2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
7 TyConRepr(..), mkTyConRepr,
8 mkToPRepr, mkToArrPRepr, mkFromPRepr, mkFromArrPRepr,
9 mkPADictType, mkPArrayType, mkPReprType,
11 parrayCoerce, parrayReprTyCon, parrayReprDataCon, mkVScrut,
12 prDictOfType, prCoerce,
13 paDictArgType, paDictOfType, paDFunType,
14 paMethod, lengthPA, replicatePA, emptyPA, liftPA,
15 polyAbstract, polyApply, polyVApply,
16 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
17 buildClosure, buildClosures,
21 #include "HsVersions.h"
35 import Id ( mkWildId )
36 import MkId ( unwrapFamInstScrut )
40 import BasicTypes ( Boxity(..) )
45 import Data.List ( zipWith4 )
46 import Control.Monad ( liftM, liftM2, zipWithM_ )
48 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
49 collectAnnTypeArgs expr = go expr []
51 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
54 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
55 collectAnnTypeBinders expr = go [] expr
57 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
58 go bs e = (reverse bs, e)
60 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
61 collectAnnValBinders expr = go [] expr
63 go bs (_, AnnLam b e) | isId b = go (b:bs) e
64 go bs e = (reverse bs, e)
66 isAnnTypeArg :: AnnExpr b ann -> Bool
67 isAnnTypeArg (_, AnnType t) = True
68 isAnnTypeArg _ = False
70 mkDataConTag :: DataCon -> CoreExpr
71 mkDataConTag dc = mkConApp intDataCon [mkIntLitInt $ dataConTag dc]
73 splitUnTy :: String -> Name -> Type -> Type
75 | Just (tc, [ty']) <- splitTyConApp_maybe ty
76 , tyConName tc == name
79 | otherwise = pprPanic s (ppr ty)
81 splitBinTy :: String -> Name -> Type -> (Type, Type)
83 | Just (tc, [ty1, ty2]) <- splitTyConApp_maybe ty
84 , tyConName tc == name
87 | otherwise = pprPanic s (ppr ty)
89 splitFixedTyConApp :: TyCon -> Type -> [Type]
90 splitFixedTyConApp tc ty
91 | Just (tc', tys) <- splitTyConApp_maybe ty
95 | otherwise = pprPanic "splitFixedTyConApp" (ppr tc <+> ppr ty)
97 splitClosureTy :: Type -> (Type, Type)
98 splitClosureTy = splitBinTy "splitClosureTy" closureTyConName
100 splitPArrayTy :: Type -> Type
101 splitPArrayTy = splitUnTy "splitPArrayTy" parrayTyConName
103 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
104 mkBuiltinTyConApp get_tc tys
107 return $ mkTyConApp tc tys
109 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
110 mkBuiltinTyConApps get_tc tys ty
113 return $ foldr (mk tc) ty tys
115 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
117 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
118 mkBuiltinTyConApps1 get_tc dft [] = return dft
119 mkBuiltinTyConApps1 get_tc dft tys
123 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
124 _ -> return $ foldr1 (mk tc) tys
126 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
128 data TyConRepr = TyConRepr {
129 repr_tyvars :: [TyVar]
130 , repr_tys :: [[Type]]
132 , repr_prod_tycons :: [Maybe TyCon]
133 , repr_prod_tys :: [Type]
134 , repr_sum_tycon :: Maybe TyCon
138 mkTyConRepr :: TyCon -> VM TyConRepr
141 prod_tycons <- mapM (mk_tycon prodTyCon) rep_tys
142 let prod_tys = zipWith mk_tc_app_maybe prod_tycons rep_tys
143 sum_tycon <- mk_tycon sumTyCon prod_tys
149 , repr_prod_tycons = prod_tycons
150 , repr_prod_tys = prod_tys
151 , repr_sum_tycon = sum_tycon
152 , repr_type = mk_tc_app_maybe sum_tycon prod_tys
155 tyvars = tyConTyVars vect_tc
156 data_cons = tyConDataCons vect_tc
157 rep_tys = map dataConRepArgTys data_cons
160 | n > 1 = builtin (Just . get_tc n)
161 | otherwise = return Nothing
164 mk_tc_app_maybe Nothing [] = unitTy
165 mk_tc_app_maybe Nothing [ty] = ty
166 mk_tc_app_maybe (Just tc) tys = mkTyConApp tc tys
168 mkToPRepr :: TyConRepr -> [[CoreExpr]] -> [CoreExpr]
169 mkToPRepr (TyConRepr {
171 , repr_prod_tycons = prod_tycons
