1 module VectType ( vectTyCon, vectType, vectTypeEnv,
2 PAInstance, buildPADict )
5 #include "HsVersions.h"
11 import HscTypes ( TypeEnv, extendTypeEnvList, typeEnvTyCons )
20 import FamInstEnv ( FamInst, mkLocalFamInst )
21 import InstEnv ( Instance, mkLocalInstance, instanceDFunId )
24 import BasicTypes ( StrictnessMark(..), OverlapFlag(..), boolToRecFlag )
26 import Id ( mkWildId )
27 import Name ( Name, getOccName )
29 import TysWiredIn ( unitTy, unitTyCon, intTy, intDataCon, unitDataConId )
30 import TysPrim ( intPrimTy )
35 import Digraph ( SCC(..), stronglyConnComp )
39 import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_, mapAndUnzipM )
40 import Data.List ( inits, tails, zipWith4, zipWith5 )
42 -- ----------------------------------------------------------------------------
45 vectTyCon :: TyCon -> VM TyCon
47 | isFunTyCon tc = builtin closureTyCon
48 | isBoxedTupleTyCon tc = return tc
49 | isUnLiftedTyCon tc = return tc
53 Just tc' -> return tc'
55 -- FIXME: just for now
56 Nothing -> pprTrace "ccTyCon:" (ppr tc) $ return tc
58 vectType :: Type -> VM Type
59 vectType ty | Just ty' <- coreView ty = vectType ty'
60 vectType (TyVarTy tv) = return $ TyVarTy tv
61 vectType (AppTy ty1 ty2) = liftM2 AppTy (vectType ty1) (vectType ty2)
62 vectType (TyConApp tc tys) = liftM2 TyConApp (vectTyCon tc) (mapM vectType tys)
63 vectType (FunTy ty1 ty2) = liftM2 TyConApp (builtin closureTyCon)
64 (mapM vectType [ty1,ty2])
65 vectType ty@(ForAllTy _ _)
67 mdicts <- mapM paDictArgType tyvars
68 mono_ty' <- vectType mono_ty
69 return $ tyvars `mkForAllTys` ([dict | Just dict <- mdicts] `mkFunTys` mono_ty')
71 (tyvars, mono_ty) = splitForAllTys ty
73 vectType ty = pprPanic "vectType:" (ppr ty)
75 -- ----------------------------------------------------------------------------
78 type TyConGroup = ([TyCon], UniqSet TyCon)
80 data PAInstance = PAInstance {
82 , painstOrigTyCon :: TyCon
83 , painstVectTyCon :: TyCon
84 , painstArrTyCon :: TyCon
87 vectTypeEnv :: TypeEnv -> VM (TypeEnv, [FamInst], [(Var, CoreExpr)])
90 cs <- readGEnv $ mk_map . global_tycons
91 let (conv_tcs, keep_tcs) = classifyTyCons cs groups
92 keep_dcs = concatMap tyConDataCons keep_tcs
93 zipWithM_ defTyCon keep_tcs keep_tcs
94 zipWithM_ defDataCon keep_dcs keep_dcs
95 new_tcs <- vectTyConDecls conv_tcs
97 let orig_tcs = keep_tcs ++ conv_tcs
98 vect_tcs = keep_tcs ++ new_tcs
100 repr_tcs <- zipWithM buildPReprTyCon orig_tcs vect_tcs
101 parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
102 dfuns <- mapM mkPADFun vect_tcs
103 defTyConPAs (zip vect_tcs dfuns)
104 binds <- sequence (zipWith5 buildTyConBindings orig_tcs
110 let all_new_tcs = new_tcs ++ repr_tcs ++ parr_tcs
112 let new_env = extendTypeEnvList env
113 (map ATyCon all_new_tcs
114 ++ [ADataCon dc | tc <- all_new_tcs
115 , dc <- tyConDataCons tc])
117 return (new_env, map mkLocalFamInst (repr_tcs ++ parr_tcs), concat binds)
119 tycons = typeEnvTyCons env
120 groups = tyConGroups tycons
122 mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env]
124 keep_tc tc = let dcs = tyConDataCons tc
126 defTyCon tc tc >> zipWithM_ defDataCon dcs dcs
129 vectTyConDecls :: [TyCon] -> VM [TyCon]
130 vectTyConDecls tcs = fixV $ \tcs' ->
132 mapM_ (uncurry defTyCon) (lazy_zip tcs tcs')
133 mapM vectTyConDecl tcs
136 lazy_zip (x:xs) ~(y:ys) = (x,y) : lazy_zip xs ys
138 vectTyConDecl :: TyCon -> VM TyCon
141 name' <- cloneName mkVectTyConOcc name
142 rhs' <- vectAlgTyConRhs (algTyConRhs tc)
144 liftDs $ buildAlgTyCon name'
146 [] -- no stupid theta
148 rec_flag -- FIXME: is this ok?
