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, intTy, intDataCon, unitDataConId )
30 import TysPrim ( intPrimTy )
35 import Digraph ( SCC(..), stronglyConnComp )
39 import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_ )
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
211 buildPReprType :: TyCon -> VM Type
212 buildPReprType = liftM repr_type . mkTyConRepr
214 buildToPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
215 buildToPRepr (TyConRepr {
217 , repr_prod_tycons = prod_tycons
218 , repr_prod_tys = prod_tys
219 , repr_sum_tycon = repr_sum_tycon
220 , repr_type = repr_type
224 arg <- newLocalVar FSLIT("x") arg_ty
225 vars <- mapM (mapM (newLocalVar FSLIT("x"))) repr_tys
228 . wrapFamInstBody prepr_tc var_tys
229 . Case (Var arg) (mkWildId arg_ty) repr_type
230 . mk_alts data_cons vars
231 . zipWith3 mk_prod prod_tycons repr_tys $ map (map Var) vars
233 var_tys = mkTyVarTys $ tyConTyVars vect_tc
234 arg_ty = mkTyConApp vect_tc var_tys
235 data_cons = tyConDataCons vect_tc
237 Just sum_tycon = repr_sum_tycon
238 sum_datacons = tyConDataCons sum_tycon
240 mk_alts _ _ [] = [(DEFAULT, [], Var unitDataConId)]
241 mk_alts [dc] [vars] [expr] = [(DataAlt dc, vars, expr)]
242 mk_alts dcs vars exprs = zipWith4 mk_alt dcs vars sum_datacons exprs
244 mk_alt dc vars sum_dc expr = (DataAlt dc, vars,
245 mkConApp sum_dc (map Type prod_tys ++ [expr]))
247 mk_prod _ _ [] = Var unitDataConId
248 mk_prod _ _ [expr] = expr
249 mk_prod (Just tc) tys exprs = mkConApp dc (map Type tys ++ exprs)
251 [dc] = tyConDataCons tc
253 buildFromPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
254 buildFromPRepr _ vect_tc prepr_tc _
256 arg_ty <- mkPReprType res_ty
257 arg <- newLocalVar FSLIT("x") arg_ty
258 alts <- mapM mk_alt data_cons
259 body <- mkFromPRepr (unwrapFamInstScrut prepr_tc var_tys (Var arg))
261 return $ Lam arg body
263 var_tys = mkTyVarTys $ tyConTyVars vect_tc
264 res_ty = mkTyConApp vect_tc var_tys
265 data_cons = tyConDataCons vect_tc
268 bndrs <- mapM (newLocalVar FSLIT("x")) $ dataConRepArgTys dc
269 return (bndrs, mkConApp dc (map Type var_tys ++ map Var bndrs))
271 buildToArrPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
272 buildToArrPRepr _ vect_tc prepr_tc arr_tc
274 arg_ty <- mkPArrayType el_ty
275 rep_tys <- mapM (mapM mkPArrayType) rep_el_tys
277 arg <- newLocalVar FSLIT("xs") arg_ty
278 bndrss <- mapM (mapM (newLocalVar FSLIT("ys"))) rep_tys
279 len <- newLocalVar FSLIT("len") intPrimTy
280 sel <- newLocalVar FSLIT("sel") =<< mkPArrayType intTy
282 let add_sel xs | has_selector = sel : xs
285 all_bndrs = len : add_sel (concat bndrss)
287 res <- parrayCoerce prepr_tc var_tys
288 =<< mkToArrPRepr (Var len) (Var sel) (map (map Var) bndrss)
289 res_ty <- mkPArrayType =<< mkPReprType el_ty
292 $ Case (unwrapFamInstScrut arr_tc var_tys (Var arg))
293 (mkWildId (mkTyConApp arr_tc var_tys))
295 [(DataAlt arr_dc, all_bndrs, res)]
297 var_tys = mkTyVarTys $ tyConTyVars vect_tc
298 el_ty = mkTyConApp vect_tc var_tys
299 data_cons = tyConDataCons vect_tc
300 rep_el_tys = map dataConRepArgTys data_cons
302 [arr_dc] = tyConDataCons arr_tc
304 has_selector | [_] <- data_cons = False
307 buildFromArrPRepr :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
308 buildFromArrPRepr _ vect_tc prepr_tc arr_tc
309 = mkFromArrPRepr undefined undefined undefined undefined undefined undefined
311 buildPRDict :: TyConRepr -> TyCon -> TyCon -> TyCon -> VM CoreExpr
312 buildPRDict _ vect_tc prepr_tc _
313 = prCoerce prepr_tc var_tys
314 =<< prDictOfType (mkTyConApp prepr_tc var_tys)
316 var_tys = mkTyVarTys $ tyConTyVars vect_tc
318 buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
319 buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
321 name' <- cloneName mkPArrayTyConOcc orig_name
322 rhs <- buildPArrayTyConRhs orig_name vect_tc repr_tc
323 parray <- builtin parrayTyCon
325 liftDs $ buildAlgTyCon name'
327 [] -- no stupid theta
329 rec_flag -- FIXME: is this ok?
