+ to_comp expr (Keep _ _) = return expr
+ to_comp expr (Wrap ty) = do
+ wrap_tc <- builtin wrapTyCon
+ return $ wrapNewTypeBody wrap_tc [ty] expr
+
+
+buildFromPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
+buildFromPRepr vect_tc repr_tc _ repr
= do
arg_ty <- mkPReprType res_ty
arg <- newLocalVar (fsLit "x") arg_ty
result <- from_sum (unwrapFamInstScrut repr_tc ty_args (Var arg))
- (tyConDataCons vect_tc)
+ repr
return $ Lam arg result
where
ty_args = mkTyVarTys (tyConTyVars vect_tc)
res_ty = mkTyConApp vect_tc ty_args
- from_sum _ [] = pprPanic "buildFromPRepr" (ppr vect_tc)
- from_sum expr [con] = from_prod expr con
- from_sum expr cons
+ from_sum _ EmptySum
= do
- (sum_tc, _, _, sum_ty_args) <- reprSumTyCons vect_tc
- let sum_cons = tyConDataCons sum_tc
- vars <- newLocalVars (fsLit "x") sum_ty_args
- prods <- zipWithM from_prod (map Var vars) cons
- return . mkWildCase expr (exprType expr) res_ty
- $ zipWith3 mk_alt sum_cons vars prods
- where
- mk_alt con var expr = (DataAlt con, [var], expr)
-
- from_prod expr con
- = case dataConRepArgTys con of
- [] -> return $ apply_con []
- [_] -> return $ apply_con [expr]
- tys -> do
- prod_con <- builtin (prodDataCon (length tys))
- vars <- newLocalVars (fsLit "y") tys
- return $ mkWildCase expr (exprType expr) res_ty
- [(DataAlt prod_con, vars, apply_con (map Var vars))]
+ dummy <- builtin fromVoidVar
+ return $ Var dummy `App` Type res_ty
+
+ from_sum expr (UnarySum r) = from_con expr r
+ from_sum expr (Sum { repr_sum_tc = sum_tc
+ , repr_con_tys = tys
+ , repr_cons = cons })
+ = do
+ vars <- newLocalVars (fsLit "x") tys
+ es <- zipWithM from_con (map Var vars) cons
+ return $ mkWildCase expr (exprType expr) res_ty
+ [(DataAlt con, [var], e)
+ | (con, var, e) <- zip3 (tyConDataCons sum_tc) vars es]
+
+ from_con expr (ConRepr con r)
+ = from_prod expr (mkConApp con $ map Type ty_args) r
+
+ from_prod _ con EmptyProd = return con
+ from_prod expr con (UnaryProd r)
+ = do
+ e <- from_comp expr r
+ return $ con `App` e
+
+ from_prod expr con (Prod { repr_tup_tc = tup_tc
+ , repr_comp_tys = tys
+ , repr_comps = comps
+ })
+ = do
+ vars <- newLocalVars (fsLit "y") tys
+ es <- zipWithM from_comp (map Var vars) comps
+ return $ mkWildCase expr (exprType expr) res_ty
+ [(DataAlt tup_con, vars, con `mkApps` es)]
where
- apply_con exprs = mkConApp con (map Type ty_args) `mkApps` exprs
+ [tup_con] = tyConDataCons tup_tc
-buildToArrPRepr :: TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildToArrPRepr vect_tc prepr_tc pdata_tc
+ from_comp expr (Keep _ _) = return expr
+ from_comp expr (Wrap ty)
+ = do
+ wrap <- builtin wrapTyCon
+ return $ unwrapNewTypeBody wrap [ty] expr
+
+
+buildToArrPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
+buildToArrPRepr vect_tc prepr_tc pdata_tc r
= do
arg_ty <- mkPDataType el_ty
res_ty <- mkPDataType =<< mkPReprType el_ty
scrut = unwrapFamInstScrut pdata_tc ty_args (Var arg)
- (vars, result) <- to_sum (tyConDataCons vect_tc)
+ (vars, result) <- to_sum r
return . Lam arg
$ mkWildCase scrut (mkTyConApp pdata_tc ty_args) res_ty
[pdata_dc] = tyConDataCons pdata_tc
- to_sum [] = do
- pvoid <- builtin pvoidVar
- return ([], Var pvoid)
- to_sum [con] = to_prod con
- to_sum cons = do
- (vars, exprs) <- mapAndUnzipM to_prod cons
- (_, pdata_tc, sel_ty, arg_tys) <- reprSumTyCons vect_tc
- sel <- newLocalVar (fsLit "sel") sel_ty
- let [pdata_con] = tyConDataCons pdata_tc
- result = wrapFamInstBody pdata_tc arg_tys
- . mkConApp pdata_con
- $ map Type arg_tys ++ (Var sel : exprs)
- return (sel : concat vars, result)
-
- to_prod con
- | [] <- tys = do
- pvoid <- builtin pvoidVar
- return ([], Var pvoid)
- | [ty] <- tys = do
- var <- newLocalVar (fsLit "x") ty
- return ([var], Var var)
- | otherwise
- = do
- vars <- newLocalVars (fsLit "x") tys
- prod_tc <- builtin (prodTyCon (length tys))
- (pdata_prod_tc, _) <- pdataReprTyCon (mkTyConApp prod_tc tys)
- let [pdata_prod_con] = tyConDataCons pdata_prod_tc
- result = wrapFamInstBody pdata_prod_tc tys
- . mkConApp pdata_prod_con
- $ map Type tys ++ map Var vars
- return (vars, result)
+
+ to_sum EmptySum = do
+ pvoid <- builtin pvoidVar
+ return ([], Var pvoid)
+ to_sum (UnarySum r) = to_con r
+ to_sum (Sum { repr_psum_tc = psum_tc
+ , repr_sel_ty = sel_ty
+ , repr_con_tys = tys
+ , repr_cons = cons
+ })
+ = do
+ (vars, exprs) <- mapAndUnzipM to_con cons
+ sel <- newLocalVar (fsLit "sel") sel_ty
+ return (sel : concat vars, mk_result (Var sel) exprs)
+ where
+ [psum_con] = tyConDataCons psum_tc
+ mk_result sel exprs = wrapFamInstBody psum_tc tys
+ $ mkConApp psum_con
+ $ map Type tys ++ (sel : exprs)
+
+ to_con (ConRepr _ r) = to_prod r
+
+ to_prod EmptyProd = do
+ pvoid <- builtin pvoidVar
+ return ([], Var pvoid)
+ to_prod (UnaryProd r)
+ = do
+ pty <- mkPDataType (compOrigType r)
+ var <- newLocalVar (fsLit "x") pty
+ expr <- to_comp (Var var) r
+ return ([var], expr)
+
+ to_prod (Prod { repr_ptup_tc = ptup_tc
+ , repr_comp_tys = tys
+ , repr_comps = comps })
+ = do
+ ptys <- mapM (mkPDataType . compOrigType) comps
+ vars <- newLocalVars (fsLit "x") ptys
+ es <- zipWithM to_comp (map Var vars) comps
+ return (vars, mk_result es)
where
- tys = dataConRepArgTys con
+ [ptup_con] = tyConDataCons ptup_tc
+ mk_result exprs = wrapFamInstBody ptup_tc tys
+ $ mkConApp ptup_con
+ $ map Type tys ++ exprs
+
+ to_comp expr (Keep _ _) = return expr
+
+ -- FIXME: this is bound to be wrong!
