2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
6 mkPlusType, mkPlusTypes, mkCrossType, mkCrossTypes, mkEmbedType,
7 mkPlusAlts, mkCrosses, mkEmbed,
8 mkPADictType, mkPArrayType,
9 parrayReprTyCon, parrayReprDataCon, mkVScrut,
10 paDictArgType, paDictOfType, paDFunType,
11 paMethod, lengthPA, replicatePA, emptyPA, liftPA,
12 polyAbstract, polyApply, polyVApply,
13 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
14 buildClosure, buildClosures,
18 #include "HsVersions.h"
29 import DataCon ( DataCon, dataConWrapId, dataConTag )
31 import Id ( mkWildId )
32 import MkId ( unwrapFamInstScrut )
35 import BasicTypes ( Boxity(..) )
40 import Control.Monad ( liftM, zipWithM_ )
42 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
43 collectAnnTypeArgs expr = go expr []
45 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
48 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
49 collectAnnTypeBinders expr = go [] expr
51 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
52 go bs e = (reverse bs, e)
54 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
55 collectAnnValBinders expr = go [] expr
57 go bs (_, AnnLam b e) | isId b = go (b:bs) e
58 go bs e = (reverse bs, e)
60 isAnnTypeArg :: AnnExpr b ann -> Bool
61 isAnnTypeArg (_, AnnType t) = True
62 isAnnTypeArg _ = False
64 mkDataConTag :: DataCon -> CoreExpr
65 mkDataConTag dc = mkConApp intDataCon [mkIntLitInt $ dataConTag dc]
67 isClosureTyCon :: TyCon -> Bool
68 isClosureTyCon tc = tyConName tc == closureTyConName
70 splitClosureTy :: Type -> (Type, Type)
72 | Just (tc, [arg_ty, res_ty]) <- splitTyConApp_maybe ty
76 | otherwise = pprPanic "splitClosureTy" (ppr ty)
78 isPArrayTyCon :: TyCon -> Bool
79 isPArrayTyCon tc = tyConName tc == parrayTyConName
81 splitPArrayTy :: Type -> Type
83 | Just (tc, [arg_ty]) <- splitTyConApp_maybe ty
87 | otherwise = pprPanic "splitPArrayTy" (ppr ty)
89 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
90 mkBuiltinTyConApp get_tc tys
93 return $ mkTyConApp tc tys
95 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
96 mkBuiltinTyConApps get_tc tys ty
99 return $ foldr (mk tc) ty tys
101 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
103 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
104 mkBuiltinTyConApps1 get_tc dft [] = return dft
105 mkBuiltinTyConApps1 get_tc dft tys
109 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
110 _ -> return $ foldr1 (mk tc) tys
112 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
114 mkBuiltinDataConApp :: (Builtins -> DataCon) -> [CoreExpr] -> VM CoreExpr
115 mkBuiltinDataConApp get_dc args
118 return $ mkConApp dc args
120 mkPlusType :: Type -> Type -> VM Type
121 mkPlusType ty1 ty2 = mkBuiltinTyConApp plusTyCon [ty1, ty2]
123 mkPlusTypes :: Type -> [Type] -> VM Type
124 mkPlusTypes = mkBuiltinTyConApps1 plusTyCon
126 mkPlusAlts :: [CoreExpr] -> VM [CoreExpr]
127 mkPlusAlts [] = return []
130 plus_tc <- builtin plusTyCon
131 left_dc <- builtin leftDataCon
132 right_dc <- builtin rightDataCon
134 let go [expr] = ([expr], exprType expr)
136 | (alts, right_ty) <- go exprs
137 = (mkConApp left_dc [Type left_ty, Type right_ty, expr]
138 : [mkConApp right_dc [Type left_ty, Type right_ty, alt]
140 mkTyConApp plus_tc [left_ty, right_ty])
142 left_ty = exprType expr
144 return . fst $ go exprs
146 mkCrossType :: Type -> Type -> VM Type
147 mkCrossType ty1 ty2 = mkBuiltinTyConApp crossTyCon [ty1, ty2]
149 mkCrossTypes :: Type -> [Type] -> VM Type
150 mkCrossTypes = mkBuiltinTyConApps1 crossTyCon
152 mkCrosses :: [CoreExpr] -> VM CoreExpr
153 mkCrosses [] = return (Var unitDataConId)
156 cross_tc <- builtin crossTyCon
157 cross_dc <- builtin crossDataCon
159 let mk (left, left_ty) (right, right_ty)
160 = (mkConApp cross_dc [Type left_ty, Type right_ty, left, right],
161 mkTyConApp cross_tc [left_ty, right_ty])
