-- bother to compile it.
import CgExpr ( {-NOTHING!-} ) -- DO NOT DELETE THIS IMPORT
+import DriverState ( v_Build_tag, v_MainModIs )
import StgSyn
import CgMonad
import AbsCSyn
-import CLabel ( CLabel, mkSRTLabel, mkClosureLabel, mkModuleInitLabel )
-
+import PrelNames ( gHC_PRIM, dOLLAR_MAIN, mAIN_Name )
+import CLabel ( mkSRTLabel, mkClosureLabel,
+ mkPlainModuleInitLabel, mkModuleInitLabel )
import PprAbsC ( dumpRealC )
import AbsCUtils ( mkAbstractCs, flattenAbsC )
import CgBindery ( CgIdInfo, addBindC, addBindsC, getCAddrModeAndInfo )
import ClosureInfo ( mkClosureLFInfo )
import CmdLineOpts ( DynFlags, DynFlag(..),
opt_SccProfilingOn, opt_EnsureSplittableC )
-import CostCentre ( CostCentre, CostCentreStack )
+import HscTypes ( ForeignStubs(..), TypeEnv, typeEnvTyCons )
+import CostCentre ( CollectedCCs )
import Id ( Id, idName, setIdName )
-import Name ( globaliseName )
-import Module ( Module )
+import Name ( nameSrcLoc, nameOccName, nameUnique, isInternalName, mkExternalName )
+import OccName ( mkLocalOcc )
import PrimRep ( PrimRep(..) )
-import TyCon ( TyCon, isDataTyCon )
+import TyCon ( isDataTyCon )
+import Module ( Module, mkModuleName )
import BasicTypes ( TopLevelFlag(..) )
import UniqSupply ( mkSplitUniqSupply )
import ErrUtils ( dumpIfSet_dyn, showPass )
import Panic ( assertPanic )
+import qualified Module ( moduleName )
#ifdef DEBUG
-import Id ( idCafInfo )
-import IdInfo ( mayHaveCafRefs )
import Outputable
#endif
+
+import DATA_IOREF ( readIORef )
\end{code}
\begin{code}
codeGen :: DynFlags
- -> Module -- Module name
- -> [Module] -- 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] -- Local tycons, including ones from classes
- -> [(StgBinding,[Id])] -- Bindings to convert, with SRTs
+ -> 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 mod_name imported_modules cost_centre_info fe_binders
- tycons stg_binds
- = do { showPass dflags "CodeGen"
+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
+ mb_main_mod <- readIORef v_MainModIs
+
+ let
+ tycons = typeEnvTyCons type_env
+ data_tycons = filter isDataTyCon tycons
+
+ mapM_ (\x -> seq x (return ())) data_tycons
+
+ let
+
+ cinfo = MkCompInfo this_mod
- ; fl_uniqs <- mkSplitUniqSupply 'f'
- ; let
datatype_stuff = genStaticConBits cinfo data_tycons
code_stuff = initC cinfo (mapCs cgTopBinding stg_binds)
- init_stuff = mkModuleInit fe_binders mod_name imported_modules
- cost_centre_info
+ init_stuff = mkModuleInit way cost_centre_info
+ this_mod mb_main_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
-
- flat_abstractC = flattenAbsC fl_uniqs abstractC
+ -- datatype closure table (for enumeration types) to
+ -- (say) PrelBase_True_closure, which is defined in
+ -- code_stuff
- ; dumpIfSet_dyn dflags Opt_D_dump_absC "Abstract C" (dumpRealC abstractC)
- ; return flat_abstractC
- }
- where
- data_tycons = filter isDataTyCon tycons
+ dumpIfSet_dyn dflags Opt_D_dump_absC "Abstract C" (dumpRealC abstractC)
- cinfo = MkCompInfo mod_name
+ return $! flattenAbsC fl_uniqs abstractC
\end{code}
%************************************************************************
\begin{code}
mkModuleInit
- :: [Id] -- foreign exported functions
- -> Module -- module name
- -> [Module] -- import names
- -> ([CostCentre], -- cost centre info
- [CostCentre],
- [CostCentreStack])
+ :: String -- the "way"
+ -> CollectedCCs -- cost centre info
+ -> Module
+ -> Maybe String -- Just m ==> we have flag: -main-is Foo.baz
+ -> ForeignStubs
+ -> [Module]
-> AbstractC
-mkModuleInit fe_binders mod imps cost_centre_info
+mkModuleInit way cost_centre_info this_mod mb_main_mod foreign_stubs imported_mods
= let
- register_fes =
- map (\f -> CMacroStmt REGISTER_FOREIGN_EXPORT [f]) fe_labels
-
- fe_labels =
- map (\f -> CLbl (mkClosureLabel (idName f)) PtrRep) fe_binders
-
(cc_decls, cc_regs) = mkCostCentreStuff cost_centre_info
- mk_import_register imp =
- CMacroStmt REGISTER_IMPORT [
- CLbl (mkModuleInitLabel imp) AddrRep
- ]
-
- register_imports = map mk_import_register imps
+ register_foreign_exports
+ = case foreign_stubs of
+ NoStubs -> []
+ ForeignStubs _ _ _ fe_bndrs -> map mk_export_register fe_bndrs
+
+ 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 mod
+ | mod == gHC_PRIM = AbsCNop
+ | otherwise = CMacroStmt REGISTER_IMPORT [
+ CLbl (mkModuleInitLabel mod way) AddrRep
+ ]
+
+ register_mod_imports = map mk_import_register imported_mods
+
+ -- When compiling the module in which the 'main' function lives,
+ -- we inject an extra stg_init procedure for stg_init_zdMain, for the
+ -- RTS to invoke. We must consult the -main-is flag in case the
+ -- user specified a different function to Main.main
+ main_mod_name = case mb_main_mod of
+ Just mod_name -> mkModuleName mod_name
+ Nothing -> mAIN_Name
+ main_init_block
+ | Module.moduleName this_mod /= main_mod_name
+ = AbsCNop -- The normal case
+ | otherwise -- this_mod contains the main function
+ = CModuleInitBlock (mkPlainModuleInitLabel dOLLAR_MAIN)
+ (mkModuleInitLabel dOLLAR_MAIN way)
+ (mk_import_register this_mod)
in
mkAbstractCs [
cc_decls,
- CModuleInitBlock (mkModuleInitLabel mod)
- (mkAbstractCs (register_fes ++
+ CModuleInitBlock (mkPlainModuleInitLabel this_mod)
+ (mkModuleInitLabel this_mod way)
+ (mkAbstractCs (register_foreign_exports ++
cc_regs :
- register_imports))
+ register_mod_imports)),
+ main_init_block
]
\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}
%************************************************************************
variable.
