X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FcoreSyn%2FMkExternalCore.lhs;h=99ea425251dfbced9b6d4526fc0567bc82bbf3c8;hp=291b16e823eb0770bd3ac63fdf3374cd2ba40687;hb=e4417dcd4679da9c6b18c02ff667199c572bed89;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1 diff --git a/compiler/coreSyn/MkExternalCore.lhs b/compiler/coreSyn/MkExternalCore.lhs index 291b16e..99ea425 100644 --- a/compiler/coreSyn/MkExternalCore.lhs +++ b/compiler/coreSyn/MkExternalCore.lhs @@ -1,8 +1,7 @@ -% -% (c) The University of Glasgow 2001 + +% (c) The University of Glasgow 2001-2006 % \begin{code} - module MkExternalCore ( emitExternalCore ) where @@ -10,50 +9,72 @@ module MkExternalCore ( #include "HsVersions.h" import qualified ExternalCore as C -import Char import Module import CoreSyn import HscTypes import TyCon import TypeRep import Type -import PprExternalCore -- Instances -import DataCon ( DataCon, dataConTyVars, dataConRepArgTys, - dataConName, dataConTyCon ) -import CoreSyn +import PprExternalCore () -- Instances +import DataCon +import Coercion import Var import IdInfo -import Kind import Literal import Name import Outputable +import Encoding import ForeignCall -import DynFlags ( DynFlags(..) ) -import StaticFlags ( opt_EmitExternalCore ) -import IO +import DynFlags +import StaticFlags import FastString +import IO +import Data.Char + emitExternalCore :: DynFlags -> CgGuts -> IO () emitExternalCore dflags cg_guts | opt_EmitExternalCore = (do handle <- openFile corename WriteMode hPutStrLn handle (show (mkExternalCore cg_guts)) hClose handle) - `catch` (\err -> pprPanic "Failed to open or write external core output file" - (text corename)) + `catch` (\_ -> pprPanic "Failed to open or write external core output file" + (text corename)) where corename = extCoreName dflags emitExternalCore _ _ | otherwise = return () +-- Reinventing the Reader monad; whee. +newtype CoreM a = CoreM (CoreState -> (CoreState, a)) +type CoreState = Module +instance Monad CoreM where + (CoreM m) >>= f = CoreM (\ s -> case m s of + (s',r) -> case f r of + CoreM f' -> f' s') + return x = CoreM (\ s -> (s, x)) +runCoreM :: CoreM a -> CoreState -> a +runCoreM (CoreM f) s = snd $ f s +ask :: CoreM CoreState +ask = CoreM (\ s -> (s,s)) mkExternalCore :: CgGuts -> C.Module -- The ModGuts has been tidied, but the implicit bindings have -- not been injected, so we have to add them manually here -- We don't include the strange data-con *workers* because they are -- implicit in the data type declaration itself -mkExternalCore (CgGuts {cg_module=this_mod, cg_tycons = tycons, cg_binds = binds}) - = C.Module mname tdefs (map make_vdef binds) +mkExternalCore (CgGuts {cg_module=this_mod, cg_tycons = tycons, + cg_binds = binds}) + -- Note that we flatten binds at the top level: + -- every module is just a single recursive bag of declarations. + -- Rationale: since modules can be mutually recursive, + -- there's not much reason to preserve dependency info within a module. + = C.Module mname tdefs (case flattenBinds binds of + -- check for empty list so we don't create an + -- empty Rec group + [] -> [] + bs -> [(runCoreM (make_vdef True + (Rec bs)) this_mod)]) where mname = make_mid this_mod tdefs = foldr collect_tdefs [] tycons @@ -63,24 +84,32 @@ collect_tdefs tcon tdefs | isAlgTyCon tcon = tdef: tdefs where tdef | isNewTyCon tcon = - C.Newtype (make_con_qid (tyConName tcon)) (map make_tbind tyvars) repclause - | null (tyConDataCons tcon) = error "MkExternalCore died: can't handle datatype declarations with no data constructors" + C.Newtype (qtc tcon) + (case newTyConCo_maybe tcon of + Just co -> qtc co + Nothing -> pprPanic ("MkExternalCore: newtype tcon\ + should have a coercion: ") (ppr tcon)) + (map make_tbind tyvars) + repclause | otherwise = - C.Data (make_con_qid (tyConName tcon)) (map make_tbind tyvars) (map make_cdef (tyConDataCons tcon)) - where repclause | isRecursiveTyCon tcon = Nothing - | otherwise = Just (make_ty rep) - where (_, rep) = newTyConRep tcon + C.Data (qtc tcon) (map make_tbind tyvars) + (map make_cdef (tyConDataCons tcon)) + where repclause | isRecursiveTyCon tcon || isOpenTyCon tcon= Nothing + | otherwise = Just (make_ty (snd (newTyConRhs tcon))) tyvars = tyConTyVars tcon collect_tdefs _ tdefs = tdefs +qtc :: TyCon -> C.Qual C.Tcon +qtc = make_con_qid . tyConName + make_cdef :: DataCon -> C.Cdef make_cdef dcon = C.Constr dcon_name existentials tys where - dcon_name = make_var_id (dataConName dcon) + dcon_name = make_qid False False (dataConName dcon) existentials = map make_tbind ex_tyvars - ex_tyvars = drop (tyConArity (dataConTyCon dcon)) (dataConTyVars dcon) + ex_tyvars = dataConExTyVars dcon tys = map make_ty (dataConRepArgTys dcon) make_tbind :: TyVar -> C.Tbind @@ -89,52 +118,89 @@ make_tbind tv = (make_var_id (tyVarName tv), make_kind (tyVarKind tv)) make_vbind :: Var -> C.Vbind make_vbind v = (make_var_id (Var.varName v), make_ty (idType v)) -make_vdef :: CoreBind -> C.Vdefg -make_vdef b = +make_vdef :: Bool -> CoreBind -> CoreM C.Vdefg +make_vdef topLevel b = case b of - NonRec v e -> C.Nonrec (f (v,e)) - Rec ves -> C.Rec (map f ves) - where f (v,e) = (make_var_id (Var.varName v), make_ty (idType v),make_exp e) - -- Top level bindings are unqualified now - -make_exp :: CoreExpr -> C.Exp -make_exp (Var v) = - case globalIdDetails v of - -- a DataConId represents the Id of a worker, which is a varName. -- sof 4/02 --- DataConId _ -> C.Dcon (make_con_qid (Var.varName v)) - FCallId (CCall (CCallSpec (StaticTarget nm) _ _)) -> C.External (unpackFS nm) (make_ty (idType v)) - FCallId _ -> error "MkExternalCore died: can't handle non-static-C foreign call" - _ -> C.Var (make_var_qid (Var.varName v)) -make_exp (Lit (l@(MachLabel s _))) = error "MkExternalCore died: can't handle \"foreign label\" declarations" -make_exp (Lit l) = C.Lit (make_lit l) -make_exp (App e (Type t)) = C.Appt (make_exp e) (make_ty t) -make_exp (App e1 e2) = C.App (make_exp e1) (make_exp e2) -make_exp (Lam v e) | isTyVar v = C.Lam (C.Tb (make_tbind v)) (make_exp e) -make_exp (Lam v e) | otherwise = C.Lam (C.Vb (make_vbind v)) (make_exp e) -make_exp (Let b e) = C.Let (make_vdef b) (make_exp e) --- gaw 2004 -make_exp (Case e v ty alts) = C.Case (make_exp e) (make_vbind v) (make_ty ty) (map make_alt alts) -make_exp (Note (SCC cc) e) = C.Note "SCC" (make_exp e) -- temporary -make_exp (Note (Coerce t_to t_from) e) = C.Coerce (make_ty t_to) (make_exp e) -make_exp (Note InlineCall e) = C.Note "InlineCall" (make_exp e) -make_exp (Note (CoreNote s) e) = C.Note s (make_exp e) -- hdaume: core annotations -make_exp (Note InlineMe e) = C.Note "InlineMe" (make_exp e) + NonRec v e -> f (v,e) >>= (return . C.Nonrec) + Rec ves -> mapM f ves >>= (return . C.Rec) + where + f :: (CoreBndr,CoreExpr) -> CoreM C.Vdef + f (v,e) = do + localN <- isALocal vName + let local = not topLevel || localN + rhs <- make_exp e + -- use local flag to determine where to add the module name + return (local, make_qid local True vName, make_ty (idType v),rhs) + where vName = Var.varName v + +make_exp :: CoreExpr -> CoreM C.Exp +make_exp (Var v) = do + let vName = Var.varName v + isLocal <- isALocal vName + return $ + case globalIdDetails v of + FCallId (CCall (CCallSpec (StaticTarget nm) callconv _)) + -> C.External (unpackFS nm) (showSDoc (ppr callconv)) (make_ty (idType v)) + FCallId (CCall (CCallSpec DynamicTarget callconv _)) + -> C.DynExternal (showSDoc (ppr callconv)) (make_ty (idType v)) + FCallId _ + -> pprPanic "MkExternalCore died: can't handle non-{static,dynamic}-C foreign call" + (ppr v) + -- Constructors are always exported, so make sure to declare them + -- with qualified names + DataConWorkId _ -> C.Var (make_var_qid False vName) + DataConWrapId _ -> C.Var (make_var_qid False vName) + _ -> C.Var (make_var_qid isLocal vName) +make_exp (Lit (MachLabel s _)) = return $ C.Label (unpackFS s) +make_exp (Lit l) = return $ C.Lit (make_lit l) +make_exp (App e (Type t)) = make_exp e >>= (\ b -> return $ C.Appt b (make_ty t)) +make_exp (App e1 e2) = do + rator <- make_exp e1 + rand <- make_exp e2 + return $ C.App rator rand +make_exp (Lam v e) | isTyVar v = make_exp e >>= (\ b -> + return $ C.Lam (C.Tb (make_tbind v)) b) +make_exp (Lam v e) | otherwise = make_exp e >>= (\ b -> + return $ C.Lam (C.Vb (make_vbind v)) b) +make_exp (Cast e co) = make_exp e >>= (\ b -> return $ C.Cast b (make_ty co)) +make_exp (Let b e) = do + vd <- make_vdef False b + body <- make_exp e + return $ C.Let vd body +make_exp (Case e v ty alts) = do + scrut <- make_exp e + newAlts <- mapM make_alt alts + return $ C.Case scrut (make_vbind v) (make_ty ty) newAlts +make_exp (Note (SCC _) e) = make_exp e >>= (return . C.Note "SCC") -- temporary +make_exp (Note (CoreNote s) e) = make_exp e >>= (return . C.Note s) -- hdaume: core annotations +make_exp (Note InlineMe e) = make_exp e >>= (return . C.Note "InlineMe") make_exp _ = error "MkExternalCore died: make_exp" -make_alt :: CoreAlt -> C.Alt -make_alt (DataAlt dcon, vs, e) = - C.Acon (make_con_qid (dataConName dcon)) +make_alt :: CoreAlt -> CoreM C.Alt +make_alt (DataAlt dcon, vs, e) = do + newE <- make_exp e + return $ C.Acon (make_con_qid (dataConName dcon)) (map make_tbind tbs) (map make_vbind vbs) - (make_exp e) + newE where (tbs,vbs) = span isTyVar vs -make_alt (LitAlt l,_,e) = C.Alit (make_lit l) (make_exp e) -make_alt (DEFAULT,[],e) = C.Adefault (make_exp e) +make_alt (LitAlt l,_,e) = make_exp e >>= (return . (C.Alit (make_lit l))) +make_alt (DEFAULT,[],e) = make_exp e >>= (return . C.Adefault) +-- This should never happen, as the DEFAULT alternative binds no variables, +-- but we might as well check for it: +make_alt a@(DEFAULT,_ ,_) = pprPanic ("MkExternalCore: make_alt: DEFAULT " + ++ "alternative had a non-empty var list") (ppr a) + make_lit :: Literal -> C.Lit make_lit l = case l of - MachChar i -> C.Lchar i t + -- Note that we need to check whether the character is "big". + -- External Core only allows character literals up to '\xff'. + MachChar i | i <= chr 0xff -> C.Lchar i t + -- For a character bigger than 0xff, we represent it in ext-core + -- as an int lit with a char type. + MachChar i -> C.Lint (fromIntegral $ ord i) t MachStr s -> C.Lstring (unpackFS s) t MachNullAddr -> C.Lint 0 t MachInt i -> C.Lint i t @@ -147,12 +213,19 @@ make_lit l = where t = make_ty (literalType l) -make_ty :: Type -> C.Ty -make_ty (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv)) -make_ty (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2) -make_ty (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2]) -make_ty (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t) -make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc))) +-- Expand type synonyms, then convert. +make_ty :: Type -> C.Ty -- Be sure to expand types recursively! + -- example: FilePath ~> String ~> [Char] +make_ty t | Just expanded <- tcView t = make_ty expanded +make_ty t = make_ty' t + +-- note calls to make_ty so as to expand types recursively +make_ty' :: Type -> C.Ty +make_ty' (TyVarTy tv) = C.Tvar (make_var_id (tyVarName tv)) +make_ty' (AppTy t1 t2) = C.Tapp (make_ty