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 ( intTy, intDataCon )
30 import TysPrim ( intPrimTy )
35 import Digraph ( SCC(..), stronglyConnComp )
39 import Control.Monad ( liftM, liftM2, zipWithM, zipWithM_ )
40 import Data.List ( inits, tails, zipWith4 )
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 parr_tcs <- zipWithM buildPArrayTyCon orig_tcs vect_tcs
101 dfuns <- mapM mkPADFun vect_tcs
102 defTyConPAs (zip vect_tcs dfuns)
103 binds <- sequence (zipWith4 buildTyConBindings orig_tcs vect_tcs parr_tcs dfuns)
105 let all_new_tcs = new_tcs ++ parr_tcs
107 let new_env = extendTypeEnvList env
108 (map ATyCon all_new_tcs
109 ++ [ADataCon dc | tc <- all_new_tcs
110 , dc <- tyConDataCons tc])
112 return (new_env, map mkLocalFamInst parr_tcs, concat binds)
114 tycons = typeEnvTyCons env
115 groups = tyConGroups tycons
117 mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env]
119 keep_tc tc = let dcs = tyConDataCons tc
121 defTyCon tc tc >> zipWithM_ defDataCon dcs dcs
124 vectTyConDecls :: [TyCon] -> VM [TyCon]
125 vectTyConDecls tcs = fixV $ \tcs' ->
127 mapM_ (uncurry defTyCon) (lazy_zip tcs tcs')
128 mapM vectTyConDecl tcs
131 lazy_zip (x:xs) ~(y:ys) = (x,y) : lazy_zip xs ys
133 vectTyConDecl :: TyCon -> VM TyCon
136 name' <- cloneName mkVectTyConOcc name
137 rhs' <- vectAlgTyConRhs (algTyConRhs tc)
139 liftDs $ buildAlgTyCon name'
141 [] -- no stupid theta
143 rec_flag -- FIXME: is this ok?
144 False -- FIXME: no generics
145 False -- not GADT syntax
146 Nothing -- not a family instance
149 tyvars = tyConTyVars tc
150 rec_flag = boolToRecFlag (isRecursiveTyCon tc)
152 vectAlgTyConRhs :: AlgTyConRhs -> VM AlgTyConRhs
153 vectAlgTyConRhs (DataTyCon { data_cons = data_cons
157 data_cons' <- mapM vectDataCon data_cons
158 zipWithM_ defDataCon data_cons data_cons'
159 return $ DataTyCon { data_cons = data_cons'
163 vectDataCon :: DataCon -> VM DataCon
165 | not . null $ dataConExTyVars dc = pprPanic "vectDataCon: existentials" (ppr dc)
166 | not . null $ dataConEqSpec dc = pprPanic "vectDataCon: eq spec" (ppr dc)
169 name' <- cloneName mkVectDataConOcc name
170 tycon' <- vectTyCon tycon
171 arg_tys <- mapM vectType rep_arg_tys
173 liftDs $ buildDataCon name'
175 (map (const NotMarkedStrict) arg_tys)
176 [] -- no labelled fields
178 [] -- no existential tvs for now
179 [] -- no eq spec for now
184 name = dataConName dc
185 univ_tvs = dataConUnivTyVars dc
186 rep_arg_tys = dataConRepArgTys dc
187 tycon = dataConTyCon dc
189 buildPArrayTyCon :: TyCon -> TyCon -> VM TyCon
190 buildPArrayTyCon orig_tc vect_tc = fixV $ \repr_tc ->
192 name' <- cloneName mkPArrayTyConOcc orig_name
193 rhs <- buildPArrayTyConRhs orig_name vect_tc repr_tc
194 parray <- builtin parrayTyCon
196 liftDs $ buildAlgTyCon name'
198 [] -- no stupid theta
200 rec_flag -- FIXME: is this ok?
