2 % (c) The University of Glasgow 2001
6 module MkExternalCore (
10 #include "HsVersions.h"
12 import qualified ExternalCore as C
29 import PprExternalCore
33 emitExternalCore :: DynFlags -> ModIface -> ModDetails -> IO ()
34 emitExternalCore dflags iface details
35 | opt_EmitExternalCore
36 = (do handle <- openFile corename WriteMode
37 hPutStr handle (show (mkExternalCore iface details))
39 `catch` (\err -> pprPanic "Failed to open or write external core output file"
41 where corename = extCoreName dflags
42 emitExternalCore _ _ _
47 mkExternalCore :: ModIface -> ModDetails -> C.Module
48 mkExternalCore (ModIface {mi_module=mi_module,mi_exports=mi_exports})
49 (ModDetails {md_types=md_types,md_binds=md_binds}) =
50 C.Module mname {- exports -} tdefs vdefs
52 mname = make_mid mi_module
53 {- exports = foldr (collect_exports md_types) ([],[],[]) all_avails
54 all_avails = concat (map snd (filter ((== moduleName mi_module) . fst) mi_exports))
56 tdefs = foldr collect_tdefs [] (typeEnvTyCons md_types)
57 vdefs = map make_vdef md_binds
60 collect_exports :: TypeEnv -> AvailInfo -> ([C.Tcon],[C.Dcon],[C.Var]) -> ([C.Tcon],[C.Dcon],[C.Var])
61 collect_exports tyenv (Avail n) (tcons,dcons,vars) = (tcons,dcons,make_var_id n:vars)
62 collect_exports tyenv (AvailTC n ns) (tcons,dcons,vars) =
63 case lookupNameEnv_NF tyenv n of
64 ATyCon tc | isAlgTyCon tc ->
65 (tcon ++ tcons,workers ++ dcons,wrappers ++ vars)
67 tcon = if elem n ns then [make_con_id n] else []
68 workers = if isNewTyCon tc then []
69 else map (make_con_id . idName . dataConId) exported_dcs
70 exported_dcs = filter (\dc -> elem ((idName . dataConWrapId) dc) ns') dcs
71 dcs = tyConDataConsIfAvailable tc
72 wrappers = map make_var_id ns'
73 ns' = filter (\n' -> n' /= n && not (elem n' recordSels)) ns
74 recordSels = map idName (tyConSelIds tc)
75 AClass cl -> {- maybe a little too free about exports -}
76 (tcon : tcons,workers ++ dcons,wrappers ++ vars)
78 tcon = make_con_id (tyConName tc)
79 workers = if isNewTyCon tc then []
80 else map (make_con_id . idName . dataConId) dcs
81 wrappers = map (make_var_id . idName . dataConWrapId) dcs
82 dcs = tyConDataConsIfAvailable tc
84 _ -> (tcons,dcons,vars)
88 collect_tdefs :: TyCon -> [C.Tdef] -> [C.Tdef]
89 collect_tdefs tcon tdefs
90 | isAlgTyCon tcon = tdef: tdefs
92 tdef | isNewTyCon tcon =
93 C.Newtype (make_con_id (tyConName tcon)) (map make_tbind tyvars) repclause
95 C.Data (make_con_id (tyConName tcon)) (map make_tbind tyvars) (map make_cdef (tyConDataCons tcon))
96 where repclause | isRecursiveTyCon tcon = Nothing
97 | otherwise = Just (make_ty rep)
98 where (_, rep) = newTyConRep tcon
99 tyvars = tyConTyVars tcon
101 collect_tdefs _ tdefs = tdefs
104 make_cdef :: DataCon -> C.Cdef
105 make_cdef dcon = C.Constr dcon_name existentials tys
107 dcon_name = make_con_id (idName (dataConId dcon))
108 existentials = map make_tbind ex_tyvars
109 where (_,_,ex_tyvars,_,_,_) = dataConSig dcon
110 tys = map make_ty (dataConRepArgTys dcon)
112 make_tbind :: TyVar -> C.Tbind
113 make_tbind tv = (make_var_id (tyVarName tv), make_kind (tyVarKind tv))
115 make_vbind :: Var -> C.Vbind
116 make_vbind v = (make_var_id (Var.varName v), make_ty (varType v))
118 make_vdef :: CoreBind -> (Bool, C.Vdefg)
121 NonRec v e -> (isGlobalId v,C.Nonrec (f (v,e)))
122 Rec ves -> (or (map g ves),C.Rec (map f ves))
123 where f (v,e) = (n,t,make_exp e)
124 where (n,t) = make_vbind v
125 g (v,e) = isGlobalId v
127 make_exp :: CoreExpr -> C.Exp
129 case globalIdDetails v of
130 DataConId _ -> C.Dcon (make_con_qid (Var.varName v))
