2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
7 TyConRepr(..), mkTyConRepr,
8 mkToArrPRepr, mkFromArrPRepr,
9 mkPADictType, mkPArrayType, mkPReprType,
11 parrayCoerce, parrayReprTyCon, parrayReprDataCon, mkVScrut,
12 prDFunOfTyCon, prCoerce,
13 paDictArgType, paDictOfType, paDFunType,
14 paMethod, mkPR, 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 TysPrim ( intPrimTy )
41 import BasicTypes ( Boxity(..) )
45 import Maybes ( orElse )
47 import Data.List ( zipWith4 )
48 import Control.Monad ( liftM, liftM2, zipWithM_ )
50 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
51 collectAnnTypeArgs expr = go expr []
53 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
56 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
57 collectAnnTypeBinders expr = go [] expr
59 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
60 go bs e = (reverse bs, e)
62 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
63 collectAnnValBinders expr = go [] expr
65 go bs (_, AnnLam b e) | isId b = go (b:bs) e
66 go bs e = (reverse bs, e)
68 isAnnTypeArg :: AnnExpr b ann -> Bool
69 isAnnTypeArg (_, AnnType t) = True
70 isAnnTypeArg _ = False
72 mkDataConTag :: DataCon -> CoreExpr
73 mkDataConTag dc = mkConApp intDataCon [mkIntLitInt $ dataConTag dc]
75 splitUnTy :: String -> Name -> Type -> Type
77 | Just (tc, [ty']) <- splitTyConApp_maybe ty
78 , tyConName tc == name
81 | otherwise = pprPanic s (ppr ty)
83 splitBinTy :: String -> Name -> Type -> (Type, Type)
85 | Just (tc, [ty1, ty2]) <- splitTyConApp_maybe ty
86 , tyConName tc == name
89 | otherwise = pprPanic s (ppr ty)
91 splitFixedTyConApp :: TyCon -> Type -> [Type]
92 splitFixedTyConApp tc ty
93 | Just (tc', tys) <- splitTyConApp_maybe ty
97 | otherwise = pprPanic "splitFixedTyConApp" (ppr tc <+> ppr ty)
99 splitClosureTy :: Type -> (Type, Type)
100 splitClosureTy = splitBinTy "splitClosureTy" closureTyConName
102 splitPArrayTy :: Type -> Type
103 splitPArrayTy = splitUnTy "splitPArrayTy" parrayTyConName
105 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
106 mkBuiltinTyConApp get_tc tys
109 return $ mkTyConApp tc tys
111 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
112 mkBuiltinTyConApps get_tc tys ty
115 return $ foldr (mk tc) ty tys
117 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
119 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
120 mkBuiltinTyConApps1 get_tc dft [] = return dft
121 mkBuiltinTyConApps1 get_tc dft tys
125 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
126 _ -> return $ foldr1 (mk tc) tys
128 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
130 data TyConRepr = TyConRepr {
131 repr_tyvars :: [TyVar]
132 , repr_tys :: [[Type]]
133 , arr_shape_tys :: [Type]
134 , arr_repr_tys :: [[Type]]
136 , repr_prod_tycons :: [Maybe TyCon]
137 , repr_prod_data_cons :: [Maybe DataCon]
138 , repr_prod_tys :: [Type]
139 , repr_sum_tycon :: Maybe TyCon
140 , repr_sum_data_cons :: [DataCon]
144 mkTyConRepr :: TyCon -> VM TyConRepr
147 uarr <- builtin uarrTyCon
148 prod_tycons <- mapM (mk_tycon prodTyCon) rep_tys
149 let prod_tys = zipWith mk_tc_app_maybe prod_tycons rep_tys
150 sum_tycon <- mk_tycon sumTyCon prod_tys
151 arr_repr_tys <- mapM (mapM mkPArrayType . arr_repr_elem_tys) rep_tys
156 , arr_shape_tys = mk_shape uarr
157 , arr_repr_tys = arr_repr_tys
159 , repr_prod_tycons = prod_tycons
160 , repr_prod_data_cons = map (fmap mk_single_datacon) prod_tycons
161 , repr_prod_tys = prod_tys
162 , repr_sum_tycon = sum_tycon
163 , repr_sum_data_cons = fmap tyConDataCons sum_tycon `orElse` []
164 , repr_type = mk_tc_app_maybe sum_tycon prod_tys
167 tyvars = tyConTyVars vect_tc
168 data_cons = tyConDataCons vect_tc
169 rep_tys = map dataConRepArgTys data_cons
171 is_product | [_] <- data_cons = True
174 mk_shape uarr = intPrimTy : mk_sel uarr
176 mk_sel uarr | is_product = []
177 | otherwise = [uarr_int, uarr_int]
179 uarr_int = mkTyConApp uarr [intTy]
182 | n > 1 = builtin (Just . get_tc n)
183 | otherwise = return Nothing
186 mk_single_datacon tc | [dc] <- tyConDataCons tc = dc
188 mk_tc_app_maybe Nothing [] = unitTy
189 mk_tc_app_maybe Nothing [ty] = ty
190 mk_tc_app_maybe (Just tc) tys = mkTyConApp tc tys
192 arr_repr_elem_tys [] = [unitTy]
193 arr_repr_elem_tys tys = tys
195 mkToArrPRepr :: CoreExpr -> CoreExpr -> [[CoreExpr]] -> VM CoreExpr
196 mkToArrPRepr len sel ess
198 let mk_sum [(expr, ty)] = return (expr, ty)
201 sum_tc <- builtin . sumTyCon $ length es
202 (sum_rtc, _) <- parrayReprTyCon (mkTyConApp sum_tc tys)