172 , repr_prod_tys = prod_tys
173 , repr_sum_tycon = repr_sum_tycon
175 = mk_sum . zipWith3 mk_prod prod_tycons repr_tys
177 Just sum_tycon = repr_sum_tycon
179 mk_sum [] = [Var unitDataConId]
180 mk_sum [expr] = [expr]
181 mk_sum exprs = zipWith (mk_alt prod_tys) (tyConDataCons sum_tycon) exprs
183 mk_alt tys dc expr = mk_con_app dc tys [expr]
185 mk_prod _ _ [] = Var unitDataConId
186 mk_prod _ _ [expr] = expr
187 mk_prod (Just tc) tys exprs = mk_con_app dc tys exprs
189 [dc] = tyConDataCons tc
191 mk_con_app dc tys exprs = mkConApp dc (map Type tys ++ exprs)
193 mkToArrPRepr :: CoreExpr -> CoreExpr -> [[CoreExpr]] -> VM CoreExpr
194 mkToArrPRepr len sel ess
196 let mk_sum [(expr, ty)] = return (expr, ty)
199 sum_tc <- builtin . sumTyCon $ length es
200 (sum_rtc, _) <- parrayReprTyCon (mkTyConApp sum_tc tys)
201 let [sum_rdc] = tyConDataCons sum_rtc
203 return (mkConApp sum_rdc (map Type tys ++ (len : sel : exprs)),
204 mkTyConApp sum_tc tys)
206 (exprs, tys) = unzip es
208 mk_prod [expr] = return (expr, splitPArrayTy (exprType expr))
211 prod_tc <- builtin . prodTyCon $ length exprs
212 (prod_rtc, _) <- parrayReprTyCon (mkTyConApp prod_tc tys)
213 let [prod_rdc] = tyConDataCons prod_rtc
215 return (mkConApp prod_rdc (map Type tys ++ (len : exprs)),
216 mkTyConApp prod_tc tys)
218 tys = map (splitPArrayTy . exprType) exprs
220 liftM fst (mk_sum =<< mapM mk_prod ess)
222 mkFromPRepr :: CoreExpr -> Type -> [([Var], CoreExpr)] -> VM CoreExpr
223 mkFromPRepr scrut res_ty alts
225 sum_tcs <- builtins sumTyCon
226 prod_tcs <- builtins prodTyCon
228 let un_sum expr ty [(vars, res)] = un_prod expr ty vars res
231 ps <- mapM (newLocalVar FSLIT("p")) tys
233 $ zipWith4 un_prod (map Var ps) tys vars rs
234 return . Case expr (mkWildId ty) res_ty
235 $ zipWith3 mk_alt sum_dcs ps bodies
237 (vars, rs) = unzip bs
238 tys = splitFixedTyConApp sum_tc ty
239 sum_tc = sum_tcs $ length bs
240 sum_dcs = tyConDataCons sum_tc
242 mk_alt dc p body = (DataAlt dc, [p], body)
244 un_prod expr ty [] r = return r
245 un_prod expr ty [var] r = return $ Let (NonRec var expr) r
246 un_prod expr ty vars r
247 = return $ Case expr (mkWildId ty) res_ty
248 [(DataAlt prod_dc, vars, r)]
250 prod_tc = prod_tcs $ length vars
251 [prod_dc] = tyConDataCons prod_tc
253 un_sum scrut (exprType scrut) alts
255 mkFromArrPRepr :: CoreExpr -> Type -> Var -> Var -> [[Var]] -> CoreExpr
257 mkFromArrPRepr scrut res_ty len sel vars res
258 = return (Var unitDataConId)
260 mkClosureType :: Type -> Type -> VM Type
261 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
263 mkClosureTypes :: [Type] -> Type -> VM Type
264 mkClosureTypes = mkBuiltinTyConApps closureTyCon
266 mkPReprType :: Type -> VM Type
267 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
269 mkPADictType :: Type -> VM Type
270 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
272 mkPArrayType :: Type -> VM Type
273 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
275 parrayCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
276 parrayCoerce repr_tc args expr
277 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
279 parray <- builtin parrayTyCon
281 let co = mkAppCoercion (mkTyConApp parray [])
282 (mkSymCoercion (mkTyConApp arg_co args))
284 return $ mkCoerce co expr
286 parrayReprTyCon :: Type -> VM (TyCon, [Type])
287 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
289 parrayReprDataCon :: Type -> VM (DataCon, [Type])
292 (tc, arg_tys) <- parrayReprTyCon ty
293 let [dc] = tyConDataCons tc
296 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
299 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
300 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
302 prDictOfType :: Type -> VM CoreExpr
304 | Just (tycon, ty_args) <- splitTyConApp_maybe orig_ty