330 False -- FIXME: no generics
331 False -- not GADT syntax
332 (Just $ mk_fam_inst parray vect_tc)
334 orig_name = tyConName orig_tc
335 tyvars = tyConTyVars vect_tc
336 rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
339 buildPArrayTyConRhs :: Name -> TyCon -> TyCon -> VM AlgTyConRhs
340 buildPArrayTyConRhs orig_name vect_tc repr_tc
342 data_con <- buildPArrayDataCon orig_name vect_tc repr_tc
343 return $ DataTyCon { data_cons = [data_con], is_enum = False }
345 buildPArrayDataCon :: Name -> TyCon -> TyCon -> VM DataCon
346 buildPArrayDataCon orig_name vect_tc repr_tc
348 dc_name <- cloneName mkPArrayDataConOcc orig_name
349 shape <- tyConShape vect_tc
350 repr_tys <- mapM mkPArrayType types
352 liftDs $ buildDataCon dc_name
354 (shapeStrictness shape ++ map (const NotMarkedStrict) repr_tys)
355 [] -- no field labels
356 (tyConTyVars vect_tc)
357 [] -- no existentials
360 (shapeReprTys shape ++ repr_tys)
363 types = [ty | dc <- tyConDataCons vect_tc
364 , ty <- dataConRepArgTys dc]
366 mkPADFun :: TyCon -> VM Var
368 = newExportedVar (mkPADFunOcc $ getOccName vect_tc) =<< paDFunType vect_tc
371 shapeReprTys :: [Type]
372 , shapeStrictness :: [StrictnessMark]
373 , shapeLength :: [CoreExpr] -> VM CoreExpr
374 , shapeReplicate :: CoreExpr -> CoreExpr -> VM [CoreExpr]
377 tyConShape :: TyCon -> VM Shape
379 | isProductTyCon vect_tc
381 shapeReprTys = [intPrimTy]
382 , shapeStrictness = [NotMarkedStrict]
383 , shapeLength = \[len] -> return len
384 , shapeReplicate = \len _ -> return [len]
389 repr_ty <- mkPArrayType intTy -- FIXME: we want to unbox this
391 shapeReprTys = [repr_ty]
392 , shapeStrictness = [MarkedStrict]
393 , shapeLength = \[sel] -> lengthPA sel
394 , shapeReplicate = \len n -> do
395 e <- replicatePA len n
399 buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> Var
400 -> VM [(Var, CoreExpr)]
401 buildTyConBindings orig_tc vect_tc prepr_tc arr_tc dfun
403 shape <- tyConShape vect_tc
404 repr <- mkTyConRepr vect_tc
405 sequence_ (zipWith4 (vectDataConWorker shape vect_tc arr_tc arr_dc)
410 dict <- buildPADict repr vect_tc prepr_tc arr_tc dfun
412 return $ (dfun, dict) : binds
414 orig_dcs = tyConDataCons orig_tc
415 vect_dcs = tyConDataCons vect_tc
416 [arr_dc] = tyConDataCons arr_tc
418 repr_tys = map dataConRepArgTys vect_dcs
420 vectDataConWorker :: Shape -> TyCon -> TyCon -> DataCon
421 -> DataCon -> DataCon -> [[Type]] -> [[Type]]
423 vectDataConWorker shape vect_tc arr_tc arr_dc orig_dc vect_dc pre (dc_tys : post)
427 . polyAbstract tvs $ \abstract ->
428 liftM (abstract . vectorised)
429 $ buildClosures tvs [] dc_tys res_ty (liftM2 (,) mk_vect mk_lift)
431 worker <- cloneId mkVectOcc orig_worker (exprType clo)
432 hoistBinding worker clo
433 defGlobalVar orig_worker worker
436 tvs = tyConTyVars vect_tc
437 arg_tys = mkTyVarTys tvs
438 res_ty = mkTyConApp vect_tc arg_tys
440 orig_worker = dataConWorkId orig_dc
442 mk_vect = return . mkConApp vect_dc $ map Type arg_tys
444 len <- newLocalVar FSLIT("n") intPrimTy
445 arr_tys <- mapM mkPArrayType dc_tys
446 args <- mapM (newLocalVar FSLIT("xs")) arr_tys
447 shapes <- shapeReplicate shape
449 (mkDataConTag vect_dc)
451 empty_pre <- mapM emptyPA (concat pre)
452 empty_post <- mapM emptyPA (concat post)
454 return . mkLams (len : args)
