%
% (c) The GRASP/AQUA Project, Glasgow University, 1993-2000
%
+
\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( hscMain ) where
+module HscMain
+ ( newHscEnv, hscCmmFile
+ , hscFileCheck
+ , hscParseIdentifier
+#ifdef GHCI
+ , hscStmt, hscTcExpr, hscKcType
+ , compileExpr
+#endif
+ , hscCompileOneShot -- :: Compiler HscStatus
+ , hscCompileBatch -- :: Compiler (HscStatus, ModIface, ModDetails)
+ , hscCompileNothing -- :: Compiler (HscStatus, ModIface, ModDetails)
+ , hscCompileInteractive -- :: Compiler (InteractiveStatus, ModIface, ModDetails)
+ , HscStatus (..)
+ , InteractiveStatus (..)
+ , HscChecked (..)
+ ) where
#include "HsVersions.h"
-import IO ( hPutStr, stderr )
-import HsSyn
+#ifdef GHCI
+import HsSyn ( Stmt(..), LHsExpr, LStmt, LHsType )
+import Module ( Module )
+import CodeOutput ( outputForeignStubs )
+import ByteCodeGen ( byteCodeGen, coreExprToBCOs )
+import Linker ( HValue, linkExpr )
+import CoreTidy ( tidyExpr )
+import CorePrep ( corePrepExpr )
+import Flattening ( flattenExpr )
+import Desugar ( deSugarExpr )
+import SimplCore ( simplifyExpr )
+import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnType )
+import Type ( Type )
+import PrelNames ( iNTERACTIVE )
+import Kind ( Kind )
+import CoreLint ( lintUnfolding )
+import DsMeta ( templateHaskellNames )
+import SrcLoc ( noSrcLoc )
+import VarEnv ( emptyTidyEnv )
+#endif
-import RdrHsSyn ( RdrNameHsModule )
-import FastString ( unpackFS )
-import StringBuffer ( hGetStringBuffer )
-import Parser ( parse )
-import Lex ( PState(..), ParseResult(..) )
+import Var ( Id )
+import Module ( emptyModuleEnv, ModLocation(..) )
+import RdrName ( GlobalRdrEnv, RdrName )
+import HsSyn ( HsModule, LHsBinds, HsGroup, LIE, LImportDecl )
+import SrcLoc ( Located(..) )
+import StringBuffer ( hGetStringBuffer, stringToStringBuffer )
+import Parser
+import Lexer ( P(..), ParseResult(..), mkPState )
import SrcLoc ( mkSrcLoc )
-
-import Rename ( renameModule )
-
-import PrelInfo ( wiredInThings )
-import PrelRules ( builtinRules )
-import MkIface ( writeIface )
-import TcModule ( TcResults(..), typecheckModule )
-import Desugar ( deSugar )
-import SimplCore ( core2core )
-import OccurAnal ( occurAnalyseBinds )
-import CoreUtils ( coreBindsSize )
-import CoreTidy ( tidyCorePgm )
-import CoreToStg ( topCoreBindsToStg )
-import StgSyn ( collectFinalStgBinders )
+import TcRnDriver ( tcRnModule, tcRnExtCore )
+import TcIface ( typecheckIface )
+import TcRnMonad ( initIfaceCheck, TcGblEnv(..) )
+import IfaceEnv ( initNameCache )
+import LoadIface ( ifaceStats, initExternalPackageState )
+import PrelInfo ( wiredInThings, basicKnownKeyNames )
+import MkIface ( checkOldIface, mkIface, writeIfaceFile )
+import Desugar ( deSugar )
+import Flattening ( flatten )
+import SimplCore ( core2core )
+import TidyPgm ( tidyProgram, mkBootModDetails )
+import CorePrep ( corePrepPgm )
+import CoreToStg ( coreToStg )
+import TyCon ( isDataTyCon )
+import Packages ( mkHomeModules )
+import Name ( Name, NamedThing(..) )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
+import CmmParse ( parseCmmFile )
import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleNameUserString )
-import CmdLineOpts
-import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
+import DynFlags
+import ErrUtils
import UniqSupply ( mkSplitUniqSupply )
import Outputable
-import Char ( isSpace )
-import StgInterp ( runStgI )
import HscStats ( ppSourceStats )
+import HscTypes
+import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
+import FastString
+import Maybes ( expectJust )
+import Bag ( unitBag )
+import Monad ( unless )
+import IO
+import DATA_IOREF ( newIORef, readIORef )
\end{code}
%************************************************************************
%* *
-\subsection{The main compiler pipeline}
+ Initialisation
%* *
%************************************************************************
\begin{code}
-data HscResult
- = HscOK ModDetails -- new details (HomeSymbolTable additions)
- (Maybe ModIface) -- new iface (if any compilation was done)
- (Maybe String) -- generated stub_h filename (in /tmp)
- (Maybe String) -- generated stub_c filename (in /tmp)
- (Maybe ([UnlinkedIBind],ItblEnv)) -- interpreted code, if any
- PersistentCompilerState -- updated PCS
-
- | HscFail PersistentCompilerState -- updated PCS
- -- no errors or warnings; the individual passes
- -- (parse/rename/typecheck) print messages themselves
-
-hscMain
- :: DynFlags
- -> ModSummary -- summary, including source filename
- -> Maybe ModIFace -- old interface, if available
- -> String -- file in which to put the output (.s, .hc, .java etc.)