+ to_comp expr (Wrap ty)
+ = do
+ wrap_tc <- builtin wrapTyCon
+ (pwrap_tc, _) <- pdataReprTyCon (mkTyConApp wrap_tc [ty])
+ return $ wrapNewTypeBody pwrap_tc [ty] expr
-buildFromArrPRepr :: TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildFromArrPRepr vect_tc prepr_tc pdata_tc
+
+buildFromArrPRepr :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
+buildFromArrPRepr vect_tc prepr_tc pdata_tc r
= do
arg_ty <- mkPDataType =<< mkPReprType el_ty
res_ty <- mkPDataType el_ty
scrut = mkCoerce co (Var arg)
- (args, mk) <- from_sum res_ty scrut (tyConDataCons vect_tc)
+ mk_result args = wrapFamInstBody pdata_tc var_tys
+ $ mkConApp pdata_con
+ $ map Type var_tys ++ args
+
+ (expr, _) <- fixV $ \ ~(_, args) ->
+ from_sum res_ty (mk_result args) scrut r
+
+ return $ Lam arg expr
+
+ -- (args, mk) <- from_sum res_ty scrut r
- let result = wrapFamInstBody pdata_tc var_tys
- . mkConApp pdata_dc
- $ map Type var_tys ++ args
+ -- let result = wrapFamInstBody pdata_tc var_tys
+ -- . mkConApp pdata_dc
+ -- $ map Type var_tys ++ args
- return $ Lam arg (mk result)
+ -- return $ Lam arg (mk result)
where
var_tys = mkTyVarTys $ tyConTyVars vect_tc
el_ty = mkTyConApp vect_tc var_tys
- [pdata_dc] = tyConDataCons pdata_tc
+ [pdata_con] = tyConDataCons pdata_tc
- from_sum res_ty expr [] = return ([], mk)
- where
- mk body = mkWildCase expr (exprType expr) res_ty [(DEFAULT, [], body)]
- from_sum res_ty expr [con] = from_prod res_ty expr con
- from_sum res_ty expr cons
+ from_sum _ res _ EmptySum = return (res, [])
+ from_sum res_ty res expr (UnarySum r) = from_con res_ty res expr r
+ from_sum res_ty res expr (Sum { repr_psum_tc = psum_tc
+ , repr_sel_ty = sel_ty
+ , repr_con_tys = tys
+ , repr_cons = cons })
= do
- (_, pdata_tc, sel_ty, arg_tys) <- reprSumTyCons vect_tc
sel <- newLocalVar (fsLit "sel") sel_ty
- vars <- newLocalVars (fsLit "xs") arg_tys
- rs <- zipWithM (from_prod res_ty) (map Var vars) cons
- let (prods, mks) = unzip rs
- [pdata_con] = tyConDataCons pdata_tc
- scrut = unwrapFamInstScrut pdata_tc arg_tys expr
+ ptys <- mapM mkPDataType tys
+ vars <- newLocalVars (fsLit "xs") ptys
+ (res', args) <- fold from_con res_ty res (map Var vars) cons
+ let scrut = unwrapFamInstScrut psum_tc tys expr
+ body = mkWildCase scrut (exprType scrut) res_ty
+ [(DataAlt psum_con, sel : vars, res')]
+ return (body, Var sel : args)
+ where
+ [psum_con] = tyConDataCons psum_tc
- mk body = mkWildCase scrut (exprType scrut) res_ty
- [(DataAlt pdata_con, sel : vars, foldr ($) body mks)]
- return (Var sel : concat prods, mk)
+ from_con res_ty res expr (ConRepr _ r) = from_prod res_ty res expr r
- from_prod res_ty expr con
- | [] <- tys = return ([], id)
- | [_] <- tys = return ([expr], id)
- | otherwise
- = do
- prod_tc <- builtin (prodTyCon (length tys))
- (pdata_tc, _) <- pdataReprTyCon (mkTyConApp prod_tc tys)
- pdata_tys <- mapM mkPDataType tys
- vars <- newLocalVars (fsLit "ys") pdata_tys
- let [pdata_con] = tyConDataCons pdata_tc
- scrut = unwrapFamInstScrut pdata_tc tys expr
-
- mk body = mkWildCase scrut (exprType scrut) res_ty
