%
% (c) The GRASP/AQUA Project, Glasgow University, 1993-1998
%
+
\section[MkIface]{Print an interface for a module}
\begin{code}
module MkIface (
- mkModDetails, mkModDetailsFromIface, completeIface,
- writeIface, pprIface
+ mkFinalIface,
+ pprModDetails, pprIface, pprUsage,
+ ifaceTyThing,
) where
#include "HsVersions.h"
import HsSyn
import HsCore ( HsIdInfo(..), UfExpr(..), toUfExpr, toUfBndr )
import HsTypes ( toHsTyVars )
-import BasicTypes ( Fixity(..), NewOrData(..),
- Version, initialVersion, bumpVersion, isLoopBreaker
+import TysPrim ( alphaTyVars )
+import BasicTypes ( NewOrData(..), Activation(..),
+ Version, initialVersion, bumpVersion
)
+import NewDemand ( isTopSig )
import RnMonad
import RnHsSyn ( RenamedInstDecl, RenamedTyClDecl )
-import TcHsSyn ( TypecheckedRuleDecl )
-import HscTypes ( VersionInfo(..), IfaceDecls(..), ModIface(..), ModDetails(..),
- TyThing(..), DFunId, TypeEnv, isTyClThing, Avails,
+import HscTypes ( VersionInfo(..), ModIface(..), ModDetails(..),
+ ModuleLocation(..), GhciMode(..), FixityEnv, lookupFixity,
+ IfaceDecls, mkIfaceDecls, dcl_tycl, dcl_rules, dcl_insts,
+ TyThing(..), DFunId, Avails, TypeEnv,
WhatsImported(..), GenAvailInfo(..),
- ImportVersion, AvailInfo, Deprecations(..)
+ ImportVersion, AvailInfo, Deprecations(..),
+ lookupVersion, typeEnvIds
)
import CmdLineOpts
-import Id ( Id, idType, idInfo, omitIfaceSigForId, isUserExportedId, hasNoBinding,
- idSpecialisation, idName, setIdInfo
+import Id ( idType, idInfo, isImplicitId, idCgInfo,
+ isLocalId, idName,
)
-import Var ( isId )
-import VarSet
-import DataCon ( StrictnessMark(..), dataConSig, dataConFieldLabels, dataConStrictMarks )
+import DataCon ( dataConId, dataConSig, dataConFieldLabels, dataConStrictMarks )
import IdInfo -- Lots
-import CoreSyn ( CoreExpr, CoreBind, Bind(..), CoreRule(..), IdCoreRule,
- isBuiltinRule, rulesRules, rulesRhsFreeVars, emptyCoreRules,
- bindersOfBinds
- )
-import CoreFVs ( exprSomeFreeVars, ruleSomeLhsFreeVars, ruleSomeFreeVars )
-import CoreUnfold ( okToUnfoldInHiFile, mkTopUnfolding, neverUnfold, unfoldingTemplate, noUnfolding )
-import Name ( isLocallyDefined, getName,
- Name, NamedThing(..)
- )
-import Name -- Env
+import Var ( Var )
+import CoreSyn ( CoreRule(..), IdCoreRule )
+import CoreFVs ( ruleLhsFreeNames )
+import CoreUnfold ( neverUnfold, unfoldingTemplate )
+import PprCore ( pprIdCoreRule )
+import Name ( getName, nameModule, toRdrName, isGlobalName,
+ nameIsLocalOrFrom, Name, NamedThing(..) )
+import NameEnv
+import NameSet
import OccName ( pprOccName )
-import TyCon ( TyCon, getSynTyConDefn, isSynTyCon, isNewTyCon, isAlgTyCon,
- tyConTheta, tyConTyVars, tyConDataCons, tyConFamilySize
- )
-import Class ( classExtraBigSig, DefMeth(..) )
+import TyCon
+import Class ( classExtraBigSig, classTyCon, DefMeth(..) )
import FieldLabel ( fieldLabelType )
-import Type ( splitSigmaTy, tidyTopType, deNoteType )
+import TcType ( tcSplitSigmaTy, tidyTopType, deNoteType, namesOfDFunHead )
import SrcLoc ( noSrcLoc )
import Outputable
import Module ( ModuleName )
+import Util ( sortLt, dropList )
+import ErrUtils ( dumpIfSet_dyn )
-import List ( partition )
+import Monad ( when )
+import Maybe ( catMaybes )
import IO ( IOMode(..), openFile, hClose )
\end{code}
%************************************************************************
%* *
-\subsection{Write a new interface file}
+\subsection{Completing an interface}
%* *
%************************************************************************
\begin{code}
-mkModDetails :: TypeEnv -> [DFunId] -- From typechecker
- -> [CoreBind] -> [Id] -- Final bindings, plus the top-level Ids from the
- -- code generator; they have authoritative arity info
- -> [IdCoreRule] -- Tidy orphan rules
- -> ModDetails
-mkModDetails type_env dfun_ids tidy_binds stg_ids orphan_rules
- = ModDetails { md_types = new_type_env,
- md_rules = rule_dcls,
- md_insts = dfun_ids }
- where
- -- The competed type environment is gotten from
- -- a) keeping the types and classes
- -- b) removing all Ids, and Ids with correct IdInfo
- -- gotten from the bindings
- -- From (b) we keep only those Ids with Global names, plus Ids
- -- accessible from them (notably via unfoldings)
- -- This truncates the type environment to include only the
- -- exported Ids and things needed from them, which saves space
- --
- -- However, we do keep things like constructors, which should not appear
- -- in interface files, because they are needed by importing modules when
- -- using the compilation manager
- new_type_env = mkNameEnv [(getName tycl, tycl) | tycl <- orig_type_env, isTyClThing tycl]
- `plusNameEnv`
- mkNameEnv [(idName id, AnId id) | id <- final_ids]
-
- orig_type_env = nameEnvElts type_env
-
- final_ids = bindsToIds (mkVarSet dfun_ids `unionVarSet` orphan_rule_ids)
