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 BasicTypes ( Boxity(..) )
44 import Maybes ( orElse )
46 import Data.List ( zipWith4 )
47 import Control.Monad ( liftM, liftM2, zipWithM_ )
49 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
50 collectAnnTypeArgs expr = go expr []
52 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
55 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
56 collectAnnTypeBinders expr = go [] expr
58 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
59 go bs e = (reverse bs, e)
61 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
62 collectAnnValBinders expr = go [] expr
64 go bs (_, AnnLam b e) | isId b = go (b:bs) e
65 go bs e = (reverse bs, e)
67 isAnnTypeArg :: AnnExpr b ann -> Bool
68 isAnnTypeArg (_, AnnType t) = True
69 isAnnTypeArg _ = False
71 mkDataConTag :: DataCon -> CoreExpr
72 mkDataConTag dc = mkConApp intDataCon [mkIntLitInt $ dataConTag dc]
74 splitUnTy :: String -> Name -> Type -> Type
76 | Just (tc, [ty']) <- splitTyConApp_maybe ty
77 , tyConName tc == name
80 | otherwise = pprPanic s (ppr ty)
82 splitBinTy :: String -> Name -> Type -> (Type, Type)
84 | Just (tc, [ty1, ty2]) <- splitTyConApp_maybe ty
85 , tyConName tc == name
88 | otherwise = pprPanic s (ppr ty)
90 splitFixedTyConApp :: TyCon -> Type -> [Type]
91 splitFixedTyConApp tc ty
92 | Just (tc', tys) <- splitTyConApp_maybe ty
96 | otherwise = pprPanic "splitFixedTyConApp" (ppr tc <+> ppr ty)
98 splitClosureTy :: Type -> (Type, Type)
99 splitClosureTy = splitBinTy "splitClosureTy" closureTyConName
101 splitPArrayTy :: Type -> Type
102 splitPArrayTy = splitUnTy "splitPArrayTy" parrayTyConName
104 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
105 mkBuiltinTyConApp get_tc tys
108 return $ mkTyConApp tc tys
110 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
111 mkBuiltinTyConApps get_tc tys ty
114 return $ foldr (mk tc) ty tys
116 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
118 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
119 mkBuiltinTyConApps1 get_tc dft [] = return dft
120 mkBuiltinTyConApps1 get_tc dft tys
124 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
125 _ -> return $ foldr1 (mk tc) tys
127 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
129 data TyConRepr = TyConRepr {
130 repr_tyvars :: [TyVar]
131 , repr_tys :: [[Type]]
133 , repr_prod_tycons :: [Maybe TyCon]
134 , repr_prod_data_cons :: [Maybe DataCon]
135 , repr_prod_tys :: [Type]
136 , repr_sum_tycon :: Maybe TyCon
137 , repr_sum_data_cons :: [DataCon]
141 mkTyConRepr :: TyCon -> VM TyConRepr
144 prod_tycons <- mapM (mk_tycon prodTyCon) rep_tys
145 let prod_tys = zipWith mk_tc_app_maybe prod_tycons rep_tys
146 sum_tycon <- mk_tycon sumTyCon prod_tys
152 , repr_prod_tycons = prod_tycons
153 , repr_prod_data_cons = map (fmap mk_single_datacon) prod_tycons
154 , repr_prod_tys = prod_tys
155 , repr_sum_tycon = sum_tycon
156 , repr_sum_data_cons = fmap tyConDataCons sum_tycon `orElse` []
157 , repr_type = mk_tc_app_maybe sum_tycon prod_tys
160 tyvars = tyConTyVars vect_tc
161 data_cons = tyConDataCons vect_tc
162 rep_tys = map dataConRepArgTys data_cons
165 | n > 1 = builtin (Just . get_tc n)
166 | otherwise = return Nothing
169 mk_single_datacon tc | [dc] <- tyConDataCons tc = dc
171 mk_tc_app_maybe Nothing [] = unitTy
172 mk_tc_app_maybe Nothing [ty] = ty
173 mk_tc_app_maybe (Just tc) tys = mkTyConApp tc tys
175 mkToArrPRepr :: CoreExpr -> CoreExpr -> [[CoreExpr]] -> VM CoreExpr
176 mkToArrPRepr len sel ess
178 let mk_sum [(expr, ty)] = return (expr, ty)
181 sum_tc <- builtin . sumTyCon $ length es
182 (sum_rtc, _) <- parrayReprTyCon (mkTyConApp sum_tc tys)
183 let [sum_rdc] = tyConDataCons sum_rtc
185 return (mkConApp sum_rdc (map Type tys ++ (len : sel : exprs)),
186 mkTyConApp sum_tc tys)
188 (exprs, tys) = unzip es
190 mk_prod [expr] = return (expr, splitPArrayTy (exprType expr))
193 prod_tc <- builtin . prodTyCon $ length exprs
194 (prod_rtc, _) <- parrayReprTyCon (mkTyConApp prod_tc tys)
195 let [prod_rdc] = tyConDataCons prod_rtc
197 return (mkConApp prod_rdc (map Type tys ++ (len : exprs)),
198 mkTyConApp prod_tc tys)
200 tys = map (splitPArrayTy . exprType) exprs
202 liftM fst (mk_sum =<< mapM mk_prod ess)