- [(DataAlt pdata_con, vars, body)]
-
- return (map Var vars, mk)
+ from_prod _ res _ EmptyProd = return (res, [])
+ from_prod res_ty res expr (UnaryProd r)
+ = from_comp res_ty res expr r
+ from_prod res_ty res expr (Prod { repr_ptup_tc = ptup_tc
+ , repr_comp_tys = tys
+ , repr_comps = comps })
+ = do
+ ptys <- mapM mkPDataType tys
+ vars <- newLocalVars (fsLit "ys") ptys
+ (res', args) <- fold from_comp res_ty res (map Var vars) comps
+ let scrut = unwrapFamInstScrut ptup_tc tys expr
+ body = mkWildCase scrut (exprType scrut) res_ty
+ [(DataAlt ptup_con, vars, res')]
+ return (body, args)
where
- tys = dataConRepArgTys con
+ [ptup_con] = tyConDataCons ptup_tc
+
+ from_comp _ res expr (Keep _ _) = return (res, [expr])
+ from_comp _ res expr (Wrap ty)
+ = do
+ wrap_tc <- builtin wrapTyCon
+ (pwrap_tc, _) <- pdataReprTyCon (mkTyConApp wrap_tc [ty])
+ return (res, [unwrapNewTypeBody pwrap_tc [ty]
+ $ unwrapFamInstScrut pwrap_tc [ty] expr])
-buildPRDict :: TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildPRDict vect_tc prepr_tc _
+ fold f res_ty res exprs rs = foldrM f' (res, []) (zip exprs rs)
+ where
+ f' (expr, r) (res, args) = do
+ (res', args') <- f res_ty res expr r
+ return (res', args' ++ args)
+
+buildPRDict :: TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr
+buildPRDict vect_tc prepr_tc _ r
= do
- dict <- sum_dict (tyConDataCons vect_tc)
+ dict <- sum_dict r
pr_co <- mkBuiltinCo prTyCon
let co = mkAppCoercion pr_co
. mkSymCoercion
ty_args = mkTyVarTys (tyConTyVars vect_tc)
Just arg_co = tyConFamilyCoercion_maybe prepr_tc
- sum_dict [] = prDFunOfTyCon =<< builtin voidTyCon
- sum_dict [con] = prod_dict con
- sum_dict cons = do
- dicts <- mapM prod_dict cons
- (sum_tc, _, _, sum_ty_args) <- reprSumTyCons vect_tc
- dfun <- prDFunOfTyCon sum_tc
- return $ dfun `mkTyApps` sum_ty_args `mkApps` dicts
-
- prod_dict con
- | [] <- tys = prDFunOfTyCon =<< builtin voidTyCon
- | [ty] <- tys = mkPR ty
- | otherwise = do
- dicts <- mapM mkPR tys
- prod_tc <- builtin (prodTyCon (length tys))
- dfun <- prDFunOfTyCon prod_tc
- return $ dfun `mkTyApps` tys `mkApps` dicts
- where
- tys = dataConRepArgTys con
+ sum_dict EmptySum = prDFunOfTyCon =<< builtin voidTyCon
+ sum_dict (UnarySum r) = con_dict r
+ sum_dict (Sum { repr_sum_tc = sum_tc
+ , repr_con_tys = tys
+ , repr_cons = cons
+ })
+ = do
+ dicts <- mapM con_dict cons
+ dfun <- prDFunOfTyCon sum_tc
+ return $ dfun `mkTyApps` tys `mkApps` dicts
-buildPDataTyCon :: TyCon -> TyCon -> VM TyCon
-buildPDataTyCon orig_tc vect_tc = fixV $ \repr_tc ->
+ con_dict (ConRepr _ r) = prod_dict r
+
+ prod_dict EmptyProd = prDFunOfTyCon =<< builtin voidTyCon
+ prod_dict (UnaryProd r) = comp_dict r
+ prod_dict (Prod { repr_tup_tc = tup_tc
+ , repr_comp_tys = tys
+ , repr_comps = comps })
+ = do
+ dicts <- mapM comp_dict comps
+ dfun <- prDFunOfTyCon tup_tc
+ return $ dfun `mkTyApps` tys `mkApps` dicts
+
+ comp_dict (Keep _ pr) = return pr
+ comp_dict (Wrap ty) = wrapPR ty
+
+
+buildPDataTyCon :: TyCon -> TyCon -> SumRepr -> VM TyCon