131 FCallId (CCall (CCallSpec (StaticTarget nm) _ _)) -> C.External (_UNPK_ nm) (make_ty (varType v))
132 FCallId _ -> error "MkExternalCore died: can't handle non-static-C foreign call"
133 _ -> C.Var (make_var_qid (Var.varName v))
134 make_exp (Lit (l@(MachLabel s))) = C.External (_UNPK_ s) (make_ty (literalType l))
135 make_exp (Lit l) = C.Lit (make_lit l)
136 make_exp (App e (Type t)) = C.Appt (make_exp e) (make_ty t)
137 make_exp (App e1 e2) = C.App (make_exp e1) (make_exp e2)
138 make_exp (Lam v e) | isTyVar v = C.Lam (C.Tb (make_tbind v)) (make_exp e)
139 make_exp (Lam v e) | otherwise = C.Lam (C.Vb (make_vbind v)) (make_exp e)
140 make_exp (Let b e) = C.Let (snd (make_vdef b)) (make_exp e)
141 make_exp (Case e v alts) = C.Case (make_exp e) (make_vbind v) (map make_alt alts)
142 make_exp (Note (SCC cc) e) = C.Note "SCC" (make_exp e) -- temporary
143 make_exp (Note (Coerce t_to t_from) e) = C.Coerce (make_ty t_to) (make_exp e)
144 make_exp (Note InlineCall e) = C.Note "InlineCall" (make_exp e)
145 make_exp (Note InlineMe e) = C.Note "InlineMe" (make_exp e)
146 make_exp _ = error "MkExternalCore died: make_exp"
148 make_alt :: CoreAlt -> C.Alt
149 make_alt (DataAlt dcon, vs, e) =
150 C.Acon (make_con_qid (idName (dataConId dcon))) (map make_tbind tbs) (map make_vbind vbs) (make_exp e)
151 where (tbs,vbs) = span isTyVar vs
152 make_alt (LitAlt l,_,e) = C.Alit (make_lit l) (make_exp e)
153 make_alt (DEFAULT,[],e) = C.Adefault (make_exp e)
155 make_lit :: Literal -> C.Lit
158 MachChar i | i <= 0xff -> C.Lchar (chr i) t
159 MachChar i | otherwise -> C.Lint (toEnum i) t
160 MachStr s -> C.Lstring (_UNPK_ s) t
161 MachAddr i -> C.Lint i t
162 MachInt i -> C.Lint i t
163 MachInt64 i -> C.Lint i t
164 MachWord i -> C.Lint i t
165 MachWord64 i -> C.Lint i t
166 MachFloat r -> C.Lrational r t
167 MachDouble r -> C.Lrational r t
168 _ -> error "MkExternalCore died: make_lit"
170 t = make_ty (literalType l)
172 make_ty :: Type -> C.Ty
173 make_ty (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv))
174 make_ty (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2)
175 make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc))) (map make_ty ts)
176 make_ty (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2])
177 make_ty (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t)
178 make_ty (SourceTy p) = make_ty (sourceTypeRep p)
179 make_ty (UsageTy _ t) = make_ty t
180 make_ty (NoteTy _ t) = make_ty t
183 make_kind :: Kind -> C.Kind
184 make_kind (FunTy k1 k2) = C.Karrow (make_kind k1) (make_kind k2)
185 make_kind k | k `eqKind` liftedTypeKind = C.Klifted
186 make_kind k | k `eqKind` unliftedTypeKind = C.Kunlifted
187 make_kind k | k `eqKind` openTypeKind = C.Kopen
188 make_kind _ = error "MkExternalCore died: make_kind"
192 {- Use encoded strings.
193 Also, adjust casing to work around some badly-chosen internal names. -}
194 make_id :: Bool -> Name -> C.Id
197 'Z':cs | is_var -> 'z':cs
198 'z':cs | not is_var -> 'Z':cs
199 c:cs | isUpper c && is_var -> 'z':'d':n
200 c:cs | isLower c && (not is_var) -> 'Z':'d':n
202 where n = (occNameString . nameOccName) nm
204 make_var_id :: Name -> C.Id
205 make_var_id = make_id True
207 make_con_id :: Name -> C.Id
208 make_con_id = make_id False
210 make_mid :: Module -> C.Id
211 make_mid = moduleNameString . moduleName
213 make_qid :: Bool -> Name -> C.Qual C.Id
214 make_qid is_var n = (mname,make_id is_var n)
216 case nameModule_maybe n of
218 Nothing -> "" -- for now!
220 make_var_qid :: Name -> C.Qual C.Id
221 make_var_qid = make_qid True
223 make_con_qid :: Name -> C.Qual C.Id
224 make_con_qid = make_qid False