mkPADictType, mkPArrayType,
paDictArgType, paDictOfType,
paMethod, lengthPA, replicatePA, emptyPA,
- abstractOverTyVars, applyToTypes,
+ polyAbstract, polyApply,
lookupPArrayFamInst,
hoistExpr, takeHoisted
) where
import VectMonad
+import DsUtils
import CoreSyn
import CoreUtils
import Type
import TypeRep
import TyCon
+import DataCon ( dataConWrapId )
import Var
+import Id ( mkWildId )
+import MkId ( unwrapFamInstScrut )
import PrelNames
+import TysWiredIn
+import BasicTypes ( Boxity(..) )
import Outputable
import FastString
isAnnTypeArg _ = False
isClosureTyCon :: TyCon -> Bool
-isClosureTyCon tc = tyConUnique tc == closureTyConKey
+isClosureTyCon tc = tyConName tc == closureTyConName
splitClosureTy :: Type -> (Type, Type)
splitClosureTy ty
| otherwise = pprPanic "splitClosureTy" (ppr ty)
+isPArrayTyCon :: TyCon -> Bool
+isPArrayTyCon tc = tyConName tc == parrayTyConName
+
+splitPArrayTy :: Type -> Type
+splitPArrayTy ty
+ | Just (tc, [arg_ty]) <- splitTyConApp_maybe ty
+ , isPArrayTyCon tc
+ = arg_ty
+
+ | otherwise = pprPanic "splitPArrayTy" (ppr ty)
+
mkPADictType :: Type -> VM Type
mkPADictType ty
= do
return $ mkApps (Var fn) [Type ty, dict]
lengthPA :: CoreExpr -> VM CoreExpr
-lengthPA x = liftM (`App` x) (paMethod lengthPAVar (exprType x))
+lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
+ where
+ ty = splitPArrayTy (exprType x)
replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
replicatePA len x = liftM (`mkApps` [len,x])
emptyPA :: Type -> VM CoreExpr
emptyPA = paMethod emptyPAVar
-abstractOverTyVars :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
-abstractOverTyVars tvs p
+type Vect a = (a,a)
+type VVar = Vect Var
+type VExpr = Vect CoreExpr
+
+vectorised :: Vect a -> a
+vectorised = fst
+
+lifted :: Vect a -> a
+lifted = snd
+
+mapVect :: (a -> b) -> Vect a -> Vect b
+mapVect f (x,y) = (f x, f y)
+
+newLocalVVar :: FastString -> Type -> VM VVar
+newLocalVVar fs vty
= do
+ lty <- mkPArrayType vty
+ vv <- newLocalVar fs vty
+ lv <- newLocalVar fs lty
+ return (vv,lv)
+
+vVar :: VVar -> VExpr
+vVar = mapVect Var
+
+mkVLams :: [VVar] -> VExpr -> VExpr
+mkVLams vvs (ve,le) = (mkLams vs ve, mkLams ls le)
+ where
+ (vs,ls) = unzip vvs
+
+mkVVarApps :: Var -> VExpr -> [VVar] -> VExpr
+mkVVarApps lc (ve, le) vvs = (ve `mkVarApps` vs, le `mkVarApps` (lc : ls))
+ where
+ (vs,ls) = unzip vvs
+
+polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
+polyAbstract tvs p
+ = localV
+ $ do
mdicts <- mapM mk_dict_var tvs
zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
p (mk_lams mdicts)
mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
-applyToTypes :: CoreExpr -> [Type] -> VM CoreExpr
-applyToTypes expr tys
+polyApply :: CoreExpr -> [Type] -> VM CoreExpr
+polyApply expr tys
= do
dicts <- mapM paDictOfType tys
return $ expr `mkTyApps` tys `mkApps` dicts
env { global_bindings = (var, expr) : global_bindings env }
return var
+hoistPolyExpr :: FastString -> [TyVar] -> CoreExpr -> VM CoreExpr
+hoistPolyExpr fs tvs expr
+ = do
+ poly_expr <- closedV . polyAbstract tvs $ \abstract -> return (abstract expr)
+ fn <- hoistExpr fs poly_expr
+ polyApply (Var fn) (mkTyVarTys tvs)
+
+hoistPolyVExpr :: FastString -> [TyVar] -> VExpr -> VM VExpr
+hoistPolyVExpr fs tvs (ve, le)
+ = do
+ ve' <- hoistPolyExpr ('v' `consFS` fs) tvs ve
+ le' <- hoistPolyExpr ('l' `consFS` fs) tvs le
+ return (ve',le')
+
takeHoisted :: VM [(Var, CoreExpr)]
takeHoisted
= do
setGEnv $ env { global_bindings = [] }
return $ global_bindings env
+
+mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
+mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
+ = do
+ dict <- paDictOfType env_ty
+ mkv <- builtin mkClosureVar
+ mkl <- builtin mkClosurePVar
+ return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
+ Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
+
+-- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
+-- where
+-- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
+-- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
+
+buildClosure :: [TyVar] -> Var -> [VVar] -> VVar -> VExpr -> VM VExpr
+buildClosure tvs lv vars arg body
+ = do
+ (env_ty, env, bind) <- buildEnv lv vars
+ env_bndr <- newLocalVVar FSLIT("env") env_ty
+
+ fn <- hoistPolyVExpr FSLIT("fn") tvs
+ . mkVLams [env_bndr, arg]
+ . bind (vVar env_bndr)
+ $ mkVVarApps lv body (vars ++ [arg])
+
+ mkClosure arg_ty res_ty env_ty fn env
+
+ where
+ arg_ty = idType (vectorised arg)
+ res_ty = exprType (vectorised body)
+
+
+buildEnv :: Var -> [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VExpr)
+buildEnv lv vvs
+ = do
+ let (ty, venv, vbind) = mkVectEnv tys vs
+ (lenv, lbind) <- mkLiftEnv lv tys ls
+ return (ty, (venv, lenv),
+ \(venv,lenv) (vbody,lbody) -> (vbind venv vbody, lbind lenv lbody))
+ where
+ (vs,ls) = unzip vvs
+ tys = map idType vs
+
+mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
+mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
+mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
+mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
+ \env body -> Case env (mkWildId ty) (exprType body)
+ [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
+ where
+ ty = mkCoreTupTy tys
+
+mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
+mkLiftEnv lv [ty] [v]
+ = do
+ len <- lengthPA (Var v)
+ return (Var v, \env body -> Let (NonRec v env)
+ $ Case len lv (exprType body) [(DEFAULT, [], body)])
+
+-- NOTE: this transparently deals with empty environments
+mkLiftEnv lv tys vs
+ = do
+ (env_tc, env_tyargs) <- lookupPArrayFamInst vty
+ let [env_con] = tyConDataCons env_tc
+
+ env = Var (dataConWrapId env_con)
+ `mkTyApps` env_tyargs
+ `mkVarApps` (lv : vs)
+
+ bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
+ in
+ Case scrut (mkWildId (exprType scrut)) (exprType body)
+ [(DataAlt env_con, lv : vs, body)]
+ return (env, bind)
+ where
+ vty = mkCoreTupTy tys
+