2 collectAnnTypeBinders, collectAnnTypeArgs, isAnnTypeArg,
4 dataConTagZ, mkDataConTag, mkDataConTagLit,
9 mkPADictType, mkPArrayType, mkPReprType,
11 parrayReprTyCon, parrayReprDataCon, mkVScrut,
13 paDictArgType, paDictOfType, paDFunType,
14 paMethod, mkPR, lengthPA, replicatePA, emptyPA, packPA, combinePA, liftPA,
15 polyAbstract, polyApply, polyVApply,
16 hoistBinding, hoistExpr, hoistPolyVExpr, takeHoisted,
17 buildClosure, buildClosures,
33 import MkId ( unwrapFamInstScrut )
35 import BasicTypes ( Boxity(..) )
36 import Literal ( Literal, mkMachInt )
44 collectAnnTypeArgs :: AnnExpr b ann -> (AnnExpr b ann, [Type])
45 collectAnnTypeArgs expr = go expr []
47 go (_, AnnApp f (_, AnnType ty)) tys = go f (ty : tys)
50 collectAnnTypeBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
51 collectAnnTypeBinders expr = go [] expr
53 go bs (_, AnnLam b e) | isTyVar b = go (b:bs) e
54 go bs e = (reverse bs, e)
56 collectAnnValBinders :: AnnExpr Var ann -> ([Var], AnnExpr Var ann)
57 collectAnnValBinders expr = go [] expr
59 go bs (_, AnnLam b e) | isId b = go (b:bs) e
60 go bs e = (reverse bs, e)
62 isAnnTypeArg :: AnnExpr b ann -> Bool
63 isAnnTypeArg (_, AnnType _) = True
64 isAnnTypeArg _ = False
66 dataConTagZ :: DataCon -> Int
67 dataConTagZ con = dataConTag con - fIRST_TAG
69 mkDataConTagLit :: DataCon -> Literal
70 mkDataConTagLit = mkMachInt . toInteger . dataConTagZ
72 mkDataConTag :: DataCon -> CoreExpr
73 mkDataConTag = mkIntLitInt . dataConTagZ
75 splitPrimTyCon :: Type -> Maybe TyCon
77 | Just (tycon, []) <- splitTyConApp_maybe ty
83 mkBuiltinTyConApp :: (Builtins -> TyCon) -> [Type] -> VM Type
84 mkBuiltinTyConApp get_tc tys
87 return $ mkTyConApp tc tys
89 mkBuiltinTyConApps :: (Builtins -> TyCon) -> [Type] -> Type -> VM Type
90 mkBuiltinTyConApps get_tc tys ty
93 return $ foldr (mk tc) ty tys
95 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
98 mkBuiltinTyConApps1 :: (Builtins -> TyCon) -> Type -> [Type] -> VM Type
99 mkBuiltinTyConApps1 _ dft [] = return dft
100 mkBuiltinTyConApps1 get_tc _ tys
104 [] -> pprPanic "mkBuiltinTyConApps1" (ppr tc)
105 _ -> return $ foldr1 (mk tc) tys
107 mk tc ty1 ty2 = mkTyConApp tc [ty1,ty2]
109 mkClosureType :: Type -> Type -> VM Type
110 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 r <- lookupPrimPArray tycon
128 Just arr -> return $ mkTyConApp arr []
129 Nothing -> cantVectorise "Primitive tycon not vectorised" (ppr tycon)
130 mkPArrayType ty = mkBuiltinTyConApp parrayTyCon [ty]
132 mkBuiltinCo :: (Builtins -> TyCon) -> VM Coercion
136 return $ mkTyConApp tc []
138 parrayReprTyCon :: Type -> VM (TyCon, [Type])
139 parrayReprTyCon ty = builtin parrayTyCon >>= (`lookupFamInst` [ty])
141 parrayReprDataCon :: Type -> VM (DataCon, [Type])
144 (tc, arg_tys) <- parrayReprTyCon ty
145 let [dc] = tyConDataCons tc