149 False -- FIXME: no generics
150 False -- not GADT syntax
151 Nothing -- not a family instance
154 tyvars = tyConTyVars tc
155 rec_flag = boolToRecFlag (isRecursiveTyCon tc)
157 vectAlgTyConRhs :: AlgTyConRhs -> VM AlgTyConRhs
158 vectAlgTyConRhs (DataTyCon { data_cons = data_cons
162 data_cons' <- mapM vectDataCon data_cons
163 zipWithM_ defDataCon data_cons data_cons'
164 return $ DataTyCon { data_cons = data_cons'
168 vectDataCon :: DataCon -> VM DataCon
170 | not . null $ dataConExTyVars dc = pprPanic "vectDataCon: existentials" (ppr dc)
171 | not . null $ dataConEqSpec dc = pprPanic "vectDataCon: eq spec" (ppr dc)
174 name' <- cloneName mkVectDataConOcc name
175 tycon' <- vectTyCon tycon
176 arg_tys <- mapM vectType rep_arg_tys
178 liftDs $ buildDataCon name'
180 (map (const NotMarkedStrict) arg_tys)
181 [] -- no labelled fields
183 [] -- no existential tvs for now
184 [] -- no eq spec for now
189 name = dataConName dc
190 univ_tvs = dataConUnivTyVars dc
191 rep_arg_tys = dataConRepArgTys dc
192 tycon = dataConTyCon dc
194 mk_fam_inst :: TyCon -> TyCon -> (TyCon, [Type])
195 mk_fam_inst fam_tc arg_tc
196 = (fam_tc, [mkTyConApp arg_tc . mkTyVarTys $ tyConTyVars arg_tc])
198 buildPReprTyCon :: TyCon -> TyCon -> VM TyCon
199 buildPReprTyCon orig_tc vect_tc
201 name <- cloneName mkPReprTyConOcc (tyConName orig_tc)
202 rhs_ty <- buildPReprType vect_tc
203 prepr_tc <- builtin preprTyCon
204 liftDs $ buildSynTyCon name
206 (SynonymTyCon rhs_ty)
207 (Just $ mk_fam_inst prepr_tc vect_tc)
209 tyvars = tyConTyVars vect_tc
212 data Repr = ProdRepr {
213 prod_components :: [Type]
214 , prod_tycon :: TyCon
215 , prod_data_con :: DataCon
216 , prod_arr_tycon :: TyCon
217 , prod_arr_data_con :: DataCon
221 sum_components :: [Repr]
223 , sum_arr_tycon :: TyCon
224 , sum_arr_data_con :: DataCon
227 mkProduct :: [Type] -> VM Repr
230 tycon <- builtin (prodTyCon arity)
231 let [data_con] = tyConDataCons tycon
233 (arr_tycon, _) <- parrayReprTyCon $ mkTyConApp tycon tys
234 let [arr_data_con] = tyConDataCons arr_tycon
237 prod_components = tys
239 , prod_data_con = data_con
240 , prod_arr_tycon = arr_tycon
241 , prod_arr_data_con = arr_data_con
246 mkSum :: [Repr] -> VM Repr
247 mkSum [repr] = return repr
250 tycon <- builtin (sumTyCon arity)
251 (arr_tycon, _) <- parrayReprTyCon
255 let [arr_data_con] = tyConDataCons arr_tycon
258 sum_components = reprs
260 , sum_arr_tycon = arr_tycon
261 , sum_arr_data_con = arr_data_con
266 reprProducts :: Repr -> [Repr]
267 reprProducts (SumRepr { sum_components = rs }) = rs
268 reprProducts repr = [repr]
270 reprType :: Repr -> Type
271 reprType (ProdRepr { prod_tycon = tycon, prod_components = tys })
272 = mkTyConApp tycon tys