- -> HomeSymbolTable -- for home module ModDetails
- -> PersistentCompilerState -- IN: persistent compiler state
- -> IO HscResult
-
-hscMain dflags core_cmds stg_cmds summary maybe_old_iface
- output_filename mod_details pcs1
- = do
- source_unchanged :: Bool -- extracted from summary?
-
- (pcs2, check_errs, (recomp_reqd, maybe_checked_iface))
- <- checkOldIface dflags finder hit hst pcs1 mod source_unchanged
- maybe_old_iface
-
- -- test check_errs and give up if a problem happened
- what_next = if recomp_reqd then hscRecomp else hscNoRecomp
-
- return $
- what_next dflags core_cmds stg_cmds summary hit hst
- pcs2 maybe_checked_iface
-
-hscNoRecomp = panic "hscNoRecomp"
-
-hscRecomp dflags core_cmds stg_cmds summary hit hst pcs maybe_old_iface
- = do {
- -- what target are we shooting for?
- let toInterp = dopt_HscLang dflags == HscInterpreted;
-
- -- PARSE
- maybe_parsed <- myParseModule dflags summary;
- case maybe_parsed of {
- Nothing -> return (HscFail pcs);
- Just rdr_module -> do {
-
- -- RENAME
- (pcs_rn, maybe_rn_result)
- <- renameModule dflags finder hit hst pcs mod rdr_module;
- case maybe_rn_result of {
- Nothing -> return (HscFail pcs_rn);
- Just (new_iface, rn_hs_decls) -> do {
-
- -- TYPECHECK
- maybe_tc_result
- <- typecheckModule dflags mod pcs_rn hst hit pit rn_hs_decls;
- case maybe_tc_result of {
- Nothing -> return (HscFail pcs_rn);
- Just tc_result -> do {
-
- let pcs_tc = tc_pcs tc_result
- let env_tc = tc_env tc_result
- let binds_tc = tc_binds tc_result
- let local_tycons = tc_tycons tc_result
- let local_classes = tc_classes tc_result
-
- -- DESUGAR, SIMPLIFY, TIDY-CORE
- -- We grab the the unfoldings at this point.
- (tidy_binds, orphan_rules, fe_binders, h_code, c_code) -- return modDetails?
- <- dsThenSimplThenTidy dflags mod tc_result rule_base ds_uniqs
-
- -- CONVERT TO STG
- (stg_binds, cost_centre_info, top_level_ids)
- <- myCoreToStg c2s_uniqs st_uniqs this_mod tidy_binds
-
- -- cook up a new ModDetails now we (finally) have all the bits
- let new_details = completeModDetails tc_env tidy_binds top_level_ids orphan_rules
-
- -- and possibly create a new ModIface
- let maybe_final_iface = completeIface maybe_old_iface new_iface new_details
-
- -- do the rest of code generation/emission
- (maybe_ibinds, maybe_stub_h_filename, maybe_stub_c_filename)
- <- restOfCodeGeneration toInterp
- this_mod imported_modules cost_centre_info
- fe_binders local_tycons local_classes stg_binds
-
- -- and the answer is ...
- return (HscOK new_details maybe_final_iface
- maybe_stub_h_filename maybe_stub_c_filename
- maybe_ibinds pcs_tc)
- }}}}}}}
-
-
-myParseModule dflags summary
- = do -------------------------- Reader ----------------
- show_pass "Parser"
- -- _scc_ "Parser"
-
- let src_filename -- name of the preprocessed source file
- = case ms_ppsource summary of
- Just (filename, fingerprint) -> filename
- Nothing -> pprPanic "myParseModule:summary is not of a source module"
- (ppr summary)
-
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
-
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
-
- PFailed err -> do hPutStrLn stderr (showSDoc err)
- return Nothing
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
-
- dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_module)
- dumpIfSet_dyn dflags Opt_D_source_stats "Source Statistics"
- (ppSourceStats False rdr_module)
-
- return (Just rdr_module)
+newHscEnv :: DynFlags -> IO HscEnv
+newHscEnv dflags
+ = do { eps_var <- newIORef initExternalPackageState
+ ; us <- mkSplitUniqSupply 'r'
+ ; nc_var <- newIORef (initNameCache us knownKeyNames)
+ ; fc_var <- newIORef emptyModuleEnv
+ ; return (HscEnv { hsc_dflags = dflags,
+ hsc_targets = [],
+ hsc_mod_graph = [],
+ hsc_IC = emptyInteractiveContext,
+ hsc_HPT = emptyHomePackageTable,
+ hsc_EPS = eps_var,
+ hsc_NC = nc_var,
+ hsc_FC = fc_var } ) }
+
+
+knownKeyNames :: [Name] -- Put here to avoid loops involving DsMeta,
+ -- where templateHaskellNames are defined
+knownKeyNames = map getName wiredInThings
+ ++ basicKnownKeyNames
+#ifdef GHCI
+ ++ templateHaskellNames
+#endif
+\end{code}
-restOfCodeGeneration toInterp this_mod imported_modules cost_centre_info
- fe_binders local_tycons local_classes stg_binds
- | toInterp
- = return (Nothing, Nothing, stgToInterpSyn stg_binds local_tycons local_classes)
+%************************************************************************
+%* *
+ The main compiler pipeline
+%* *
+%************************************************************************
- | otherwise
- = do -------------------------- Code generation -------------------------------
- show_pass "CodeGen"
- -- _scc_ "CodeGen"
- abstractC <- codeGen this_mod imported_modules
- cost_centre_info fe_binders
- local_tycons local_classes stg_binds
+ --------------------------------
+ The compilation proper
+ --------------------------------
+
+
+It's the task of the compilation proper to compile Haskell, hs-boot and
+core files to either byte-code, hard-code (C, asm, Java, ect) or to
+nothing at all (the module is still parsed and type-checked. This
+feature is mostly used by IDE's and the likes).
