1 {-# OPTIONS_GHC -XNoMonoLocalBinds -fno-warn-missing-signatures #-}
2 -- Roman likes local bindings
3 -- If this module lives on I'd like to get rid of this flag in due course
5 module Vectorise.Type.Env (
11 import Vectorise.Monad
12 import Vectorise.Builtins
13 import Vectorise.Type.TyConDecl
14 import Vectorise.Type.Classify
15 import Vectorise.Type.PADict
16 import Vectorise.Type.PData
17 import Vectorise.Type.PRepr
18 import Vectorise.Type.Repr
19 import Vectorise.Utils
45 dtrace s x = if debug then pprTrace "VectType" s x else x
48 -- | Vectorise a type environment.
49 -- The type environment contains all the type things defined in a module.
52 -> VM ( TypeEnv -- Vectorised type environment.
53 , [FamInst] -- New type family instances.
54 , [(Var, CoreExpr)]) -- New top level bindings.
59 cs <- readGEnv $ mk_map . global_tycons
61 -- Split the list of TyCons into the ones we have to vectorise vs the
62 -- ones we can pass through unchanged. We also pass through algebraic
63 -- types that use non Haskell98 features, as we don't handle those.
64 let (conv_tcs, keep_tcs) = classifyTyCons cs groups
65 keep_dcs = concatMap tyConDataCons keep_tcs
67 zipWithM_ defTyCon keep_tcs keep_tcs
68 zipWithM_ defDataCon keep_dcs keep_dcs
70 new_tcs <- vectTyConDecls conv_tcs
72 let orig_tcs = keep_tcs ++ conv_tcs
74 -- We don't need to make new representation types for dictionary
75 -- constructors. The constructors are always fully applied, and we don't
76 -- need to lift them to arrays as a dictionary of a particular type
77 -- always has the same value.
78 let vect_tcs = filter (not . isClassTyCon)
81 (_, binds, inst_tcs) <- fixV $ \ ~(dfuns', _, _) ->
83 defTyConPAs (zipLazy vect_tcs dfuns')
84 reprs <- mapM tyConRepr vect_tcs
85 repr_tcs <- zipWith3M buildPReprTyCon orig_tcs vect_tcs reprs
86 pdata_tcs <- zipWith3M buildPDataTyCon orig_tcs vect_tcs reprs
89 $ zipWith5 buildTyConBindings
97 return (dfuns, binds, repr_tcs ++ pdata_tcs)
99 let all_new_tcs = new_tcs ++ inst_tcs
101 let new_env = extendTypeEnvList env
102 (map ATyCon all_new_tcs
103 ++ [ADataCon dc | tc <- all_new_tcs
104 , dc <- tyConDataCons tc])
106 return (new_env, map mkLocalFamInst inst_tcs, binds)
108 tycons = typeEnvTyCons env
109 groups = tyConGroups tycons
111 mk_map env = listToUFM_Directly [(u, getUnique n /= u) | (u,n) <- nameEnvUniqueElts env]
115 buildTyConBindings :: TyCon -> TyCon -> TyCon -> TyCon -> SumRepr -> VM Var
116 buildTyConBindings orig_tc vect_tc prepr_tc pdata_tc repr
117 = do vectDataConWorkers orig_tc vect_tc pdata_tc
118 buildPADict vect_tc prepr_tc pdata_tc repr
121 vectDataConWorkers :: TyCon -> TyCon -> TyCon -> VM ()
122 vectDataConWorkers orig_tc vect_tc arr_tc
124 . zipWith3 def_worker (tyConDataCons orig_tc) rep_tys
125 $ zipWith4 mk_data_con (tyConDataCons vect_tc)
128 (tail $ tails rep_tys)
129 mapM_ (uncurry hoistBinding) bs
131 tyvars = tyConTyVars vect_tc
132 var_tys = mkTyVarTys tyvars
133 ty_args = map Type var_tys
134 res_ty = mkTyConApp vect_tc var_tys
136 cons = tyConDataCons vect_tc
138 [arr_dc] = tyConDataCons arr_tc
140 rep_tys = map dataConRepArgTys $ tyConDataCons vect_tc
143 mk_data_con con tys pre post
144 = liftM2 (,) (vect_data_con con)
145 (lift_data_con tys pre post (mkDataConTag con))
147 sel_replicate len tag
149 rep <- builtin (selReplicate arity)
150 return [rep `mkApps` [len, tag]]
152 | otherwise = return []
154 vect_data_con con = return $ mkConApp con ty_args
155 lift_data_con tys pre_tys post_tys tag
157 len <- builtin liftingContext
158 args <- mapM (newLocalVar (fsLit "xs"))
159 =<< mapM mkPDataType tys
161 sel <- sel_replicate (Var len) tag
163 pre <- mapM emptyPD (concat pre_tys)
164 post <- mapM emptyPD (concat post_tys)
166 return . mkLams (len : args)
167 . wrapFamInstBody arr_tc var_tys
169 $ ty_args ++ sel ++ pre ++ map Var args ++ post
171 def_worker data_con arg_tys mk_body
173 arity <- polyArity tyvars
176 . polyAbstract tyvars $ \args ->
177 liftM (mkLams (tyvars ++ args) . vectorised)
178 $ buildClosures tyvars [] arg_tys res_ty mk_body
180 raw_worker <- cloneId mkVectOcc orig_worker (exprType body)
181 let vect_worker = raw_worker `setIdUnfolding`
182 mkInlineRule body (Just arity)
183 defGlobalVar orig_worker vect_worker
184 return (vect_worker, body)
186 orig_worker = dataConWorkId data_con