201 False -- FIXME: no generics
202 False -- not GADT syntax
203 (Just (parray, [mkTyConApp vect_tc (map mkTyVarTy tyvars)]))
205 orig_name = tyConName orig_tc
206 tyvars = tyConTyVars vect_tc
207 rec_flag = boolToRecFlag (isRecursiveTyCon vect_tc)
210 buildPArrayTyConRhs :: Name -> TyCon -> TyCon -> VM AlgTyConRhs
211 buildPArrayTyConRhs orig_name vect_tc repr_tc
213 data_con <- buildPArrayDataCon orig_name vect_tc repr_tc
214 return $ DataTyCon { data_cons = [data_con], is_enum = False }
216 buildPArrayDataCon :: Name -> TyCon -> TyCon -> VM DataCon
217 buildPArrayDataCon orig_name vect_tc repr_tc
219 dc_name <- cloneName mkPArrayDataConOcc orig_name
220 shape <- tyConShape vect_tc
221 repr_tys <- mapM mkPArrayType types
223 liftDs $ buildDataCon dc_name
225 (shapeStrictness shape ++ map (const NotMarkedStrict) repr_tys)
226 [] -- no field labels
227 (tyConTyVars vect_tc)
228 [] -- no existentials
231 (shapeReprTys shape ++ repr_tys)
234 types = [ty | dc <- tyConDataCons vect_tc
235 , ty <- dataConRepArgTys dc]
237 mkPADFun :: TyCon -> VM Var
239 = newExportedVar (mkPADFunOcc $ getOccName vect_tc) =<< paDFunType vect_tc
242 shapeReprTys :: [Type]
243 , shapeStrictness :: [StrictnessMark]
244 , shapeLength :: [CoreExpr] -> VM CoreExpr
245 , shapeReplicate :: CoreExpr -> CoreExpr -> VM [CoreExpr]
248 tyConShape :: TyCon -> VM Shape
250 | isProductTyCon vect_tc
252 shapeReprTys = [intPrimTy]
253 , shapeStrictness = [NotMarkedStrict]
254 , shapeLength = \[len] -> return len
255 , shapeReplicate = \len _ -> return [len]
260 repr_ty <- mkPArrayType intTy -- FIXME: we want to unbox this
262 shapeReprTys = [repr_ty]
263 , shapeStrictness = [MarkedStrict]
264 , shapeLength = \[sel] -> lengthPA sel
265 , shapeReplicate = \len n -> do
266 e <- replicatePA len n
270 buildTyConBindings :: TyCon -> TyCon -> TyCon -> Var -> VM [(Var, CoreExpr)]
271 buildTyConBindings orig_tc vect_tc arr_tc dfun
273 shape <- tyConShape vect_tc
274 sequence_ (zipWith4 (vectDataConWorker shape vect_tc arr_tc arr_dc)
279 dict <- buildPADict shape vect_tc arr_tc dfun
281 return $ (dfun, dict) : binds
283 orig_dcs = tyConDataCons orig_tc
284 vect_dcs = tyConDataCons vect_tc
285 [arr_dc] = tyConDataCons arr_tc
287 repr_tys = map dataConRepArgTys vect_dcs
289 vectDataConWorker :: Shape -> TyCon -> TyCon -> DataCon
290 -> DataCon -> DataCon -> [[Type]] -> [[Type]]
292 vectDataConWorker shape vect_tc arr_tc arr_dc orig_dc vect_dc pre (dc_tys : post)
296 . polyAbstract tvs $ \abstract ->
297 liftM (abstract . vectorised)
298 $ buildClosures tvs [] dc_tys res_ty (liftM2 (,) mk_vect mk_lift)
300 worker <- cloneId mkVectOcc orig_worker (exprType clo)
301 hoistBinding worker clo
302 defGlobalVar orig_worker worker
305 tvs = tyConTyVars vect_tc
306 arg_tys = mkTyVarTys tvs
307 res_ty = mkTyConApp vect_tc arg_tys
309 orig_worker = dataConWorkId orig_dc
311 mk_vect = return . mkConApp vect_dc $ map Type arg_tys
