#include "HsVersions.h"
+-- Kludge (??) so that CgExpr is reached via at least one non-SOURCE
+-- import. Before, that wasn't the case, and CM therefore didn't
+-- bother to compile it.
+import CgExpr ( {-NOTHING!-} ) -- DO NOT DELETE THIS IMPORT
+
+import DriverState ( v_Build_tag )
import StgSyn
import CgMonad
import AbsCSyn
-import CLabel ( CLabel, mkSRTLabel, mkClosureLabel, mkModuleInitLabel )
-
+import PrelNames ( gHC_PRIM )
+import CLabel ( mkSRTLabel, mkClosureLabel,
+ mkPlainModuleInitLabel, mkModuleInitLabel )
import PprAbsC ( dumpRealC )
import AbsCUtils ( mkAbstractCs, flattenAbsC )
-import CgBindery ( CgIdInfo, addBindC, addBindsC )
+import CgBindery ( CgIdInfo, addBindC, addBindsC, getCAddrModeAndInfo )
import CgClosure ( cgTopRhsClosure )
import CgCon ( cgTopRhsCon )
import CgConTbls ( genStaticConBits )
import ClosureInfo ( mkClosureLFInfo )
-import CmdLineOpts ( opt_SccProfilingOn, opt_EnsureSplittableC,
- opt_D_dump_absC
- )
-import CostCentre ( CostCentre, CostCentreStack )
-import Id ( Id, idName )
-import Module ( Module, moduleString, moduleName,
- ModuleName )
-import PrimRep ( getPrimRepSize, PrimRep(..) )
-import Type ( Type )
-import TyCon ( TyCon, isDataTyCon )
-import Class ( Class, classTyCon )
+import CmdLineOpts ( DynFlags, DynFlag(..),
+ opt_SccProfilingOn, opt_EnsureSplittableC )
+import HscTypes ( ForeignStubs(..), TypeEnv, typeEnvTyCons )
+import CostCentre ( CollectedCCs )
+import Id ( Id, idName, setIdName )
+import Name ( nameSrcLoc, nameOccName, nameUnique, isInternalName, mkExternalName )
+import OccName ( mkLocalOcc )
+import PrimRep ( PrimRep(..) )
+import TyCon ( isDataTyCon )
+import Module ( Module )
import BasicTypes ( TopLevelFlag(..) )
import UniqSupply ( mkSplitUniqSupply )
-import ErrUtils ( dumpIfSet )
-import Util
+import ErrUtils ( dumpIfSet_dyn, showPass )
import Panic ( assertPanic )
+
+#ifdef DEBUG
+import Outputable
+#endif
+
+import DATA_IOREF ( readIORef )
\end{code}
\begin{code}
+codeGen :: DynFlags
+ -> Module
+ -> TypeEnv
+ -> ForeignStubs
+ -> [Module] -- directly-imported modules
+ -> CollectedCCs -- (Local/global) cost-centres needing declaring/registering.
+ -> [(StgBinding,[(Id,[Id])])] -- Bindings to convert, with SRTs
+ -> IO AbstractC -- Output
+codeGen dflags this_mod type_env foreign_stubs imported_mods
+ cost_centre_info stg_binds
+ = do
+ showPass dflags "CodeGen"
+ fl_uniqs <- mkSplitUniqSupply 'f'
+ way <- readIORef v_Build_tag
-codeGen :: Module -- Module name
- -> [ModuleName] -- Import names
- -> ([CostCentre], -- Local cost-centres needing declaring/registering
- [CostCentre], -- "extern" cost-centres needing declaring
- [CostCentreStack]) -- Pre-defined "singleton" cost centre stacks
- -> [Id] -- foreign-exported binders
- -> [TyCon] -> [Class] -- Local tycons and classes
- -> [(StgBinding,[Id])] -- Bindings to convert, with SRTs
- -> IO AbstractC -- Output
+ let
+ tycons = typeEnvTyCons type_env
+ data_tycons = filter isDataTyCon tycons
-codeGen mod_name imported_modules cost_centre_info fe_binders
- tycons classes stg_binds
- = mkSplitUniqSupply 'f' >>= \ fl_uniqs -> -- absC flattener
- let
- datatype_stuff = genStaticConBits cinfo data_tycons
- code_stuff = initC cinfo (cgTopBindings maybe_split stg_binds)
- init_stuff = mkModuleInit fe_binders mod_name imported_modules
- cost_centre_info
-
- abstractC = mkAbstractCs [ maybe_split,
- init_stuff,
- code_stuff,
- datatype_stuff]
+ mapM_ (\x -> seq x (return ())) data_tycons
+
+ let
+
+ cinfo = MkCompInfo this_mod
+
+ datatype_stuff = genStaticConBits cinfo data_tycons