203 let [sum_rdc] = tyConDataCons sum_rtc
205 return (mkConApp sum_rdc (map Type tys ++ (len : sel : exprs)),
206 mkTyConApp sum_tc tys)
208 (exprs, tys) = unzip es
210 mk_prod [expr] = return (expr, splitPArrayTy (exprType expr))
213 prod_tc <- builtin . prodTyCon $ length exprs
214 (prod_rtc, _) <- parrayReprTyCon (mkTyConApp prod_tc tys)
215 let [prod_rdc] = tyConDataCons prod_rtc
217 return (mkConApp prod_rdc (map Type tys ++ (len : exprs)),
218 mkTyConApp prod_tc tys)
220 tys = map (splitPArrayTy . exprType) exprs
222 liftM fst (mk_sum =<< mapM mk_prod ess)
224 mkFromArrPRepr :: CoreExpr -> Type -> Var -> Var -> [[Var]] -> CoreExpr
226 mkFromArrPRepr scrut res_ty len sel vars res
227 = return (Var unitDataConId)
229 mkClosureType :: Type -> Type -> VM Type
230 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
232 mkClosureTypes :: [Type] -> Type -> VM Type
233 mkClosureTypes = mkBuiltinTyConApps closureTyCon
235 mkPReprType :: Type -> VM Type
236 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
238 mkPADictType :: Type -> VM Type
239 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
241 mkPArrayType :: Type -> VM Type
242 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
244 parrayCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
245 parrayCoerce repr_tc args expr
246 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
248 parray <- builtin parrayTyCon
250 let co = mkAppCoercion (mkTyConApp parray [])
251 (mkSymCoercion (mkTyConApp arg_co args))
253 return $ mkCoerce co expr
255 parrayReprTyCon :: Type -> VM (TyCon, [Type])
256 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
258 parrayReprDataCon :: Type -> VM (DataCon, [Type])
261 (tc, arg_tys) <- parrayReprTyCon ty
262 let [dc] = tyConDataCons tc
265 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
268 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
269 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
271 prDFunOfTyCon :: TyCon -> VM CoreExpr
273 = liftM Var (traceMaybeV "prDictOfTyCon" (ppr tycon) (lookupTyConPR tycon))
275 prCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
276 prCoerce repr_tc args expr
277 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
279 pr_tc <- builtin prTyCon
281 let co = mkAppCoercion (mkTyConApp pr_tc [])
282 (mkSymCoercion (mkTyConApp arg_co args))
284 return $ mkCoerce co expr
286 paDictArgType :: TyVar -> VM (Maybe Type)
287 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
289 go ty k | Just k' <- kindView k = go ty k'
292 tv <- newTyVar FSLIT("a") k1
293 mty1 <- go (TyVarTy tv) k1
296 mty2 <- go (AppTy ty (TyVarTy tv)) k2
297 return $ fmap (ForAllTy tv . FunTy ty1) mty2
302 = liftM Just (mkPADictType ty)
304 go ty k = return Nothing
306 paDictOfType :: Type -> VM CoreExpr
307 paDictOfType ty = paDictOfTyApp ty_fn ty_args
309 (ty_fn, ty_args) = splitAppTys ty
311 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
312 paDictOfTyApp ty_fn ty_args
313 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
314 paDictOfTyApp (TyVarTy tv) ty_args
316 dfun <- maybeV (lookupTyVarPA tv)
317 paDFunApply dfun ty_args
318 paDictOfTyApp (TyConApp tc _) ty_args
320 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
321 paDFunApply (Var dfun) ty_args
322 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
324 paDFunType :: TyCon -> VM Type
327 margs <- mapM paDictArgType tvs
328 res <- mkPADictType (mkTyConApp tc arg_tys)
329 return . mkForAllTys tvs
330 $ mkFunTys [arg | Just arg <- margs] res
333 arg_tys = mkTyVarTys tvs
335 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
338 dicts <- mapM paDictOfType tys
339 return $ mkApps (mkTyApps dfun tys) dicts
341 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
345 dict <- paDictOfType ty
346 return $ mkApps (Var fn) [Type ty, dict]
348 mkPR :: Type -> VM CoreExpr
349 mkPR = paMethod mkPRVar
351 lengthPA :: CoreExpr -> VM CoreExpr
352 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
354 ty = splitPArrayTy (exprType x)
356 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
357 replicatePA len x = liftM (`mkApps` [len,x])
358 (paMethod replicatePAVar (exprType x))
360 emptyPA :: Type -> VM CoreExpr
361 emptyPA = paMethod emptyPAVar
363 liftPA :: CoreExpr -> VM CoreExpr
366 lc <- builtin liftingContext
367 replicatePA (Var lc) x
369 newLocalVVar :: FastString -> Type -> VM VVar
372 lty <- mkPArrayType vty
373 vv <- newLocalVar fs vty
374 lv <- newLocalVar fs lty
377 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
