2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
4 mkDataConTag, mkDataConTagLit,
7 mkPADictType, mkPArrayType, mkPReprType,
9 parrayReprTyCon, parrayReprDataCon, mkVScrut,
11 paDictArgType, paDictOfType, paDFunType,
12 paMethod, mkPR, lengthPA, replicatePA, emptyPA, liftPA,
13 polyAbstract, polyApply, polyVApply,
14 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
15 buildClosure, buildClosures,
19 #include "HsVersions.h"
33 import Id ( mkWildId )
34 import MkId ( unwrapFamInstScrut )
38 import TysPrim ( intPrimTy )
39 import BasicTypes ( Boxity(..) )
40 import Literal ( Literal, mkMachInt )
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 mkDataConTagLit :: DataCon -> Literal
72 = mkMachInt . toInteger $ dataConTag con - fIRST_TAG
74 mkDataConTag :: DataCon -> CoreExpr
75 mkDataConTag con = mkIntLitInt (dataConTag con - fIRST_TAG)
77 splitPrimTyCon :: Type -> Maybe TyCon
79 | Just (tycon, []) <- splitTyConApp_maybe ty
85 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
86 mkBuiltinTyConApp get_tc tys
89 return $ mkTyConApp tc tys
91 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
92 mkBuiltinTyConApps get_tc tys ty
95 return $ foldr (mk tc) ty tys
97 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
99 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
100 mkBuiltinTyConApps1 get_tc dft [] = return dft
101 mkBuiltinTyConApps1 get_tc dft tys
105 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
106 _ -> return $ foldr1 (mk tc) tys
108 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
110 mkClosureType :: Type -> Type -> VM Type
111 mkClosureType arg_ty res_ty = mkBuiltinTyConApp closureTyCon [arg_ty, res_ty]
113 mkClosureTypes :: [Type] -> Type -> VM Type
114 mkClosureTypes = mkBuiltinTyConApps closureTyCon
116 mkPReprType :: Type -> VM Type
117 mkPReprType ty = mkBuiltinTyConApp preprTyCon [ty]
119 mkPADictType :: Type -> VM Type
120 mkPADictType ty = mkBuiltinTyConApp paTyCon [ty]
122 mkPArrayType :: Type -> VM Type
124 | Just tycon <- splitPrimTyCon ty
126 arr <- traceMaybeV "mkPArrayType" (ppr tycon)
127 $ lookupPrimPArray tycon
128 return $ mkTyConApp arr []
129 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
131 mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion
135 return $ mkTyConApp tc []
137 parrayReprTyCon :: Type -> VM (TyCon, [Type])
138 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
140 parrayReprDataCon :: Type -> VM (DataCon, [Type])
143 (tc, arg_tys) <- parrayReprTyCon ty
144 let [dc] = tyConDataCons tc
147 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
150 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
151 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
153 prDFunOfTyCon :: TyCon -> VM CoreExpr
155 = liftM Var (traceMaybeV "prDictOfTyCon" (ppr tycon) (lookupTyConPR tycon))
157 paDictArgType :: TyVar -> VM (Maybe Type)
158 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
160 go ty k | Just k' <- kindView k = go ty k'
163 tv <- newTyVar FSLIT("a") k1
164 mty1 <- go (TyVarTy tv) k1
167 mty2 <- go (AppTy ty (TyVarTy tv)) k2
168 return $ fmap (ForAllTy tv . FunTy ty1) mty2
173 = liftM Just (mkPADictType ty)
175 go ty k = return Nothing
177 paDictOfType :: Type -> VM CoreExpr
178 paDictOfType ty = paDictOfTyApp ty_fn ty_args
180 (ty_fn, ty_args) = splitAppTys ty
182 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
183 paDictOfTyApp ty_fn ty_args
184 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
185 paDictOfTyApp (TyVarTy tv) ty_args
187 dfun <- maybeV (lookupTyVarPA tv)
188 paDFunApply dfun ty_args
189 paDictOfTyApp (TyConApp tc _) ty_args
191 dfun <- traceMaybeV "paDictOfTyApp" (ppr tc) (lookupTyConPA tc)
192 paDFunApply (Var dfun) ty_args
193 paDictOfTyApp ty ty_args = pprPanic "paDictOfTyApp" (ppr ty)
195 paDFunType :: TyCon -> VM Type
198 margs <- mapM paDictArgType tvs
199 res <- mkPADictType (mkTyConApp tc arg_tys)
200 return . mkForAllTys tvs
201 $ mkFunTys [arg | Just arg <- margs] res
204 arg_tys = mkTyVarTys tvs
206 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
209 dicts <- mapM paDictOfType tys
210 return $ mkApps (mkTyApps dfun tys) dicts
212 type PAMethod = (Builtins -> Var, String)
214 pa_length = (lengthPAVar, "lengthPA")
215 pa_replicate = (replicatePAVar, "replicatePA")
216 pa_empty = (emptyPAVar, "emptyPA")
218 paMethod :: PAMethod -> Type -> VM CoreExpr
219 paMethod (method, name) ty
220 | Just tycon <- splitPrimTyCon ty
222 fn <- traceMaybeV "paMethod" (ppr tycon <+> text name)
223 $ lookupPrimMethod tycon name
226 paMethod (method, name) ty
229 dict <- paDictOfType ty
230 return $ mkApps (Var fn) [Type ty, dict]
232 mkPR :: Type -> VM CoreExpr
235 fn <- builtin mkPRVar
236 dict <- paDictOfType ty
237 return $ mkApps (Var fn) [Type ty, dict]
239 lengthPA :: Type -> CoreExpr -> VM CoreExpr
240 lengthPA ty x = liftM (`App` x) (paMethod pa_length ty)
242 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