273 reprType (SumRepr { sum_tycon = tycon, sum_components = reprs })
274 = mkTyConApp tycon (map reprType reprs)
276 arrReprType :: Repr -> VM Type
277 arrReprType = mkPArrayType . reprType
279 reprTys :: Repr -> [[Type]]
280 reprTys (SumRepr { sum_components = prods }) = map prodTys prods
281 reprTys prod = [prodTys prod]
283 prodTys (ProdRepr { prod_components = tys }) = tys
285 reprVars :: Repr -> VM [[Var]]
286 reprVars = mapM (mapM (newLocalVar FSLIT("r"))) . reprTys
288 arrShapeTys :: Repr -> VM [Type]
289 arrShapeTys (SumRepr {})
291 uarr <- builtin uarrTyCon
292 return [intPrimTy, mkTyConApp uarr [intTy]]
293 arrShapeTys repr = return [intPrimTy]
295 arrShapeVars :: Repr -> VM [Var]
296 arrShapeVars repr = mapM (newLocalVar FSLIT("sh")) =<< arrShapeTys repr
298 replicateShape :: Repr -> CoreExpr -> CoreExpr -> VM [CoreExpr]
299 replicateShape (ProdRepr {}) len _ = return [len]
301 arrReprElemTys :: Repr -> [[Type]]
302 arrReprElemTys (SumRepr { sum_components = prods })
303 = map arrProdElemTys prods
304 arrReprElemTys prod@(ProdRepr {})
305 = [arrProdElemTys prod]
307 arrProdElemTys (ProdRepr { prod_components = [] })
309 arrProdElemTys (ProdRepr { prod_components = tys })
312 arrReprTys :: Repr -> VM [[Type]]
313 arrReprTys = mapM (mapM mkPArrayType) . arrReprElemTys
315 arrReprVars :: Repr -> VM [[Var]]
317 = mapM (mapM (newLocalVar FSLIT("rs"))) =<< arrReprTys repr
319 mkRepr :: TyCon -> VM Repr
322 =<< mapM mkProduct (map dataConRepArgTys $ tyConDataCons vect_tc)
324 buildPReprType :: TyCon -> VM Type
325 buildPReprType = liftM reprType . mkRepr
327 buildToPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
328 buildToPRepr repr vect_tc prepr_tc _
330 arg <- newLocalVar FSLIT("x") arg_ty
331 result <- to_repr repr (Var arg)
334 . wrapFamInstBody prepr_tc var_tys
337 var_tys = mkTyVarTys $ tyConTyVars vect_tc
338 arg_ty = mkTyConApp vect_tc var_tys
339 res_ty = reprType repr
341 cons = tyConDataCons vect_tc
344 to_repr (SumRepr { sum_components = prods
345 , sum_tycon = tycon })
348 (vars, bodies) <- mapAndUnzipM prod_alt prods
349 return . Case expr (mkWildId (exprType expr)) res_ty
350 $ zipWith4 mk_alt cons vars (tyConDataCons tycon) bodies
352 mk_alt con vars sum_con body
353 = (DataAlt con, vars, mkConApp sum_con (ty_args ++ [body]))
355 ty_args = map (Type . reprType) prods
359 (vars, body) <- prod_alt prod
360 return $ Case expr (mkWildId (exprType expr)) res_ty
361 [(DataAlt con, vars, body)]
363 prod_alt (ProdRepr { prod_components = tys
364 , prod_data_con = data_con })
366 vars <- mapM (newLocalVar FSLIT("r")) tys
367 return (vars, mkConApp data_con (map Type tys ++ map Var vars))
369 buildFromPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
370 buildFromPRepr repr vect_tc prepr_tc _