+Compilation can happen in either 'one-shot', 'batch', 'nothing',
+or 'interactive' mode. 'One-shot' mode targets hard-code, 'batch' mode
+targets hard-code, 'nothing' mode targets nothing and 'interactive' mode
+targets byte-code.
+The modes are kept separate because of their different types and meanings.
+In 'one-shot' mode, we're only compiling a single file and can therefore
+discard the new ModIface and ModDetails. This is also the reason it only
+targets hard-code; compiling to byte-code or nothing doesn't make sense
+when we discard the result.
+'Batch' mode is like 'one-shot' except that we keep the resulting ModIface
+and ModDetails. 'Batch' mode doesn't target byte-code since that require
+us to return the newly compiled byte-code.
+'Nothing' mode has exactly the same type as 'batch' mode but they're still
+kept separate. This is because compiling to nothing is fairly special: We
+don't output any interface files, we don't run the simplifier and we don't
+generate any code.
+'Interactive' mode is similar to 'batch' mode except that we return the
+compiled byte-code together with the ModIface and ModDetails.
+
+Trying to compile a hs-boot file to byte-code will result in a run-time
+error. This is the only thing that isn't caught by the type-system.
- -------------------------- Code output -------------------------------
- show_pass "CodeOutput"
- -- _scc_ "CodeOutput"
- (maybe_stub_h_name, maybe_stub_c_name)
- <- codeOutput this_mod local_tycons local_classes
- occ_anal_tidy_binds stg_binds2
- c_code h_code abstractC ncg_uniqs
+\begin{code}
- return (maybe_stub_h_name, maybe_stub_c_name, [{-UnlinkedIBind-}])
+data HscChecked
+ = HscChecked
+ -- parsed
+ (Located (HsModule RdrName))
+ -- renamed
+ (Maybe (HsGroup Name,[LImportDecl Name],Maybe [LIE Name]))
+ -- typechecked
+ (Maybe (LHsBinds Id, GlobalRdrEnv, ModDetails))
+
+
+-- Status of a compilation to hard-code or nothing.
+data HscStatus
+ = HscNoRecomp
+ | HscRecomp Bool -- Has stub files.
+ -- This is a hack. We can't compile C files here
+ -- since it's done in DriverPipeline. For now we
+ -- just return True if we want the caller to compile
+ -- it for us.
+
+-- Status of a compilation to byte-code.
+data InteractiveStatus
+ = InteractiveNoRecomp
+ | InteractiveRecomp Bool -- Same as HscStatus
+ CompiledByteCode
+
+
+-- I want Control.Monad.State! --Lemmih 03/07/2006
+newtype Comp a = Comp {runComp :: CompState -> IO (a, CompState)}
+
+instance Monad Comp where
+ g >>= fn = Comp $ \s -> runComp g s >>= \(a,s') -> runComp (fn a) s'
+ return a = Comp $ \s -> return (a,s)
+ fail = error
+
+evalComp :: Comp a -> CompState -> IO a
+evalComp comp st = do (val,_st') <- runComp comp st
+ return val
+
+data CompState
+ = CompState
+ { compHscEnv :: HscEnv
+ , compModSummary :: ModSummary
+ , compOldIface :: Maybe ModIface
+ }
+
+get :: Comp CompState
+get = Comp $ \s -> return (s,s)
+
+gets :: (CompState -> a) -> Comp a
+gets getter = do st <- get
+ return (getter st)
+
+liftIO :: IO a -> Comp a
+liftIO ioA = Comp $ \s -> do a <- ioA
+ return (a,s)
+
+type NoRecomp result = ModIface -> Comp result
+type FrontEnd core = Comp (Maybe core)
+
+-- FIXME: The old interface and module index are only using in 'batch' and
+-- 'interactive' mode. They should be removed from 'oneshot' mode.
+type Compiler result = HscEnv
+ -> ModSummary
+ -> Bool -- True <=> source unchanged
+ -> Maybe ModIface -- Old interface, if available
+ -> Maybe (Int,Int) -- Just (i,n) <=> module i of n (for msgs)
+ -> IO (Maybe result)
+
+
+-- This functions checks if recompilation is necessary and
+-- then combines the FrontEnd and BackEnd to a working compiler.
+hscMkCompiler :: NoRecomp result -- What to do when recompilation isn't required.
+ -> (Maybe (Int,Int) -> Bool -> Comp ())
+ -> FrontEnd core
+ -> (core -> Comp result) -- Backend.
