#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 CLabel ( CLabel, mkSRTLabel, mkClosureLabel )
+import CLabel ( CLabel, mkSRTLabel, mkClosureLabel, mkModuleInitLabel )
-import AbsCUtils ( mkAbstractCs, mkAbsCStmts )
-import CgBindery ( CgIdInfo )
+import PprAbsC ( dumpRealC )
+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_SccGroup
- )
+import CmdLineOpts ( DynFlags, DynFlag(..),
+ opt_SccProfilingOn, opt_EnsureSplittableC )
import CostCentre ( CostCentre, CostCentreStack )
-import FiniteMap ( FiniteMap )
-import Id ( Id, idName )
-import Name ( Module, moduleCString, moduleString )
-import PrimRep ( getPrimRepSize, PrimRep(..) )
-import Type ( Type )
-import TyCon ( TyCon )
+import Id ( Id, idName, setIdName )
+import Name ( globaliseName )
+import Module ( Module )
+import PrimRep ( PrimRep(..) )
+import TyCon ( TyCon, isDataTyCon )
import BasicTypes ( TopLevelFlag(..) )
-import Util
+import UniqSupply ( mkSplitUniqSupply )
+import ErrUtils ( dumpIfSet_dyn, showPass )
import Panic ( assertPanic )
+
+#ifdef DEBUG
+import Id ( idCafInfo )
+import IdInfo ( mayHaveCafRefs )
+import Outputable
+#endif
\end{code}
\begin{code}
-codeGen :: Module -- module name
- -> ([CostCentre], -- local cost-centres needing declaring/registering
+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
+ [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
+ -> IO AbstractC -- Output
+
+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)
+ ; return flat_abstractC
+ }
+ where
+ data_tycons = filter isDataTyCon tycons
+
+ cinfo = MkCompInfo mod_name
+\end{code}
+
+%************************************************************************
+%* *
+\subsection[codegen-init]{Module initialisation code}
+%* *
+%************************************************************************
+
+\begin{code}
+mkModuleInit
+ :: [Id] -- foreign exported functions
+ -> Module -- module name
-> [Module] -- import names
- -> [TyCon] -- tycons with data constructors to convert
- -> FiniteMap TyCon [(Bool, [Maybe Type])]
- -- tycon specialisation info
- -> [(StgBinding,[Id])] -- bindings to convert, with SRTs
- -> AbstractC -- output
-
-codeGen mod_name (local_CCs, extern_CCs, singleton_CCSs)
- import_names gen_tycons tycon_specs stg_pgm
+ -> ([CostCentre], -- cost centre info
+ [CostCentre],
+ [CostCentreStack])
+ -> AbstractC
+mkModuleInit fe_binders mod imps cost_centre_info
= let
- maybe_split = if opt_EnsureSplittableC
- then CSplitMarker
- else AbsCNop
- cinfo = MkCompInfo mod_name
+ 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
in
- let
- module_code = mkAbstractCs [
- genStaticConBits cinfo gen_tycons tycon_specs,
- initC cinfo (cgTopBindings maybe_split stg_pgm) ]
-
- -- Cost-centre profiling:
- -- Besides the usual stuff, we must produce:
- --
- -- * 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.)
- --
- --
- cost_centre_stuff
- | 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
- )
- in
- mkAbstractCs [ cost_centre_stuff, module_code ]
+ mkAbstractCs [
+ cc_decls,
+ CModuleInitBlock (mkModuleInitLabel mod)
+ (mkAbstractCs (register_fes ++
+ cc_regs :
+ register_imports))
+ ]
+\end{code}
- where
- -----------------
- grp_name = case opt_SccGroup of
- Just xx -> _PK_ xx
- Nothing -> _PK_ (moduleString mod_name) -- default: module name
+Cost-centre profiling: Besides the usual stuff, we must produce
+declarations for the cost-centres defined in this module;
+
+(The local cost-centres involved in this are passed into the
+code-generator.)
- -----------------
- mkCcRegister ccs cc_stacks import_names
+\begin{code}
+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
= 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" ++ moduleCString 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]
mk_register_ccs ccs
= CCallProfCCMacro SLIT("REGISTER_CCS") [mkCCostCentreStack ccs]
-
- mk_import_register import_name
- = CCallProfCCMacro SLIT("REGISTER_IMPORT")
- [CLitLit (_PK_ ("_reg" ++ moduleCString import_name)) AddrRep]
\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`
+ maybeGlobaliseId 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
)
- 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 maybeGlobaliseId 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
)
+
+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
- srt_label = mkSRTLabel (idName name)
+ -- sigh, better map all the ids against the environment in case they've
+ -- been globalised (see maybeGlobaliseId 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
-mkSRT :: CLabel -> [Id] -> AbstractC
-mkSRT lbl [] = AbsCNop
-mkSRT lbl ids = CSRT lbl (map (mkClosureLabel . idName) ids)
+ 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)
+cgTopRhs :: Id -> StgRhs -> SRT -> FCode (Id, CgIdInfo)
-- the Id is passed along for setting up a binding...
-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
+ = maybeGlobaliseId bndr `thenFC` \ bndr' ->
+ 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
- forkStatics (cgTopRhsClosure bndr cc bi srt args body lf_info)
- where
- lf_info = mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag 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
+ in
+ maybeGlobaliseId bndr `thenFC` \ bndr' ->
+ forkStatics (cgTopRhsClosure bndr' cc bi args body lf_info)
\end{code}
projects / ghc-hetmet.git / blobdiff