- (mkVarSet stg_ids)
- tidy_binds
-
- -- The complete rules are gotten by combining
- -- a) the orphan rules
- -- b) rules embedded in the top-level Ids
- rule_dcls | opt_OmitInterfacePragmas = []
- | otherwise = getRules orphan_rules tidy_binds (mkVarSet final_ids)
-
- orphan_rule_ids = unionVarSets [ ruleSomeFreeVars interestingId rule
- | (_, rule) <- orphan_rules]
-
-
--- This version is used when we are re-linking a module
--- so we've only run the type checker on its previous interface
-mkModDetailsFromIface :: TypeEnv -> [DFunId] -- From typechecker
- -> [TypecheckedRuleDecl]
- -> ModDetails
-mkModDetailsFromIface type_env dfun_ids rules
- = ModDetails { md_types = type_env,
- md_rules = rule_dcls,
- md_insts = dfun_ids }
+
+
+
+mkFinalIface :: GhciMode
+ -> DynFlags
+ -> ModuleLocation
+ -> Maybe ModIface -- The old interface, if we have it
+ -> ModIface -- The new one, minus the decls and versions
+ -> ModDetails -- The ModDetails for this module
+ -> IO ModIface -- The new one, complete with decls and versions
+-- mkFinalIface
+-- a) completes the interface
+-- b) writes it out to a file if necessary
+
+mkFinalIface ghci_mode dflags location maybe_old_iface
+ new_iface@ModIface{ mi_module=mod }
+ new_details@ModDetails{ md_insts=insts,
+ md_rules=rules,
+ md_types=types }
+ = do {
+ -- Add the new declarations, and the is-orphan flag
+ let iface_w_decls = new_iface { mi_decls = new_decls,
+ mi_orphan = orphan_mod }
+
+ -- Add version information
+ ; let (final_iface, maybe_diffs) = _scc_ "versioninfo" addVersionInfo maybe_old_iface iface_w_decls
+
+ -- Write the interface file, if necessary
+ ; when (must_write_hi_file maybe_diffs)
+ (writeIface hi_file_path final_iface)
+
+ -- Debug printing
+ ; write_diffs dflags final_iface maybe_diffs
+
+ ; orphan_mod `seq`
+ return final_iface }
+
where
- rule_dcls = [(id,rule) | IfaceRuleOut id rule <- rules]
- -- All the rules from an interface are of the IfaceRuleOut form
-
-
-completeIface :: Maybe ModIface -- The old interface, if we have it
- -> ModIface -- The new one, minus the decls and versions
- -> ModDetails -- The ModDetails for this module
- -> (ModIface, Maybe SDoc) -- The new one, complete with decls and versions
- -- The SDoc is a debug document giving differences
- -- Nothing => no change
-
- -- NB: 'Nothing' means that even the usages havn't changed, so there's no
- -- need to write a new interface file. But even if the usages have
- -- changed, the module version may not have.
-completeIface maybe_old_iface new_iface mod_details
- = addVersionInfo maybe_old_iface (new_iface { mi_decls = new_decls })
+ must_write_hi_file Nothing = False
+ must_write_hi_file (Just _diffs) = ghci_mode /= Interactive
+ -- We must write a new .hi file if there are some changes
+ -- and we're not in interactive mode
+ -- maybe_diffs = 'Nothing' means that even the usages havn't changed,
+ -- so there's no need to write a new interface file. But even if
+ -- the usages have changed, the module version may not have.
+
+ hi_file_path = ml_hi_file location
+ new_decls = mkIfaceDecls ty_cls_dcls rule_dcls inst_dcls
+ inst_dcls = map ifaceInstance insts
+ ty_cls_dcls = foldNameEnv ifaceTyThing_acc [] types
+ rule_dcls = map ifaceRule rules
+ orphan_mod = isOrphanModule mod new_details
+
+write_diffs :: DynFlags -> ModIface -> Maybe SDoc -> IO ()
+write_diffs dflags new_iface Nothing
+ = do when (dopt Opt_D_dump_hi_diffs dflags) (printDump (text "INTERFACE UNCHANGED"))
+ dumpIfSet_dyn dflags Opt_D_dump_hi "UNCHANGED FINAL INTERFACE" (pprIface new_iface)
+
+write_diffs dflags new_iface (Just sdoc_diffs)
+ = do dumpIfSet_dyn dflags Opt_D_dump_hi_diffs "INTERFACE HAS CHANGED" sdoc_diffs
+ dumpIfSet_dyn dflags Opt_D_dump_hi "NEW FINAL INTERFACE" (pprIface new_iface)
+\end{code}
+
+\begin{code}
+isOrphanModule :: Module -> ModDetails -> Bool
+isOrphanModule this_mod (ModDetails {md_insts = insts, md_rules = rules})
+ = any orphan_inst insts || any orphan_rule rules
where
- new_decls = IfaceDecls { dcl_tycl = ty_cls_dcls,
- dcl_insts = inst_dcls,
- dcl_rules = rule_dcls }
+ -- A rule is an orphan if the LHS mentions nothing defined locally
+ orphan_inst dfun_id = no_locals (namesOfDFunHead (idType dfun_id))
+ -- A instance is an orphan if its head mentions nothing defined locally
+ orphan_rule rule = no_locals (ruleLhsFreeNames rule)
- inst_dcls = map ifaceInstance (md_insts mod_details)
- ty_cls_dcls = foldNameEnv ifaceTyCls [] (md_types mod_details)
- rule_dcls = map ifaceRule (md_rules mod_details)
+ no_locals names = isEmptyNameSet (filterNameSet (nameIsLocalOrFrom this_mod) names)
\end{code}
+Implicit Ids and class tycons aren't included in interface files, so
+we miss them out of the accumulating parameter here.