+buildPDataTyCon orig_tc vect_tc repr = fixV $ \repr_tc ->
do
name' <- cloneName mkPDataTyConOcc orig_name
- rhs <- buildPDataTyConRhs orig_name vect_tc repr_tc
+ rhs <- buildPDataTyConRhs orig_name vect_tc repr_tc repr
pdata <- builtin pdataTyCon
liftDs $ buildAlgTyCon name'
rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
-buildPDataTyConRhs :: Name -> TyCon -> TyCon -> VM AlgTyConRhs
-buildPDataTyConRhs orig_name vect_tc repr_tc
+buildPDataTyConRhs :: Name -> TyCon -> TyCon -> SumRepr -> VM AlgTyConRhs
+buildPDataTyConRhs orig_name vect_tc repr_tc repr
= do
- data_con <- buildPDataDataCon orig_name vect_tc repr_tc
+ data_con <- buildPDataDataCon orig_name vect_tc repr_tc repr
return $ DataTyCon { data_cons = [data_con], is_enum = False }
-buildPDataDataCon :: Name -> TyCon -> TyCon -> VM DataCon
-buildPDataDataCon orig_name vect_tc repr_tc
+buildPDataDataCon :: Name -> TyCon -> TyCon -> SumRepr -> VM DataCon
+buildPDataDataCon orig_name vect_tc repr_tc repr
= do
dc_name <- cloneName mkPDataDataConOcc orig_name
- comp_tys <- components
+ comp_tys <- sum_tys repr
liftDs $ buildDataCon dc_name
False -- not infix
- (map (const NotMarkedStrict) comp_tys)
+ (map (const HsNoBang) comp_tys)
[] -- no field labels
tvs
[] -- no existentials
repr_tc
where
tvs = tyConTyVars vect_tc
- cons = tyConDataCons vect_tc
- arity = length cons
- components
- | arity > 1 = liftM2 (:) (builtin (selTy arity)) data_components
- | otherwise = data_components
+ sum_tys EmptySum = return []
+ sum_tys (UnarySum r) = con_tys r
+ sum_tys (Sum { repr_sel_ty = sel_ty
+ , repr_cons = cons })
+ = liftM (sel_ty :) (concatMapM con_tys cons)
+
+ con_tys (ConRepr _ r) = prod_tys r
+
+ prod_tys EmptyProd = return []
+ prod_tys (UnaryProd r) = liftM singleton (comp_ty r)
+ prod_tys (Prod { repr_comps = comps }) = mapM comp_ty comps
- data_components = mapM mkPDataType
- . concat
- $ map dataConRepArgTys cons
+ comp_ty r = mkPDataType (compOrigType r)
-mkPADFun :: TyCon -> VM Var
-mkPADFun vect_tc
- = newExportedVar (mkPADFunOcc $ getOccName vect_tc) =<< paDFunType vect_tc
-buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> Var
- -> VM [(Var, CoreExpr)]
-buildTyConBindings orig_tc vect_tc prepr_tc pdata_tc dfun
+buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> SumRepr
+ -> VM Var
+buildTyConBindings orig_tc vect_tc prepr_tc pdata_tc repr
= do
vectDataConWorkers orig_tc vect_tc pdata_tc
- dict <- buildPADict vect_tc prepr_tc pdata_tc dfun
- binds <- takeHoisted
- return $ (dfun, dict) : binds
+ buildPADict vect_tc prepr_tc pdata_tc repr
vectDataConWorkers :: TyCon -> TyCon -> TyCon -> VM ()
vectDataConWorkers orig_tc vect_tc arr_tc
def_worker data_con arg_tys mk_body
= do
+ arity <- polyArity tyvars
body <- closedV
. inBind orig_worker
- . polyAbstract tyvars $ \abstract ->
- liftM (abstract . vectorised)
+ . polyAbstract tyvars $ \args ->
+ liftM (mkLams (tyvars ++ args) . vectorised)
$ buildClosures tyvars [] arg_tys res_ty mk_body
- vect_worker <- cloneId mkVectOcc orig_worker (exprType body)
+ raw_worker <- cloneId mkVectOcc orig_worker (exprType body)
