X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FcodeGen%2FCodeGen.lhs;h=fd5ef9d3a1712d0f3383e2b9d94e556b1455f12c;hb=d28ba8c800901bea01f70c4719278c2a364cf9fc;hp=6d388277fbff9b6b2ce2e8ef1e9910e88e8a7fbe;hpb=dc7d7a2f55bfd830755aa7040f93f07f3e72ac1e;p=ghc-hetmet.git diff --git a/ghc/compiler/codeGen/CodeGen.lhs b/ghc/compiler/codeGen/CodeGen.lhs index 6d38827..fd5ef9d 100644 --- a/ghc/compiler/codeGen/CodeGen.lhs +++ b/ghc/compiler/codeGen/CodeGen.lhs @@ -19,105 +19,189 @@ module CodeGen ( codeGen ) where #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, v_MainModIs ) import StgSyn import CgMonad import AbsCSyn -import CLabel ( CLabel, mkSRTLabel, mkClosureLabel ) - -import AbsCUtils ( mkAbstractCs, mkAbsCStmts ) -import CgBindery ( CgIdInfo ) +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 CgClosure ( cgTopRhsClosure ) import CgCon ( cgTopRhsCon ) import CgConTbls ( genStaticConBits ) import ClosureInfo ( mkClosureLFInfo ) -import CmdLineOpts ( opt_SccProfilingOn, opt_EnsureSplittableC, - opt_SccGroup - ) -import CostCentre ( CostCentre, CostCentreStack ) -import FiniteMap ( FiniteMap ) -import Id ( Id, idName ) -import Module ( Module, moduleString ) -import PrimRep ( getPrimRepSize, PrimRep(..) ) -import Type ( Type ) -import TyCon ( TyCon ) +import CmdLineOpts ( DynFlags, DynFlag(..), + opt_SccProfilingOn, opt_EnsureSplittableC ) +import HscTypes ( ForeignStubs(..), TypeEnv, typeEnvTyCons ) +import CostCentre ( CollectedCCs ) +import Id ( Id, idName, setIdName ) +import Name ( nameSrcLoc, nameOccName, nameUnique, isInternalName, mkExternalName ) +import OccName ( mkLocalOcc ) +import PrimRep ( PrimRep(..) ) +import TyCon ( isDataTyCon ) +import Module ( Module, mkModuleName ) import BasicTypes ( TopLevelFlag(..) ) -import Util +import UniqSupply ( mkSplitUniqSupply ) +import ErrUtils ( dumpIfSet_dyn, showPass ) import Panic ( assertPanic ) +import qualified Module ( moduleName ) + +#ifdef DEBUG +import Outputable +#endif + +import DATA_IOREF ( readIORef ) +\end{code} + +\begin{code} +codeGen :: DynFlags + -> 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 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 + + datatype_stuff = genStaticConBits cinfo data_tycons + code_stuff = initC cinfo (mapCs cgTopBinding stg_binds) + 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 + + dumpIfSet_dyn dflags Opt_D_dump_absC "Abstract C" (dumpRealC abstractC) + + return $! flattenAbsC fl_uniqs abstractC \end{code} +%************************************************************************ +%* * +\subsection[codegen-init]{Module initialisation code} +%* * +%************************************************************************ + \begin{code} -codeGen :: Module -- module name - -> ([CostCentre], -- local cost-centres needing declaring/registering - [CostCentre], -- "extern" cost-centres needing declaring - [CostCentreStack]) -- pre-defined "singleton" cost centre stacks - -> [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 +mkModuleInit + :: String -- the "way" + -> CollectedCCs -- cost centre info + -> Module + -> Maybe String -- Just m ==> we have flag: -main-is Foo.baz + -> ForeignStubs + -> [Module] + -> AbstractC +mkModuleInit way cost_centre_info this_mod mb_main_mod foreign_stubs imported_mods = let - maybe_split = if opt_EnsureSplittableC - then CSplitMarker - else AbsCNop - cinfo = MkCompInfo mod_name + (cc_decls, cc_regs) = mkCostCentreStuff cost_centre_info + + 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 - 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 (mkPlainModuleInitLabel this_mod) + (mkModuleInitLabel this_mod way) + (mkAbstractCs (register_foreign_exports ++ + cc_regs : + register_mod_imports)), + main_init_block + ] +\end{code} + +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.) +\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 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" ++ moduleString import_name)) AddrRep] + = CCallProfCCMacro FSLIT("REGISTER_CCS") [mkCCostCentreStack ccs] \end{code} %************************************************************************ @@ -126,7 +210,7 @@ codeGen mod_name (local_CCs, extern_CCs, singleton_CCSs) %* * %************************************************************************ -@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. @@ -137,53 +221,98 @@ style, with the increasing static environment being plumbed as a state variable. \begin{code} -cgTopBindings :: AbstractC -> [(StgBinding,[Id])] -> Code - -cgTopBindings split bindings = mapCs (cgTopBinding split) bindings +cgTopBinding :: (StgBinding,[(Id,[Id])]) -> Code +cgTopBinding (StgNonRec id rhs, srts) + = absC maybeSplitCode `thenC` + 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 :: AbstractC -> (StgBinding,[Id]) -> Code +cgTopBinding (StgRec pairs, srts) + = absC maybeSplitCode `thenC` + let + (bndrs, rhss) = unzip pairs + in + mapFCs maybeExternaliseId bndrs `thenFC` \ bndrs' -> + let + pairs' = zip bndrs' rhss + in + mapM_ (mkSRT bndrs') srts `thenC` + fixC (\ new_binds -> + addBindsC new_binds `thenC` + mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs' + ) `thenFC` \ new_binds -> + nopC -cgTopBinding split ((StgNonRec name rhs), srt) - = absC split `thenC` - absC (mkSRT srt_label srt) `thenC` - setSRTLabel srt_label ( - cgTopRhs name rhs `thenFC` \ (name, info) -> - addBindC name info - ) - where - srt_label = mkSRTLabel (idName name) - -cgTopBinding split ((StgRec pairs@((name,rhs):_)), srt) - = absC split `thenC` - absC (mkSRT srt_label srt) `thenC` - setSRTLabel srt_label ( - fixC (\ new_binds -> addBindsC new_binds `thenC` - mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs - ) `thenFC` \ new_binds -> - addBindsC new_binds - ) +mkSRT :: [Id] -> (Id,[Id]) -> Code +mkSRT these (id,[]) = nopC +mkSRT these (id,ids) + = mapFCs remap ids `thenFC` \ ids -> + remap id `thenFC` \ id -> + absC (CSRT (mkSRTLabel (idName id)) (map (mkClosureLabel . idName) ids)) where - srt_label = mkSRTLabel (idName name) - -mkSRT :: CLabel -> [Id] -> AbstractC -mkSRT lbl [] = AbsCNop -mkSRT lbl ids = CSRT lbl (map (mkClosureLabel . idName) ids) + -- 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... + -- 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 + = 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) +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 + 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 - lf_info = mkClosureLFInfo bndr TopLevel [{-no fvs-}] upd_flag args + 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}