-%************************************************************************
-%* *
-\subsection{Types and classes}
-%* *
-%************************************************************************
+\begin{code}
+ifaceTyThing_acc :: TyThing -> [RenamedTyClDecl] -> [RenamedTyClDecl]
+ifaceTyThing_acc (AnId id) so_far | isImplicitId id = so_far
+ifaceTyThing_acc (ATyCon id) so_far | isClassTyCon id = so_far
+ifaceTyThing_acc other so_far = ifaceTyThing other : so_far
+\end{code}
+
+Convert *any* TyThing into a RenamedTyClDecl. Used both for
+generating interface files and for the ':info' command in GHCi.
\begin{code}
-ifaceTyCls :: TyThing -> [RenamedTyClDecl] -> [RenamedTyClDecl]
-ifaceTyCls (AClass clas) so_far
- = cls_decl : so_far
+ifaceTyThing :: TyThing -> RenamedTyClDecl
+ifaceTyThing (AClass clas) = cls_decl
where
- cls_decl = ClassDecl (toHsContext sc_theta)
- (getName clas)
- (toHsTyVars clas_tyvars)
- (toHsFDs clas_fds)
- (map toClassOpSig op_stuff)
- EmptyMonoBinds
- [] noSrcLoc
-
- (clas_tyvars, clas_fds, sc_theta, _, op_stuff) = classExtraBigSig clas
+ cls_decl = ClassDecl { tcdCtxt = toHsContext sc_theta,
+ tcdName = getName clas,
+ tcdTyVars = toHsTyVars clas_tyvars,
+ tcdFDs = toHsFDs clas_fds,
+ tcdSigs = map toClassOpSig op_stuff,
+ tcdMeths = Nothing,
+ tcdSysNames = sys_names,
+ tcdLoc = noSrcLoc }
+
+ (clas_tyvars, clas_fds, sc_theta, sc_sels, op_stuff) = classExtraBigSig clas
+ tycon = classTyCon clas
+ data_con = head (tyConDataCons tycon)
+ sys_names = mkClassDeclSysNames (getName tycon, getName data_con,
+ getName (dataConId data_con), map getName sc_sels)
toClassOpSig (sel_id, def_meth)
= ASSERT(sel_tyvars == clas_tyvars)
- ClassOpSig (getName sel_id) (Just def_meth') (toHsType op_ty) noSrcLoc
+ ClassOpSig (getName sel_id) def_meth' (toHsType op_ty) noSrcLoc
where
- (sel_tyvars, _, op_ty) = splitSigmaTy (idType sel_id)
+ (sel_tyvars, _, op_ty) = tcSplitSigmaTy (idType sel_id)
def_meth' = case def_meth of
NoDefMeth -> NoDefMeth
GenDefMeth -> GenDefMeth
DefMeth id -> DefMeth (getName id)
-ifaceTyCls (ATyCon tycon) so_far
- = ty_decl : so_far
-
+ifaceTyThing (ATyCon tycon) = ty_decl
where
ty_decl | isSynTyCon tycon
- = TySynonym (getName tycon)(toHsTyVars tyvars)
- (toHsType syn_ty) noSrcLoc
+ = TySynonym { tcdName = getName tycon,
+ tcdTyVars = toHsTyVars tyvars,
+ tcdSynRhs = toHsType syn_ty,
+ tcdLoc = noSrcLoc }
| isAlgTyCon tycon
- = TyData new_or_data (toHsContext (tyConTheta tycon))
- (getName tycon)
- (toHsTyVars tyvars)
- (map ifaceConDecl (tyConDataCons tycon))
- (tyConFamilySize tycon)
- Nothing noSrcLoc (panic "gen1") (panic "gen2")
-
- | otherwise = pprPanic "ifaceTyCls" (ppr tycon)
+ = TyData { tcdND = new_or_data,
+ tcdCtxt = toHsContext (tyConTheta tycon),
+ tcdName = getName tycon,
+ tcdTyVars = toHsTyVars tyvars,
+ tcdCons = ifaceConDecls (tyConDataConDetails tycon),
+ tcdDerivs = Nothing,
+ tcdSysNames = map getName (tyConGenIds tycon),
+ tcdLoc = noSrcLoc }
+
+ | isForeignTyCon tycon
+ = ForeignType { tcdName = getName tycon,
+ tcdExtName = Nothing,
+ tcdFoType = DNType, -- The only case at present
+ tcdLoc = noSrcLoc }
+
+ | isPrimTyCon tycon || isFunTyCon tycon
+ -- needed in GHCi for ':info Int#', for example
+ = TyData { tcdND = DataType,
+ tcdCtxt = [],
+ tcdName = getName tycon,
+ tcdTyVars = toHsTyVars (take (tyConArity tycon) alphaTyVars),
+ tcdCons = Unknown,
+ tcdDerivs = Nothing,
+ tcdSysNames = [],
+ tcdLoc = noSrcLoc }
+
+ | otherwise = pprPanic "ifaceTyThing" (ppr tycon)
tyvars = tyConTyVars tycon
(_, syn_ty) = getSynTyConDefn tycon
new_or_data | isNewTyCon tycon = NewType
| otherwise = DataType
+ ifaceConDecls Unknown = Unknown
+ ifaceConDecls (HasCons n) = HasCons n
+ ifaceConDecls (DataCons cs) = DataCons (map ifaceConDecl cs)
+
ifaceConDecl data_con
- = ConDecl (getName data_con) (error "ifaceConDecl")
+ = ConDecl (getName data_con) (getName (dataConId data_con))
(toHsTyVars ex_tyvars)
(toHsContext ex_theta)
details noSrcLoc
where
(tyvars1, _, ex_tyvars, ex_theta, arg_tys, tycon1) = dataConSig data_con
field_labels = dataConFieldLabels data_con
- strict_marks = dataConStrictMarks data_con
+ strict_marks = dropList ex_theta (dataConStrictMarks data_con)
+ -- The 'drop' is because dataConStrictMarks
+ -- includes the existential dictionaries
details | null field_labels
= ASSERT( tycon == tycon1 && tyvars == tyvars1 )