204 mkFromArrPRepr :: CoreExpr -> Type -> Var -> Var -> [[Var]] -> CoreExpr
206 mkFromArrPRepr scrut res_ty len sel vars res
207 = return (Var unitDataConId)
209 mkClosureType :: Type -> Type -> VM Type
210 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
212 mkClosureTypes :: [Type] -> Type -> VM Type
213 mkClosureTypes = mkBuiltinTyConApps closureTyCon
215 mkPReprType :: Type -> VM Type
216 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
218 mkPADictType :: Type -> VM Type
219 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
221 mkPArrayType :: Type -> VM Type
222 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
224 parrayCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
225 parrayCoerce repr_tc args expr
226 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
228 parray <- builtin parrayTyCon
230 let co = mkAppCoercion (mkTyConApp parray [])
231 (mkSymCoercion (mkTyConApp arg_co args))
233 return $ mkCoerce co expr
235 parrayReprTyCon :: Type -> VM (TyCon, [Type])
236 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
238 parrayReprDataCon :: Type -> VM (DataCon, [Type])
241 (tc, arg_tys) <- parrayReprTyCon ty
242 let [dc] = tyConDataCons tc
245 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
248 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
249 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
251 prDFunOfTyCon :: TyCon -> VM CoreExpr
253 = liftM Var (traceMaybeV "prDictOfTyCon" (ppr tycon) (lookupTyConPR tycon))
255 prCoerce :: TyCon -> [Type] -> CoreExpr -> VM CoreExpr
256 prCoerce repr_tc args expr
257 | Just arg_co <- tyConFamilyCoercion_maybe repr_tc
259 pr_tc <- builtin prTyCon
261 let co = mkAppCoercion (mkTyConApp pr_tc [])
262 (mkSymCoercion (mkTyConApp arg_co args))
264 return $ mkCoerce co expr
266 paDictArgType :: TyVar -> VM (Maybe Type)
267 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
269 go ty k | Just k' <- kindView k = go ty k'
272 tv <- newTyVar FSLIT("a") k1
273 mty1 <- go (TyVarTy tv) k1
276 mty2 <- go (AppTy ty (TyVarTy tv)) k2
277 return $ fmap (ForAllTy tv . FunTy ty1) mty2
282 = liftM Just (mkPADictType ty)
284 go ty k = return Nothing
286 paDictOfType :: Type -> VM CoreExpr
287 paDictOfType ty = paDictOfTyApp ty_fn ty_args
289 (ty_fn, ty_args) = splitAppTys ty
291 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
292 paDictOfTyApp ty_fn ty_args
293 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
294 paDictOfTyApp (TyVarTy tv) ty_args
296 dfun <- maybeV (lookupTyVarPA tv)
297 paDFunApply dfun ty_args
298 paDictOfTyApp (TyConApp tc _) ty_args
300 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
301 paDFunApply (Var dfun) ty_args
302 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
304 paDFunType :: TyCon -> VM Type
307 margs <- mapM paDictArgType tvs
308 res <- mkPADictType (mkTyConApp tc arg_tys)
309 return . mkForAllTys tvs
310 $ mkFunTys [arg | Just arg <- margs] res
313 arg_tys = mkTyVarTys tvs
315 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
318 dicts <- mapM paDictOfType tys
319 return $ mkApps (mkTyApps dfun tys) dicts
321 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
325 dict <- paDictOfType ty
326 return $ mkApps (Var fn) [Type ty, dict]
328 mkPR :: Type -> VM CoreExpr
329 mkPR = paMethod mkPRVar
331 lengthPA :: CoreExpr -> VM CoreExpr
332 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
334 ty = splitPArrayTy (exprType x)
336 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
337 replicatePA len x = liftM (`mkApps` [len,x])
338 (paMethod replicatePAVar (exprType x))
340 emptyPA :: Type -> VM CoreExpr
341 emptyPA = paMethod emptyPAVar
343 liftPA :: CoreExpr -> VM CoreExpr
346 lc <- builtin liftingContext
347 replicatePA (Var lc) x
349 newLocalVVar :: FastString -> Type -> VM VVar
352 lty <- mkPArrayType vty
353 vv <- newLocalVar fs vty
354 lv <- newLocalVar fs lty
357 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
361 mdicts <- mapM mk_dict_var tvs
362 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
366 r <- paDictArgType tv
368 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
369 Nothing -> return Nothing
371 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
