X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FcodeGen%2FCodeGen.lhs;h=863d29e2e2b3dc9a8b471a59c81826af063dbd15;hp=e8d83a5a43bf51e1fadb2414a3bb962a28ec012b;hb=c1681a73fa4ca4cf8758264ae387ac09a9e900d8;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1 diff --git a/compiler/codeGen/CodeGen.lhs b/compiler/codeGen/CodeGen.lhs index e8d83a5..863d29e 100644 --- a/compiler/codeGen/CodeGen.lhs +++ b/compiler/codeGen/CodeGen.lhs @@ -1,19 +1,15 @@ % +% (c) The University of Glasgow 2006 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998 % -\section[CodeGen]{@CodeGen@: main module of the code generator} + +The Code Generator This module says how things get going at the top level. @codeGen@ is the interface to the outside world. The \tr{cgTop*} functions drive the mangling of top-level bindings. -%************************************************************************ -%* * -\subsection[codeGen-outside-interface]{The code generator's offering to the world} -%* * -%************************************************************************ - \begin{code} module CodeGen ( codeGen ) where @@ -25,52 +21,51 @@ module CodeGen ( codeGen ) where import CgExpr ( {-NOTHING!-} ) -- DO NOT DELETE THIS IMPORT import CgProf import CgMonad -import CgBindery ( CgIdInfo, addBindC, addBindsC, getCgIdInfo, - cgIdInfoId ) -import CgClosure ( cgTopRhsClosure ) -import CgCon ( cgTopRhsCon, cgTyCon ) -import CgUtils ( cmmRegOffW, emitRODataLits, cmmNeWord ) +import CgBindery +import CgClosure +import CgCon +import CgUtils +import CgHpc import CLabel import Cmm -import CmmUtils ( zeroCLit, mkIntCLit, mkLblExpr ) -import PprCmm ( pprCmms ) -import MachOp ( wordRep, MachHint(..) ) +import CmmUtils +import PprCmm +import MachOp import StgSyn -import PrelNames ( gHC_PRIM, rOOT_MAIN, mAIN, pREL_TOP_HANDLER ) -import Packages ( HomeModules ) -import DynFlags ( DynFlags(..), DynFlag(..), dopt ) -import StaticFlags ( opt_SccProfilingOn ) - -import HscTypes ( ForeignStubs(..), TypeEnv, typeEnvTyCons ) -import CostCentre ( CollectedCCs ) -import Id ( Id, idName, setIdName ) -import Name ( nameSrcLoc, nameOccName, nameUnique, isInternalName, mkExternalName ) -import OccName ( mkLocalOcc ) -import TyCon ( TyCon ) -import Module ( Module, mkModule ) -import ErrUtils ( dumpIfSet_dyn, showPass ) -import Panic ( assertPanic ) +import PrelNames +import DynFlags +import StaticFlags + +import PackageConfig +import HscTypes +import CostCentre +import Id +import Name +import OccName +import TyCon +import Module +import ErrUtils #ifdef DEBUG -import Outputable +import Panic #endif \end{code} \begin{code} codeGen :: DynFlags - -> HomeModules -> Module -> [TyCon] -> ForeignStubs -> [Module] -- directly-imported modules -> CollectedCCs -- (Local/global) cost-centres needing declaring/registering. -> [(StgBinding,[(Id,[Id])])] -- Bindings to convert, with SRTs + -> HpcInfo -> IO [Cmm] -- Output -codeGen dflags hmods this_mod data_tycons foreign_stubs imported_mods - cost_centre_info stg_binds +codeGen dflags this_mod data_tycons foreign_stubs imported_mods + cost_centre_info stg_binds hpc_info = do { showPass dflags "CodeGen" ; let way = buildTag dflags @@ -79,12 +74,12 @@ codeGen dflags hmods this_mod data_tycons foreign_stubs imported_mods -- Why? -- ; mapM_ (\x -> seq x (return ())) data_tycons - ; code_stuff <- initC dflags hmods this_mod $ do - { cmm_binds <- mapM (getCmm . cgTopBinding dflags hmods) stg_binds + ; code_stuff <- initC dflags this_mod $ do + { cmm_binds <- mapM (getCmm . cgTopBinding dflags) stg_binds ; cmm_tycons <- mapM cgTyCon data_tycons - ; cmm_init <- getCmm (mkModuleInit dflags hmods way cost_centre_info + ; cmm_init <- getCmm (mkModuleInit dflags way cost_centre_info this_mod main_mod - foreign_stubs imported_mods) + foreign_stubs imported_mods hpc_info) ; return (cmm_binds ++ concat cmm_tycons ++ [cmm_init]) } -- Put datatype_stuff after code_stuff, because the @@ -143,24 +138,30 @@ We initialise the module tree by keeping a work-stack, \begin{code} mkModuleInit :: DynFlags - -> HomeModules -> String -- the "way" -> CollectedCCs -- cost centre info -> Module -> Module -- name of the Main module -> ForeignStubs -> [Module] + -> HpcInfo -> Code -mkModuleInit dflags hmods way cost_centre_info this_mod main_mod foreign_stubs imported_mods - = do { - if opt_SccProfilingOn - then do { -- Allocate the static boolean that records if this - -- module has been registered already - emitData Data [CmmDataLabel moduleRegdLabel, - CmmStaticLit zeroCLit] +mkModuleInit dflags way cost_centre_info this_mod main_mod foreign_stubs imported_mods hpc_info + = do { -- Allocate the static boolean that records if this + -- module has been registered already + emitData Data [CmmDataLabel moduleRegdLabel, + CmmStaticLit zeroCLit] + + ; whenC (opt_Hpc) $ + hpcTable this_mod hpc_info - ; emitSimpleProc real_init_lbl $ do - { ret_blk <- forkLabelledCode ret_code + -- we emit a recursive descent module search for all modules + -- and *choose* to chase it in :Main, below. + -- In this way, Hpc enabled modules can interact seamlessly with + -- not Hpc enabled moduled, provided Main is compiled with Hpc. + + ; emitSimpleProc real_init_lbl $ do + { ret_blk <- forkLabelledCode ret_code ; init_blk <- forkLabelledCode $ do { mod_init_code; stmtC (CmmBranch ret_blk) } @@ -169,8 +170,6 @@ mkModuleInit dflags hmods way cost_centre_info this_mod main_mod foreign_stubs i ret_blk) ; stmtC (CmmBranch init_blk) } - } - else emitSimpleProc real_init_lbl ret_code -- Make the "plain" procedure jump to the "real" init procedure ; emitSimpleProc plain_init_lbl jump_to_init @@ -180,13 +179,19 @@ mkModuleInit dflags hmods way cost_centre_info this_mod main_mod foreign_stubs i -- we inject an extra stg_init procedure for stg_init_ZCMain, for the -- RTS to invoke. We must consult the -main-is flag in case the -- user specified a different function to Main.main + + -- Notice that the recursive descent is optional, depending on what options + -- are enabled. + ; whenC (this_mod == main_mod) - (emitSimpleProc plain_main_init_lbl jump_to_init) + (emitSimpleProc plain_main_init_lbl rec_descent_init) } where - plain_init_lbl = mkPlainModuleInitLabel hmods this_mod - real_init_lbl = mkModuleInitLabel hmods this_mod way - plain_main_init_lbl = mkPlainModuleInitLabel hmods rOOT_MAIN + this_pkg = thisPackage dflags + + plain_init_lbl = mkPlainModuleInitLabel this_pkg this_mod + real_init_lbl = mkModuleInitLabel this_pkg this_mod way + plain_main_init_lbl = mkPlainModuleInitLabel this_pkg rOOT_MAIN jump_to_init = stmtC (CmmJump (mkLblExpr real_init_lbl) []) @@ -195,17 +200,22 @@ mkModuleInit dflags hmods way cost_centre_info this_mod main_mod foreign_stubs i -- Main refers to GHC.TopHandler.runIO, so make sure we call the -- init function for GHC.TopHandler. extra_imported_mods - | this_mod == main_mod = [pREL_TOP_HANDLER] + | this_mod == main_mod = [gHC_TOP_HANDLER] | otherwise = [] mod_init_code = do { -- Set mod_reg to 1 to record that we've been here stmtC (CmmStore (mkLblExpr moduleRegdLabel) (CmmLit (mkIntCLit 1))) - -- Now do local stuff - ; initCostCentres cost_centre_info - ; mapCs (registerModuleImport hmods way) + ; whenC (opt_SccProfilingOn) $ do + initCostCentres cost_centre_info + + ; whenC (opt_Hpc) $ + initHpc this_mod hpc_info + + ; mapCs (registerModuleImport