+ code_stuff = initC cinfo (mapCs cgTopBinding stg_binds)
+ init_stuff = mkModuleInit way cost_centre_info this_mod
+ foreign_stubs imported_mods
+
+ abstractC = mkAbstractCs [ maybeSplitCode,
+ init_stuff,
+ code_stuff,
+ datatype_stuff]
-- Put datatype_stuff after code_stuff, because the
- -- datatype closure table (for enumeration types)
- -- to (say) PrelBase_True_closure, which is defined in code_stuff
+ -- datatype closure table (for enumeration types) to
+ -- (say) PrelBase_True_closure, which is defined in
+ -- code_stuff
- flat_abstractC = flattenAbsC fl_uniqs abstractC
- in
- dumpIfSet opt_D_dump_absC "Abstract C" (dumpRealC abstractC) >>
- return flat_abstractC
+ dumpIfSet_dyn dflags Opt_D_dump_absC "Abstract C" (dumpRealC abstractC)
- where
- data_tycons = filter isDataTyCon (tycons ++ map classTyCon classes)
- -- Generate info tables for the data constrs arising
- -- from class decls as well
-
- maybe_split = if opt_EnsureSplittableC
- then CSplitMarker
- else AbsCNop
- cinfo = MkCompInfo mod_name
+ return $! flattenAbsC fl_uniqs abstractC
\end{code}
%************************************************************************
\begin{code}
mkModuleInit
- :: [Id] -- foreign exported functions
- -> Module -- module name
- -> [ModuleName] -- import names
- -> ([CostCentre], -- cost centre info
- [CostCentre],
- [CostCentreStack])
+ :: String -- the "way"
+ -> CollectedCCs -- cost centre info
+ -> Module
+ -> ForeignStubs
+ -> [Module]
-> AbstractC
-mkModuleInit fe_binders mod imps cost_centre_info
+mkModuleInit way cost_centre_info this_mod foreign_stubs imported_mods
= let
- register_fes =
- map (\f -> CMacroStmt REGISTER_FOREIGN_EXPORT [f]) fe_labels
+ (cc_decls, cc_regs) = mkCostCentreStuff cost_centre_info
- fe_labels =
- map (\f -> CLbl (mkClosureLabel (idName f)) PtrRep) fe_binders
+ register_foreign_exports
+ = case foreign_stubs of
+ NoStubs -> []
+ ForeignStubs _ _ _ fe_bndrs -> map mk_export_register fe_bndrs
- (cc_decls, cc_regs) = mkCostCentreStuff cost_centre_info
+ mk_export_register bndr
+ = CMacroStmt REGISTER_FOREIGN_EXPORT [lbl]
+ where
+ lbl = CLbl (mkClosureLabel (idName bndr)) PtrRep
+ -- we don't want/need to init GHC.Prim, so filter it out
- mk_import_register import_name
- = CMacroStmt REGISTER_IMPORT [
- CLbl (mkModuleInitLabel import_name) AddrRep
- ]
+ mk_import_register mod
+ | mod == gHC_PRIM = AbsCNop
+ | otherwise = CMacroStmt REGISTER_IMPORT [
+ CLbl (mkModuleInitLabel mod way) AddrRep
+ ]
- register_imports = map mk_import_register imps
+ register_mod_imports = map mk_import_register imported_mods
in
mkAbstractCs [
cc_decls,
- CModuleInitBlock (mkModuleInitLabel (Module.moduleName mod))
- (mkAbstractCs (register_fes ++
+ CModuleInitBlock (mkPlainModuleInitLabel this_mod)
+ (mkModuleInitLabel this_mod way)
+ (mkAbstractCs (register_foreign_exports ++
cc_regs :
- register_imports))
+ register_mod_imports))
]
\end{code}
[ register_ccs, register_cc_stacks ]
where
mk_register cc
- = CCallProfCCMacro SLIT("REGISTER_CC") [mkCCostCentre cc]
+ = CCallProfCCMacro FSLIT("REGISTER_CC") [mkCCostCentre cc]
mk_register_ccs ccs
- = CCallProfCCMacro SLIT("REGISTER_CCS") [mkCCostCentreStack ccs]
+ = CCallProfCCMacro FSLIT("REGISTER_CCS") [mkCCostCentreStack ccs]
\end{code}
%************************************************************************
%* *
%************************************************************************
-@cgTopBindings@ is only used for top-level bindings, since they need
+@cgTopBinding@ is only used for top-level bindings, since they need
to be allocated statically (not in the heap) and need to be labelled.