+ -> Compiler result
+hscMkCompiler norecomp messenger frontend backend
+ hsc_env mod_summary source_unchanged
+ mbOldIface mbModIndex
+ = flip evalComp (CompState hsc_env mod_summary mbOldIface) $
+ do (recomp_reqd, mbCheckedIface)
+ <- {-# SCC "checkOldIface" #-}
+ liftIO $ checkOldIface hsc_env mod_summary
+ source_unchanged mbOldIface
+ case mbCheckedIface of
+ Just iface | not recomp_reqd
+ -> do messenger mbModIndex False
+ result <- norecomp iface
+ return (Just result)
+ _otherwise
+ -> do messenger mbModIndex True
+ mbCore <- frontend
+ case mbCore of
+ Nothing
+ -> return Nothing
+ Just core
+ -> do result <- backend core
+ return (Just result)
+
+--------------------------------------------------------------
+-- Compilers
+--------------------------------------------------------------
+
+-- 1 2 3 4 5 6 7 8 9
+-- Compile Haskell, boot and extCore in OneShot mode.
+hscCompileOneShot :: Compiler HscStatus
+hscCompileOneShot hsc_env mod_summary =
+ compiler hsc_env mod_summary
+ where mkComp = hscMkCompiler norecompOneShot oneShotMsg
+ -- How to compile nonBoot files.
+ nonBootComp inp = hscSimplify inp >>= hscNormalIface >>=
+ hscWriteIface >>= hscOneShot
+ -- How to compile boot files.
+ bootComp inp = hscSimpleIface inp >>= hscWriteIface >>= hscConst (HscRecomp False)
+ compiler
+ = case ms_hsc_src mod_summary of
+ ExtCoreFile
+ -> mkComp hscCoreFrontEnd nonBootComp
+ HsSrcFile
+ -> mkComp hscFileFrontEnd nonBootComp
+ HsBootFile
+ -> mkComp hscFileFrontEnd bootComp
+
+-- Compile Haskell, boot and extCore in batch mode.
+hscCompileBatch :: Compiler (HscStatus, ModIface, ModDetails)
+hscCompileBatch hsc_env mod_summary
+ = compiler hsc_env mod_summary
+ where mkComp = hscMkCompiler norecompBatch (batchMsg False)
+ nonBootComp inp = hscSimplify inp >>= hscNormalIface >>=
+ hscWriteIface >>= hscBatch
+ bootComp inp = hscSimpleIface inp >>= hscWriteIface >>= hscNothing
+ compiler
+ = case ms_hsc_src mod_summary of
+ ExtCoreFile
+ -> mkComp hscCoreFrontEnd nonBootComp
+ HsSrcFile
+ -> mkComp hscFileFrontEnd nonBootComp
+ HsBootFile
+ -> mkComp hscFileFrontEnd bootComp
+
+-- Type-check Haskell, boot and extCore.
+-- Does it make sense to compile extCore to nothing?
+hscCompileNothing :: Compiler (HscStatus, ModIface, ModDetails)
+hscCompileNothing hsc_env mod_summary
+ = compiler hsc_env mod_summary
+ where mkComp = hscMkCompiler norecompBatch (batchMsg False)
+ pipeline inp = hscSimpleIface inp >>= hscIgnoreIface >>= hscNothing
+ compiler
+ = case ms_hsc_src mod_summary of
+ ExtCoreFile
+ -> mkComp hscCoreFrontEnd pipeline
+ HsSrcFile
+ -> mkComp hscFileFrontEnd pipeline
+ HsBootFile
+ -> mkComp hscFileFrontEnd pipeline
+
+-- Compile Haskell, extCore to bytecode.
+hscCompileInteractive :: Compiler (InteractiveStatus, ModIface, ModDetails)
+hscCompileInteractive hsc_env mod_summary =
+ hscMkCompiler norecompInteractive (batchMsg True)
+ frontend backend
+ hsc_env mod_summary
+ where backend inp = hscSimplify inp >>= hscNormalIface >>= hscIgnoreIface >>= hscInteractive
+ frontend = case ms_hsc_src mod_summary of
+ ExtCoreFile -> hscCoreFrontEnd
+ HsSrcFile -> hscFileFrontEnd
+ HsBootFile -> panic bootErrorMsg
+ bootErrorMsg = "Compiling a HsBootFile to bytecode doesn't make sense. " ++
+ "Use 'hscCompileBatch' instead."
+
+--------------------------------------------------------------
+-- NoRecomp handlers
+--------------------------------------------------------------
+
+norecompOneShot :: NoRecomp HscStatus
+norecompOneShot old_iface
+ = do hsc_env <- gets compHscEnv
+ liftIO $ do
+ dumpIfaceStats hsc_env
+ return HscNoRecomp
+
+norecompBatch :: NoRecomp (HscStatus, ModIface, ModDetails)
+norecompBatch = norecompWorker HscNoRecomp False
+
+norecompInteractive :: NoRecomp (InteractiveStatus, ModIface, ModDetails)
+norecompInteractive = norecompWorker InteractiveNoRecomp True
+
+norecompWorker :: a -> Bool -> NoRecomp (a, ModIface, ModDetails)
+norecompWorker a isInterp old_iface
+ = do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ liftIO $ do
+ new_details <- {-# SCC "tcRnIface" #-}
+ initIfaceCheck hsc_env $
+ typecheckIface old_iface
+ dumpIfaceStats hsc_env
+ return (a, old_iface, new_details)
+
+--------------------------------------------------------------
+-- Progress displayers.
