2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
8 mkPADictType, mkPArrayType, mkPReprType,
10 parrayReprTyCon, parrayReprDataCon, mkVScrut,
12 paDictArgType, paDictOfType, paDFunType,
13 paMethod, mkPR, lengthPA, replicatePA, emptyPA, liftPA,
14 polyAbstract, polyApply, polyVApply,
15 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
16 buildClosure, buildClosures,
20 #include "HsVersions.h"
34 import Id ( mkWildId )
35 import MkId ( unwrapFamInstScrut )
39 import TysPrim ( intPrimTy )
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 = mkIntLitInt . dataConTag
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 splitPrimTyCon :: Type -> Maybe TyCon
105 | Just (tycon, []) <- splitTyConApp_maybe ty
109 | otherwise = Nothing
111 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
112 mkBuiltinTyConApp get_tc tys
115 return $ mkTyConApp tc tys
117 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
118 mkBuiltinTyConApps get_tc tys ty
121 return $ foldr (mk tc) ty tys
123 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
125 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
126 mkBuiltinTyConApps1 get_tc dft [] = return dft
127 mkBuiltinTyConApps1 get_tc dft tys
131 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
132 _ -> return $ foldr1 (mk tc) tys
134 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
136 mkClosureType :: Type -> Type -> VM Type
137 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
139 mkClosureTypes :: [Type] -> Type -> VM Type
140 mkClosureTypes = mkBuiltinTyConApps closureTyCon
142 mkPReprType :: Type -> VM Type
143 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
145 mkPADictType :: Type -> VM Type
146 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
148 mkPArrayType :: Type -> VM Type
150 | Just tycon <- splitPrimTyCon ty
152 arr <- traceMaybeV "mkPArrayType" (ppr tycon)
153 $ lookupPrimPArray tycon
154 return $ mkTyConApp arr []
155 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
157 mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion
161 return $ mkTyConApp tc []
163 parrayReprTyCon :: Type -> VM (TyCon, [Type])
164 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
166 parrayReprDataCon :: Type -> VM (DataCon, [Type])
169 (tc, arg_tys) <- parrayReprTyCon ty
170 let [dc] = tyConDataCons tc
173 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
176 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
177 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
179 prDFunOfTyCon :: TyCon -> VM CoreExpr
181 = liftM Var (traceMaybeV "prDictOfTyCon" (ppr tycon) (lookupTyConPR tycon))
183 paDictArgType :: TyVar -> VM (Maybe Type)
184 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
186 go ty k | Just k' <- kindView k = go ty k'
189 tv <- newTyVar FSLIT("a") k1
190 mty1 <- go (TyVarTy tv) k1
193 mty2 <- go (AppTy ty (TyVarTy tv)) k2
194 return $ fmap (ForAllTy tv . FunTy ty1) mty2
199 = liftM Just (mkPADictType ty)
201 go ty k = return Nothing
203 paDictOfType :: Type -> VM CoreExpr
204 paDictOfType ty = paDictOfTyApp ty_fn ty_args
206 (ty_fn, ty_args) = splitAppTys ty
208 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
209 paDictOfTyApp ty_fn ty_args
210 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
211 paDictOfTyApp (TyVarTy tv) ty_args
213 dfun <- maybeV (lookupTyVarPA tv)
214 paDFunApply dfun ty_args
215 paDictOfTyApp (TyConApp tc _) ty_args
217 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
218 paDFunApply (Var dfun) ty_args
219 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
221 paDFunType :: TyCon -> VM Type
224 margs <- mapM paDictArgType tvs
225 res <- mkPADictType (mkTyConApp tc arg_tys)
226 return . mkForAllTys tvs
227 $ mkFunTys [arg | Just arg <- margs] res
230 arg_tys = mkTyVarTys tvs
232 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
235 dicts <- mapM paDictOfType tys
236 return $ mkApps (mkTyApps dfun tys) dicts
238 type PAMethod = (Builtins -> Var, String)
240 pa_length = (lengthPAVar, "lengthPA")
241 pa_replicate = (replicatePAVar, "replicatePA")
242 pa_empty = (emptyPAVar, "emptyPA")
244 paMethod :: PAMethod -> Type -> VM CoreExpr
245 paMethod (method, name) ty
246 | Just tycon <- splitPrimTyCon ty
248 fn <- traceMaybeV "paMethod" (ppr tycon <+> text name)
249 $ lookupPrimMethod tycon name
252 paMethod (method, name) ty
255 dict <- paDictOfType ty
256 return $ mkApps (Var fn) [Type ty, dict]
258 mkPR :: Type -> VM CoreExpr
261 fn <- builtin mkPRVar
262 dict <- paDictOfType ty
263 return $ mkApps (Var fn) [Type ty, dict]
265 lengthPA :: CoreExpr -> VM CoreExpr
266 lengthPA x = liftM (`App` x) (paMethod pa_length ty)
268 ty = splitPArrayTy (exprType x)
270 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
271 replicatePA len x = liftM (`mkApps` [len,x])
272 (paMethod pa_replicate (exprType x))