\begin{code}
-cgTopBinding :: (StgBinding,[Id]) -> Code
-cgTopBinding (StgNonRec id rhs, srt)
+cgTopBinding :: (StgBinding,[(Id,[Id])]) -> Code
+cgTopBinding (StgNonRec id rhs, srts)
= absC maybeSplitCode `thenC`
- maybeGlobaliseId id `thenFC` \ id' ->
- let
- srt_label = mkSRTLabel (idName id')
- in
- mkSRT srt_label srt [] `thenC`
- setSRTLabel srt_label (
- cgTopRhs id' rhs `thenFC` \ (id, info) ->
- addBindC id info
- )
-
-cgTopBinding (StgRec pairs, srt)
+ 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 maybeGlobaliseId bndrs `thenFC` \ bndrs'@(id:_) ->
+ mapFCs maybeExternaliseId bndrs `thenFC` \ bndrs' ->
let
- srt_label = mkSRTLabel (idName id)
- pairs' = zip bndrs' rhss
+ pairs' = zip bndrs' rhss
in
- mkSRT srt_label srt bndrs' `thenC`
- setSRTLabel srt_label (
- fixC (\ new_binds ->
+ mapM_ (mkSRT bndrs') srts `thenC`
+ fixC (\ new_binds ->
addBindsC new_binds `thenC`
mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs'
- ) `thenFC` \ new_binds -> nopC
- )
+ ) `thenFC` \ new_binds ->
+ nopC
-mkSRT :: CLabel -> [Id] -> [Id] -> Code
-mkSRT lbl [] these = nopC
-mkSRT lbl ids these
+mkSRT :: [Id] -> (Id,[Id]) -> Code
+mkSRT these (id,[]) = nopC
+mkSRT these (id,ids)
= mapFCs remap ids `thenFC` \ ids ->
- absC (CSRT lbl (map (mkClosureLabel . idName) ids))
+ remap id `thenFC` \ id ->
+ absC (CSRT (mkSRTLabel (idName id)) (map (mkClosureLabel . idName) ids))
where
-- sigh, better map all the ids against the environment in case they've
- -- been globalised (see maybeGlobaliseId below).
+ -- been externalised (see maybeExternaliseId below).
remap id = case filter (==id) these of
[] -> getCAddrModeAndInfo id
`thenFC` \ (id, _, _) -> returnFC id
(id':_) -> returnFC id'
--- if we're splitting the object, we need to globalise all the top-level names
--- (and then make sure we only use the globalised one in any C label we use
--- which refers to this name).
-maybeGlobaliseId :: Id -> FCode Id
-maybeGlobaliseId id
- = moduleName `thenFC` \ mod ->
- let
- name = idName id
-
- -- globalise the name for -split-objs, if necessary
- real_name | opt_EnsureSplittableC = globaliseName name mod
- | otherwise = name
-
- id' = setIdName id real_name
- in
- returnFC id'
-
-maybeSplitCode
- | opt_EnsureSplittableC = CSplitMarker
- | otherwise = AbsCNop
-
-- 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)
- = maybeGlobaliseId bndr `thenFC` \ bndr' ->
- forkStatics (cgTopRhsCon bndr con args)
-
-cgTopRhs bndr (StgRhsClosure cc bi srt fvs upd_flag args body)
- = -- There should be no free variables
- ASSERT(null fvs)
- -- If the closure is a thunk, then the binder must be recorded as such.
- ASSERT2(not (isUpdatable upd_flag) || mayHaveCafRefs (idCafInfo bndr), ppr bndr)
-
- getSRTLabel `thenFC` \srt_label ->
- let lf_info =
- mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag args srt_label srt
+ = forkStatics (cgTopRhsCon bndr con args)
+
+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
- maybeGlobaliseId bndr `thenFC` \ bndr' ->
- 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}
projects / ghc-hetmet.git / blobdiff