306 dfun <- traceMaybeV "prDictOfType" (ppr tycon) (lookupTyConPR tycon)
307 prDFunApply (Var dfun) ty_args
309 prDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
312 args <- mapM mkDFunArg arg_tys
313 return $ mkApps mono_dfun args
315 mono_dfun = mkTyApps dfun tys
316 (arg_tys, _) = splitFunTys (exprType mono_dfun)
318 mkDFunArg :: Type -> VM CoreExpr
320 | Just (tycon, [arg]) <- splitTyConApp_maybe ty
322 = let name = tyConName tycon
324 get_dict | name == paTyConName = paDictOfType
325 | name == prTyConName = prDictOfType
326 | otherwise = pprPanic "mkDFunArg" (ppr ty)
330 mkDFunArg ty = pprPanic "mkDFunArg" (ppr ty)
332 prCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
333 prCoerce repr_tc args expr
334 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
336 pr_tc <- builtin prTyCon
338 let co = mkAppCoercion (mkTyConApp pr_tc [])
339 (mkSymCoercion (mkTyConApp arg_co args))
341 return $ mkCoerce co expr
343 paDictArgType :: TyVar -> VM (Maybe Type)
344 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
346 go ty k | Just k' <- kindView k = go ty k'
349 tv <- newTyVar FSLIT("a") k1
350 mty1 <- go (TyVarTy tv) k1
353 mty2 <- go (AppTy ty (TyVarTy tv)) k2
354 return $ fmap (ForAllTy tv . FunTy ty1) mty2
359 = liftM Just (mkPADictType ty)
361 go ty k = return Nothing
363 paDictOfType :: Type -> VM CoreExpr
364 paDictOfType ty = paDictOfTyApp ty_fn ty_args
366 (ty_fn, ty_args) = splitAppTys ty
368 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
369 paDictOfTyApp ty_fn ty_args
370 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
371 paDictOfTyApp (TyVarTy tv) ty_args
373 dfun <- maybeV (lookupTyVarPA tv)
374 paDFunApply dfun ty_args
375 paDictOfTyApp (TyConApp tc _) ty_args
377 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
378 paDFunApply (Var dfun) ty_args
379 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
381 paDFunType :: TyCon -> VM Type
384 margs <- mapM paDictArgType tvs
385 res <- mkPADictType (mkTyConApp tc arg_tys)
386 return . mkForAllTys tvs
387 $ mkFunTys [arg | Just arg <- margs] res
390 arg_tys = mkTyVarTys tvs
392 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
395 dicts <- mapM paDictOfType tys
396 return $ mkApps (mkTyApps dfun tys) dicts
398 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
402 dict <- paDictOfType ty
403 return $ mkApps (Var fn) [Type ty, dict]
405 mkPR :: Type -> VM CoreExpr
406 mkPR = paMethod mkPRVar
408 lengthPA :: CoreExpr -> VM CoreExpr
409 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
411 ty = splitPArrayTy (exprType x)
413 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
414 replicatePA len x = liftM (`mkApps` [len,x])
415 (paMethod replicatePAVar (exprType x))
417 emptyPA :: Type -> VM CoreExpr
418 emptyPA = paMethod emptyPAVar
420 liftPA :: CoreExpr -> VM CoreExpr
423 lc <- builtin liftingContext
424 replicatePA (Var lc) x
426 newLocalVVar :: FastString -> Type -> VM VVar
429 lty <- mkPArrayType vty
430 vv <- newLocalVar fs vty
431 lv <- newLocalVar fs lty
434 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
438 mdicts <- mapM mk_dict_var tvs
439 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
443 r <- paDictArgType tv
445 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
446 Nothing -> return Nothing
448 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
450 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
453 dicts <- mapM paDictOfType tys
454 return $ expr `mkTyApps` tys `mkApps` dicts
456 polyVApply :: VExpr -> [Type] -> VM VExpr
459 dicts <- mapM paDictOfType tys
460 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
462 hoistBinding :: Var -> CoreExpr -> VM ()
463 hoistBinding v e = updGEnv $ \env ->
464 env { global_bindings = (v,e) : global_bindings env }