243 replicatePA len x = liftM (`mkApps` [len,x])
244 (paMethod pa_replicate (exprType x))
246 emptyPA :: Type -> VM CoreExpr
247 emptyPA = paMethod pa_empty
249 liftPA :: CoreExpr -> VM CoreExpr
252 lc <- builtin liftingContext
253 replicatePA (Var lc) x
255 newLocalVVar :: FastString -> Type -> VM VVar
258 lty <- mkPArrayType vty
259 vv <- newLocalVar fs vty
260 lv <- newLocalVar fs lty
263 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
267 mdicts <- mapM mk_dict_var tvs
268 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
272 r <- paDictArgType tv
274 Just ty -> liftM Just (newLocalVar FSLIT("dPA") ty)
275 Nothing -> return Nothing
277 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
279 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
282 dicts <- mapM paDictOfType tys
283 return $ expr `mkTyApps` tys `mkApps` dicts
285 polyVApply :: VExpr -> [Type] -> VM VExpr
288 dicts <- mapM paDictOfType tys
289 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
291 hoistBinding :: Var -> CoreExpr -> VM ()
292 hoistBinding v e = updGEnv $ \env ->
293 env { global_bindings = (v,e) : global_bindings env }
295 hoistExpr :: FastString -> CoreExpr -> VM Var
298 var <- newLocalVar fs (exprType expr)
299 hoistBinding var expr
302 hoistVExpr :: VExpr -> VM VVar
306 vv <- hoistExpr ('v' `consFS` fs) ve
307 lv <- hoistExpr ('l' `consFS` fs) le
310 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
313 expr <- closedV . polyAbstract tvs $ \abstract ->
314 liftM (mapVect abstract) p
315 fn <- hoistVExpr expr
316 polyVApply (vVar fn) (mkTyVarTys tvs)
318 takeHoisted :: VM [(Var, CoreExpr)]
322 setGEnv $ env { global_bindings = [] }
323 return $ global_bindings env
325 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
326 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
328 dict <- paDictOfType env_ty
329 mkv <- builtin mkClosureVar
330 mkl <- builtin mkClosurePVar
331 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
332 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
334 mkClosureApp :: Type -> Type -> VExpr -> VExpr -> VM VExpr
335 mkClosureApp arg_ty res_ty (vclo, lclo) (varg, larg)
337 vapply <- builtin applyClosureVar
338 lapply <- builtin applyClosurePVar
339 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
340 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
342 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
343 buildClosures tvs vars [] res_ty mk_body
345 buildClosures tvs vars [arg_ty] res_ty mk_body
346 = buildClosure tvs vars arg_ty res_ty mk_body
347 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
349 res_ty' <- mkClosureTypes arg_tys res_ty
350 arg <- newLocalVVar FSLIT("x") arg_ty
351 buildClosure tvs vars arg_ty res_ty'
354 lc <- builtin liftingContext
355 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
356 return $ vLams lc (vars ++ [arg]) clo
358 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
360 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
361 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
363 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
364 buildClosure tvs vars arg_ty res_ty mk_body
366 (env_ty, env, bind) <- buildEnv vars
367 env_bndr <- newLocalVVar FSLIT("env") env_ty
368 arg_bndr <- newLocalVVar FSLIT("arg") arg_ty
370 fn <- hoistPolyVExpr tvs
372 lc <- builtin liftingContext
374 body' <- bind (vVar env_bndr)
375 (vVarApps lc body (vars ++ [arg_bndr]))
376 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
378 mkClosure arg_ty res_ty env_ty fn env
380 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
383 lc <- builtin liftingContext
384 let (ty, venv, vbind) = mkVectEnv tys vs
385 (lenv, lbind) <- mkLiftEnv lc tys ls
386 return (ty, (venv, lenv),
387 \(venv,lenv) (vbody,lbody) ->
389 let vbody' = vbind venv vbody
390 lbody' <- lbind lenv lbody
391 return (vbody', lbody'))
396 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
397 mkVectEnv [] [] = (unitTy, Var unitDataConId, \env body -> body)
398 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
399 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
400 \env body -> Case env (mkWildId ty) (exprType body)
401 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
405 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
406 mkLiftEnv lc [ty] [v]
407 = return (Var v, \env body ->
409 len <- lengthPA ty (Var v)
410 return . Let (NonRec v env)
411 $ Case len lc (exprType body) [(DEFAULT, [], body)])
413 -- NOTE: this transparently deals with empty environments
416 (env_tc, env_tyargs) <- parrayReprTyCon vty
417 let [env_con] = tyConDataCons env_tc
419 env = Var (dataConWrapId env_con)
420 `mkTyApps` env_tyargs
421 `mkVarApps` (lc : vs)
423 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
425 return $ Case scrut (mkWildId (exprType scrut))
427 [(DataAlt env_con, lc : bndrs, body)]
430 vty = mkCoreTupTy tys
432 bndrs | null vs = [mkWildId unitTy]