import ClosureInfo ( mkClosureLFInfo )
import CmdLineOpts ( DynFlags, DynFlag(..),
opt_SccProfilingOn, opt_EnsureSplittableC )
-import CostCentre ( CostCentre, CostCentreStack )
+import CostCentre ( CollectedCCs )
import Id ( Id, idName, setIdName )
-import Name ( globaliseName )
+import Name ( nameSrcLoc, nameOccName, nameUnique, isLocalName, mkGlobalName )
+import OccName ( mkLocalOcc )
import Module ( Module )
import PrimRep ( PrimRep(..) )
import TyCon ( TyCon, isDataTyCon )
import Panic ( assertPanic )
#ifdef DEBUG
-import Id ( idCafInfo )
-import IdInfo ( mayHaveCafRefs )
import Outputable
#endif
\end{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
+ -> CollectedCCs -- (Local/global) cost-centres needing declaring/registering.
-> [Id] -- foreign-exported binders
-> [TyCon] -- Local tycons, including ones from classes
-> [(StgBinding,[Id])] -- Bindings to convert, with SRTs
codeGen dflags mod_name imported_modules cost_centre_info fe_binders
tycons stg_binds
= do { showPass dflags "CodeGen"
-
; 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
-
- 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
-
; dumpIfSet_dyn dflags Opt_D_dump_absC "Abstract C" (dumpRealC abstractC)
+ ; let flat_abstractC = flattenAbsC fl_uniqs abstractC
; return flat_abstractC
}
where
- data_tycons = filter isDataTyCon tycons
+ data_tycons = filter isDataTyCon tycons
+ cinfo = MkCompInfo mod_name
+
+ 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
+
+ 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
- cinfo = MkCompInfo mod_name
\end{code}
%************************************************************************
:: [Id] -- foreign exported functions
-> Module -- module name
-> [Module] -- import names
- -> ([CostCentre], -- cost centre info
- [CostCentre],
- [CostCentreStack])
+ -> CollectedCCs -- cost centre info
-> AbstractC
mkModuleInit fe_binders mod imps cost_centre_info
= let
mkSRT srt_label srt [] `thenC`
setSRTLabel srt_label (
cgTopRhs id' rhs srt_info `thenFC` \ (id, info) ->
- addBindC id info
+ addBindC id info -- Add the un-globalised Id to the envt, so we
+ -- find it when we look up occurrences
)
cgTopBinding (StgRec srt_info pairs, srt)
`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 -> SRT -> 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 globalised if necessary
cgTopRhs bndr (StgRhsCon cc con args) srt
- = maybeGlobaliseId bndr `thenFC` \ bndr' ->
- forkStatics (cgTopRhsCon bndr con args)
+ = forkStatics (cgTopRhsCon bndr con args)
cgTopRhs bndr (StgRhsClosure cc bi fvs upd_flag args body) srt
= -- 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
+ let
+ lf_info = mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag args
in
- maybeGlobaliseId bndr `thenFC` \ bndr' ->
- forkStatics (cgTopRhsClosure bndr' cc bi args body lf_info)
+ 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 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).
+
+\begin{code}
+maybeGlobaliseId :: Id -> FCode Id
+maybeGlobaliseId id
+ | opt_EnsureSplittableC, -- Globalise the name for -split-objs
+ isLocalName name
+ = moduleName `thenFC` \ mod ->
+ returnFC (setIdName id (mkGlobalName 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