372 arg_ty <- mkPReprType res_ty
373 arg <- newLocalVar FSLIT("x") arg_ty
377 $ unwrapFamInstScrut prepr_tc var_tys (Var arg)
379 var_tys = mkTyVarTys $ tyConTyVars vect_tc
380 res_ty = mkTyConApp vect_tc var_tys
382 cons = map (`mkConApp` map Type var_tys) (tyConDataCons vect_tc)
385 from_repr repr@(SumRepr { sum_components = prods
386 , sum_tycon = tycon })
389 vars <- mapM (newLocalVar FSLIT("x")) (map reprType prods)
390 bodies <- sequence . zipWith3 from_prod prods cons
392 return . Case expr (mkWildId (reprType repr)) res_ty
393 $ zipWith3 sum_alt (tyConDataCons tycon) vars bodies
395 sum_alt data_con var body = (DataAlt data_con, [var], body)
397 from_repr repr expr = from_prod repr con expr
399 from_prod prod@(ProdRepr { prod_components = tys
400 , prod_data_con = data_con })
404 vars <- mapM (newLocalVar FSLIT("y")) tys
405 return $ Case expr (mkWildId (reprType prod)) res_ty
406 [(DataAlt data_con, vars, con `mkVarApps` vars)]
408 buildToArrPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
409 buildToArrPRepr repr vect_tc prepr_tc arr_tc
411 arg_ty <- mkPArrayType el_ty
412 arg <- newLocalVar FSLIT("xs") arg_ty
414 res_ty <- mkPArrayType (reprType repr)
416 shape_vars <- arrShapeVars repr
417 repr_vars <- arrReprVars repr
419 parray_co <- mkBuiltinCo parrayTyCon
421 let Just repr_co = tyConFamilyCoercion_maybe prepr_tc
422 co = mkAppCoercion parray_co
424 $ mkTyConApp repr_co var_tys
426 scrut = unwrapFamInstScrut arr_tc var_tys (Var arg)
428 result <- to_repr shape_vars repr_vars repr
432 $ Case scrut (mkWildId (mkTyConApp arr_tc var_tys)) res_ty
433 [(DataAlt arr_dc, shape_vars ++ concat repr_vars, result)]
435 var_tys = mkTyVarTys $ tyConTyVars vect_tc
436 el_ty = mkTyConApp vect_tc var_tys
438 [arr_dc] = tyConDataCons arr_tc
440 to_repr shape_vars@(len_var : _)
442 (SumRepr { sum_components = prods
443 , sum_arr_tycon = tycon
444 , sum_arr_data_con = data_con })
446 exprs <- zipWithM (to_prod len_var) repr_vars prods
448 return . wrapFamInstBody tycon tys
450 $ map Type tys ++ map Var shape_vars ++ exprs
452 tys = map reprType prods
454 to_repr [len_var] [repr_vars] prod = to_prod len_var repr_vars prod
458 (ProdRepr { prod_components = tys
459 , prod_arr_tycon = tycon
460 , prod_arr_data_con = data_con })
461 = return . wrapFamInstBody tycon tys
463 $ map Type tys ++ map Var (len_var : repr_vars)
465 buildFromArrPRepr :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
466 buildFromArrPRepr repr vect_tc prepr_tc arr_tc
468 arg_ty <- mkPArrayType =<< mkPReprType el_ty
469 arg <- newLocalVar FSLIT("xs") arg_ty
471 res_ty <- mkPArrayType el_ty
473 shape_vars <- arrShapeVars repr
474 repr_vars <- arrReprVars repr
476 parray_co <- mkBuiltinCo parrayTyCon