466 hoistExpr :: FastString -> CoreExpr -> VM Var
469 var <- newLocalVar fs (exprType expr)
470 hoistBinding var expr
473 hoistVExpr :: VExpr -> VM VVar
477 vv <- hoistExpr ('v' `consFS` fs) ve
478 lv <- hoistExpr ('l' `consFS` fs) le
481 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
484 expr <- closedV . polyAbstract tvs $ \abstract ->
485 liftM (mapVect abstract) p
486 fn <- hoistVExpr expr
487 polyVApply (vVar fn) (mkTyVarTys tvs)
489 takeHoisted :: VM [(Var, CoreExpr)]
493 setGEnv $ env { global_bindings = [] }
494 return $ global_bindings env
496 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
497 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
499 dict <- paDictOfType env_ty
500 mkv <- builtin mkClosureVar
501 mkl <- builtin mkClosurePVar
502 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
503 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
505 mkClosureApp :: VExpr -> VExpr -> VM VExpr
506 mkClosureApp (vclo, lclo) (varg, larg)
508 vapply <- builtin applyClosureVar
509 lapply <- builtin applyClosurePVar
510 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
511 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
513 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
515 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
516 buildClosures tvs vars [] res_ty mk_body
518 buildClosures tvs vars [arg_ty] res_ty mk_body
519 = buildClosure tvs vars arg_ty res_ty mk_body
520 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
522 res_ty' <- mkClosureTypes arg_tys res_ty
523 arg <- newLocalVVar FSLIT("x") arg_ty
524 buildClosure tvs vars arg_ty res_ty'
527 lc <- builtin liftingContext
528 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
529 return $ vLams lc (vars ++ [arg]) clo
531 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
533 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
534 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
536 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
537 buildClosure tvs vars arg_ty res_ty mk_body
539 (env_ty, env, bind) <- buildEnv vars
540 env_bndr <- newLocalVVar FSLIT("env") env_ty
541 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
543 fn <- hoistPolyVExpr tvs
545 lc <- builtin liftingContext
547 body' <- bind (vVar env_bndr)
548 (vVarApps lc body (vars ++ [arg_bndr]))
549 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
551 mkClosure arg_ty res_ty env_ty fn env
553 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
556 lc <- builtin liftingContext
557 let (ty, venv, vbind) = mkVectEnv tys vs
558 (lenv, lbind) <- mkLiftEnv lc tys ls
559 return (ty, (venv, lenv),
560 \(venv,lenv) (vbody,lbody) ->
562 let vbody' = vbind venv vbody
563 lbody' <- lbind lenv lbody
564 return (vbody', lbody'))
569 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
570 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
571 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
572 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
573 \env body -> Case env (mkWildId ty) (exprType body)
574 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
578 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
579 mkLiftEnv lc [ty] [v]
580 = return (Var v, \env body ->
582 len <- lengthPA (Var v)
583 return . Let (NonRec v env)
584 $ Case len lc (exprType body) [(DEFAULT, [], body)])
586 -- NOTE: this transparently deals with empty environments
589 (env_tc, env_tyargs) <- parrayReprTyCon vty
590 let [env_con] = tyConDataCons env_tc
592 env = Var (dataConWrapId env_con)
593 `mkTyApps` env_tyargs
594 `mkVarApps` (lc : vs)
596 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
598 return $ Case scrut (mkWildId (exprType scrut))
600 [(DataAlt env_con, lc : bndrs, body)]
603 vty = mkCoreTupTy tys
605 bndrs | null vs = [mkWildId unitTy]