2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
6 mkPReprType, mkPReprAlts,
7 mkPADictType, mkPArrayType,
8 parrayReprTyCon, parrayReprDataCon, mkVScrut,
9 paDictArgType, paDictOfType, paDFunType,
10 paMethod, lengthPA, replicatePA, emptyPA, liftPA,
11 polyAbstract, polyApply, polyVApply,
12 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
13 buildClosure, buildClosures,
17 #include "HsVersions.h"
28 import DataCon ( DataCon, dataConWrapId, dataConTag )
30 import Id ( mkWildId )
31 import MkId ( unwrapFamInstScrut )
35 import BasicTypes ( Boxity(..) )
40 import Control.Monad ( liftM, zipWithM_ )
42 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
43 collectAnnTypeArgs expr = go expr []
45 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
48 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
49 collectAnnTypeBinders expr = go [] expr
51 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
52 go bs e = (reverse bs, e)
54 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
55 collectAnnValBinders expr = go [] expr
57 go bs (_, AnnLam b e) | isId b = go (b:bs) e
58 go bs e = (reverse bs, e)
60 isAnnTypeArg :: AnnExpr b ann -> Bool
61 isAnnTypeArg (_, AnnType t) = True
62 isAnnTypeArg _ = False
64 mkDataConTag :: DataCon -> CoreExpr
65 mkDataConTag dc = mkConApp intDataCon [mkIntLitInt $ dataConTag dc]
67 splitUnTy :: String -> Name -> Type -> Type
69 | Just (tc, [ty']) <- splitTyConApp_maybe ty
70 , tyConName tc == name
73 | otherwise = pprPanic s (ppr ty)
75 splitBinTy :: String -> Name -> Type -> (Type, Type)
77 | Just (tc, [ty1, ty2]) <- splitTyConApp_maybe ty
78 , tyConName tc == name
81 | otherwise = pprPanic s (ppr ty)
83 splitCrossTy :: Type -> (Type, Type)
84 splitCrossTy = splitBinTy "splitCrossTy" ndpCrossTyConName
86 splitPlusTy :: Type -> (Type, Type)
87 splitPlusTy = splitBinTy "splitSumTy" ndpPlusTyConName
89 splitEmbedTy :: Type -> Type
90 splitEmbedTy = splitUnTy "splitEmbedTy" embedTyConName
92 splitClosureTy :: Type -> (Type, Type)
93 splitClosureTy = splitBinTy "splitClosureTy" closureTyConName
95 splitPArrayTy :: Type -> Type
96 splitPArrayTy = splitUnTy "splitPArrayTy" parrayTyConName
98 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
99 mkBuiltinTyConApp get_tc tys
102 return $ mkTyConApp tc tys
104 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
105 mkBuiltinTyConApps get_tc tys ty
108 return $ foldr (mk tc) ty tys
110 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
112 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
113 mkBuiltinTyConApps1 get_tc dft [] = return dft
114 mkBuiltinTyConApps1 get_tc dft tys
118 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
119 _ -> return $ foldr1 (mk tc) tys
121 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
123 mkPReprType :: [[Type]] -> VM Type
124 mkPReprType [] = return unitTy
127 embed <- builtin embedTyCon
128 cross <- builtin crossTyCon
129 plus <- builtin plusTyCon
131 let mk_embed ty = mkTyConApp embed [ty]
132 mk_cross ty1 ty2 = mkTyConApp cross [ty1, ty2]
133 mk_plus ty1 ty2 = mkTyConApp plus [ty1, ty2]
136 mk_tup tys = foldr1 mk_cross tys
139 mk_sum tys = foldr1 mk_plus tys
142 . map (mk_tup . map mk_embed)
145 mkPReprAlts :: [[CoreExpr]] -> VM ([CoreExpr], Type)
148 embed_tc <- builtin embedTyCon
149 embed_dc <- builtin embedDataCon
150 cross_tc <- builtin crossTyCon
151 cross_dc <- builtin crossDataCon
152 plus_tc <- builtin plusTyCon
153 left_dc <- builtin leftDataCon
154 right_dc <- builtin rightDataCon
156 let mk_embed (expr, ty, pa)
157 = (mkConApp embed_dc [Type ty, pa, expr],
158 mkTyConApp embed_tc [ty])
160 mk_cross (expr1, ty1) (expr2, ty2)
161 = (mkConApp cross_dc [Type ty1, Type ty2, expr1, expr2],
162 mkTyConApp cross_tc [ty1, ty2])
164 mk_tup [] = (Var unitDataConId, unitTy)
165 mk_tup es = foldr1 mk_cross es
167 mk_sum [] = ([Var unitDataConId], unitTy)