373 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
376 dicts <- mapM paDictOfType tys
377 return $ expr `mkTyApps` tys `mkApps` dicts
379 polyVApply :: VExpr -> [Type] -> VM VExpr
382 dicts <- mapM paDictOfType tys
383 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
385 hoistBinding :: Var -> CoreExpr -> VM ()
386 hoistBinding v e = updGEnv $ \env ->
387 env { global_bindings = (v,e) : global_bindings env }
389 hoistExpr :: FastString -> CoreExpr -> VM Var
392 var <- newLocalVar fs (exprType expr)
393 hoistBinding var expr
396 hoistVExpr :: VExpr -> VM VVar
400 vv <- hoistExpr ('v' `consFS` fs) ve
401 lv <- hoistExpr ('l' `consFS` fs) le
404 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
407 expr <- closedV . polyAbstract tvs $ \abstract ->
408 liftM (mapVect abstract) p
409 fn <- hoistVExpr expr
410 polyVApply (vVar fn) (mkTyVarTys tvs)
412 takeHoisted :: VM [(Var, CoreExpr)]
416 setGEnv $ env { global_bindings = [] }
417 return $ global_bindings env
419 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
420 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
422 dict <- paDictOfType env_ty
423 mkv <- builtin mkClosureVar
424 mkl <- builtin mkClosurePVar
425 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
426 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
428 mkClosureApp :: VExpr -> VExpr -> VM VExpr
429 mkClosureApp (vclo, lclo) (varg, larg)
431 vapply <- builtin applyClosureVar
432 lapply <- builtin applyClosurePVar
433 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
434 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
436 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
438 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
439 buildClosures tvs vars [] res_ty mk_body
441 buildClosures tvs vars [arg_ty] res_ty mk_body
442 = buildClosure tvs vars arg_ty res_ty mk_body
443 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
445 res_ty' <- mkClosureTypes arg_tys res_ty
446 arg <- newLocalVVar FSLIT("x") arg_ty
447 buildClosure tvs vars arg_ty res_ty'
450 lc <- builtin liftingContext
451 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
452 return $ vLams lc (vars ++ [arg]) clo
454 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
456 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
457 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
459 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
460 buildClosure tvs vars arg_ty res_ty mk_body
462 (env_ty, env, bind) <- buildEnv vars
463 env_bndr <- newLocalVVar FSLIT("env") env_ty
464 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
466 fn <- hoistPolyVExpr tvs
468 lc <- builtin liftingContext
470 body' <- bind (vVar env_bndr)
471 (vVarApps lc body (vars ++ [arg_bndr]))
472 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
474 mkClosure arg_ty res_ty env_ty fn env
476 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
479 lc <- builtin liftingContext
480 let (ty, venv, vbind) = mkVectEnv tys vs
481 (lenv, lbind) <- mkLiftEnv lc tys ls
482 return (ty, (venv, lenv),
483 \(venv,lenv) (vbody,lbody) ->
485 let vbody' = vbind venv vbody
486 lbody' <- lbind lenv lbody
487 return (vbody', lbody'))
492 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
493 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
494 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
495 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
496 \env body -> Case env (mkWildId ty) (exprType body)
497 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
501 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
502 mkLiftEnv lc [ty] [v]
503 = return (Var v, \env body ->
505 len <- lengthPA (Var v)
506 return . Let (NonRec v env)
507 $ Case len lc (exprType body) [(DEFAULT, [], body)])
509 -- NOTE: this transparently deals with empty environments
512 (env_tc, env_tyargs) <- parrayReprTyCon vty
513 let [env_con] = tyConDataCons env_tc
515 env = Var (dataConWrapId env_con)
516 `mkTyApps` env_tyargs
517 `mkVarApps` (lc : vs)
519 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
521 return $ Case scrut (mkWildId (exprType scrut))
523 [(DataAlt env_con, lc : bndrs, body)]
526 vty = mkCoreTupTy tys
528 bndrs | null vs = [mkWildId unitTy]