148 mkVScrut :: VExpr -> VM (VExpr, TyCon, [Type])
151 (tc, arg_tys) <- parrayReprTyCon (exprType ve)
152 return ((ve, unwrapFamInstScrut tc arg_tys le), tc, arg_tys)
154 prDFunOfTyCon :: TyCon -> VM CoreExpr
157 . maybeCantVectoriseM "No PR dictionary for tycon" (ppr tycon)
158 $ lookupTyConPR tycon
160 paDictArgType :: TyVar -> VM (Maybe Type)
161 paDictArgType tv = go (TyVarTy tv) (tyVarKind tv)
163 go ty k | Just k' <- kindView k = go ty k'
166 tv <- newTyVar (fsLit "a") k1
167 mty1 <- go (TyVarTy tv) k1
170 mty2 <- go (AppTy ty (TyVarTy tv)) k2
171 return $ fmap (ForAllTy tv . FunTy ty1) mty2
176 = liftM Just (mkPADictType ty)
178 go _ _ = return Nothing
180 paDictOfType :: Type -> VM CoreExpr
181 paDictOfType ty = paDictOfTyApp ty_fn ty_args
183 (ty_fn, ty_args) = splitAppTys ty
185 paDictOfTyApp :: Type -> [Type] -> VM CoreExpr
186 paDictOfTyApp ty_fn ty_args
187 | Just ty_fn' <- coreView ty_fn = paDictOfTyApp ty_fn' ty_args
188 paDictOfTyApp (TyVarTy tv) ty_args
190 dfun <- maybeV (lookupTyVarPA tv)
191 paDFunApply dfun ty_args
192 paDictOfTyApp (TyConApp tc _) ty_args
194 dfun <- maybeCantVectoriseM "No PA dictionary for tycon" (ppr tc)
196 paDFunApply (Var dfun) ty_args
198 = cantVectorise "Can't construct PA dictionary for type" (ppr ty)
200 paDFunType :: TyCon -> VM Type
203 margs <- mapM paDictArgType tvs
204 res <- mkPADictType (mkTyConApp tc arg_tys)
205 return . mkForAllTys tvs
206 $ mkFunTys [arg | Just arg <- margs] res
209 arg_tys = mkTyVarTys tvs
211 paDFunApply :: CoreExpr -> [Type] -> VM CoreExpr
214 dicts <- mapM paDictOfType tys
215 return $ mkApps (mkTyApps dfun tys) dicts
217 type PAMethod = (Builtins -> Var, String)
219 pa_length, pa_replicate, pa_empty, pa_pack :: (Builtins -> Var, String)
220 pa_length = (lengthPAVar, "lengthPA")
221 pa_replicate = (replicatePAVar, "replicatePA")
222 pa_empty = (emptyPAVar, "emptyPA")
223 pa_pack = (packPAVar, "packPA")
225 paMethod :: PAMethod -> Type -> VM CoreExpr
226 paMethod (_method, name) ty
227 | Just tycon <- splitPrimTyCon ty
229 . maybeCantVectoriseM "No PA method" (text name <+> text "for" <+> ppr tycon)
230 $ lookupPrimMethod tycon name
232 paMethod (method, _name) ty
235 dict <- paDictOfType ty
236 return $ mkApps (Var fn) [Type ty, dict]
238 mkPR :: Type -> VM CoreExpr
241 fn <- builtin mkPRVar
242 dict <- paDictOfType ty
243 return $ mkApps (Var fn) [Type ty, dict]
245 lengthPA :: Type -> CoreExpr -> VM CoreExpr
246 lengthPA ty x = liftM (`App` x) (paMethod pa_length ty)
248 replicatePA :: CoreExpr -> CoreExpr -> VM CoreExpr
249 replicatePA len x = liftM (`mkApps` [len,x])
250 (paMethod pa_replicate (exprType x))
252 emptyPA :: Type -> VM CoreExpr
253 emptyPA = paMethod pa_empty
255 packPA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> VM CoreExpr
256 packPA ty xs len sel = liftM (`mkApps` [xs, len, sel])