168 mk_sum [(expr, ty)] = ([expr], ty)
169 mk_sum ((expr, lty) : es)
170 = let (alts, rty) = mk_sum es
172 (mkConApp left_dc [Type lty, Type rty, expr]
173 : [mkConApp right_dc [Type lty, Type rty, alt] | alt <- alts],
174 mkTyConApp plus_tc [lty, rty])
176 liftM (mk_sum . map (mk_tup . map mk_embed))
177 (mapM (mapM init) ess)
179 init expr = let ty = exprType expr
181 pa <- paDictOfType ty
182 return (expr, ty, pa)
184 mkClosureType :: Type -> Type -> VM Type
185 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
187 mkClosureTypes :: [Type] -> Type -> VM Type
188 mkClosureTypes = mkBuiltinTyConApps closureTyCon
190 mkPADictType :: Type -> VM Type
191 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
193 mkPArrayType :: Type -> VM Type
194 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
196 parrayReprTyCon :: Type -> VM (TyCon, [Type])
197 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
199 parrayReprDataCon :: Type -> VM (DataCon, [Type])
202 (tc, arg_tys) <- parrayReprTyCon ty
203 let [dc] = tyConDataCons tc
206 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
209 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
210 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
212 paDictArgType :: TyVar -> VM (Maybe Type)
213 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
215 go ty k | Just k' <- kindView k = go ty k'
218 tv <- newTyVar FSLIT("a") k1
219 mty1 <- go (TyVarTy tv) k1
222 mty2 <- go (AppTy ty (TyVarTy tv)) k2
223 return $ fmap (ForAllTy tv . FunTy ty1) mty2
228 = liftM Just (mkPADictType ty)
230 go ty k = return Nothing
232 paDictOfType :: Type -> VM CoreExpr
233 paDictOfType ty = paDictOfTyApp ty_fn ty_args
235 (ty_fn, ty_args) = splitAppTys ty
237 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
238 paDictOfTyApp ty_fn ty_args
239 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
240 paDictOfTyApp (TyVarTy tv) ty_args
242 dfun <- maybeV (lookupTyVarPA tv)
243 paDFunApply dfun ty_args
244 paDictOfTyApp (TyConApp tc _) ty_args
246 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
247 paDFunApply (Var dfun) ty_args
248 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
250 paDFunType :: TyCon -> VM Type
253 margs <- mapM paDictArgType tvs
254 res <- mkPADictType (mkTyConApp tc arg_tys)
255 return . mkForAllTys tvs
256 $ mkFunTys [arg | Just arg <- margs] res
259 arg_tys = mkTyVarTys tvs
261 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
264 dicts <- mapM paDictOfType tys
265 return $ mkApps (mkTyApps dfun tys) dicts
267 paMethod :: (Builtins -> Var) -> Type -> VM CoreExpr
271 dict <- paDictOfType ty
272 return $ mkApps (Var fn) [Type ty, dict]
274 lengthPA :: CoreExpr -> VM CoreExpr
275 lengthPA x = liftM (`App` x) (paMethod lengthPAVar ty)
277 ty = splitPArrayTy (exprType x)
279 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
280 replicatePA len x = liftM (`mkApps` [len,x])
281 (paMethod replicatePAVar (exprType x))
283 emptyPA :: Type -> VM CoreExpr
284 emptyPA = paMethod emptyPAVar
286 liftPA :: CoreExpr -> VM CoreExpr
289 lc <- builtin liftingContext
290 replicatePA (Var lc) x
292 newLocalVVar :: FastString -> Type -> VM VVar
295 lty <- mkPArrayType vty
296 vv <- newLocalVar fs vty
297 lv <- newLocalVar fs lty
300 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
304 mdicts <- mapM mk_dict_var tvs
305 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
309 r <- paDictArgType tv
311 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
312 Nothing -> return Nothing
314 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
316 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
319 dicts <- mapM paDictOfType tys
320 return $ expr `mkTyApps` tys `mkApps` dicts
322 polyVApply :: VExpr -> [Type] -> VM VExpr
325 dicts <- mapM paDictOfType tys
326 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
328 hoistBinding :: Var -> CoreExpr -> VM ()