164 $ foldr1 mk [(expr, exprType expr) | expr <- exprs]
166 mkEmbedType :: Type -> VM Type
167 mkEmbedType ty = mkBuiltinTyConApp embedTyCon [ty]
169 mkEmbed :: CoreExpr -> VM CoreExpr
170 mkEmbed expr = mkBuiltinDataConApp embedDataCon
171 [Type $ exprType expr, expr]
173 mkClosureType :: Type -> Type -> VM Type
174 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
176 mkClosureTypes :: [Type] -> Type -> VM Type
177 mkClosureTypes = mkBuiltinTyConApps closureTyCon
179 mkPADictType :: Type -> VM Type
180 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
182 mkPArrayType :: Type -> VM Type
183 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
185 parrayReprTyCon :: Type -> VM (TyCon, [Type])
186 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
188 parrayReprDataCon :: Type -> VM (DataCon, [Type])
191 (tc, arg_tys) <- parrayReprTyCon ty
192 let [dc] = tyConDataCons tc
195 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
198 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
199 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
201 paDictArgType :: TyVar -> VM (Maybe Type)
202 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
204 go ty k | Just k' <- kindView k = go ty k'
207 tv <- newTyVar FSLIT("a") k1
208 mty1 <- go (TyVarTy tv) k1
211 mty2 <- go (AppTy ty (TyVarTy tv)) k2
212 return $ fmap (ForAllTy tv . FunTy ty1) mty2
217 = liftM Just (mkPADictType ty)
219 go ty k = return Nothing
221 paDictOfType :: Type -> VM CoreExpr
222 paDictOfType ty = paDictOfTyApp ty_fn ty_args
224 (ty_fn, ty_args) = splitAppTys ty
226 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
227 paDictOfTyApp ty_fn ty_args
228 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
229 paDictOfTyApp (TyVarTy tv) ty_args
231 dfun <- maybeV (lookupTyVarPA tv)
232 paDFunApply dfun ty_args
233 paDictOfTyApp (TyConApp tc _) ty_args
235 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
236 paDFunApply (Var dfun) ty_args
237 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
239 paDFunType :: TyCon -> VM Type
242 margs <- mapM paDictArgType tvs
243 res <- mkPADictType (mkTyConApp tc arg_tys)
244 return . mkForAllTys tvs
245 $ mkFunTys [arg | Just arg <- margs] res
248 arg_tys = mkTyVarTys tvs
250 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
253 dicts <- mapM paDictOfType tys
254 return $ mkApps (mkTyApps dfun tys) dicts
256 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
260 dict <- paDictOfType ty
261 return $ mkApps (Var fn) [Type ty, dict]
263 lengthPA :: CoreExpr -> VM CoreExpr
264 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
266 ty = splitPArrayTy (exprType x)
268 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
269 replicatePA len x = liftM (`mkApps` [len,x])
270 (paMethod replicatePAVar (exprType x))
272 emptyPA :: Type -> VM CoreExpr
273 emptyPA = paMethod emptyPAVar
275 liftPA :: CoreExpr -> VM CoreExpr
278 lc <- builtin liftingContext
279 replicatePA (Var lc) x
281 newLocalVVar :: FastString -> Type -> VM VVar
284 lty <- mkPArrayType vty
285 vv <- newLocalVar fs vty
286 lv <- newLocalVar fs lty
289 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
293 mdicts <- mapM mk_dict_var tvs
294 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
298 r <- paDictArgType tv
300 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
301 Nothing -> return Nothing
303 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
305 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
308 dicts <- mapM paDictOfType tys
309 return $ expr `mkTyApps` tys `mkApps` dicts
311 polyVApply :: VExpr -> [Type] -> VM VExpr
314 dicts <- mapM paDictOfType tys
315 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
317 hoistBinding :: Var -> CoreExpr -> VM ()
318 hoistBinding v e = updGEnv $ \env ->
319 env { global_bindings = (v,e) : global_bindings env }