478 let Just repr_co = tyConFamilyCoercion_maybe prepr_tc
479 co = mkAppCoercion parray_co
480 $ mkTyConApp repr_co var_tys
482 scrut = mkCoerce co (Var arg)
484 result = wrapFamInstBody arr_tc var_tys
486 $ map Type var_tys ++ map Var (shape_vars ++ concat repr_vars)
489 (from_repr repr scrut shape_vars repr_vars res_ty result)
491 var_tys = mkTyVarTys $ tyConTyVars vect_tc
492 el_ty = mkTyConApp vect_tc var_tys
494 [arr_dc] = tyConDataCons arr_tc
496 from_repr (SumRepr { sum_components = prods
497 , sum_arr_tycon = tycon
498 , sum_arr_data_con = data_con })
505 vars <- mapM (newLocalVar FSLIT("xs")) =<< mapM arrReprType prods
506 result <- go prods repr_vars vars body
508 let scrut = unwrapFamInstScrut tycon ty_args expr
509 return . Case scrut (mkWildId scrut_ty) res_ty
510 $ [(DataAlt data_con, shape_vars ++ vars, result)]
512 ty_args = map reprType prods
513 scrut_ty = mkTyConApp tycon ty_args
515 go [] [] [] body = return body
516 go (prod : prods) (repr_vars : rss) (var : vars) body
518 shape_vars <- mapM (newLocalVar FSLIT("s")) =<< arrShapeTys prod
520 from_prod prod (Var var) shape_vars repr_vars res_ty
521 =<< go prods rss vars body
523 from_repr repr expr shape_vars [repr_vars] res_ty body
524 = from_prod repr expr shape_vars repr_vars res_ty body
526 from_prod prod@(ProdRepr { prod_components = tys
527 , prod_arr_tycon = tycon
528 , prod_arr_data_con = data_con })
535 let scrut = unwrapFamInstScrut tycon tys expr
536 scrut_ty = mkTyConApp tycon tys
537 ty <- arrReprType prod
539 return $ Case scrut (mkWildId scrut_ty) res_ty
540 [(DataAlt data_con, shape_vars ++ repr_vars, body)]
542 buildPRDictRepr :: Repr -> VM CoreExpr
543 buildPRDictRepr (ProdRepr {
544 prod_components = tys
549 dfun <- prDFunOfTyCon tycon
550 return $ dfun `mkTyApps` tys `mkApps` prs
552 buildPRDictRepr (SumRepr {
553 sum_components = prods
554 , sum_tycon = tycon })
556 prs <- mapM buildPRDictRepr prods
557 dfun <- prDFunOfTyCon tycon
558 return $ dfun `mkTyApps` map reprType prods `mkApps` prs
560 buildPRDict :: Repr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
561 buildPRDict repr vect_tc prepr_tc _
563 dict <- buildPRDictRepr repr
565 pr_co <- mkBuiltinCo prTyCon
566 let co = mkAppCoercion pr_co
568 $ mkTyConApp arg_co var_tys
570 return $ mkCoerce co dict
572 var_tys = mkTyVarTys $ tyConTyVars vect_tc
574 Just arg_co = tyConFamilyCoercion_maybe prepr_tc
576 buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
577 buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
579 name' <- cloneName mkPArrayTyConOcc orig_name
580 rhs <- buildPArrayTyConRhs orig_name vect_tc repr_tc
581 parray <- builtin parrayTyCon
583 liftDs $ buildAlgTyCon name'
585 [] -- no stupid theta
587 rec_flag -- FIXME: is this ok?
