#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 )
+import PrelNames ( gHC_PRIM )
+import CLabel ( CLabel, mkSRTLabel, mkClosureLabel,
+ mkPlainModuleInitLabel, mkModuleInitLabel )
import PprAbsC ( dumpRealC )
-import AbsCUtils ( mkAbstractCs, mkAbsCStmts, flattenAbsC )
-import CgBindery ( CgIdInfo )
+import AbsCUtils ( mkAbstractCs, flattenAbsC )
+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, opt_SccGroup
- )
-import CostCentre ( CostCentre, CostCentreStack )
-import FiniteMap ( FiniteMap )
-import Id ( Id, idName )
-import Module ( Module, moduleString, ModuleName, moduleNameString )
-import PrimRep ( getPrimRepSize, PrimRep(..) )
-import Type ( Type )
+import CmdLineOpts ( DynFlags, DynFlag(..),
+ opt_SccProfilingOn, opt_EnsureSplittableC )
+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 Class ( Class, classTyCon )
-import BasicTypes ( TopLevelFlag(..) )
+import BasicTypes ( TopLevelFlag(..), Version )
import UniqSupply ( mkSplitUniqSupply )
-import ErrUtils ( dumpIfSet )
-import Util
+import ErrUtils ( dumpIfSet_dyn, showPass )
import Panic ( assertPanic )
-\end{code}
-\begin{code}
+#ifdef DEBUG
+import Outputable
+#endif
+import IOExts ( readIORef )
+\end{code}
-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
- -> [TyCon] -> [Class] -- Local tycons and classes
+\begin{code}
+codeGen :: DynFlags
+ -> Module -- Module name
+ -> [Module] -- Import names
+ -> 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
-> IO AbstractC -- Output
-codeGen mod_name imported_modules cost_centre_info
- 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)
- cost_centre_stuff = mkCostCentreStuff mod_name imported_modules cost_centre_info
+codeGen dflags mod_name imported_modules cost_centre_info fe_binders
+ tycons stg_binds
+ = do
+ showPass dflags "CodeGen"
+ fl_uniqs <- mkSplitUniqSupply 'f'
+ way <- readIORef v_Build_tag
+
+ let
+ 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 way
+ 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
+
+ dumpIfSet_dyn dflags Opt_D_dump_absC "Abstract C" (dumpRealC abstractC)
+
+ return $! flattenAbsC fl_uniqs abstractC
+\end{code}
- abstractC = mkAbstractCs [ cost_centre_stuff,
- datatype_stuff,
- code_stuff ]
+%************************************************************************
+%* *
+\subsection[codegen-init]{Module initialisation code}
+%* *
+%************************************************************************
- flat_abstractC = flattenAbsC fl_uniqs abstractC
+\begin{code}
+mkModuleInit
+ :: [Id] -- foreign exported functions
+ -> Module -- module name
+ -> String -- the "way"
+ -> [Module] -- import names
+ -> CollectedCCs -- cost centre info
+ -> AbstractC
+mkModuleInit fe_binders mod way imps cost_centre_info
+ = 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
+
+ -- we don't want/need to init GHC.Prim, so filter it out
+ mk_import_register imp
+ | imp == gHC_PRIM = AbsCNop
+ | otherwise = CMacroStmt REGISTER_IMPORT [
+ CLbl (mkModuleInitLabel imp way) AddrRep
+ ]
+
+ register_imports = map mk_import_register imps
in
- dumpIfSet opt_D_dump_absC "Abstract C" (dumpRealC abstractC) >>
- return flat_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
+ mkAbstractCs [
+ cc_decls,
+ CModuleInitBlock (mkPlainModuleInitLabel mod)
+ (mkModuleInitLabel mod way)
+ (mkAbstractCs (register_fes ++
+ cc_regs :
+ register_imports))
+ ]
\end{code}
-Cost-centre profiling:
-Besides the usual stuff, we must produce:
+Cost-centre profiling: Besides the usual stuff, we must produce
+declarations for the cost-centres defined in this module;
-* Declarations for the cost-centres defined in this module;
-* Code to participate in "registering" all the cost-centres
- in the program (done at startup time when the pgm is run).
-
-(The local cost-centres involved in this are passed
-into the code-generator, as are the imported-modules' names.)
+(The local cost-centres involved in this are passed into the
+code-generator.)
\begin{code}
-mkCostCentreStuff mod_name import_names (local_CCs, extern_CCs, singleton_CCSs)
- | not opt_SccProfilingOn = AbsCNop
- | otherwise = mkAbstractCs (
- map (CCostCentreDecl True) local_CCs ++
- map (CCostCentreDecl False) extern_CCs ++
- map CCostCentreStackDecl singleton_CCSs ++
- mkCcRegister local_CCs singleton_CCSs import_names
- )
-
+mkCostCentreStuff (local_CCs, extern_CCs, singleton_CCSs)
+ | not opt_SccProfilingOn = (AbsCNop, AbsCNop)
+ | otherwise =
+ ( mkAbstractCs (
+ map (CCostCentreDecl True) local_CCs ++
+ map (CCostCentreDecl False) extern_CCs ++
+ map CCostCentreStackDecl singleton_CCSs),
+ mkAbstractCs (mkCcRegister local_CCs singleton_CCSs)
+ )
where
- mkCcRegister ccs cc_stacks import_names
+ mkCcRegister ccs cc_stacks
= let
- register_ccs = mkAbstractCs (map mk_register ccs)
- register_imports
- = foldr (mkAbsCStmts . mk_import_register) AbsCNop import_names
+ register_ccs = mkAbstractCs (map mk_register ccs)
register_cc_stacks = mkAbstractCs (map mk_register_ccs cc_stacks)
in
- [
- CCallProfCCMacro SLIT("START_REGISTER_CCS")
- [ CLitLit (_PK_ ("_reg" ++ moduleString mod_name)) AddrRep],
- register_ccs,
- register_cc_stacks,
- register_imports,
- CCallProfCCMacro SLIT("END_REGISTER_CCS") []
- ]
+ [ 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]
-
- mk_import_register import_name
- = CCallProfCCMacro SLIT("REGISTER_IMPORT")
- [CLitLit (_PK_ ("_reg" ++ moduleNameString import_name)) AddrRep]
+ = 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 (all zero_size args))
- where
- zero_size atom = getPrimRepSize (getArgPrimRep atom) == 0
+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}