257 (paMethod pa_pack ty)
259 combinePA :: Type -> CoreExpr -> CoreExpr -> CoreExpr -> [CoreExpr]
261 combinePA ty len sel is xs
262 = liftM (`mkApps` (len : sel : is : xs))
263 (paMethod (combinePAVar n, "combine" ++ show n ++ "PA") ty)
267 liftPA :: CoreExpr -> VM CoreExpr
270 lc <- builtin liftingContext
271 replicatePA (Var lc) x
273 newLocalVVar :: FastString -> Type -> VM VVar
276 lty <- mkPArrayType vty
277 vv <- newLocalVar fs vty
278 lv <- newLocalVar fs lty
281 polyAbstract :: [TyVar] -> ((CoreExpr -> CoreExpr) -> VM a) -> VM a
285 mdicts <- mapM mk_dict_var tvs
286 zipWithM_ (\tv -> maybe (defLocalTyVar tv) (defLocalTyVarWithPA tv . Var)) tvs mdicts
290 r <- paDictArgType tv
292 Just ty -> liftM Just (newLocalVar (fsLit "dPA") ty)
293 Nothing -> return Nothing
295 mk_lams mdicts = mkLams (tvs ++ [dict | Just dict <- mdicts])
297 polyApply :: CoreExpr -> [Type] -> VM CoreExpr
300 dicts <- mapM paDictOfType tys
301 return $ expr `mkTyApps` tys `mkApps` dicts
303 polyVApply :: VExpr -> [Type] -> VM VExpr
306 dicts <- mapM paDictOfType tys
307 return $ mapVect (\e -> e `mkTyApps` tys `mkApps` dicts) expr
309 hoistBinding :: Var -> CoreExpr -> VM ()
310 hoistBinding v e = updGEnv $ \env ->
311 env { global_bindings = (v,e) : global_bindings env }
313 hoistExpr :: FastString -> CoreExpr -> VM Var
316 var <- newLocalVar fs (exprType expr)
317 hoistBinding var expr
320 hoistVExpr :: VExpr -> VM VVar
324 vv <- hoistExpr ('v' `consFS` fs) ve
325 lv <- hoistExpr ('l' `consFS` fs) le
328 hoistPolyVExpr :: [TyVar] -> VM VExpr -> VM VExpr
331 expr <- closedV . polyAbstract tvs $ \abstract ->
332 liftM (mapVect abstract) p
333 fn <- hoistVExpr expr
334 polyVApply (vVar fn) (mkTyVarTys tvs)
336 takeHoisted :: VM [(Var, CoreExpr)]
340 setGEnv $ env { global_bindings = [] }
341 return $ global_bindings env
344 boxExpr :: Type -> VExpr -> VM VExpr
345 boxExpr ty (vexpr, lexpr)
346 | Just (tycon, []) <- splitTyConApp_maybe ty
347 , isUnLiftedTyCon tycon
349 r <- lookupBoxedTyCon tycon
351 Just tycon' -> let [dc] = tyConDataCons tycon'
353 return (mkConApp dc [vexpr], lexpr)
354 Nothing -> return (vexpr, lexpr)
357 mkClosure :: Type -> Type -> Type -> VExpr -> VExpr -> VM VExpr
358 mkClosure arg_ty res_ty env_ty (vfn,lfn) (venv,lenv)
360 dict <- paDictOfType env_ty
361 mkv <- builtin mkClosureVar
362 mkl <- builtin mkClosurePVar
363 return (Var mkv `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, venv],
364 Var mkl `mkTyApps` [arg_ty, res_ty, env_ty] `mkApps` [dict, vfn, lfn, lenv])
366 mkClosureApp :: Type -> Type -> VExpr -> VExpr -> VM VExpr
367 mkClosureApp arg_ty res_ty (vclo, lclo) (varg, larg)
369 vapply <- builtin applyClosureVar
370 lapply <- builtin applyClosurePVar
371 return (Var vapply `mkTyApps` [arg_ty, res_ty] `mkApps` [vclo, varg],
372 Var lapply `mkTyApps` [arg_ty, res_ty] `mkApps` [lclo, larg])