588 False -- FIXME: no generics
589 False -- not GADT syntax
590 (Just $ mk_fam_inst parray vect_tc)
592 orig_name = tyConName orig_tc
593 tyvars = tyConTyVars vect_tc
594 rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
597 buildPArrayTyConRhs :: Name -> TyCon -> TyCon -> VM AlgTyConRhs
598 buildPArrayTyConRhs orig_name vect_tc repr_tc
600 data_con <- buildPArrayDataCon orig_name vect_tc repr_tc
601 return $ DataTyCon { data_cons = [data_con], is_enum = False }
603 buildPArrayDataCon :: Name -> TyCon -> TyCon -> VM DataCon
604 buildPArrayDataCon orig_name vect_tc repr_tc
606 dc_name <- cloneName mkPArrayDataConOcc orig_name
607 repr <- mkRepr vect_tc
609 shape_tys <- arrShapeTys repr
610 repr_tys <- arrReprTys repr
612 let tys = shape_tys ++ concat repr_tys
614 liftDs $ buildDataCon dc_name
616 (map (const NotMarkedStrict) tys)
617 [] -- no field labels
618 (tyConTyVars vect_tc)
619 [] -- no existentials
625 mkPADFun :: TyCon -> VM Var
627 = newExportedVar (mkPADFunOcc $ getOccName vect_tc) =<< paDFunType vect_tc
629 buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> Var
630 -> VM [(Var, CoreExpr)]
631 buildTyConBindings orig_tc vect_tc prepr_tc arr_tc dfun
633 repr <- mkRepr vect_tc
634 vectDataConWorkers repr orig_tc vect_tc arr_tc
635 dict <- buildPADict repr vect_tc prepr_tc arr_tc dfun
637 return $ (dfun, dict) : binds
639 orig_dcs = tyConDataCons orig_tc
640 vect_dcs = tyConDataCons vect_tc
641 [arr_dc] = tyConDataCons arr_tc
643 repr_tys = map dataConRepArgTys vect_dcs
645 vectDataConWorkers :: Repr -> TyCon -> TyCon -> TyCon
647 vectDataConWorkers repr orig_tc vect_tc arr_tc
650 . zipWith3 def_worker (tyConDataCons orig_tc) rep_tys
651 $ zipWith4 mk_data_con (tyConDataCons vect_tc)
654 (tail $ tails arr_tys)
655 mapM_ (uncurry hoistBinding) bs
657 tyvars = tyConTyVars vect_tc
658 var_tys = mkTyVarTys tyvars
659 ty_args = map Type var_tys
661 res_ty = mkTyConApp vect_tc var_tys
663 rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
664 arr_tys = arrReprElemTys repr
666 [arr_dc] = tyConDataCons arr_tc
668 mk_data_con con tys pre post
669 = liftM2 (,) (vect_data_con con)
670 (lift_data_con tys (concat pre)
674 vect_data_con con = return $ mkConApp con ty_args
675 lift_data_con tys pre_tys post_tys tag
677 len <- builtin liftingContext
678 args <- mapM (newLocalVar FSLIT("xs"))
679 =<< mapM mkPArrayType tys
681 shape <- replicateShape repr (Var len) tag
682 repr <- mk_arr_repr (Var len) (map Var args)
684 pre <- mapM emptyPA pre_tys
685 post <- mapM emptyPA post_tys
687 return . mkLams (len : args)
688 . wrapFamInstBody arr_tc var_tys
690 $ ty_args ++ shape ++ pre ++ repr ++ post
694 units <- replicatePA len (Var unitDataConId)
697 mk_arr_repr len arrs = return arrs
699 def_worker data_con arg_tys mk_body
703 . polyAbstract tyvars $ \abstract ->
704 liftM (abstract . vectorised)
705 $ buildClosures tyvars [] arg_tys res_ty mk_body
707 vect_worker <- cloneId mkVectOcc orig_worker (exprType body)
708 defGlobalVar orig_worker vect_worker
709 return (vect_worker, body)
711 orig_worker = dataConWorkId data_con
713 buildPADict :: Repr -> TyCon -> TyCon -> TyCon -> Var -> VM CoreExpr