381 mdicts <- mapM mk_dict_var tvs
382 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
386 r <- paDictArgType tv
388 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
389 Nothing -> return Nothing
391 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
393 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
396 dicts <- mapM paDictOfType tys
397 return $ expr `mkTyApps` tys `mkApps` dicts
399 polyVApply :: VExpr -> [Type] -> VM VExpr
402 dicts <- mapM paDictOfType tys
403 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
405 hoistBinding :: Var -> CoreExpr -> VM ()
406 hoistBinding v e = updGEnv $ \env ->
407 env { global_bindings = (v,e) : global_bindings env }
409 hoistExpr :: FastString -> CoreExpr -> VM Var
412 var <- newLocalVar fs (exprType expr)
413 hoistBinding var expr
416 hoistVExpr :: VExpr -> VM VVar
420 vv <- hoistExpr ('v' `consFS` fs) ve
421 lv <- hoistExpr ('l' `consFS` fs) le
424 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
427 expr <- closedV . polyAbstract tvs $ \abstract ->
428 liftM (mapVect abstract) p
429 fn <- hoistVExpr expr
430 polyVApply (vVar fn) (mkTyVarTys tvs)
432 takeHoisted :: VM [(Var, CoreExpr)]
436 setGEnv $ env { global_bindings = [] }
437 return $ global_bindings env
439 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
440 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
442 dict <- paDictOfType env_ty
443 mkv <- builtin mkClosureVar
444 mkl <- builtin mkClosurePVar
445 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
446 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
448 mkClosureApp :: VExpr -> VExpr -> VM VExpr
449 mkClosureApp (vclo, lclo) (varg, larg)
451 vapply <- builtin applyClosureVar
452 lapply <- builtin applyClosurePVar
453 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
454 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
456 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
458 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
459 buildClosures tvs vars [] res_ty mk_body
461 buildClosures tvs vars [arg_ty] res_ty mk_body
462 = buildClosure tvs vars arg_ty res_ty mk_body
463 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
465 res_ty' <- mkClosureTypes arg_tys res_ty
466 arg <- newLocalVVar FSLIT("x") arg_ty
467 buildClosure tvs vars arg_ty res_ty'
470 lc <- builtin liftingContext
471 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
472 return $ vLams lc (vars ++ [arg]) clo
474 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
476 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
477 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
479 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
480 buildClosure tvs vars arg_ty res_ty mk_body
482 (env_ty, env, bind) <- buildEnv vars
483 env_bndr <- newLocalVVar FSLIT("env") env_ty
484 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
486 fn <- hoistPolyVExpr tvs
488 lc <- builtin liftingContext
490 body' <- bind (vVar env_bndr)
491 (vVarApps lc body (vars ++ [arg_bndr]))
492 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
494 mkClosure arg_ty res_ty env_ty fn env
496 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
499 lc <- builtin liftingContext
500 let (ty, venv, vbind) = mkVectEnv tys vs
501 (lenv, lbind) <- mkLiftEnv lc tys ls
502 return (ty, (venv, lenv),
503 \(venv,lenv) (vbody,lbody) ->
505 let vbody' = vbind venv vbody
506 lbody' <- lbind lenv lbody
507 return (vbody', lbody'))
512 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
513 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
514 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
515 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
516 \env body -> Case env (mkWildId ty) (exprType body)
517 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
521 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
522 mkLiftEnv lc [ty] [v]
523 = return (Var v, \env body ->
525 len <- lengthPA (Var v)
526 return . Let (NonRec v env)
527 $ Case len lc (exprType body) [(DEFAULT, [], body)])
529 -- NOTE: this transparently deals with empty environments
532 (env_tc, env_tyargs) <- parrayReprTyCon vty
533 let [env_con] = tyConDataCons env_tc
535 env = Var (dataConWrapId env_con)
536 `mkTyApps` env_tyargs
537 `mkVarApps` (lc : vs)
539 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
541 return $ Case scrut (mkWildId (exprType scrut))
543 [(DataAlt env_con, lc : bndrs, body)]
546 vty = mkCoreTupTy tys
548 bndrs | null vs = [mkWildId unitTy]