455 . wrapFamInstBody arr_tc arg_tys
457 $ map Type arg_tys ++ shapes
462 buildPADict :: TyConRepr -> TyCon -> TyCon -> TyCon -> Var -> VM CoreExpr
463 buildPADict repr vect_tc prepr_tc arr_tc dfun
464 = polyAbstract tvs $ \abstract ->
466 meth_binds <- mapM (mk_method repr) paMethods
467 let meth_exprs = map (Var . fst) meth_binds
469 pa_dc <- builtin paDataCon
470 let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
471 body = Let (Rec meth_binds) dict
472 return . mkInlineMe $ abstract body
474 tvs = tyConTyVars arr_tc
475 arg_tys = mkTyVarTys tvs
477 mk_method repr (name, build)
480 body <- build repr vect_tc prepr_tc arr_tc
481 var <- newLocalVar name (exprType body)
482 return (var, mkInlineMe body)
484 paMethods = [(FSLIT("toPRepr"), buildToPRepr),
485 (FSLIT("fromPRepr"), buildFromPRepr),
486 (FSLIT("toArrPRepr"), buildToArrPRepr),
487 (FSLIT("fromArrPRepr"), buildFromArrPRepr),
488 (FSLIT("dictPRepr"), buildPRDict)]
490 -- | Split the given tycons into two sets depending on whether they have to be
491 -- converted (first list) or not (second list). The first argument contains
492 -- information about the conversion status of external tycons:
494 -- * tycons which have converted versions are mapped to True
495 -- * tycons which are not changed by vectorisation are mapped to False
496 -- * tycons which can't be converted are not elements of the map
498 classifyTyCons :: UniqFM Bool -> [TyConGroup] -> ([TyCon], [TyCon])
499 classifyTyCons = classify [] []
501 classify conv keep cs [] = (conv, keep)
502 classify conv keep cs ((tcs, ds) : rs)
503 | can_convert && must_convert
504 = classify (tcs ++ conv) keep (cs `addListToUFM` [(tc,True) | tc <- tcs]) rs
506 = classify conv (tcs ++ keep) (cs `addListToUFM` [(tc,False) | tc <- tcs]) rs
508 = classify conv keep cs rs
510 refs = ds `delListFromUniqSet` tcs
512 can_convert = isNullUFM (refs `minusUFM` cs) && all convertable tcs
513 must_convert = foldUFM (||) False (intersectUFM_C const cs refs)
515 convertable tc = isDataTyCon tc && all isVanillaDataCon (tyConDataCons tc)
517 -- | Compute mutually recursive groups of tycons in topological order
519 tyConGroups :: [TyCon] -> [TyConGroup]
520 tyConGroups tcs = map mk_grp (stronglyConnComp edges)
522 edges = [((tc, ds), tc, uniqSetToList ds) | tc <- tcs
523 , let ds = tyConsOfTyCon tc]
525 mk_grp (AcyclicSCC (tc, ds)) = ([tc], ds)
526 mk_grp (CyclicSCC els) = (tcs, unionManyUniqSets dss)
528 (tcs, dss) = unzip els
530 tyConsOfTyCon :: TyCon -> UniqSet TyCon
532 = tyConsOfTypes . concatMap dataConRepArgTys . tyConDataCons
534 tyConsOfType :: Type -> UniqSet TyCon
536 | Just ty' <- coreView ty = tyConsOfType ty'
537 tyConsOfType (TyVarTy v) = emptyUniqSet
538 tyConsOfType (TyConApp tc tys) = extend (tyConsOfTypes tys)
540 extend | isUnLiftedTyCon tc
541 || isTupleTyCon tc = id
543 | otherwise = (`addOneToUniqSet` tc)
545 tyConsOfType (AppTy a b) = tyConsOfType a `unionUniqSets` tyConsOfType b
546 tyConsOfType (FunTy a b) = (tyConsOfType a `unionUniqSets` tyConsOfType b)
547 `addOneToUniqSet` funTyCon
548 tyConsOfType (ForAllTy _ ty) = tyConsOfType ty
549 tyConsOfType other = pprPanic "ClosureConv.tyConsOfType" $ ppr other
551 tyConsOfTypes :: [Type] -> UniqSet TyCon
552 tyConsOfTypes = unionManyUniqSets . map tyConsOfType