714 buildPADict repr vect_tc prepr_tc arr_tc dfun
715 = polyAbstract tvs $ \abstract ->
717 meth_binds <- mapM (mk_method repr) paMethods
718 let meth_exprs = map (Var . fst) meth_binds
720 pa_dc <- builtin paDataCon
721 let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
722 body = Let (Rec meth_binds) dict
723 return . mkInlineMe $ abstract body
725 tvs = tyConTyVars arr_tc
726 arg_tys = mkTyVarTys tvs
728 mk_method repr (name, build)
731 body <- build repr vect_tc prepr_tc arr_tc
732 var <- newLocalVar name (exprType body)
733 return (var, mkInlineMe body)
735 paMethods = [(FSLIT("toPRepr"), buildToPRepr),
736 (FSLIT("fromPRepr"), buildFromPRepr),
737 (FSLIT("toArrPRepr"), buildToArrPRepr),
738 (FSLIT("fromArrPRepr"), buildFromArrPRepr),
739 (FSLIT("dictPRepr"), buildPRDict)]
741 -- | Split the given tycons into two sets depending on whether they have to be
742 -- converted (first list) or not (second list). The first argument contains
743 -- information about the conversion status of external tycons:
745 -- * tycons which have converted versions are mapped to True
746 -- * tycons which are not changed by vectorisation are mapped to False
747 -- * tycons which can't be converted are not elements of the map
749 classifyTyCons :: UniqFM Bool -> [TyConGroup] -> ([TyCon], [TyCon])
750 classifyTyCons = classify [] []
752 classify conv keep cs [] = (conv, keep)
753 classify conv keep cs ((tcs, ds) : rs)
754 | can_convert && must_convert
755 = classify (tcs ++ conv) keep (cs `addListToUFM` [(tc,True) | tc <- tcs]) rs
757 = classify conv (tcs ++ keep) (cs `addListToUFM` [(tc,False) | tc <- tcs]) rs
759 = classify conv keep cs rs
761 refs = ds `delListFromUniqSet` tcs
763 can_convert = isNullUFM (refs `minusUFM` cs) && all convertable tcs
764 must_convert = foldUFM (||) False (intersectUFM_C const cs refs)
766 convertable tc = isDataTyCon tc && all isVanillaDataCon (tyConDataCons tc)
768 -- | Compute mutually recursive groups of tycons in topological order
770 tyConGroups :: [TyCon] -> [TyConGroup]
771 tyConGroups tcs = map mk_grp (stronglyConnComp edges)
773 edges = [((tc, ds), tc, uniqSetToList ds) | tc <- tcs
774 , let ds = tyConsOfTyCon tc]
776 mk_grp (AcyclicSCC (tc, ds)) = ([tc], ds)
777 mk_grp (CyclicSCC els) = (tcs, unionManyUniqSets dss)
779 (tcs, dss) = unzip els
781 tyConsOfTyCon :: TyCon -> UniqSet TyCon
783 = tyConsOfTypes . concatMap dataConRepArgTys . tyConDataCons
785 tyConsOfType :: Type -> UniqSet TyCon
787 | Just ty' <- coreView ty = tyConsOfType ty'
788 tyConsOfType (TyVarTy v) = emptyUniqSet
789 tyConsOfType (TyConApp tc tys) = extend (tyConsOfTypes tys)
791 extend | isUnLiftedTyCon tc
792 || isTupleTyCon tc = id
794 | otherwise = (`addOneToUniqSet` tc)
796 tyConsOfType (AppTy a b) = tyConsOfType a `unionUniqSets` tyConsOfType b
797 tyConsOfType (FunTy a b) = (tyConsOfType a `unionUniqSets` tyConsOfType b)
798 `addOneToUniqSet` funTyCon
799 tyConsOfType (ForAllTy _ ty) = tyConsOfType ty
800 tyConsOfType other = pprPanic "ClosureConv.tyConsOfType" $ ppr other
802 tyConsOfTypes :: [Type] -> UniqSet TyCon
803 tyConsOfTypes = unionManyUniqSets . map tyConsOfType