- VanillaCon (zipWith mk_bang_ty strict_marks arg_tys)
+ VanillaCon (zipWith BangType strict_marks (map toHsType arg_tys))
| otherwise
= RecCon (zipWith mk_field strict_marks field_labels)
- mk_bang_ty NotMarkedStrict ty = Unbanged (toHsType ty)
- mk_bang_ty (MarkedUnboxed _ _) ty = Unpacked (toHsType ty)
- mk_bang_ty MarkedStrict ty = Banged (toHsType ty)
-
mk_field strict_mark field_label
- = ([getName field_label], mk_bang_ty strict_mark (fieldLabelType field_label))
-
-ifaceTyCls (ATyCon tycon) so_far = pprPanic "ifaceTyCls" (ppr tycon)
+ = ([getName field_label], BangType strict_mark (toHsType (fieldLabelType field_label)))
-ifaceTyCls (AnId id) so_far
- | omitIfaceSigForId id = so_far
- | otherwise = iface_sig : so_far
+ifaceTyThing (AnId id) = iface_sig
where
- iface_sig = IfaceSig (getName id) (toHsType id_type) hs_idinfo noSrcLoc
+ iface_sig = IfaceSig { tcdName = getName id,
+ tcdType = toHsType id_type,
+ tcdIdInfo = hs_idinfo,
+ tcdLoc = noSrcLoc }
id_type = idType id
id_info = idInfo id
+ cg_info = idCgInfo id
+ arity_info = arityInfo id_info
+ caf_info = cgCafInfo cg_info
- hs_idinfo | opt_OmitInterfacePragmas = []
- | otherwise = arity_hsinfo ++ caf_hsinfo ++ cpr_hsinfo ++
- strict_hsinfo ++ wrkr_hsinfo ++ unfold_hsinfo
+ hs_idinfo | opt_OmitInterfacePragmas
+ = []
+ | otherwise
+ = catMaybes [arity_hsinfo, caf_hsinfo,
+ strict_hsinfo, wrkr_hsinfo,
+ unfold_hsinfo]
------------ Arity --------------
- arity_hsinfo = case arityInfo id_info of
- a@(ArityExactly n) -> [HsArity a]
- other -> []
+ arity_hsinfo | arity_info == 0 = Nothing
+ | otherwise = Just (HsArity arity_info)
------------ Caf Info --------------
- caf_hsinfo = case cafInfo id_info of
- NoCafRefs -> [HsNoCafRefs]
- otherwise -> []
-
- ------------ CPR Info --------------
- cpr_hsinfo = case cprInfo id_info of
- ReturnsCPR -> [HsCprInfo]
- NoCPRInfo -> []
+ caf_hsinfo = case caf_info of
+ NoCafRefs -> Just HsNoCafRefs
+ _other -> Nothing
------------ Strictness --------------
- strict_hsinfo = case strictnessInfo id_info of
- NoStrictnessInfo -> []
- info -> [HsStrictness info]
-
+ -- No point in explicitly exporting TopSig
+ strict_hsinfo = case newStrictnessInfo id_info of
+ Just sig | not (isTopSig sig) -> Just (HsStrictness sig)
+ _other -> Nothing
------------ Worker --------------
- wrkr_hsinfo = case workerInfo id_info of
- HasWorker work_id wrap_arity -> [HsWorker (getName work_id)]
- NoWorker -> []
+ work_info = workerInfo id_info
+ has_worker = case work_info of { HasWorker _ _ -> True; other -> False }
+ wrkr_hsinfo = case work_info of
+ HasWorker work_id wrap_arity ->
+ Just (HsWorker (getName work_id) wrap_arity)
+ NoWorker -> Nothing
------------ Unfolding --------------
+ -- The unfolding is redundant if there is a worker
unfold_info = unfoldingInfo id_info
inline_prag = inlinePragInfo id_info
rhs = unfoldingTemplate unfold_info
- unfold_hsinfo | neverUnfold unfold_info = []
- | otherwise = [HsUnfold inline_prag (toUfExpr rhs)]
+ unfold_hsinfo | neverUnfold unfold_info
+ || has_worker = Nothing
+ | otherwise = Just (HsUnfold inline_prag (toUfExpr rhs))
\end{code}
-
-%************************************************************************
-%* *
-\subsection{Instances and rules}
-%* *
-%************************************************************************
-
\begin{code}
ifaceInstance :: DFunId -> RenamedInstDecl
ifaceInstance dfun_id
-- and this instance decl wouldn't get imported into a module
-- that mentioned T but not Tibble.
-ifaceRule (id, BuiltinRule _)
+ifaceRule :: IdCoreRule -> RuleDecl Name pat
+ifaceRule (id, BuiltinRule _ _)
= pprTrace "toHsRule: builtin" (ppr id) (bogusIfaceRule id)
-ifaceRule (id, Rule name bndrs args rhs)
- = IfaceRule name (map toUfBndr bndrs) (getName id)
+ifaceRule (id, Rule name act bndrs args rhs)
+ = IfaceRule name act (map toUfBndr bndrs) (getName id)
(map toUfExpr args) (toUfExpr rhs) noSrcLoc
+bogusIfaceRule :: (NamedThing a) => a -> RuleDecl Name pat
bogusIfaceRule id
- = IfaceRule SLIT("bogus") [] (getName id) [] (UfVar (getName id)) noSrcLoc
-\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Compute final Ids}
-%* *
-%************************************************************************
-
-A "final Id" has exactly the IdInfo for going into an interface file, or
-exporting to another module.