274 emptyPA :: Type -> VM CoreExpr
275 emptyPA = paMethod pa_empty
277 liftPA :: CoreExpr -> VM CoreExpr
280 lc <- builtin liftingContext
281 replicatePA (Var lc) x
283 newLocalVVar :: FastString -> Type -> VM VVar
286 lty <- mkPArrayType vty
287 vv <- newLocalVar fs vty
288 lv <- newLocalVar fs lty
291 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
295 mdicts <- mapM mk_dict_var tvs
296 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
300 r <- paDictArgType tv
302 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
303 Nothing -> return Nothing
305 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
307 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
310 dicts <- mapM paDictOfType tys
311 return $ expr `mkTyApps` tys `mkApps` dicts
313 polyVApply :: VExpr -> [Type] -> VM VExpr
316 dicts <- mapM paDictOfType tys
317 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
319 hoistBinding :: Var -> CoreExpr -> VM ()
320 hoistBinding v e = updGEnv $ \env ->
321 env { global_bindings = (v,e) : global_bindings env }
323 hoistExpr :: FastString -> CoreExpr -> VM Var
326 var <- newLocalVar fs (exprType expr)
327 hoistBinding var expr
330 hoistVExpr :: VExpr -> VM VVar
334 vv <- hoistExpr ('v' `consFS` fs) ve
335 lv <- hoistExpr ('l' `consFS` fs) le
338 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
341 expr <- closedV . polyAbstract tvs $ \abstract ->
342 liftM (mapVect abstract) p
343 fn <- hoistVExpr expr
344 polyVApply (vVar fn) (mkTyVarTys tvs)
346 takeHoisted :: VM [(Var, CoreExpr)]
350 setGEnv $ env { global_bindings = [] }
351 return $ global_bindings env
353 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
354 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
356 dict <- paDictOfType env_ty
357 mkv <- builtin mkClosureVar
358 mkl <- builtin mkClosurePVar
359 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
360 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
362 mkClosureApp :: VExpr -> VExpr -> VM VExpr
363 mkClosureApp (vclo, lclo) (varg, larg)
365 vapply <- builtin applyClosureVar
366 lapply <- builtin applyClosurePVar
367 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
368 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
370 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
372 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
373 buildClosures tvs vars [] res_ty mk_body
375 buildClosures tvs vars [arg_ty] res_ty mk_body
376 = buildClosure tvs vars arg_ty res_ty mk_body
377 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
379 res_ty' <- mkClosureTypes arg_tys res_ty
380 arg <- newLocalVVar FSLIT("x") arg_ty
381 buildClosure tvs vars arg_ty res_ty'
384 lc <- builtin liftingContext
385 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
386 return $ vLams lc (vars ++ [arg]) clo
388 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
390 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
391 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
393 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
394 buildClosure tvs vars arg_ty res_ty mk_body
396 (env_ty, env, bind) <- buildEnv vars
397 env_bndr <- newLocalVVar FSLIT("env") env_ty
398 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
400 fn <- hoistPolyVExpr tvs
402 lc <- builtin liftingContext
404 body' <- bind (vVar env_bndr)
405 (vVarApps lc body (vars ++ [arg_bndr]))
406 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
408 mkClosure arg_ty res_ty env_ty fn env
410 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
413 lc <- builtin liftingContext
414 let (ty, venv, vbind) = mkVectEnv tys vs
415 (lenv, lbind) <- mkLiftEnv lc tys ls
416 return (ty, (venv, lenv),
417 \(venv,lenv) (vbody,lbody) ->
419 let vbody' = vbind venv vbody
420 lbody' <- lbind lenv lbody
421 return (vbody', lbody'))
426 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
427 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
428 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
429 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
430 \env body -> Case env (mkWildId ty) (exprType body)
431 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
435 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
436 mkLiftEnv lc [ty] [v]
437 = return (Var v, \env body ->
439 len <- lengthPA (Var v)
440 return . Let (NonRec v env)
441 $ Case len lc (exprType body) [(DEFAULT, [], body)])
443 -- NOTE: this transparently deals with empty environments
446 (env_tc, env_tyargs) <- parrayReprTyCon vty
447 let [env_con] = tyConDataCons env_tc
449 env = Var (dataConWrapId env_con)
450 `mkTyApps` env_tyargs
451 `mkVarApps` (lc : vs)
453 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
455 return $ Case scrut (mkWildId (exprType scrut))
457 [(DataAlt env_con, lc : bndrs, body)]
460 vty = mkCoreTupTy tys
462 bndrs | null vs = [mkWildId unitTy]