+--------------------------------------------------------------
+
+oneShotMsg :: Maybe (Int,Int) -> Bool -> Comp ()
+oneShotMsg _mb_mod_index recomp
+ = do hsc_env <- gets compHscEnv
+ liftIO $ do
+ if recomp
+ then return ()
+ else compilationProgressMsg (hsc_dflags hsc_env) $
+ "compilation IS NOT required"
+
+batchMsg :: Bool -> Maybe (Int,Int) -> Bool -> Comp ()
+batchMsg toInterp mb_mod_index recomp
+ = do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ let showMsg msg = compilationProgressMsg (hsc_dflags hsc_env) $
+ (showModuleIndex mb_mod_index ++
+ msg ++ showModMsg (not toInterp) mod_summary)
+ liftIO $ do
+ if recomp
+ then showMsg "Compiling "
+ else showMsg "Skipping "
+
+
+
+--------------------------------------------------------------
+-- FrontEnds
+--------------------------------------------------------------
+
+hscCoreFrontEnd :: FrontEnd ModGuts
+hscCoreFrontEnd =
+ do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ liftIO $ do
+ -------------------
+ -- PARSE
+ -------------------
+ inp <- readFile (ms_hspp_file mod_summary)
+ case parseCore inp 1 of
+ FailP s
+ -> do errorMsg (hsc_dflags hsc_env) (text s{-ToDo: wrong-})
+ return Nothing
+ OkP rdr_module
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ -> do (tc_msgs, maybe_tc_result) <- {-# SCC "TypeCheck" #-}
+ tcRnExtCore hsc_env rdr_module
+ printErrorsAndWarnings (hsc_dflags hsc_env) tc_msgs
+ case maybe_tc_result of
+ Nothing -> return Nothing
+ Just mod_guts -> return (Just mod_guts) -- No desugaring to do!
+
+
+hscFileFrontEnd :: FrontEnd ModGuts
+hscFileFrontEnd =
+ do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ liftIO $ do
+ -------------------
+ -- PARSE
+ -------------------
+ let dflags = hsc_dflags hsc_env
+ hspp_file = ms_hspp_file mod_summary
+ hspp_buf = ms_hspp_buf mod_summary
+ maybe_parsed <- myParseModule dflags hspp_file hspp_buf
+ case maybe_parsed of
+ Left err
+ -> do printBagOfErrors dflags (unitBag err)
+ return Nothing
+ Right rdr_module
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ -> do (tc_msgs, maybe_tc_result)
+ <- {-# SCC "Typecheck-Rename" #-}
+ tcRnModule hsc_env (ms_hsc_src mod_summary) False rdr_module
+ printErrorsAndWarnings dflags tc_msgs
+ case maybe_tc_result of
+ Nothing
+ -> return Nothing
+ Just tc_result
+ -------------------
+ -- DESUGAR
+ -------------------
+ -> do (warns, maybe_ds_result) <- {-# SCC "DeSugar" #-}
+ deSugar hsc_env tc_result
+ printBagOfWarnings dflags warns
+ return maybe_ds_result
+
+--------------------------------------------------------------
+-- Simplifiers
+--------------------------------------------------------------
+
+hscSimplify :: ModGuts -> Comp ModGuts
+hscSimplify ds_result
+ = do hsc_env <- gets compHscEnv
+ liftIO $ do
+ flat_result <- {-# SCC "Flattening" #-}
+ flatten hsc_env ds_result
+ -------------------
+ -- SIMPLIFY
+ -------------------
+ simpl_result <- {-# SCC "Core2Core" #-}
+ core2core hsc_env flat_result
+ return simpl_result
+
+--------------------------------------------------------------
+-- Interface generators
+--------------------------------------------------------------
+
+-- HACK: we return ModGuts even though we know it's not gonna be used.
+-- We do this because the type signature needs to be identical
+-- in structure to the type of 'hscNormalIface'.
+hscSimpleIface :: ModGuts -> Comp (ModIface, Bool, ModDetails, ModGuts)
+hscSimpleIface ds_result
+ = do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ maybe_old_iface <- gets compOldIface
+ liftIO $ do
+ details <- mkBootModDetails hsc_env ds_result
+ (new_iface, no_change)
+ <- {-# SCC "MkFinalIface" #-}
+ mkIface hsc_env maybe_old_iface ds_result details
+ -- And the answer is ...