-
-\begin{code}
-bindsToIds :: IdSet -- These Ids are needed already
- -> IdSet -- Ids used at code-gen time; they have better pragma info!
- -> [CoreBind] -- In dependency order, later depend on earlier
- -> [Id] -- Set of Ids actually spat out, complete with exactly the IdInfo
- -- they need for exporting to another module
-
-bindsToIds needed_ids codegen_ids binds
- = go needed_ids (reverse binds) []
- -- Reverse so that later things will
- -- provoke earlier ones to be emitted
- where
- -- The 'needed' set contains the Ids that are needed by earlier
- -- interface file emissions. If the Id isn't in this set, and isn't
- -- exported, there's no need to emit anything
- need_id needed_set id = id `elemVarSet` needed_set || isUserExportedId id
-
- go needed [] emitted
- | not (isEmptyVarSet needed) = pprTrace "ifaceBinds: free vars:"
- (sep (map ppr (varSetElems needed)))
- emitted
- | otherwise = emitted
-
- go needed (NonRec id rhs : binds) emitted
- | need_id needed id = go new_needed binds (new_id:emitted)
- | otherwise = go needed binds emitted
- where
- (new_id, extras) = mkFinalId codegen_ids False id rhs
- new_needed = (needed `unionVarSet` extras) `delVarSet` id
-
- -- Recursive groups are a bit more of a pain. We may only need one to
- -- start with, but it may call out the next one, and so on. So we
- -- have to look for a fixed point. We don't want necessarily them all,
- -- because without -O we may only need the first one (if we don't emit
- -- its unfolding)
- go needed (Rec pairs : binds) emitted
- = go needed' binds emitted'
- where
- (new_emitted, extras) = go_rec needed pairs
- needed' = (needed `unionVarSet` extras) `minusVarSet` mkVarSet (map fst pairs)
- emitted' = new_emitted ++ emitted
-
- go_rec :: IdSet -> [(Id,CoreExpr)] -> ([Id], IdSet)
- go_rec needed pairs
- | null needed_prs = ([], emptyVarSet)
- | otherwise = (emitted ++ more_emitted,
- extras `unionVarSet` more_extras)
- where
- (needed_prs,leftover_prs) = partition is_needed pairs
- (emitted, extras_s) = unzip [ mkFinalId codegen_ids True id rhs
- | (id,rhs) <- needed_prs, not (omitIfaceSigForId id)]
- extras = unionVarSets extras_s
- (more_emitted, more_extras) = go_rec extras leftover_prs
-
- is_needed (id,_) = need_id needed id
-\end{code}
-
-
-
-\begin{code}
-mkFinalId :: IdSet -- The Ids with arity info from the code generator
- -> Bool -- True <=> recursive, so don't include unfolding
- -> Id
- -> CoreExpr -- The Id's right hand side
- -> (Id, IdSet) -- The emitted id, plus any *extra* needed Ids
-
-mkFinalId codegen_ids is_rec id rhs
- | omitIfaceSigForId id
- = (id, emptyVarSet) -- An optimisation for top-level constructors and suchlike
- | otherwise
- = (id `setIdInfo` new_idinfo, new_needed_ids)
- where
- core_idinfo = idInfo id
- stg_idinfo = case lookupVarSet codegen_ids id of
- Just id' -> idInfo id'
- Nothing -> pprTrace "ifaceBinds not found:" (ppr id) $
- idInfo id
-
- new_idinfo | opt_OmitInterfacePragmas
- = vanillaIdInfo
- | otherwise
- = core_idinfo `setArityInfo` arity_info
- `setCafInfo` cafInfo stg_idinfo
- `setUnfoldingInfo` unfold_info
- `setWorkerInfo` worker_info
- `setSpecInfo` emptyCoreRules
- -- We zap the specialisations because they are
- -- passed on separately through the modules IdCoreRules
-
- ------------ Arity --------------
- arity_info = arityInfo stg_idinfo
- stg_arity = arityLowerBound arity_info
-
- ------------ Worker --------------
- -- We only treat a function as having a worker if
- -- the exported arity (which is now the number of visible lambdas)
- -- is the same as the arity at the moment of the w/w split
- -- If so, we can safely omit the unfolding inside the wrapper, and
- -- instead re-generate it from the type/arity/strictness info
- -- But if the arity has changed, we just take the simple path and
- -- put the unfolding into the interface file, forgetting the fact
- -- that it's a wrapper.
- --
- -- How can this happen? Sometimes we get
- -- f = coerce t (\x y -> $wf x y)
- -- at the moment of w/w split; but the eta reducer turns it into
- -- f = coerce t $wf
- -- which is perfectly fine except that the exposed arity so far as
- -- the code generator is concerned (zero) differs from the arity
- -- when we did the split (2).
- --
- -- All this arises because we use 'arity' to mean "exactly how many
- -- top level lambdas are there" in interface files; but during the
- -- compilation of this module it means "how many things can I apply
- -- this to".
