2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
7 TyConRepr(..), mkTyConRepr,
8 mkToArrPRepr, 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 mkToArrPRepr :: CoreExpr -> CoreExpr -> [[CoreExpr]] -> VM CoreExpr
169 mkToArrPRepr len sel ess
171 let mk_sum [(expr, ty)] = return (expr, ty)
174 sum_tc <- builtin . sumTyCon $ length es
175 (sum_rtc, _) <- parrayReprTyCon (mkTyConApp sum_tc tys)
176 let [sum_rdc] = tyConDataCons sum_rtc
178 return (mkConApp sum_rdc (map Type tys ++ (len : sel : exprs)),
179 mkTyConApp sum_tc tys)
181 (exprs, tys) = unzip es
183 mk_prod [expr] = return (expr, splitPArrayTy (exprType expr))
186 prod_tc <- builtin . prodTyCon $ length exprs
187 (prod_rtc, _) <- parrayReprTyCon (mkTyConApp prod_tc tys)
188 let [prod_rdc] = tyConDataCons prod_rtc
190 return (mkConApp prod_rdc (map Type tys ++ (len : exprs)),
191 mkTyConApp prod_tc tys)
193 tys = map (splitPArrayTy . exprType) exprs
195 liftM fst (mk_sum =<< mapM mk_prod ess)
197 mkFromArrPRepr :: CoreExpr -> Type -> Var -> Var -> [[Var]] -> CoreExpr
199 mkFromArrPRepr scrut res_ty len sel vars res
200 = return (Var unitDataConId)
202 mkClosureType :: Type -> Type -> VM Type
203 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
205 mkClosureTypes :: [Type] -> Type -> VM Type
206 mkClosureTypes = mkBuiltinTyConApps closureTyCon
208 mkPReprType :: Type -> VM Type
209 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
211 mkPADictType :: Type -> VM Type
212 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
214 mkPArrayType :: Type -> VM Type
215 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
217 parrayCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
218 parrayCoerce repr_tc args expr
219 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
221 parray <- builtin parrayTyCon
223 let co = mkAppCoercion (mkTyConApp parray [])
224 (mkSymCoercion (mkTyConApp arg_co args))
226 return $ mkCoerce co expr
228 parrayReprTyCon :: Type -> VM (TyCon, [Type])
229 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
231 parrayReprDataCon :: Type -> VM (DataCon, [Type])
234 (tc, arg_tys) <- parrayReprTyCon ty
235 let [dc] = tyConDataCons tc
238 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
241 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
242 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
244 prDictOfType :: Type -> VM CoreExpr
246 | Just (tycon, ty_args) <- splitTyConApp_maybe orig_ty
248 dfun <- traceMaybeV "prDictOfType" (ppr tycon) (lookupTyConPR tycon)
249 prDFunApply (Var dfun) ty_args
251 prDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
254 args <- mapM mkDFunArg arg_tys
255 return $ mkApps mono_dfun args
257 mono_dfun = mkTyApps dfun tys
258 (arg_tys, _) = splitFunTys (exprType mono_dfun)
260 mkDFunArg :: Type -> VM CoreExpr
262 | Just (tycon, [arg]) <- splitTyConApp_maybe ty
264 = let name = tyConName tycon
266 get_dict | name == paTyConName = paDictOfType
267 | name == prTyConName = prDictOfType
268 | otherwise = pprPanic "mkDFunArg" (ppr ty)
272 mkDFunArg ty = pprPanic "mkDFunArg" (ppr ty)
274 prCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
275 prCoerce repr_tc args expr
276 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
278 pr_tc <- builtin prTyCon
280 let co = mkAppCoercion (mkTyConApp pr_tc [])
281 (mkSymCoercion (mkTyConApp arg_co args))
283 return $ mkCoerce co expr
285 paDictArgType :: TyVar -> VM (Maybe Type)
286 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
288 go ty k | Just k' <- kindView k = go ty k'
291 tv <- newTyVar FSLIT("a") k1
292 mty1 <- go (TyVarTy tv) k1
295 mty2 <- go (AppTy ty (TyVarTy tv)) k2
296 return $ fmap (ForAllTy tv . FunTy ty1) mty2
301 = liftM Just (mkPADictType ty)
303 go ty k = return Nothing
305 paDictOfType :: Type -> VM CoreExpr
306 paDictOfType ty = paDictOfTyApp ty_fn ty_args
308 (ty_fn, ty_args) = splitAppTys ty
310 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
311 paDictOfTyApp ty_fn ty_args
312 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
313 paDictOfTyApp (TyVarTy tv) ty_args
315 dfun <- maybeV (lookupTyVarPA tv)
316 paDFunApply dfun ty_args
317 paDictOfTyApp (TyConApp tc _) ty_args
319 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
320 paDFunApply (Var dfun) ty_args
321 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
323 paDFunType :: TyCon -> VM Type
326 margs <- mapM paDictArgType tvs
327 res <- mkPADictType (mkTyConApp tc arg_tys)
328 return . mkForAllTys tvs
329 $ mkFunTys [arg | Just arg <- margs] res
332 arg_tys = mkTyVarTys tvs
334 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
337 dicts <- mapM paDictOfType tys
338 return $ mkApps (mkTyApps dfun tys) dicts
340 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
344 dict <- paDictOfType ty
345 return $ mkApps (Var fn) [Type ty, dict]
347 mkPR :: Type -> VM CoreExpr
348 mkPR = paMethod mkPRVar
350 lengthPA :: CoreExpr -> VM CoreExpr
351 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
353 ty = splitPArrayTy (exprType x)