+ dumpIfaceStats hsc_env
+ return (new_iface, no_change, details, ds_result)
+
+hscNormalIface :: ModGuts -> Comp (ModIface, Bool, ModDetails, CgGuts)
+hscNormalIface simpl_result
+ = do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ maybe_old_iface <- gets compOldIface
+ liftIO $ do
+ -------------------
+ -- TIDY
+ -------------------
+ (cg_guts, details) <- {-# SCC "CoreTidy" #-}
+ tidyProgram hsc_env simpl_result
+
+ -------------------
+ -- BUILD THE NEW ModIface and ModDetails
+ -- and emit external core if necessary
+ -- This has to happen *after* code gen so that the back-end
+ -- info has been set. Not yet clear if it matters waiting
+ -- until after code output
+ (new_iface, no_change)
+ <- {-# SCC "MkFinalIface" #-}
+ mkIface hsc_env maybe_old_iface simpl_result details
+ -- Emit external core
+ emitExternalCore (hsc_dflags hsc_env) cg_guts -- Move this? --Lemmih 03/07/2006
+ dumpIfaceStats hsc_env
+
+ -------------------
+ -- Return the prepared code.
+ return (new_iface, no_change, details, cg_guts)
+
+--------------------------------------------------------------
+-- BackEnd combinators
+--------------------------------------------------------------
+
+hscWriteIface :: (ModIface, Bool, ModDetails, a) -> Comp (ModIface, ModDetails, a)
+hscWriteIface (iface, no_change, details, a)
+ = do mod_summary <- gets compModSummary
+ liftIO $ do
+ unless no_change
+ $ writeIfaceFile (ms_location mod_summary) iface
+ return (iface, details, a)
+
+hscIgnoreIface :: (ModIface, Bool, ModDetails, a) -> Comp (ModIface, ModDetails, a)
+hscIgnoreIface (iface, no_change, details, a)
+ = return (iface, details, a)
+
+-- Don't output any code.
+hscNothing :: (ModIface, ModDetails, a) -> Comp (HscStatus, ModIface, ModDetails)
+hscNothing (iface, details, a)
+ = return (HscRecomp False, iface, details)
+
+-- Generate code and return both the new ModIface and the ModDetails.
+hscBatch :: (ModIface, ModDetails, CgGuts) -> Comp (HscStatus, ModIface, ModDetails)
+hscBatch (iface, details, cgguts)
+ = do hasStub <- hscCompile cgguts
+ return (HscRecomp hasStub, iface, details)
+
+-- Here we don't need the ModIface and ModDetails anymore.
+hscOneShot :: (ModIface, ModDetails, CgGuts) -> Comp HscStatus
+hscOneShot (_, _, cgguts)
+ = do hasStub <- hscCompile cgguts
+ return (HscRecomp hasStub)
+
+-- Compile to hard-code.
+hscCompile :: CgGuts -> Comp Bool
+hscCompile cgguts
+ = do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ liftIO $ do
+ let CgGuts{ -- This is the last use of the ModGuts in a compilation.
+ -- From now on, we just use the bits we need.
+ cg_module = this_mod,
+ cg_binds = core_binds,
+ cg_tycons = tycons,
+ cg_dir_imps = dir_imps,
+ cg_foreign = foreign_stubs,
+ cg_home_mods = home_mods,
+ cg_dep_pkgs = dependencies } = cgguts
+ dflags = hsc_dflags hsc_env
+ location = ms_location mod_summary
+ data_tycons = filter isDataTyCon tycons
+ -- cg_tycons includes newtypes, for the benefit of External Core,
+ -- but we don't generate any code for newtypes
+
+ -------------------
+ -- PREPARE FOR CODE GENERATION
+ -- Do saturation and convert to A-normal form
+ prepd_binds <- {-# SCC "CorePrep" #-}
+ corePrepPgm dflags core_binds data_tycons ;
+ ----------------- Convert to STG ------------------
+ (stg_binds, cost_centre_info)
+ <- {-# SCC "CoreToStg" #-}
+ myCoreToStg dflags home_mods this_mod prepd_binds
+ ------------------ Code generation ------------------
+ abstractC <- {-# SCC "CodeGen" #-}
+ codeGen dflags home_mods this_mod data_tycons
+ foreign_stubs dir_imps cost_centre_info
+ stg_binds
+ ------------------ Code output -----------------------
+ (stub_h_exists,stub_c_exists)
+ <- codeOutput dflags this_mod location foreign_stubs
+ dependencies abstractC
+ return stub_c_exists
+
+hscConst :: b -> a -> Comp b
+hscConst b a = return b
+
+hscInteractive :: (ModIface, ModDetails, CgGuts)
+ -> Comp (InteractiveStatus, ModIface, ModDetails)
+hscInteractive (iface, details, cgguts)
+#ifdef GHCI
+ = do hsc_env <- gets compHscEnv
+ mod_summary <- gets compModSummary
+ liftIO $ do
+ let CgGuts{ -- This is the last use of the ModGuts in a compilation.
+ -- From now on, we just use the bits we need.