No unboxed bindings can happen at top level.
variable.
\begin{code}
-cgTopBindings :: AbstractC -> [(StgBinding,[Id])] -> Code
-
-cgTopBindings split bindings = mapCs (cgTopBinding split) bindings
-
-cgTopBinding :: AbstractC -> (StgBinding,[Id]) -> Code
-
-cgTopBinding split ((StgNonRec name rhs), srt)
- = absC split `thenC`
- absC (mkSRT srt_label srt) `thenC`
- setSRTLabel srt_label (
- cgTopRhs name rhs `thenFC` \ (name, info) ->
- addBindC name info
- )
- where
- srt_label = mkSRTLabel (idName name)
-
-cgTopBinding split ((StgRec pairs@((name,rhs):_)), srt)
- = absC split `thenC`
- absC (mkSRT srt_label srt) `thenC`
- setSRTLabel srt_label (
- fixC (\ new_binds -> addBindsC new_binds `thenC`
- mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs
- ) `thenFC` \ new_binds ->
- addBindsC new_binds
- )
+cgTopBinding :: (StgBinding,[(Id,[Id])]) -> Code
+cgTopBinding (StgNonRec id rhs, srts)
+ = absC maybeSplitCode `thenC`
+ maybeExternaliseId id `thenFC` \ id' ->
+ mapM_ (mkSRT [id']) srts `thenC`
+ cgTopRhs id' rhs `thenFC` \ (id, info) ->
+ addBindC id info `thenC`
+ -- Add the un-externalised Id to the envt, so we
+ -- find it when we look up occurrences
+ nopC
+
+cgTopBinding (StgRec pairs, srts)
+ = absC maybeSplitCode `thenC`
+ let
+ (bndrs, rhss) = unzip pairs
+ in
+ mapFCs maybeExternaliseId bndrs `thenFC` \ bndrs' ->
+ let
+ pairs' = zip bndrs' rhss
+ in
+ mapM_ (mkSRT bndrs') srts `thenC`
+ fixC (\ new_binds ->
+ addBindsC new_binds `thenC`
+ mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs'
+ ) `thenFC` \ new_binds ->
+ nopC
+
+mkSRT :: [Id] -> (Id,[Id]) -> Code
+mkSRT these (id,[]) = nopC
+mkSRT these (id,ids)
+ = mapFCs remap ids `thenFC` \ ids ->
+ remap id `thenFC` \ id ->
+ absC (CSRT (mkSRTLabel (idName id)) (map (mkClosureLabel . idName) ids))
where
- srt_label = mkSRTLabel (idName name)
-
-mkSRT :: CLabel -> [Id] -> AbstractC
-mkSRT lbl [] = AbsCNop
-mkSRT lbl ids = CSRT lbl (map (mkClosureLabel . idName) ids)
+ -- sigh, better map all the ids against the environment in case they've
+ -- been externalised (see maybeExternaliseId below).
+ remap id = case filter (==id) these of
+ [] -> getCAddrModeAndInfo id
+ `thenFC` \ (id, _, _) -> returnFC id
+ (id':_) -> returnFC id'
-- Urgh! I tried moving the forkStatics call from the rhss of cgTopRhs
-- to enclose the listFCs in cgTopBinding, but that tickled the
-- statics "error" call in initC. I DON'T UNDERSTAND WHY!
cgTopRhs :: Id -> StgRhs -> FCode (Id, CgIdInfo)
- -- the Id is passed along for setting up a binding...
+ -- The Id is passed along for setting up a binding...
+ -- It's already been externalised if necessary
cgTopRhs bndr (StgRhsCon cc con args)
= forkStatics (cgTopRhsCon bndr con args)
-cgTopRhs bndr (StgRhsClosure cc bi srt fvs upd_flag args body)
- = ASSERT(null fvs) -- There should be no free variables
- getSRTLabel `thenFC` \srt_label ->
- let lf_info =
- mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag args srt_label srt
+cgTopRhs bndr (StgRhsClosure cc bi fvs upd_flag srt args body)
+ = ASSERT(null fvs) -- There should be no free variables
+ let
+ srt_label = mkSRTLabel (idName bndr)
+ lf_info = mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag args
in
- forkStatics (cgTopRhsClosure bndr cc bi args body lf_info)
+ setSRTLabel srt_label $
+ forkStatics (cgTopRhsClosure bndr cc bi srt args body lf_info)
+\end{code}
+
+
+%************************************************************************
+%* *
+\subsection{Stuff to support splitting}
+%* *
+%************************************************************************
+
+If we're splitting the object, we need to externalise all the top-level names
+(and then make sure we only use the externalised one in any C label we use
+which refers to this name).
+
+\begin{code}
+maybeExternaliseId :: Id -> FCode Id
+maybeExternaliseId id
+ | opt_EnsureSplittableC, -- Externalise the name for -split-objs
+ isInternalName name
+ = moduleName `thenFC` \ mod ->
+ returnFC (setIdName id (mkExternalName uniq mod new_occ (nameSrcLoc name)))
+ | otherwise
+ = returnFC id
+ where
+ name = idName id
+ uniq = nameUnique name
+ new_occ = mkLocalOcc uniq (nameOccName name)
+ -- We want to conjure up a name that can't clash with any
+ -- existing name. So we generate
+ -- Mod_$L243foo
+ -- where 243 is the unique.
+
+maybeSplitCode
+ | opt_EnsureSplittableC = CSplitMarker
+ | otherwise = AbsCNop
\end{code}