355 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
356 replicatePA len x = liftM (`mkApps` [len,x])
357 (paMethod replicatePAVar (exprType x))
359 emptyPA :: Type -> VM CoreExpr
360 emptyPA = paMethod emptyPAVar
362 liftPA :: CoreExpr -> VM CoreExpr
365 lc <- builtin liftingContext
366 replicatePA (Var lc) x
368 newLocalVVar :: FastString -> Type -> VM VVar
371 lty <- mkPArrayType vty
372 vv <- newLocalVar fs vty
373 lv <- newLocalVar fs lty
376 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
380 mdicts <- mapM mk_dict_var tvs
381 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
385 r <- paDictArgType tv
387 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
388 Nothing -> return Nothing
390 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
392 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
395 dicts <- mapM paDictOfType tys
396 return $ expr `mkTyApps` tys `mkApps` dicts
398 polyVApply :: VExpr -> [Type] -> VM VExpr
401 dicts <- mapM paDictOfType tys
402 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
404 hoistBinding :: Var -> CoreExpr -> VM ()
405 hoistBinding v e = updGEnv $ \env ->
406 env { global_bindings = (v,e) : global_bindings env }
408 hoistExpr :: FastString -> CoreExpr -> VM Var
411 var <- newLocalVar fs (exprType expr)
412 hoistBinding var expr
415 hoistVExpr :: VExpr -> VM VVar
419 vv <- hoistExpr ('v' `consFS` fs) ve
420 lv <- hoistExpr ('l' `consFS` fs) le
423 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
426 expr <- closedV . polyAbstract tvs $ \abstract ->
427 liftM (mapVect abstract) p
428 fn <- hoistVExpr expr
429 polyVApply (vVar fn) (mkTyVarTys tvs)
431 takeHoisted :: VM [(Var, CoreExpr)]
435 setGEnv $ env { global_bindings = [] }
436 return $ global_bindings env
438 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
439 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
441 dict <- paDictOfType env_ty
442 mkv <- builtin mkClosureVar
443 mkl <- builtin mkClosurePVar
444 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
445 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
447 mkClosureApp :: VExpr -> VExpr -> VM VExpr
448 mkClosureApp (vclo, lclo) (varg, larg)
450 vapply <- builtin applyClosureVar
451 lapply <- builtin applyClosurePVar
452 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
453 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
455 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
457 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
458 buildClosures tvs vars [] res_ty mk_body
460 buildClosures tvs vars [arg_ty] res_ty mk_body
461 = buildClosure tvs vars arg_ty res_ty mk_body
462 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
464 res_ty' <- mkClosureTypes arg_tys res_ty
465 arg <- newLocalVVar FSLIT("x") arg_ty
466 buildClosure tvs vars arg_ty res_ty'
469 lc <- builtin liftingContext
470 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
471 return $ vLams lc (vars ++ [arg]) clo
473 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
475 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
476 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
478 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
479 buildClosure tvs vars arg_ty res_ty mk_body
481 (env_ty, env, bind) <- buildEnv vars
482 env_bndr <- newLocalVVar FSLIT("env") env_ty
483 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
485 fn <- hoistPolyVExpr tvs
487 lc <- builtin liftingContext
489 body' <- bind (vVar env_bndr)
490 (vVarApps lc body (vars ++ [arg_bndr]))
491 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
493 mkClosure arg_ty res_ty env_ty fn env
495 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
498 lc <- builtin liftingContext
499 let (ty, venv, vbind) = mkVectEnv tys vs
500 (lenv, lbind) <- mkLiftEnv lc tys ls
501 return (ty, (venv, lenv),
502 \(venv,lenv) (vbody,lbody) ->
504 let vbody' = vbind venv vbody
505 lbody' <- lbind lenv lbody
506 return (vbody', lbody'))
511 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
512 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
513 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
514 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
515 \env body -> Case env (mkWildId ty) (exprType body)
516 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
520 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
521 mkLiftEnv lc [ty] [v]
522 = return (Var v, \env body ->
524 len <- lengthPA (Var v)
525 return . Let (NonRec v env)
526 $ Case len lc (exprType body) [(DEFAULT, [], body)])
528 -- NOTE: this transparently deals with empty environments
531 (env_tc, env_tyargs) <- parrayReprTyCon vty
532 let [env_con] = tyConDataCons env_tc
534 env = Var (dataConWrapId env_con)
535 `mkTyApps` env_tyargs
536 `mkVarApps` (lc : vs)
538 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
540 return $ Case scrut (mkWildId (exprType scrut))
542 [(DataAlt env_con, lc : bndrs, body)]
545 vty = mkCoreTupTy tys
547 bndrs | null vs = [mkWildId unitTy]