+ cg_module = this_mod,
+ cg_binds = core_binds,
+ cg_tycons = tycons,
+ cg_foreign = foreign_stubs } = cgguts
+ dflags = hsc_dflags hsc_env
+ location = ms_location mod_summary
+ data_tycons = filter isDataTyCon tycons
+ -- cg_tycons includes newtypes, for the benefit of External Core,
+ -- but we don't generate any code for newtypes
+
+ -------------------
+ -- PREPARE FOR CODE GENERATION
+ -- Do saturation and convert to A-normal form
+ prepd_binds <- {-# SCC "CorePrep" #-}
+ corePrepPgm dflags core_binds data_tycons ;
+ ----------------- Generate byte code ------------------
+ comp_bc <- byteCodeGen dflags prepd_binds data_tycons
+ ------------------ Create f-x-dynamic C-side stuff ---
+ (istub_h_exists, istub_c_exists)
+ <- outputForeignStubs dflags this_mod location foreign_stubs
+ return (InteractiveRecomp istub_c_exists comp_bc, iface, details)
+#else
+ = panic "GHC not compiled with interpreter"
+#endif
+------------------------------
+
+hscFileCheck :: HscEnv -> ModSummary -> IO (Maybe HscChecked)
+hscFileCheck hsc_env mod_summary = do {
+ -------------------
+ -- PARSE
+ -------------------
+ ; let dflags = hsc_dflags hsc_env
+ hspp_file = ms_hspp_file mod_summary
+ hspp_buf = ms_hspp_buf mod_summary
+
+ ; maybe_parsed <- myParseModule dflags hspp_file hspp_buf
+
+ ; case maybe_parsed of {
+ Left err -> do { printBagOfErrors dflags (unitBag err)
+ ; return Nothing } ;
+ Right rdr_module -> do {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ (tc_msgs, maybe_tc_result)
+ <- _scc_ "Typecheck-Rename"
+ tcRnModule hsc_env (ms_hsc_src mod_summary)
+ True{-save renamed syntax-}
+ rdr_module
+
+ ; printErrorsAndWarnings dflags tc_msgs
+ ; case maybe_tc_result of {
+ Nothing -> return (Just (HscChecked rdr_module Nothing Nothing));
+ Just tc_result -> do
+ let md = ModDetails {
+ md_types = tcg_type_env tc_result,
+ md_exports = tcg_exports tc_result,
+ md_insts = tcg_insts tc_result,
+ md_rules = [panic "no rules"] }
+ -- Rules are CoreRules, not the
+ -- RuleDecls we get out of the typechecker
+ rnInfo = do decl <- tcg_rn_decls tc_result
+ imports <- tcg_rn_imports tc_result
+ let exports = tcg_rn_exports tc_result
+ return (decl,imports,exports)
+ return (Just (HscChecked rdr_module
+ rnInfo
+ (Just (tcg_binds tc_result,
+ tcg_rdr_env tc_result,
+ md))))
+ }}}}
+
+
+hscCmmFile :: DynFlags -> FilePath -> IO Bool
+hscCmmFile dflags filename = do
+ maybe_cmm <- parseCmmFile dflags (mkHomeModules []) filename
+ case maybe_cmm of
+ Nothing -> return False
+ Just cmm -> do
+ codeOutput dflags no_mod no_loc NoStubs [] [cmm]
+ return True
+ where
+ no_mod = panic "hscCmmFile: no_mod"
+ no_loc = ModLocation{ ml_hs_file = Just filename,
+ ml_hi_file = panic "hscCmmFile: no hi file",
+ ml_obj_file = panic "hscCmmFile: no obj file" }
-dsThenSimplThenTidy dflags mod tc_result rule_base ds_uniqs
- = do -------------------------- Desugaring ----------------
- -- _scc_ "DeSugar"
- (desugared, rules, h_code, c_code, fe_binders)
- <- deSugar this_mod ds_uniqs tc_results
- -------------------------- Main Core-language transformations ----------------
- -- _scc_ "Core2Core"
- (simplified, orphan_rules) <- core2core core_cmds desugared rules
+myParseModule dflags src_filename maybe_src_buf
+ = -------------------------- Parser ----------------
+ showPass dflags "Parser" >>
+ {-# SCC "Parser" #-} do
- -- Do the final tidy-up
- (tidy_binds, tidy_orphan_rules)
- <- tidyCorePgm this_mod simplified orphan_rules
-
- return (tidy_binds, tidy_orphan_rules, fe_binders, h_code, c_code)
+ -- sometimes we already have the buffer in memory, perhaps
+ -- because we needed to parse the imports out of it, or get the
+ -- module name.
+ buf <- case maybe_src_buf of
+ Just b -> return b
+ Nothing -> hGetStringBuffer src_filename
+ let loc = mkSrcLoc (mkFastString src_filename) 1 0
+ case unP parseModule (mkPState buf loc dflags) of {
-myCoreToStg c2s_uniqs st_uniqs this_mod tidy_binds
- = do let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds
+ PFailed span err -> return (Left (mkPlainErrMsg span err));
- () <- coreBindsSize occ_anal_tidy_binds `seq` return ()
- -- TEMP: the above call zaps some space usage allocated by the
- -- simplifier, which for reasons I don't understand, persists
- -- thoroughout code generation
+ POk _ rdr_module -> do {
- show_pass "Core2Stg"
- -- _scc_ "Core2Stg"
- let stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_module) ;
+
+ dumpIfSet_dyn dflags Opt_D_source_stats "Source Statistics"
+ (ppSourceStats False rdr_module) ;
+
+ return (Right rdr_module)
+ -- ToDo: free the string buffer later.