this_pkg way) (imported_mods++extra_imported_mods) + } -- The return-code pops the work stack by @@ -213,14 +223,19 @@ mkModuleInit dflags hmods way cost_centre_info this_mod main_mod foreign_stubs i ret_code = stmtsC [ CmmAssign spReg (cmmRegOffW spReg 1) , CmmJump (CmmLoad (cmmRegOffW spReg (-1)) wordRep) [] ] + + rec_descent_init = if opt_SccProfilingOn || isHpcUsed hpc_info + then jump_to_init + else ret_code + ----------------------- -registerModuleImport :: HomeModules -> String -> Module -> Code -registerModuleImport hmods way mod +registerModuleImport :: PackageId -> String -> Module -> Code +registerModuleImport this_pkg way mod | mod == gHC_PRIM = nopC | otherwise -- Push the init procedure onto the work stack = stmtsC [ CmmAssign spReg (cmmRegOffW spReg (-1)) - , CmmStore (CmmReg spReg) (mkLblExpr (mkModuleInitLabel hmods mod way)) ] + , CmmStore (CmmReg spReg) (mkLblExpr (mkModuleInitLabel this_pkg mod way)) ] \end{code} @@ -261,32 +276,32 @@ style, with the increasing static environment being plumbed as a state variable. \begin{code} -cgTopBinding :: DynFlags -> HomeModules -> (StgBinding,[(Id,[Id])]) -> Code -cgTopBinding dflags hmods (StgNonRec id rhs, srts) +cgTopBinding :: DynFlags -> (StgBinding,[(Id,[Id])]) -> Code +cgTopBinding dflags (StgNonRec id rhs, srts) = do { id' <- maybeExternaliseId dflags id - ; mapM_ (mkSRT hmods [id']) srts + ; mapM_ (mkSRT (thisPackage dflags) [id']) srts ; (id,info) <- cgTopRhs id' rhs ; addBindC id info -- Add the *un-externalised* Id to the envt, -- so we find it when we look up occurrences } -cgTopBinding dflags hmods (StgRec pairs, srts) +cgTopBinding dflags (StgRec pairs, srts) = do { let (bndrs, rhss) = unzip pairs ; bndrs' <- mapFCs (maybeExternaliseId dflags) bndrs ; let pairs' = zip bndrs' rhss - ; mapM_ (mkSRT hmods bndrs') srts + ; mapM_ (mkSRT (thisPackage dflags) bndrs') srts ; _new_binds <- fixC (\ new_binds -> do { addBindsC new_binds ; mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs' }) ; nopC } -mkSRT :: HomeModules -> [Id] -> (Id,[Id]) -> Code -mkSRT hmods these (id,[]) = nopC -mkSRT hmods these (id,ids) +mkSRT :: PackageId -> [Id] -> (Id,[Id]) -> Code +mkSRT this_pkg these (id,[]) = nopC +mkSRT this_pkg these (id,ids) = do { ids <- mapFCs remap ids ; id <- remap id ; emitRODataLits (mkSRTLabel (idName id)) - (map (CmmLabel . mkClosureLabel hmods . idName) ids) + (map (CmmLabel . mkClosureLabel this_pkg . idName) ids) } where -- Sigh, better map all the ids against the environment in @@ -308,8 +323,9 @@ cgTopRhs bndr (StgRhsCon cc con args) cgTopRhs bndr (StgRhsClosure cc bi fvs upd_flag srt args body) = ASSERT(null fvs) -- There should be no free variables - setSRTLabel (mkSRTLabel (idName bndr)) $ - forkStatics (cgTopRhsClosure bndr cc bi srt upd_flag args body) + setSRTLabel (mkSRTLabel (idName bndr)) $ + setSRT srt $ + forkStatics (cgTopRhsClosure bndr cc bi upd_flag args body) \end{code} @@ -327,15 +343,15 @@ which refers to this name). maybeExternaliseId :: DynFlags -> Id -> FCode Id maybeExternaliseId dflags id | dopt Opt_SplitObjs dflags, -- Externalise the name for -split-objs - isInternalName name = do { mod <- moduleName + isInternalName name = do { mod <- getModuleName ; returnFC (setIdName id (externalise mod)) } | otherwise = returnFC id where - externalise mod = mkExternalName uniq mod new_occ Nothing loc + externalise mod = mkExternalName uniq mod new_occ loc name = idName id uniq = nameUnique name new_occ = mkLocalOcc uniq (nameOccName name) - loc = nameSrcLoc name + loc = nameSrcSpan name -- We want to conjure up a name that can't clash with any -- existing name. So we generate -- Mod_$L243foo