+ let vect_worker = raw_worker `setIdUnfolding`
+ mkInlineRule body (Just arity)
defGlobalVar orig_worker vect_worker
return (vect_worker, body)
where
orig_worker = dataConWorkId data_con
-buildPADict :: TyCon -> TyCon -> TyCon -> Var -> VM CoreExpr
-buildPADict vect_tc prepr_tc arr_tc _
- = polyAbstract tvs $ \abstract ->
+buildPADict :: TyCon -> TyCon -> TyCon -> SumRepr -> VM Var
+buildPADict vect_tc prepr_tc arr_tc repr
+ = polyAbstract tvs $ \args ->
do
- meth_binds <- mapM mk_method paMethods
- let meth_exprs = map (Var . fst) meth_binds
+ method_ids <- mapM (method args) paMethods
- pa_dc <- builtin paDataCon
- let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
- body = Let (Rec meth_binds) dict
- return . mkInlineMe $ abstract body
+ pa_tc <- builtin paTyCon
+ pa_dc <- builtin paDataCon
+ let dict = mkLams (tvs ++ args)
+ $ mkConApp pa_dc
+ $ Type inst_ty : map (method_call args) method_ids
+
+ dfun_ty = mkForAllTys tvs
+ $ mkFunTys (map varType args) (mkTyConApp pa_tc [inst_ty])
+
+ raw_dfun <- newExportedVar dfun_name dfun_ty
+ let dfun = raw_dfun `setIdUnfolding` mkDFunUnfolding dfun_ty (map Var method_ids)
+ `setInlinePragma` dfunInlinePragma
+
+ hoistBinding dfun dict
+ return dfun
where
- tvs = tyConTyVars arr_tc
+ tvs = tyConTyVars vect_tc
arg_tys = mkTyVarTys tvs
+ inst_ty = mkTyConApp vect_tc arg_tys
+
+ dfun_name = mkPADFunOcc (getOccName vect_tc)
- mk_method (name, build)
+ method args (name, build)
= localV
$ do
- body <- build vect_tc prepr_tc arr_tc
- var <- newLocalVar name (exprType body)
- return (var, mkInlineMe body)
+ expr <- build vect_tc prepr_tc arr_tc repr
+ let body = mkLams (tvs ++ args) expr
+ raw_var <- newExportedVar (method_name name) (exprType body)
+ let var = raw_var
+ `setIdUnfolding` mkInlineRule body (Just (length args))
+ `setInlinePragma` alwaysInlinePragma
+ hoistBinding var body
+ return var
+
+ method_call args id = mkApps (Var id) (map Type arg_tys ++ map Var args)
+
+ method_name name = mkVarOcc $ occNameString dfun_name ++ ('$' : name)
+
+
+paMethods :: [(String, TyCon -> TyCon -> TyCon -> SumRepr -> VM CoreExpr)]
+paMethods = [("dictPRepr", buildPRDict),
+ ("toPRepr", buildToPRepr),
+ ("fromPRepr", buildFromPRepr),
+ ("toArrPRepr", buildToArrPRepr),
+ ("fromArrPRepr", buildFromArrPRepr)]
-paMethods :: [(FastString, TyCon -> TyCon -> TyCon -> VM CoreExpr)]
-paMethods = [(fsLit "toPRepr", buildToPRepr),
- (fsLit "fromPRepr", buildFromPRepr),
- (fsLit "toArrPRepr", buildToArrPRepr),
- (fsLit "fromArrPRepr", buildFromArrPRepr),
- (fsLit "dictPRepr", buildPRDict)]
-- | 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:
+-- converted (first list) or not (second list). The first argument contains
+-- information about the conversion status of external tycons:
--
-- * tycons which have converted versions are mapped to True
-- * tycons which are not changed by vectorisation are mapped to False
-- ----------------------------------------------------------------------------
-- 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