- worker_info = case workerInfo core_idinfo of
- info@(HasWorker work_id wrap_arity)
- | wrap_arity == stg_arity -> info
- | otherwise -> pprTrace "ifaceId: arity change:" (ppr id)
- NoWorker
- NoWorker -> NoWorker
-
- has_worker = case worker_info of
- HasWorker _ _ -> True
- other -> False
-
- HasWorker work_id _ = worker_info
-
- ------------ Unfolding --------------
- inline_pragma = inlinePragInfo core_idinfo
- dont_inline = isNeverInlinePrag inline_pragma
- loop_breaker = isLoopBreaker (occInfo core_idinfo)
- bottoming_fn = isBottomingStrictness (strictnessInfo core_idinfo)
-
- unfolding = mkTopUnfolding rhs
- rhs_is_small = neverUnfold unfolding
-
- unfold_info | show_unfold = unfolding
- | otherwise = noUnfolding
-
- show_unfold = not has_worker && -- Not unnecessary
- not bottoming_fn && -- Not necessary
- not dont_inline &&
- not loop_breaker &&
- rhs_is_small && -- Small enough
- okToUnfoldInHiFile rhs -- No casms etc
-
-
- ------------ Extra free Ids --------------
- new_needed_ids | opt_OmitInterfacePragmas = emptyVarSet
- | otherwise = worker_ids `unionVarSet`
- unfold_ids `unionVarSet`
- spec_ids
-
- spec_ids = filterVarSet interestingId (rulesRhsFreeVars (specInfo core_idinfo))
-
- worker_ids | has_worker && interestingId work_id = unitVarSet work_id
- -- Conceivably, the worker might come from
- -- another module
- | otherwise = emptyVarSet
-
- unfold_ids | show_unfold = find_fvs rhs
- | otherwise = emptyVarSet
-
- find_fvs expr = exprSomeFreeVars interestingId expr
-
-interestingId id = isId id && isLocallyDefined id && not (hasNoBinding id)
-\end{code}
-
-
-\begin{code}
-getRules :: [IdCoreRule] -- Orphan rules
- -> [CoreBind] -- Bindings, with rules in the top-level Ids
- -> IdSet -- Ids that are exported, so we need their rules
- -> [IdCoreRule]
-getRules orphan_rules binds emitted
- = orphan_rules ++ local_rules
- where
- local_rules = [ (fn, rule)
- | fn <- bindersOfBinds binds,
- fn `elemVarSet` emitted,
- rule <- rulesRules (idSpecialisation fn),
- not (isBuiltinRule rule),
- -- We can't print builtin rules in interface files
- -- Since they are built in, an importing module
- -- will have access to them anyway
-
- -- Sept 00: I've disabled this test. It doesn't stop many, if any, rules
- -- from coming out, and to make it work properly we need to add ????
- -- (put it back in for now)
- all (`elemVarSet` emitted) (varSetElems (ruleSomeLhsFreeVars interestingId rule))
- -- Spit out a rule only if all its lhs free vars are emitted
- -- This is a good reason not to do it when we emit the Id itself
- ]
+ = IfaceRule SLIT("bogus") NeverActive [] (getName id) [] (UfVar (getName id)) noSrcLoc
\end{code}
-- No old interface, so definitely write a new one!
= (new_iface, Just (text "No old interface available"))
-addVersionInfo (Just old_iface@(ModIface { mi_version = old_version,
- mi_decls = old_decls,
- mi_fixities = old_fixities }))
- new_iface@(ModIface { mi_decls = new_decls,
- mi_fixities = new_fixities })
+addVersionInfo (Just old_iface@(ModIface { mi_version = old_version,
+ mi_decls = old_decls,
+ mi_fixities = old_fixities,
+ mi_deprecs = old_deprecs }))
+ new_iface@(ModIface { mi_decls = new_decls,
+ mi_fixities = new_fixities,
+ mi_deprecs = new_deprecs })
| no_output_change && no_usage_change
- = (old_iface, Nothing)
+ = (new_iface, Nothing)
+ -- don't return the old iface because it may not have an
+ -- mi_globals field set to anything reasonable.
| otherwise -- Add updated version numbers
- = (final_iface, Just pp_tc_diffs)
+ = --pprTrace "completeIface" (ppr (dcl_tycl old_decls))
+ (final_iface, Just pp_diffs)
where
final_iface = new_iface { mi_version = new_version }
- new_version = VersionInfo { vers_module = bumpVersion no_output_change (vers_module old_version),
+ old_mod_vers = vers_module old_version
+ new_version = VersionInfo { vers_module = bumpVersion no_output_change old_mod_vers,
vers_exports = bumpVersion no_export_change (vers_exports old_version),
vers_rules = bumpVersion no_rule_change (vers_rules old_version),
vers_decls = tc_vers }
- no_output_change = no_tc_change && no_rule_change && no_export_change
+ no_output_change = no_tc_change && no_rule_change && no_export_change && no_deprec_change
no_usage_change = mi_usages old_iface == mi_usages new_iface
no_export_change = mi_exports old_iface == mi_exports new_iface -- Kept sorted
no_rule_change = dcl_rules old_decls == dcl_rules new_decls -- Ditto
+ no_deprec_change = old_deprecs == new_deprecs
-- Fill in the version number on the new declarations by looking at the old declarations.
-- Set the flag if anything changes.
-- Assumes that the decls are sorted by hsDeclName.