313 len <- newLocalVar FSLIT("n") intPrimTy
314 arr_tys <- mapM mkPArrayType dc_tys
315 args <- mapM (newLocalVar FSLIT("xs")) arr_tys
316 shapes <- shapeReplicate shape
318 (mkDataConTag vect_dc)
320 empty_pre <- mapM emptyPA (concat pre)
321 empty_post <- mapM emptyPA (concat post)
323 return . mkLams (len : args)
324 . wrapFamInstBody arr_tc arg_tys
326 $ map Type arg_tys ++ shapes
331 buildPADict :: Shape -> TyCon -> TyCon -> Var -> VM CoreExpr
332 buildPADict shape vect_tc arr_tc dfun
333 = polyAbstract tvs $ \abstract ->
335 meth_binds <- mapM (mk_method shape) paMethods
336 let meth_exprs = map (Var . fst) meth_binds
338 pa_dc <- builtin paDataCon
339 let dict = mkConApp pa_dc (Type (mkTyConApp vect_tc arg_tys) : meth_exprs)
340 body = Let (Rec meth_binds) dict
341 return . mkInlineMe $ abstract body
343 tvs = tyConTyVars arr_tc
344 arg_tys = mkTyVarTys tvs
346 mk_method shape (name, build)
349 body <- build shape vect_tc arr_tc
350 var <- newLocalVar name (exprType body)
351 return (var, mkInlineMe body)
353 paMethods = [(FSLIT("lengthPA"), buildLengthPA),
354 (FSLIT("replicatePA"), buildReplicatePA)]
356 buildLengthPA :: Shape -> TyCon -> TyCon -> VM CoreExpr
357 buildLengthPA shape vect_tc arr_tc
359 parr_ty <- mkPArrayType (mkTyConApp vect_tc arg_tys)
360 arg <- newLocalVar FSLIT("xs") parr_ty
361 shapes <- mapM (newLocalVar FSLIT("sh")) shape_tys
362 wilds <- mapM newDummyVar repr_tys
363 let scrut = unwrapFamInstScrut arr_tc arg_tys (Var arg)
364 scrut_ty = exprType scrut
366 body <- shapeLength shape (map Var shapes)
369 $ Case scrut (mkWildId scrut_ty) intPrimTy
370 [(DataAlt repr_dc, shapes ++ wilds, body)]
372 arg_tys = mkTyVarTys $ tyConTyVars arr_tc
373 [repr_dc] = tyConDataCons arr_tc
375 shape_tys = shapeReprTys shape
376 repr_tys = drop (length shape_tys) (dataConRepArgTys repr_dc)
378 -- data T = C0 t1 ... tm
382 -- data [:T:] = A ![:Int:] [:t1:] ... [:un:]
384 -- replicatePA :: Int# -> T -> [:T:]
386 -- = let c = case t of
392 -- C0 x1 _ ... _ -> replicatePA @t1 n# x1
398 -- Ck _ ... _ yn -> replicatePA @un n# yn
401 -- A (replicatePA @Int n# c) xs1 ... ysn
405 buildReplicatePA :: Shape -> TyCon -> TyCon -> VM CoreExpr
406 buildReplicatePA shape vect_tc arr_tc
408 len_var <- newLocalVar FSLIT("n") intPrimTy
409 val_var <- newLocalVar FSLIT("x") val_ty
411 let len = Var len_var
414 shape_reprs <- shapeReplicate shape len (ctr_num val)
415 reprs <- liftM concat $ mapM (mk_comp_arrs len val) vect_dcs
417 return . mkLams [len_var, val_var]
418 . wrapFamInstBody arr_tc arg_tys
419 $ mkConApp arr_dc (map Type arg_tys ++ shape_reprs ++ reprs)
421 arg_tys = mkTyVarTys (tyConTyVars arr_tc)
422 val_ty = mkTyConApp vect_tc arg_tys
423 wild = mkWildId val_ty
424 vect_dcs = tyConDataCons vect_tc
425 [arr_dc] = tyConDataCons arr_tc
427 ctr_num val = Case val wild intTy (zipWith ctr_num_alt vect_dcs [0..])
