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Diffstat (limited to 'compiler/codeGen/CodeGen.lhs')
| -rw-r--r-- | compiler/codeGen/CodeGen.lhs | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/compiler/codeGen/CodeGen.lhs b/compiler/codeGen/CodeGen.lhs deleted file mode 100644 index 311f947248..0000000000 --- a/compiler/codeGen/CodeGen.lhs +++ /dev/null @@ -1,234 +0,0 @@ -% -% (c) The University of Glasgow 2006 -% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998 -% - -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. - -\begin{code} - -module CodeGen ( codeGen ) where - -#include "HsVersions.h" - --- Required 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 CgProf -import CgMonad -import CgBindery -import CgClosure -import CgCon -import CgUtils -import CgHpc - -import CLabel -import OldCmm -import OldPprCmm () - -import StgSyn -import PrelNames -import DynFlags - -import HscTypes -import CostCentre -import Id -import Name -import TyCon -import Module -import ErrUtils -import Panic -import Outputable -import Util - -import OrdList -import Stream (Stream, liftIO) -import qualified Stream - -import Data.IORef - -codeGen :: DynFlags - -> Module -- Module we are compiling - -> [TyCon] -- Type constructors - -> CollectedCCs -- (Local/global) cost-centres needing declaring/registering. - -> [(StgBinding,[(Id,[Id])])] -- Bindings to convert, with SRTs - -> HpcInfo -- Profiling info - -> Stream IO CmmGroup () - -- N.B. returning '[Cmm]' and not 'Cmm' here makes it - -- possible for object splitting to split up the - -- pieces later. - -codeGen dflags this_mod data_tycons cost_centre_info stg_binds hpc_info - - = do { liftIO $ showPass dflags "CodeGen" - - ; cgref <- liftIO $ newIORef =<< initC - ; let cg :: FCode CmmGroup -> Stream IO CmmGroup () - cg fcode = do - cmm <- liftIO $ do - st <- readIORef cgref - let (a,st') = runC dflags this_mod st fcode - - dumpIfSet_dyn dflags Opt_D_dump_cmm "Cmm" $ ppr a - - -- NB. stub-out cgs_tops and cgs_stmts. This fixes - -- a big space leak. DO NOT REMOVE! - writeIORef cgref $! st'{ cgs_tops = nilOL, - cgs_stmts = nilOL } - return a - Stream.yield cmm - - ; cg (getCmm $ mkModuleInit dflags cost_centre_info this_mod hpc_info) - - ; mapM_ (cg . getCmm . cgTopBinding dflags) stg_binds - - ; mapM_ (cg . cgTyCon) data_tycons - } - -mkModuleInit - :: DynFlags - -> CollectedCCs -- cost centre info - -> Module - -> HpcInfo - -> Code - -mkModuleInit dflags cost_centre_info this_mod hpc_info - = do { -- Allocate the static boolean that records if this - ; whenC (dopt Opt_Hpc dflags) $ - hpcTable this_mod hpc_info - - ; whenC (dopt Opt_SccProfilingOn dflags) $ do - initCostCentres cost_centre_info - - -- For backwards compatibility: user code may refer to this - -- label for calling hs_add_root(). - ; emitDecl (CmmData Data (Statics (mkPlainModuleInitLabel this_mod) [])) - - ; whenC (this_mod == mainModIs dflags) $ - emitSimpleProc (mkPlainModuleInitLabel rOOT_MAIN) $ return () - } -\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} -initCostCentres :: CollectedCCs -> Code --- Emit the declarations, and return code to register them -initCostCentres (local_CCs, ___extern_CCs, singleton_CCSs) - = do dflags <- getDynFlags - if not (dopt Opt_SccProfilingOn dflags) - then nopC - else do mapM_ emitCostCentreDecl local_CCs - mapM_ emitCostCentreStackDecl singleton_CCSs -\end{code} - -%************************************************************************ -%* * -\subsection[codegen-top-bindings]{Converting top-level STG bindings} -%* * -%************************************************************************ - -@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. - -In the code below, the static bindings are accumulated in the -@MkCgState@, and transferred into the ``statics'' slot by @forkStatics@. -This is so that we can write the top level processing in a compositional -style, with the increasing static environment being plumbed as a state -variable. - -\begin{code} -cgTopBinding :: DynFlags -> (StgBinding,[(Id,[Id])]) -> Code -cgTopBinding dflags (StgNonRec id rhs, srts) - = do { id' <- maybeExternaliseId dflags id - ; mapM_ (mkSRT [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 (StgRec pairs, srts) - = do { let (bndrs, rhss) = unzip pairs - ; bndrs' <- mapFCs (maybeExternaliseId dflags) bndrs - ; let pairs' = zip bndrs' rhss - ; mapM_ (mkSRT bndrs') srts - ; _new_binds <- fixC (\ new_binds -> do - { addBindsC new_binds - ; mapFCs ( \ (b,e) -> cgTopRhs b e ) pairs' }) - ; nopC } - -mkSRT :: [Id] -> (Id,[Id]) -> Code -mkSRT _ (_,[]) = nopC -mkSRT these (id,ids) - = do { ids <- mapFCs remap ids - ; id <- remap id - ; emitRODataLits "CodeGen.mkSRT" (mkSRTLabel (idName id) (idCafInfo id)) - (map (\id -> CmmLabel $ mkClosureLabel (idName id) (idCafInfo id)) 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 - (id':_) -> returnFC id' - [] -> do { info <- getCgIdInfo id; return (cgIdInfoId info) } - --- 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... - -- It's already been externalised if necessary - -cgTopRhs bndr (StgRhsCon _cc con args) - = forkStatics (cgTopRhsCon bndr 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) (idCafInfo bndr)) $ - setSRT srt $ - forkStatics (cgTopRhsClosure bndr cc bi upd_flag args body) -\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 :: DynFlags -> Id -> FCode Id -maybeExternaliseId dflags id - | dopt Opt_SplitObjs dflags, -- Externalise the name for -split-objs - isInternalName name = do { mod <- getModuleName - ; returnFC (setIdName id (externalise mod)) } - | otherwise = returnFC id - where - externalise mod = mkExternalName uniq mod new_occ loc - name = idName id - uniq = nameUnique name - new_occ = mkLocalOcc uniq (nameOccName name) - loc = nameSrcSpan 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. -\end{code} |