- old_vers_decls = vers_decls old_version
- (no_tc_change, pp_tc_diffs, tc_vers) = diffDecls old_vers_decls old_fixities new_fixities
+ (no_tc_change, pp_tc_diffs, tc_vers) = diffDecls old_version old_fixities new_fixities
(dcl_tycl old_decls) (dcl_tycl new_decls)
-
-
-
-diffDecls :: NameEnv Version -- Old version map
- -> NameEnv Fixity -> NameEnv Fixity -- Old and new fixities
+ pp_diffs = vcat [pp_tc_diffs,
+ pp_change no_export_change "Export list",
+ pp_change no_rule_change "Rules",
+ pp_change no_deprec_change "Deprecations",
+ pp_change no_usage_change "Usages"]
+ pp_change True what = empty
+ pp_change False what = text what <+> ptext SLIT("changed")
+
+diffDecls :: VersionInfo -- Old version
+ -> FixityEnv -> FixityEnv -- Old and new fixities
-> [RenamedTyClDecl] -> [RenamedTyClDecl] -- Old and new decls
-> (Bool, -- True <=> no change
SDoc, -- Record of differences
- NameEnv Version) -- New version
+ NameEnv Version) -- New version map
-diffDecls old_vers old_fixities new_fixities old new
+diffDecls (VersionInfo { vers_module = old_mod_vers, vers_decls = old_decls_vers })
+ old_fixities new_fixities old new
= diff True empty emptyNameEnv old new
where
-- When seeing if two decls are the same,
-- remember to check whether any relevant fixity has changed
eq_tc d1 d2 = d1 == d2 && all (same_fixity . fst) (tyClDeclNames d1)
- same_fixity n = lookupNameEnv old_fixities n == lookupNameEnv new_fixities n
+ same_fixity n = lookupFixity old_fixities n == lookupFixity new_fixities n
diff ok_so_far pp new_vers [] [] = (ok_so_far, pp, new_vers)
- diff ok_so_far pp new_vers old [] = (False, pp, new_vers)
- diff ok_so_far pp new_vers [] (nd:nds) = diff False (pp $$ only_new nd) new_vers [] nds
+ diff ok_so_far pp new_vers (od:ods) [] = diff False (pp $$ only_old od) new_vers ods []
+ diff ok_so_far pp new_vers [] (nd:nds) = diff False (pp $$ only_new nd) new_vers_with_new [] nds
+ where
+ new_vers_with_new = extendNameEnv new_vers (tyClDeclName nd) (bumpVersion False old_mod_vers)
+ -- When adding a new item, start from the old module version
+ -- This way, if you have version 4 of f, then delete f, then add f again,
+ -- you'll get version 6 of f, which will (correctly) force recompilation of
+ -- clients
+
diff ok_so_far pp new_vers (od:ods) (nd:nds)
= case od_name `compare` nd_name of
LT -> diff False (pp $$ only_old od) new_vers ods (nd:nds)
GT -> diff False (pp $$ only_new nd) new_vers (od:ods) nds
- EQ | od `eq_tc` nd -> diff ok_so_far pp new_vers ods nds
- | otherwise -> diff False (pp $$ changed od nd) new_vers' ods nds
+ EQ | od `eq_tc` nd -> diff ok_so_far pp new_vers ods nds
+ | otherwise -> diff False (pp $$ changed od nd) new_vers_with_diff ods nds
where
od_name = tyClDeclName od
nd_name = tyClDeclName nd
- new_vers' = extendNameEnv new_vers nd_name
- (bumpVersion True (lookupNameEnv_NF old_vers od_name))
+ new_vers_with_diff = extendNameEnv new_vers nd_name (bumpVersion False old_version)
+ old_version = lookupVersion old_decls_vers od_name
- only_old d = ptext SLIT("Only in old iface:") <+> ppr d
- only_new d = ptext SLIT("Only in new iface:") <+> ppr d
- changed d nd = ptext SLIT("Changed in iface: ") <+> ((ptext SLIT("Old:") <+> ppr d) $$
- (ptext SLIT("New:") <+> ppr nd))
+ only_old d = ptext SLIT("Only in old iface:") <+> ppr d
+ only_new d = ptext SLIT("Only in new iface:") <+> ppr d
+ changed od nd = ptext SLIT("Changed in iface: ") <+> ((ptext SLIT("Old:") <+> ppr od) $$
+ (ptext SLIT("New:") <+> ppr nd))
\end{code}
%************************************************************************
%* *
+\subsection{Writing ModDetails}
+%* *
+%************************************************************************
+
+\begin{code}
+pprModDetails :: ModDetails -> SDoc
+pprModDetails (ModDetails { md_types = type_env, md_insts = dfun_ids, md_rules = rules })
+ = vcat [ dump_types dfun_ids type_env
+ , dump_insts dfun_ids
+ , dump_rules rules]
+
+dump_types :: [Var] -> TypeEnv -> SDoc
+dump_types dfun_ids type_env
+ = text "TYPE SIGNATURES" $$ nest 4 (dump_sigs ids)
+ where
+ ids = [id | id <- typeEnvIds type_env, want_sig id]
+ want_sig id | opt_PprStyle_Debug = True
+ | otherwise = isLocalId id &&
+ isGlobalName (idName id) &&
+ not (id `elem` dfun_ids)
+ -- isLocalId ignores data constructors, records selectors etc
+ -- The isGlobalName ignores local dictionary and method bindings
+ -- that the type checker has invented. User-defined things have
+ -- Global names.