321 hoistExpr :: FastString -> CoreExpr -> VM Var
324 var <- newLocalVar fs (exprType expr)
325 hoistBinding var expr
328 hoistVExpr :: VExpr -> VM VVar
332 vv <- hoistExpr ('v' `consFS` fs) ve
333 lv <- hoistExpr ('l' `consFS` fs) le
336 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
339 expr <- closedV . polyAbstract tvs $ \abstract ->
340 liftM (mapVect abstract) p
341 fn <- hoistVExpr expr
342 polyVApply (vVar fn) (mkTyVarTys tvs)
344 takeHoisted :: VM [(Var, CoreExpr)]
348 setGEnv $ env { global_bindings = [] }
349 return $ global_bindings env
351 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
352 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
354 dict <- paDictOfType env_ty
355 mkv <- builtin mkClosureVar
356 mkl <- builtin mkClosurePVar
357 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
358 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
360 mkClosureApp :: VExpr -> VExpr -> VM VExpr
361 mkClosureApp (vclo, lclo) (varg, larg)
363 vapply <- builtin applyClosureVar
364 lapply <- builtin applyClosurePVar
365 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
366 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
368 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
370 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
371 buildClosures tvs vars [] res_ty mk_body
373 buildClosures tvs vars [arg_ty] res_ty mk_body
374 = buildClosure tvs vars arg_ty res_ty mk_body
375 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
377 res_ty' <- mkClosureTypes arg_tys res_ty
378 arg <- newLocalVVar FSLIT("x") arg_ty
379 buildClosure tvs vars arg_ty res_ty'
382 lc <- builtin liftingContext
383 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
384 return $ vLams lc (vars ++ [arg]) clo
386 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
388 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
389 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
391 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
392 buildClosure tvs vars arg_ty res_ty mk_body
394 (env_ty, env, bind) <- buildEnv vars
395 env_bndr <- newLocalVVar FSLIT("env") env_ty
396 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
398 fn <- hoistPolyVExpr tvs
400 lc <- builtin liftingContext
402 body' <- bind (vVar env_bndr)
403 (vVarApps lc body (vars ++ [arg_bndr]))
404 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
406 mkClosure arg_ty res_ty env_ty fn env
408 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
411 lc <- builtin liftingContext
412 let (ty, venv, vbind) = mkVectEnv tys vs
413 (lenv, lbind) <- mkLiftEnv lc tys ls
414 return (ty, (venv, lenv),
415 \(venv,lenv) (vbody,lbody) ->
417 let vbody' = vbind venv vbody
418 lbody' <- lbind lenv lbody
419 return (vbody', lbody'))
424 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
425 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
426 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
427 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
428 \env body -> Case env (mkWildId ty) (exprType body)
429 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
433 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
434 mkLiftEnv lc [ty] [v]
435 = return (Var v, \env body ->
437 len <- lengthPA (Var v)
438 return . Let (NonRec v env)
439 $ Case len lc (exprType body) [(DEFAULT, [], body)])
441 -- NOTE: this transparently deals with empty environments
444 (env_tc, env_tyargs) <- parrayReprTyCon vty
445 let [env_con] = tyConDataCons env_tc
447 env = Var (dataConWrapId env_con)
448 `mkTyApps` env_tyargs
449 `mkVarApps` (lc : vs)
451 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
453 return $ Case scrut (mkWildId (exprType scrut))
455 [(DataAlt env_con, lc : bndrs, body)]
458 vty = mkCoreTupTy tys
460 bndrs | null vs = [mkWildId unitTy]