t1) (make_ty t2) +make_ty' (FunTy t1 t2) = make_ty (TyConApp funTyCon [t1,t2]) +make_ty' (ForAllTy tv t) = C.Tforall (make_tbind tv) (make_ty t) +make_ty' (TyConApp tc ts) = foldl C.Tapp (C.Tcon (qtc tc)) (map make_ty ts) -- Newtypes are treated just like any other type constructor; not expanded -- Reason: predTypeRep does substitution and, while substitution deals @@ -166,55 +239,69 @@ make_ty (TyConApp tc ts) = foldl C.Tapp (C.Tcon (make_con_qid (tyConName tc))) -- expose the representation in interface files, which definitely isn't right. -- Maybe CoreTidy should know whether to expand newtypes or not? -make_ty (PredTy p) = make_ty (predTypeRep p) -make_ty (NoteTy _ t) = make_ty t +make_ty' (PredTy p) = make_ty (predTypeRep p) make_kind :: Kind -> C.Kind -make_kind (FunKind k1 k2) = C.Karrow (make_kind k1) (make_kind k2) -make_kind LiftedTypeKind = C.Klifted -make_kind UnliftedTypeKind = C.Kunlifted -make_kind OpenTypeKind = C.Kopen +make_kind (PredTy p) | isEqPred p = C.Keq (make_ty t1) (make_ty t2) + where (t1, t2) = getEqPredTys p +make_kind (FunTy k1 k2) = C.Karrow (make_kind k1) (make_kind k2) +make_kind k + | isLiftedTypeKind k = C.Klifted + | isUnliftedTypeKind k = C.Kunlifted + | isOpenTypeKind k = C.Kopen make_kind _ = error "MkExternalCore died: make_kind" {- Id generation. -} -{- Use encoded strings. - Also, adjust casing to work around some badly-chosen internal names. -} make_id :: Bool -> Name -> C.Id -make_id is_var nm = (occNameString . nameOccName) nm - -{- SIMON thinks this stuff isn't necessary -make_id is_var nm = - case n of - 'Z':cs | is_var -> 'z':cs - 'z':cs | not is_var -> 'Z':cs - c:cs | isUpper c && is_var -> 'z':'d':n - c:cs | isLower c && (not is_var) -> 'Z':'d':n - _ -> n - where n = (occNameString . nameOccName) nm --} +-- include uniques for internal names in order to avoid name shadowing +make_id _is_var nm = ((occNameString . nameOccName) nm) + ++ (if isInternalName nm then (show . nameUnique) nm else "") make_var_id :: Name -> C.Id make_var_id = make_id True +-- It's important to encode the module name here, because in External Core, +-- base:GHC.Base => base:GHCziBase +-- We don't do this in pprExternalCore because we +-- *do* want to keep the package name (we don't want baseZCGHCziBase, +-- because that would just be ugly.) +-- SIGH. +-- We encode the package name as well. make_mid :: Module -> C.Id -make_mid = moduleString - -make_qid :: Bool -> Name -> C.Qual C.Id -make_qid is_var n = (mname,make_id is_var n) +-- Super ugly code, but I can't find anything else that does quite what I +-- want (encodes the hierarchical module name without encoding the colon +-- that separates the package name from it.) +make_mid m = showSDoc $ + (text $ zEncodeString $ packageIdString $ modulePackageId m) + <> text ":" + <> (pprEncoded $ pprModuleName $ moduleName m) + where pprEncoded = pprCode CStyle + +make_qid :: Bool -> Bool -> Name -> C.Qual C.Id +make_qid force_unqual is_var n = (mname,make_id is_var n) where mname = case nameModule_maybe n of - Just m -> make_mid m - Nothing -> "" + Just m | not force_unqual -> make_mid m + _ -> "" -make_var_qid :: Name -> C.Qual C.Id -make_var_qid = make_qid True +make_var_qid :: Bool -> Name -> C.Qual C.Id +make_var_qid force_unqual = make_qid force_unqual True make_con_qid :: Name -> C.Qual C.Id -make_con_qid = make_qid False - +make_con_qid = make_qid False False + +------- +isALocal :: Name -> CoreM Bool +isALocal vName = do + modName <- ask + return $ case nameModule_maybe vName of + -- Not sure whether isInternalName corresponds to "local"ness + -- in the External Core sense; need to re-read the spec. + Just m | m == modName -> isInternalName vName + _ -> False \end{code}