#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 StgSyn
import CgMonad
import AbsCSyn
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 ( DynFlags, DynFlag(..),
opt_SccProfilingOn, opt_EnsureSplittableC )
-import CostCentre ( CostCentre, CostCentreStack )
-import Id ( Id, idName )
+import CostCentre ( CollectedCCs )
+import Id ( Id, idName, setIdName )
+import Name ( nameSrcLoc, nameOccName, nameUnique, isInternalName, mkExternalName )
+import OccName ( mkLocalOcc )
import Module ( Module )
import PrimRep ( PrimRep(..) )
import TyCon ( TyCon, isDataTyCon )
import UniqSupply ( mkSplitUniqSupply )
import ErrUtils ( dumpIfSet_dyn, showPass )
import Panic ( assertPanic )
+
+#ifdef DEBUG
+import Outputable
+#endif
\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
+ -> 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 (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]
- -- 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
- maybe_split = if opt_EnsureSplittableC
- then CSplitMarker
- else AbsCNop
- 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
[ 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`
+cgTopBinding :: (StgBinding,[Id]) -> Code
+cgTopBinding (StgNonRec srt_info id rhs, srt)
+ = absC maybeSplitCode `thenC`
+ maybeExternaliseId id `thenFC` \ id' ->
+ let
+ srt_label = mkSRTLabel (idName id')
+ in
+ mkSRT srt_label srt [] `thenC`
setSRTLabel srt_label (
- cgTopRhs name rhs `thenFC` \ (name, info) ->
- addBindC name info
+ cgTopRhs id' rhs srt_info `thenFC` \ (id, info) ->
+ addBindC id info -- Add the un-externalised Id to the envt, so we
+ -- find it when we look up occurrences
)
- where
- srt_label = mkSRTLabel (idName name)
-cgTopBinding split ((StgRec pairs@((name,rhs):_)), srt)
- = absC split `thenC`
- absC (mkSRT srt_label srt) `thenC`
+cgTopBinding (StgRec srt_info pairs, srt)
+ = absC maybeSplitCode `thenC`
+ let
+ (bndrs, rhss) = unzip pairs
+ in
+ mapFCs maybeExternaliseId bndrs `thenFC` \ bndrs'@(id:_) ->
+ let
+ srt_label = mkSRTLabel (idName id)
+ pairs' = zip bndrs' rhss
+ in
+ mkSRT srt_label srt bndrs' `thenC`
setSRTLabel srt_label (
- fixC (\ new_binds -> addBindsC new_binds `thenC`
- mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs
- ) `thenFC` \ new_binds ->
- addBindsC new_binds
+ fixC (\ new_binds ->
+ addBindsC new_binds `thenC`
+ mapFCs ( \ (b,e) -> cgTopRhs b e srt_info ) pairs'
+ ) `thenFC` \ new_binds -> nopC
)
- where
- srt_label = mkSRTLabel (idName name)
-mkSRT :: CLabel -> [Id] -> AbstractC
-mkSRT lbl [] = AbsCNop
-mkSRT lbl ids = CSRT lbl (map (mkClosureLabel . idName) ids)
+mkSRT :: CLabel -> [Id] -> [Id] -> Code
+mkSRT lbl [] these = nopC
+mkSRT lbl ids these
+ = mapFCs remap ids `thenFC` \ ids ->
+ absC (CSRT lbl (map (mkClosureLabel . idName) ids))
+ where
+ -- 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...
+cgTopRhs :: Id -> StgRhs -> SRT -> FCode (Id, CgIdInfo)
+ -- 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 (StgRhsCon cc con args) srt
+ = forkStatics (cgTopRhsCon bndr con args srt)
-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 args body) srt
+ = ASSERT(null fvs) -- There should be no free variables
+ let
+ lf_info = mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag args
in
- 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 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}