+
+dump_insts :: [Var] -> SDoc
+dump_insts [] = empty
+dump_insts dfun_ids = text "INSTANCES" $$ nest 4 (dump_sigs dfun_ids)
+
+dump_sigs :: [Var] -> SDoc
+dump_sigs ids
+ -- Print type signatures
+ -- Convert to HsType so that we get source-language style printing
+ -- And sort by RdrName
+ = vcat $ map ppr_sig $ sortLt lt_sig $
+ [ (toRdrName id, toHsType (idType id))
+ | id <- ids ]
+ where
+ lt_sig (n1,_) (n2,_) = n1 < n2
+ ppr_sig (n,t) = ppr n <+> dcolon <+> ppr t
+
+dump_rules :: [IdCoreRule] -> SDoc
+dump_rules [] = empty
+dump_rules rs = vcat [ptext SLIT("{-# RULES"),
+ nest 4 (vcat (map pprIdCoreRule rs)),
+ ptext SLIT("#-}")]
+\end{code}
+
+
+%************************************************************************
+%* *
\subsection{Writing an interface file}
%* *
%************************************************************************
writeIface :: FilePath -> ModIface -> IO ()
writeIface hi_path mod_iface
= do { if_hdl <- openFile hi_path WriteMode
- ; printForIface if_hdl (pprIface mod_iface)
+ ; printForIface if_hdl from_this_mod (pprIface mod_iface)
; hClose if_hdl
}
+ where
+ -- Print names unqualified if they are from this module
+ from_this_mod n = nameModule n == this_mod
+ this_mod = mi_module mod_iface
pprIface :: ModIface -> SDoc
pprIface iface
= vcat [ ptext SLIT("__interface")
- <+> doubleQuotes (ptext opt_InPackage)
+ <+> doubleQuotes (ptext (mi_package iface))
<+> ppr (mi_module iface) <+> ppr (vers_module version_info)
<+> pp_sub_vers
<+> (if mi_orphan iface then char '!' else empty)
, pprFixities (mi_fixities iface) (dcl_tycl decls)
, pprIfaceDecls (vers_decls version_info) decls
- , pprDeprecs (mi_deprecs iface)
+ , pprRulesAndDeprecs (dcl_rules decls) (mi_deprecs iface)
]
where
version_info = mi_version iface
pprExport (mod, items)
= hsep [ ptext SLIT("__export "), ppr mod, hsep (map pp_avail items) ] <> semi
where
- ppr_name :: Name -> SDoc -- Print the occurrence name only
- ppr_name n = ppr (nameOccName n)
-
pp_avail :: AvailInfo -> SDoc
- pp_avail (Avail name) = ppr_name name
- pp_avail (AvailTC name []) = empty
- pp_avail (AvailTC name ns) = hcat [ppr_name name, bang, pp_export ns']
- where
- bang | name `elem` ns = empty
- | otherwise = char '|'
- ns' = filter (/= name) ns
+ pp_avail (Avail name) = pprOcc name
+ pp_avail (AvailTC _ []) = empty
+ pp_avail (AvailTC n (n':ns)) | n==n' = pprOcc n <> pp_export ns
+ | otherwise = pprOcc n <> char '|' <> pp_export (n':ns)
pp_export [] = empty
- pp_export names = braces (hsep (map ppr_name names))
+ pp_export names = braces (hsep (map pprOcc names))
+
+pprOcc :: Name -> SDoc -- Print the occurrence name only
+pprOcc n = pprOccName (nameOccName n)
\end{code}
pp_versions NothingAtAll = empty
pp_versions (Everything v) = dcolon <+> int v
pp_versions (Specifically vm ve nvs vr) = dcolon <+> int vm <+> pp_export_version ve <+> int vr
- <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
+ <+> hsep [ pprOcc n <+> int v | (n,v) <- nvs ]
- -- HACK for the moment: print the export-list version even if
- -- we don't use it, so that syntax of interface files doesn't change
- pp_export_version Nothing = int 1
+ pp_export_version Nothing = empty
pp_export_version (Just v) = int v
\end{code}
\begin{code}
+pprIfaceDecls :: NameEnv Int -> IfaceDecls -> SDoc
pprIfaceDecls version_map decls
= vcat [ vcat [ppr i <+> semi | i <- dcl_insts decls]
, vcat (map ppr_decl (dcl_tycl decls))
- , pprRules (dcl_rules decls)
]
where
ppr_decl d = ppr_vers d <+> ppr d <> semi
\end{code}
\begin{code}
+pprFixities :: (Outputable a)
+ => NameEnv a
+ -> [TyClDecl Name pat]
+ -> SDoc
pprFixities fixity_map decls
= hsep [ ppr fix <+> ppr n
| d <- decls,
(n,_) <- tyClDeclNames d,
Just fix <- [lookupNameEnv fixity_map n]] <> semi
-pprRules [] = empty
-pprRules rules = hsep [ptext SLIT("{-## __R"), vcat (map ppr rules), ptext SLIT("##-}")]
-
-pprDeprecs NoDeprecs = empty
-pprDeprecs deprecs = ptext SLIT("{-## __D") <+> guts <+> ptext SLIT("##-}")
- where
- guts = case deprecs of
- DeprecAll txt -> ptext txt
- DeprecSome env -> pp_deprecs env
-
-pp_deprecs env = vcat (punctuate semi (map pp_deprec (nameEnvElts env)))
- where
- pp_deprec (name, txt) = pprOccName (nameOccName name) <+> ptext txt
+-- Disgusting to print these two together, but that's
+-- the way the interface parser currently expects them.
+pprRulesAndDeprecs :: (Outputable a) => [a] -> Deprecations -> SDoc
+pprRulesAndDeprecs [] NoDeprecs = empty
+pprRulesAndDeprecs rules deprecs
+ = ptext SLIT("{-##") <+> (pp_rules rules $$ pp_deprecs deprecs) <+> ptext SLIT("##-}")
+ where
+ pp_rules [] = empty
+ pp_rules rules = ptext SLIT("__R") <+> vcat (map ppr rules)
+
+ pp_deprecs NoDeprecs = empty
+ pp_deprecs deprecs = ptext SLIT("__D") <+> guts
+ where
+ guts = case deprecs of
+ DeprecAll txt -> doubleQuotes (ptext txt)
+ DeprecSome env -> ppr_deprec_env env
+
+ppr_deprec_env :: NameEnv (Name, FAST_STRING) -> SDoc
+ppr_deprec_env env = vcat (punctuate semi (map pp_deprec (nameEnvElts env)))
+ where
+ pp_deprec (name, txt) = pprOcc name <+> doubleQuotes (ptext txt)
\end{code}
projects / ghc-hetmet.git / blobdiff