428 ctr_num_alt dc i = (DataAlt dc, map mkWildId (dataConRepArgTys dc),
429 mkConApp intDataCon [mkIntLitInt i])
432 mk_comp_arrs len val dc = let tys = dataConRepArgTys dc
433 wilds = map mkWildId tys
435 sequence (zipWith3 (mk_comp_arr len val dc)
436 tys (inits wilds) (tails wilds))
438 mk_comp_arr len val dc ty pre (_:post)
440 var <- newLocalVar FSLIT("x") ty
441 rep <- replicatePA len (Var var)
443 arr_ty <- mkPArrayType ty
445 return $ Case val wild arr_ty
446 [(DEFAULT, [], empty), (DataAlt dc, pre ++ (var : post), rep)]
448 -- | Split the given tycons into two sets depending on whether they have to be
449 -- converted (first list) or not (second list). The first argument contains
450 -- information about the conversion status of external tycons:
452 -- * tycons which have converted versions are mapped to True
453 -- * tycons which are not changed by vectorisation are mapped to False
454 -- * tycons which can't be converted are not elements of the map
456 classifyTyCons :: UniqFM Bool -> [TyConGroup] -> ([TyCon], [TyCon])
457 classifyTyCons = classify [] []
459 classify conv keep cs [] = (conv, keep)
460 classify conv keep cs ((tcs, ds) : rs)
461 | can_convert && must_convert
462 = classify (tcs ++ conv) keep (cs `addListToUFM` [(tc,True) | tc <- tcs]) rs
464 = classify conv (tcs ++ keep) (cs `addListToUFM` [(tc,False) | tc <- tcs]) rs
466 = classify conv keep cs rs
468 refs = ds `delListFromUniqSet` tcs
470 can_convert = isNullUFM (refs `minusUFM` cs) && all convertable tcs
471 must_convert = foldUFM (||) False (intersectUFM_C const cs refs)
473 convertable tc = isDataTyCon tc && all isVanillaDataCon (tyConDataCons tc)
475 -- | Compute mutually recursive groups of tycons in topological order
477 tyConGroups :: [TyCon] -> [TyConGroup]
478 tyConGroups tcs = map mk_grp (stronglyConnComp edges)
480 edges = [((tc, ds), tc, uniqSetToList ds) | tc <- tcs
481 , let ds = tyConsOfTyCon tc]
483 mk_grp (AcyclicSCC (tc, ds)) = ([tc], ds)
484 mk_grp (CyclicSCC els) = (tcs, unionManyUniqSets dss)
486 (tcs, dss) = unzip els
488 tyConsOfTyCon :: TyCon -> UniqSet TyCon
490 = tyConsOfTypes . concatMap dataConRepArgTys . tyConDataCons
492 tyConsOfType :: Type -> UniqSet TyCon
494 | Just ty' <- coreView ty = tyConsOfType ty'
495 tyConsOfType (TyVarTy v) = emptyUniqSet
496 tyConsOfType (TyConApp tc tys) = extend (tyConsOfTypes tys)
498 extend | isUnLiftedTyCon tc
499 || isTupleTyCon tc = id
501 | otherwise = (`addOneToUniqSet` tc)
503 tyConsOfType (AppTy a b) = tyConsOfType a `unionUniqSets` tyConsOfType b
504 tyConsOfType (FunTy a b) = (tyConsOfType a `unionUniqSets` tyConsOfType b)
505 `addOneToUniqSet` funTyCon
506 tyConsOfType (ForAllTy _ ty) = tyConsOfType ty
507 tyConsOfType other = pprPanic "ClosureConv.tyConsOfType" $ ppr other
509 tyConsOfTypes :: [Type] -> UniqSet TyCon
510 tyConsOfTypes = unionManyUniqSets . map tyConsOfType