2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
4 mkPADictType, mkPArrayType,
5 paDictArgType, paDictOfType,
6 paMethod, lengthPA, replicatePA, emptyPA,
7 polyAbstract, polyApply,
12 #include "HsVersions.h"
22 import DataCon ( dataConWrapId )
24 import Id ( mkWildId )
25 import MkId ( unwrapFamInstScrut )
28 import BasicTypes ( Boxity(..) )
33 import Control.Monad ( liftM, zipWithM_ )
35 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
36 collectAnnTypeArgs expr = go expr []
38 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
41 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
42 collectAnnTypeBinders expr = go [] expr
44 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
45 go bs e = (reverse bs, e)
47 isAnnTypeArg :: AnnExpr b ann -> Bool
48 isAnnTypeArg (_, AnnType t) = True
49 isAnnTypeArg _ = False
51 isClosureTyCon :: TyCon -> Bool
52 isClosureTyCon tc = tyConName tc == closureTyConName
54 splitClosureTy :: Type -> (Type, Type)
56 | Just (tc, [arg_ty, res_ty]) <- splitTyConApp_maybe ty
60 | otherwise = pprPanic "splitClosureTy" (ppr ty)
62 isPArrayTyCon :: TyCon -> Bool
63 isPArrayTyCon tc = tyConName tc == parrayTyConName
65 splitPArrayTy :: Type -> Type
67 | Just (tc, [arg_ty]) <- splitTyConApp_maybe ty
71 | otherwise = pprPanic "splitPArrayTy" (ppr ty)
73 mkPADictType :: Type -> VM Type
76 tc <- builtin paDictTyCon
77 return $ TyConApp tc [ty]
79 mkPArrayType :: Type -> VM Type
82 tc <- builtin parrayTyCon
83 return $ TyConApp tc [ty]
85 paDictArgType :: TyVar -> VM (Maybe Type)
86 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
88 go ty k | Just k' <- kindView k = go ty k'
91 tv <- newTyVar FSLIT("a") k1
92 mty1 <- go (TyVarTy tv) k1
95 mty2 <- go (AppTy ty (TyVarTy tv)) k2
96 return $ fmap (ForAllTy tv . FunTy ty1) mty2
101 = liftM Just (mkPADictType ty)
103 go ty k = return Nothing
105 paDictOfType :: Type -> VM CoreExpr
106 paDictOfType ty = paDictOfTyApp ty_fn ty_args
108 (ty_fn, ty_args) = splitAppTys ty
110 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
111 paDictOfTyApp ty_fn ty_args
112 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
113 paDictOfTyApp (TyVarTy tv) ty_args
115 dfun <- maybeV (lookupTyVarPA tv)
116 paDFunApply dfun ty_args
117 paDictOfTyApp (TyConApp tc _) ty_args
119 pa_class <- builtin paClass
120 (dfun, ty_args') <- lookupInst pa_class [TyConApp tc ty_args]
121 paDFunApply (Var dfun) ty_args'
122 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
124 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
127 dicts <- mapM paDictOfType tys
128 return $ mkApps (mkTyApps dfun tys) dicts
130 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
134 dict <- paDictOfType ty
135 return $ mkApps (Var fn) [Type ty, dict]
137 lengthPA :: CoreExpr -> VM CoreExpr
138 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
140 ty = splitPArrayTy (exprType x)
142 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
143 replicatePA len x = liftM (`mkApps` [len,x])
144 (paMethod replicatePAVar (exprType x))
146 emptyPA :: Type -> VM CoreExpr
147 emptyPA = paMethod emptyPAVar
151 type VExpr = Vect CoreExpr
153 vectorised :: Vect a -> a
156 lifted :: Vect a -> a
159 mapVect :: (a -> b) -> Vect a -> Vect b
160 mapVect f (x,y) = (f x, f y)
162 newLocalVVar :: FastString -> Type -> VM VVar
165 lty <- mkPArrayType vty
166 vv <- newLocalVar fs vty
167 lv <- newLocalVar fs lty
170 vVar :: VVar -> VExpr
173 mkVLams :: [VVar] -> VExpr -> VExpr
174 mkVLams vvs (ve,le) = (mkLams vs ve, mkLams ls le)
178 mkVVarApps :: Var -> VExpr -> [VVar] -> VExpr
