2 % (c) The University of Glasgow 2001
6 module MkExternalCore (
10 #include "HsVersions.h"
12 import qualified ExternalCore as C
33 import PprExternalCore
37 emitExternalCore :: DynFlags -> ModIface -> ModDetails -> IO ()
38 emitExternalCore dflags iface details
39 | opt_EmitExternalCore
40 = (do handle <- openFile corename WriteMode
41 hPutStr handle (show (mkExternalCore iface details))
43 `catch` (\err -> pprPanic "Failed to open or write external core output file"
45 where corename = extCoreName dflags
46 emitExternalCore _ _ _
51 mkExternalCore :: ModIface -> ModDetails -> C.Module
52 mkExternalCore (ModIface {mi_module=mi_module,mi_exports=mi_exports})
53 (ModDetails {md_types=md_types,md_binds=md_binds}) =
54 C.Module mname {- exports -} tdefs vdefs
56 mname = make_mid mi_module
57 {- exports = foldr (collect_exports md_types) ([],[],[]) all_avails
58 all_avails = concat (map snd (filter ((== moduleName mi_module) . fst) mi_exports))
60 tdefs = foldr collect_tdefs [] (typeEnvTyCons md_types)
61 vdefs = map make_vdef md_binds
64 collect_exports :: TypeEnv -> AvailInfo -> ([C.Tcon],[C.Dcon],[C.Var]) -> ([C.Tcon],[C.Dcon],[C.Var])
65 collect_exports tyenv (Avail n) (tcons,dcons,vars) = (tcons,dcons,make_var_id n:vars)
66 collect_exports tyenv (AvailTC n ns) (tcons,dcons,vars) =
67 case lookupNameEnv_NF tyenv n of
68 ATyCon tc | isAlgTyCon tc ->
69 (tcon ++ tcons,workers ++ dcons,wrappers ++ vars)
71 tcon = if elem n ns then [make_con_id n] else []
72 workers = if isNewTyCon tc then []
73 else map (make_con_id . idName . dataConId) exported_dcs
74 exported_dcs = filter (\dc -> elem ((idName . dataConWrapId) dc) ns') dcs
75 dcs = tyConDataConsIfAvailable tc
76 wrappers = map make_var_id ns'
77 ns' = filter (\n' -> n' /= n && not (elem n' recordSels)) ns
78 recordSels = map idName (tyConSelIds tc)
79 AClass cl -> {- maybe a little too free about exports -}
80 (tcon : tcons,workers ++ dcons,wrappers ++ vars)
82 tcon = make_con_id (tyConName tc)
83 workers = if isNewTyCon tc then []
84 else map (make_con_id . idName . dataConId) dcs
85 wrappers = map (make_var_id . idName . dataConWrapId) dcs
86 dcs = tyConDataConsIfAvailable tc
88 _ -> (tcons,dcons,vars)
92 collect_tdefs :: TyCon -> [C.Tdef] -> [C.Tdef]
93 collect_tdefs tcon tdefs | isAlgTyCon tcon = tdef:tdefs
96 case newTyConRep tcon of
98 C.Newtype (make_con_id (tyConName tcon)) (map make_tbind (tyConTyVars tcon)) (make_ty rep)
100 C.Data (make_con_id (tyConName tcon)) (map make_tbind (tyConTyVars tcon)) (map make_cdef (tyConDataCons 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.Ccall (_UNPK_ nm) (make_ty (varType v))
132 _ -> C.Var (make_var_qid (Var.varName v))
133 make_exp (Lit l) = C.Lit (make_lit l)
134 make_exp (App e (Type t)) = C.Appt (make_exp e) (make_ty t)
135 make_exp (App e1 e2) = C.App (make_exp e1) (make_exp e2)
136 make_exp (Lam v e) | isTyVar v = C.Lam (C.Tb (make_tbind v)) (make_exp e)
137 make_exp (Lam v e) | otherwise = C.Lam (C.Vb (make_vbind v)) (make_exp e)
138 make_exp (Let b e) = C.Let (snd (make_vdef b)) (make_exp e)
139 make_exp (Case e v alts) = C.Case (make_exp e) (make_vbind v) (map make_alt alts)
140 make_exp (Note (SCC cc) e) = C.Note "SCC" (make_exp e) -- temporary
141 make_exp (Note (Coerce t_to t_from) e) = C.Coerce (make_ty t_to) (make_exp e)
142 make_exp (Note InlineCall e) = C.Note "InlineCall" (make_exp e)
143 make_exp (Note InlineMe e) = C.Note "InlineMe" (make_exp e)
144 make_exp _ = error "MkExternalCore died: make_exp"
146 make_alt :: CoreAlt -> C.Alt
147 make_alt (DataAlt dcon, vs, e) =
148 C.Acon (make_con_qid (idName (dataConId dcon))) (map make_tbind tbs) (map make_vbind vbs) (make_exp e)
149 where (tbs,vbs) = span isTyVar vs
150 make_alt (LitAlt l,_,e) = C.Alit (make_lit l) (make_exp e)
151 make_alt (DEFAULT,[],e) = C.Adefault (make_exp e)
153 make_lit :: Literal -> C.Lit
156 MachChar i -> C.Lchar (chr i) t
157 MachStr s -> C.Lstring (_UNPK_ s) t
158 MachAddr i -> C.Lint i t
159 MachInt i -> C.Lint i t
160 MachInt64 i -> C.Lint i t
161 MachWord i -> C.Lint i t
162 MachWord64 i -> C.Lint i t
163 MachFloat r -> C.Lrational r t
164 MachDouble r -> C.Lrational r t
165 MachLabel s -> C.Lstring (_UNPK_ s) t
166 _ -> error "MkExternalCore died: make_lit"
168 t = make_ty (literalType l)
170 make_ty :: Type -> C.Ty
171 make_ty (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv))
172 make_ty (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2)
173 make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc))) (map make_ty ts)
174 make_ty (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2])
175 make_ty (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t)
176 make_ty (PredTy p) = make_ty (predRepTy p)
177 make_ty (UsageTy _ t) = make_ty t
178 make_ty (NoteTy _ t) = make_ty t
181 make_kind :: Kind -> C.Kind
182 make_kind (FunTy k1 k2) = C.Karrow (make_kind k1) (make_kind k2)
183 make_kind k | k == liftedTypeKind = C.Klifted
184 make_kind k | k == unliftedTypeKind = C.Kunlifted
185 make_kind k | k == openTypeKind = C.Kopen
186 make_kind _ = error "MkExternalCore died: make_kind"
190 {- Use encoded strings, except restore non-leading '#'s.
191 Also, adjust casing to work around some badly-chosen internal names. -}
192 make_id :: Bool -> Name -> C.Id
195 c:cs -> if isUpper c && is_var then (toLower c):(decode cs) else (decode n)
196 where n = (occNameString . nameOccName) nm
197 decode ('z':'h':cs) = '#':(decode cs)
198 decode (c:cs) = c:(decode cs)
201 make_var_id :: Name -> C.Id
202 make_var_id = make_id True
204 make_con_id :: Name -> C.Id
205 make_con_id = make_id False
207 make_mid :: Module -> C.Id
208 make_mid = moduleNameString . moduleName
210 make_qid :: Bool -> Name -> C.Qual C.Id
211 make_qid is_var n = (mname,make_id is_var n)
213 case nameModule_maybe n of
215 Nothing -> "" -- for now!
217 make_var_qid :: Name -> C.Qual C.Id
218 make_var_qid = make_qid True
220 make_con_qid :: Name -> C.Qual C.Id
221 make_con_qid = make_qid False