374 buildClosures :: [TyVar] -> [VVar] -> [Type] -> Type -> VM VExpr -> VM VExpr
375 buildClosures _ _ [] _ mk_body
377 buildClosures tvs vars [arg_ty] res_ty mk_body
378 = buildClosure tvs vars arg_ty res_ty mk_body
379 buildClosures tvs vars (arg_ty : arg_tys) res_ty mk_body
381 res_ty' <- mkClosureTypes arg_tys res_ty
382 arg <- newLocalVVar (fsLit "x") arg_ty
383 buildClosure tvs vars arg_ty res_ty'
386 lc <- builtin liftingContext
387 clo <- buildClosures tvs (vars ++ [arg]) arg_tys res_ty mk_body
388 return $ vLams lc (vars ++ [arg]) clo
390 -- (clo <x1,...,xn> <f,f^>, aclo (Arr lc xs1 ... xsn) <f,f^>)
392 -- f = \env v -> case env of <x1,...,xn> -> e x1 ... xn v
393 -- f^ = \env v -> case env of Arr l xs1 ... xsn -> e^ l x1 ... xn v
395 buildClosure :: [TyVar] -> [VVar] -> Type -> Type -> VM VExpr -> VM VExpr
396 buildClosure tvs vars arg_ty res_ty mk_body
398 (env_ty, env, bind) <- buildEnv vars
399 env_bndr <- newLocalVVar (fsLit "env") env_ty
400 arg_bndr <- newLocalVVar (fsLit "arg") arg_ty
402 fn <- hoistPolyVExpr tvs
404 lc <- builtin liftingContext
406 body' <- bind (vVar env_bndr)
407 (vVarApps lc body (vars ++ [arg_bndr]))
408 return (vLamsWithoutLC [env_bndr, arg_bndr] body')
410 mkClosure arg_ty res_ty env_ty fn env
412 buildEnv :: [VVar] -> VM (Type, VExpr, VExpr -> VExpr -> VM VExpr)
415 lc <- builtin liftingContext
416 let (ty, venv, vbind) = mkVectEnv tys vs
417 (lenv, lbind) <- mkLiftEnv lc tys ls
418 return (ty, (venv, lenv),
419 \(venv,lenv) (vbody,lbody) ->
421 let vbody' = vbind venv vbody
422 lbody' <- lbind lenv lbody
423 return (vbody', lbody'))
428 mkVectEnv :: [Type] -> [Var] -> (Type, CoreExpr, CoreExpr -> CoreExpr -> CoreExpr)
429 mkVectEnv [] [] = (unitTy, Var unitDataConId, \_ body -> body)
430 mkVectEnv [ty] [v] = (ty, Var v, \env body -> Let (NonRec v env) body)
431 mkVectEnv tys vs = (ty, mkCoreTup (map Var vs),
432 \env body -> mkWildCase env ty (exprType body)
433 [(DataAlt (tupleCon Boxed (length vs)), vs, body)])
437 mkLiftEnv :: Var -> [Type] -> [Var] -> VM (CoreExpr, CoreExpr -> CoreExpr -> VM CoreExpr)
438 mkLiftEnv lc [ty] [v]
439 = return (Var v, \env body ->
441 len <- lengthPA ty (Var v)
442 return . Let (NonRec v env)
443 $ Case len lc (exprType body) [(DEFAULT, [], body)])
445 -- NOTE: this transparently deals with empty environments
448 (env_tc, env_tyargs) <- parrayReprTyCon vty
450 bndrs <- if null vs then do
451 v <- newDummyVar unitTy
454 let [env_con] = tyConDataCons env_tc
456 env = Var (dataConWrapId env_con)
457 `mkTyApps` env_tyargs
458 `mkApps` (Var lc : args)
460 bind env body = let scrut = unwrapFamInstScrut env_tc env_tyargs env
462 return $ mkWildCase scrut (exprType scrut)
464 [(DataAlt env_con, lc : bndrs, body)]
467 vty = mkCoreTupTy tys
469 args | null vs = [Var unitDataConId]
470 | otherwise = map Var vs