179 mkVVarApps lc (ve, le) vvs = (ve `mkVarApps` vs, le `mkVarApps` (lc : ls))
183 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
187 mdicts <- mapM mk_dict_var tvs
188 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
192 r <- paDictArgType tv
194 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
195 Nothing -> return Nothing
197 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
199 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
202 dicts <- mapM paDictOfType tys
203 return $ expr `mkTyApps` tys `mkApps` dicts
205 lookupPArrayFamInst :: Type -> VM (TyCon, [Type])
206 lookupPArrayFamInst ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
208 hoistExpr :: FastString -> CoreExpr -> VM Var
211 var <- newLocalVar fs (exprType expr)
213 env { global_bindings = (var, expr) : global_bindings env }
216 hoistPolyExpr :: FastString -> [TyVar] -> CoreExpr -> VM CoreExpr
217 hoistPolyExpr fs tvs expr
219 poly_expr <- closedV . polyAbstract tvs $ \abstract -> return (abstract expr)
220 fn <- hoistExpr fs poly_expr
221 polyApply (Var fn) (mkTyVarTys tvs)
223 hoistPolyVExpr :: FastString -> [TyVar] -> VExpr -> VM VExpr
224 hoistPolyVExpr fs tvs (ve, le)
226 ve' <- hoistPolyExpr ('v' `consFS` fs) tvs ve
227 le' <- hoistPolyExpr ('l' `consFS` fs) tvs le
230 takeHoisted :: VM [(Var, CoreExpr)]
234 setGEnv $ env { global_bindings = [] }
235 return $ global_bindings env
238 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
239 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
241 dict <- paDictOfType env_ty
242 mkv <- builtin mkClosureVar
243 mkl <- builtin mkClosurePVar
244 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
245 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
247 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
249 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
250 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
252 buildClosure :: [TyVar] -> Var -> [VVar] -> VVar -> VExpr -> VM VExpr
253 buildClosure tvs lv vars arg body
255 (env_ty, env, bind) <- buildEnv lv vars
256 env_bndr <- newLocalVVar FSLIT("env") env_ty
258 fn <- hoistPolyVExpr FSLIT("fn") tvs
259 . mkVLams [env_bndr, arg]
260 . bind (vVar env_bndr)
261 $ mkVVarApps lv body (vars ++ [arg])
263 mkClosure arg_ty res_ty env_ty fn env
266 arg_ty = idType (vectorised arg)
267 res_ty = exprType (vectorised body)
270 buildEnv :: Var -> [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VExpr)
273 let (ty, venv, vbind) = mkVectEnv tys vs
274 (lenv, lbind) <- mkLiftEnv lv tys ls
275 return (ty, (venv, lenv),
276 \(venv,lenv) (vbody,lbody) -> (vbind venv vbody, lbind lenv lbody))
281 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
282 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
283 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
284 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
285 \env body -> Case env (mkWildId ty) (exprType body)
286 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
290 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
291 mkLiftEnv lv [ty] [v]
293 len <- lengthPA (Var v)
294 return (Var v, \env body -> Let (NonRec v env)
295 $ Case len lv (exprType body) [(DEFAULT, [], body)])
297 -- NOTE: this transparently deals with empty environments
300 (env_tc, env_tyargs) <- lookupPArrayFamInst vty
301 let [env_con] = tyConDataCons env_tc
303 env = Var (dataConWrapId env_con)
304 `mkTyApps` env_tyargs
305 `mkVarApps` (lv : vs)
307 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
309 Case scrut (mkWildId (exprType scrut)) (exprType body)
310 [(DataAlt env_con, lv : vs, body)]
313 vty = mkCoreTupTy tys