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 tdefs vdefs
52 mname = make_mid mi_module
53 tdefs = foldr collect_tdefs [] (typeEnvTyCons md_types)
54 vdefs = map make_vdef md_binds
56 collect_tdefs :: TyCon -> [C.Tdef] -> [C.Tdef]
57 collect_tdefs tcon tdefs
58 | isAlgTyCon tcon = tdef: tdefs
60 tdef | isNewTyCon tcon =
61 C.Newtype (make_con_qid (tyConName tcon)) (map make_tbind tyvars) repclause
63 C.Data (make_con_qid (tyConName tcon)) (map make_tbind tyvars) (map make_cdef (tyConDataCons tcon))
64 where repclause | isRecursiveTyCon tcon = Nothing
65 | otherwise = Just (make_ty rep)
66 where (_, rep) = newTyConRep tcon
67 tyvars = tyConTyVars tcon
69 collect_tdefs _ tdefs = tdefs
72 make_cdef :: DataCon -> C.Cdef
73 make_cdef dcon = C.Constr dcon_name existentials tys
75 dcon_name = make_con_qid (idName (dataConId dcon))
76 existentials = map make_tbind ex_tyvars
77 where (_,_,ex_tyvars,_,_,_) = dataConSig dcon
78 tys = map make_ty (dataConRepArgTys dcon)
80 make_tbind :: TyVar -> C.Tbind
81 make_tbind tv = (make_var_id (tyVarName tv), make_kind (tyVarKind tv))
83 make_vbind :: Var -> C.Vbind
84 make_vbind v = (make_var_id (Var.varName v), make_ty (varType v))
86 make_vdef :: CoreBind -> C.Vdefg
89 NonRec v e -> C.Nonrec (f (v,e))
90 Rec ves -> C.Rec (map f ves)
91 where f (v,e) = (make_var_qid (Var.varName v), make_ty (varType v),make_exp e)
93 make_exp :: CoreExpr -> C.Exp
95 case globalIdDetails v of
96 DataConId _ -> C.Dcon (make_con_qid (Var.varName v))
97 FCallId (CCall (CCallSpec (StaticTarget nm) _ _)) -> C.External (_UNPK_ nm) (make_ty (varType v))
98 FCallId _ -> error "MkExternalCore died: can't handle non-static-C foreign call"
99 _ -> C.Var (make_var_qid (Var.varName v))
100 make_exp (Lit (l@(MachLabel s))) = C.External (_UNPK_ s) (make_ty (literalType l))
101 make_exp (Lit l) = C.Lit (make_lit l)
102 make_exp (App e (Type t)) = C.Appt (make_exp e) (make_ty t)
103 make_exp (App e1 e2) = C.App (make_exp e1) (make_exp e2)
104 make_exp (Lam v e) | isTyVar v = C.Lam (C.Tb (make_tbind v)) (make_exp e)
105 make_exp (Lam v e) | otherwise = C.Lam (C.Vb (make_vbind v)) (make_exp e)
106 make_exp (Let b e) = C.Let (make_vdef b) (make_exp e)
107 make_exp (Case e v alts) = C.Case (make_exp e) (make_vbind v) (map make_alt alts)
108 make_exp (Note (SCC cc) e) = C.Note "SCC" (make_exp e) -- temporary
109 make_exp (Note (Coerce t_to t_from) e) = C.Coerce (make_ty t_to) (make_exp e)
110 make_exp (Note InlineCall e) = C.Note "InlineCall" (make_exp e)
111 make_exp (Note InlineMe e) = C.Note "InlineMe" (make_exp e)
112 make_exp _ = error "MkExternalCore died: make_exp"
114 make_alt :: CoreAlt -> C.Alt
115 make_alt (DataAlt dcon, vs, e) =
116 C.Acon (make_con_qid (idName (dataConId dcon))) (map make_tbind tbs) (map make_vbind vbs) (make_exp e)
117 where (tbs,vbs) = span isTyVar vs
118 make_alt (LitAlt l,_,e) = C.Alit (make_lit l) (make_exp e)
119 make_alt (DEFAULT,[],e) = C.Adefault (make_exp e)
121 make_lit :: Literal -> C.Lit
124 MachChar i | i <= 0xff -> C.Lchar (chr i) t
125 MachChar i | otherwise -> C.Lint (toEnum i) t
126 MachStr s -> C.Lstring (_UNPK_ s) t
127 MachAddr i -> C.Lint i t
128 MachInt i -> C.Lint i t
129 MachInt64 i -> C.Lint i t
130 MachWord i -> C.Lint i t
131 MachWord64 i -> C.Lint i t
132 MachFloat r -> C.Lrational r t
133 MachDouble r -> C.Lrational r t
134 _ -> error "MkExternalCore died: make_lit"
136 t = make_ty (literalType l)
138 make_ty :: Type -> C.Ty
139 make_ty (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv))
140 make_ty (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2)
141 make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc))) (map make_ty ts)
142 make_ty (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2])
143 make_ty (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t)
144 make_ty (SourceTy p) = make_ty (sourceTypeRep p)
145 make_ty (UsageTy _ t) = make_ty t
146 make_ty (NoteTy _ t) = make_ty t
149 make_kind :: Kind -> C.Kind
150 make_kind (FunTy k1 k2) = C.Karrow (make_kind k1) (make_kind k2)
151 make_kind k | k `eqKind` liftedTypeKind = C.Klifted
152 make_kind k | k `eqKind` unliftedTypeKind = C.Kunlifted
153 make_kind k | k `eqKind` openTypeKind = C.Kopen
154 make_kind _ = error "MkExternalCore died: make_kind"
158 {- Use encoded strings.
159 Also, adjust casing to work around some badly-chosen internal names. -}
160 make_id :: Bool -> Name -> C.Id
163 'Z':cs | is_var -> 'z':cs
164 'z':cs | not is_var -> 'Z':cs
165 c:cs | isUpper c && is_var -> 'z':'d':n
166 c:cs | isLower c && (not is_var) -> 'Z':'d':n
168 where n = (occNameString . nameOccName) nm
170 make_var_id :: Name -> C.Id
171 make_var_id = make_id True
173 make_mid :: Module -> C.Id
174 make_mid = moduleNameString . moduleName
176 make_qid :: Bool -> Name -> C.Qual C.Id
177 make_qid is_var n = (mname,make_id is_var n)
179 case nameModule_maybe n of
183 make_var_qid :: Name -> C.Qual C.Id
184 make_var_qid = make_qid True
186 make_con_qid :: Name -> C.Qual C.Id
187 make_con_qid = make_qid False