329 hoistBinding v e = updGEnv $ \env ->
330 env { global_bindings = (v,e) : global_bindings env }
332 hoistExpr :: FastString -> CoreExpr -> VM Var
335 var <- newLocalVar fs (exprType expr)
336 hoistBinding var expr
339 hoistVExpr :: VExpr -> VM VVar
343 vv <- hoistExpr ('v' `consFS` fs) ve
344 lv <- hoistExpr ('l' `consFS` fs) le
347 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
350 expr <- closedV . polyAbstract tvs $ \abstract ->
351 liftM (mapVect abstract) p
352 fn <- hoistVExpr expr
353 polyVApply (vVar fn) (mkTyVarTys tvs)
355 takeHoisted :: VM [(Var, CoreExpr)]
359 setGEnv $ env { global_bindings = [] }
360 return $ global_bindings env
362 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
363 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
365 dict <- paDictOfType env_ty
366 mkv <- builtin mkClosureVar
367 mkl <- builtin mkClosurePVar
368 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
369 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
371 mkClosureApp :: VExpr -> VExpr -> VM VExpr
372 mkClosureApp (vclo, lclo) (varg, larg)
374 vapply <- builtin applyClosureVar
375 lapply <- builtin applyClosurePVar
376 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
377 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
379 (arg_ty, res_ty) = splitClosureTy (exprType vclo)
381 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
382 buildClosures tvs vars [] res_ty mk_body
384 buildClosures tvs vars [arg_ty] res_ty mk_body
385 = buildClosure tvs vars arg_ty res_ty mk_body
386 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
388 res_ty' <- mkClosureTypes arg_tys res_ty
389 arg <- newLocalVVar FSLIT("x") arg_ty
390 buildClosure tvs vars arg_ty res_ty'
393 lc <- builtin liftingContext
394 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
395 return $ vLams lc (vars ++ [arg]) clo
397 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
399 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
400 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
402 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
403 buildClosure tvs vars arg_ty res_ty mk_body
405 (env_ty, env, bind) <- buildEnv vars
406 env_bndr <- newLocalVVar FSLIT("env") env_ty
407 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
409 fn <- hoistPolyVExpr tvs
411 lc <- builtin liftingContext
413 body' <- bind (vVar env_bndr)
414 (vVarApps lc body (vars ++ [arg_bndr]))
415 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
417 mkClosure arg_ty res_ty env_ty fn env
419 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
422 lc <- builtin liftingContext
423 let (ty, venv, vbind) = mkVectEnv tys vs
424 (lenv, lbind) <- mkLiftEnv lc tys ls
425 return (ty, (venv, lenv),
426 \(venv,lenv) (vbody,lbody) ->
428 let vbody' = vbind venv vbody
429 lbody' <- lbind lenv lbody
430 return (vbody', lbody'))
435 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
436 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
437 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
438 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
439 \env body -> Case env (mkWildId ty) (exprType body)
440 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
444 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
445 mkLiftEnv lc [ty] [v]
446 = return (Var v, \env body ->
448 len <- lengthPA (Var v)
449 return . Let (NonRec v env)
450 $ Case len lc (exprType body) [(DEFAULT, [], body)])
452 -- NOTE: this transparently deals with empty environments
455 (env_tc, env_tyargs) <- parrayReprTyCon vty
456 let [env_con] = tyConDataCons env_tc
458 env = Var (dataConWrapId env_con)
459 `mkTyApps` env_tyargs
460 `mkVarApps` (lc : vs)
462 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
464 return $ Case scrut (mkWildId (exprType scrut))
466 [(DataAlt env_con, lc : bndrs, body)]
469 vty = mkCoreTupTy tys
471 bndrs | null vs = [mkWildId unitTy]