+ }}
- show_pass "Stg2Stg"
- -- _scc_ "Stg2Stg"
- (stg_binds2, cost_centre_info) <- stg2stg stg_cmds this_mod st_uniqs stg_binds
- let final_ids = collectFinalStgBinders (map fst stg_binds2)
- return (stg_binds2, cost_centre_info, final_ids)
+myCoreToStg dflags home_mods this_mod prepd_binds
+ = do
+ stg_binds <- {-# SCC "Core2Stg" #-}
+ coreToStg home_mods prepd_binds
-#if 0
--- BEGIN old stuff
- -------------------------- Reader ----------------
- show_pass "Parser" >>
- _scc_ "Parser"
+ (stg_binds2, cost_centre_info) <- {-# SCC "Stg2Stg" #-}
+ stg2stg dflags home_mods this_mod stg_binds
- let src_filename -- name of the preprocessed source file
- = case ms_ppsource summary of
- Just (filename, fingerprint) -> filename
- Nothing -> pprPanic "hscMain:summary is not of a source module"
- (ppr summary)
+ return (stg_binds2, cost_centre_info)
+\end{code}
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+%************************************************************************
+%* *
+\subsection{Compiling a do-statement}
+%* *
+%************************************************************************
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
+When the UnlinkedBCOExpr is linked you get an HValue of type
+ IO [HValue]
+When you run it you get a list of HValues that should be
+the same length as the list of names; add them to the ClosureEnv.
- PFailed err -> return (HscErrs pcs (unitBag err) emptyBag)
+A naked expression returns a singleton Name [it].
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
+ What you type The IO [HValue] that hscStmt returns
+ ------------- ------------------------------------
+ let pat = expr ==> let pat = expr in return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
- dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
+ pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
- dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
- (ppSourceStats False rdr_module) >>
+ expr (of IO type) ==> expr >>= \ v -> return [v]
+ [NB: result not printed] bindings: [it]
+
- -- UniqueSupplies for later use (these are the only lower case uniques)
- mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
- mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
- mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
- mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
- mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
+ expr (of non-IO type,
+ result showable) ==> let v = expr in print v >> return [v]
+ bindings: [it]
- -------------------------- Rename ----------------
- show_pass "Renamer" >>
- _scc_ "Renamer"
+ expr (of non-IO type,
+ result not showable) ==> error
- renameModule dflags finder pcs hst rdr_module
- >>= \ (pcs_rn, maybe_rn_stuff) ->
- case maybe_rn_stuff of {
- Nothing -> -- Hurrah! Renamer reckons that there's no need to
- -- go any further
- reportCompile mod_name "Compilation NOT required!" >>
- return ();
-
- Just (this_mod, rn_mod,
- old_iface, new_iface,
- rn_name_supply, fixity_env,
- imported_modules) ->
- -- Oh well, we've got to recompile for real
+\begin{code}
+#ifdef GHCI
+hscStmt -- Compile a stmt all the way to an HValue, but don't run it
+ :: HscEnv
+ -> String -- The statement
+ -> IO (Maybe (HscEnv, [Name], HValue))
+
+hscStmt hsc_env stmt
+ = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) stmt
+ ; case maybe_stmt of {
+ Nothing -> return Nothing ; -- Parse error
+ Just Nothing -> return Nothing ; -- Empty line
+ Just (Just parsed_stmt) -> do { -- The real stuff
+
+ -- Rename and typecheck it
+ let icontext = hsc_IC hsc_env
+ ; maybe_tc_result <- tcRnStmt hsc_env icontext parsed_stmt
+
+ ; case maybe_tc_result of {
+ Nothing -> return Nothing ;
+ Just (new_ic, bound_names, tc_expr) -> do {
+
+ -- Then desugar, code gen, and link it
+ ; hval <- compileExpr hsc_env iNTERACTIVE
+ (ic_rn_gbl_env new_ic)
+ (ic_type_env new_ic)
+ tc_expr
+
+ ; return (Just (hsc_env{ hsc_IC=new_ic }, bound_names, hval))
+ }}}}}
+
+hscTcExpr -- Typecheck an expression (but don't run it)
+ :: HscEnv
+ -> String -- The expression
+ -> IO (Maybe Type)
+
+hscTcExpr hsc_env expr
+ = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) expr
+ ; let icontext = hsc_IC hsc_env
+ ; case maybe_stmt of {
+ Nothing -> return Nothing ; -- Parse error
+ Just (Just (L _ (ExprStmt expr _ _)))
+ -> tcRnExpr hsc_env icontext expr ;
+ Just other -> do { errorMsg (hsc_dflags hsc_env) (text "not an expression:" <+> quotes (text expr)) ;
+ return Nothing } ;
+ } }
+
+hscKcType -- Find the kind of a type
+ :: HscEnv
+ -> String -- The type
+ -> IO (Maybe Kind)
+
+hscKcType hsc_env str
+ = do { maybe_type <- hscParseType (hsc_dflags hsc_env) str
+ ; let icontext = hsc_IC hsc_env
+ ; case maybe_type of {
+ Just ty -> tcRnType hsc_env icontext ty ;
+ Just other -> do { errorMsg (hsc_dflags hsc_env) (text "not an type:" <+> quotes (text str)) ;
+ return Nothing } ;
+ Nothing -> return Nothing } }
+#endif
+\end{code}
+\begin{code}
+#ifdef GHCI
+hscParseStmt :: DynFlags -> String -> IO (Maybe (Maybe (LStmt RdrName)))
+hscParseStmt = hscParseThing parseStmt
- -------------------------- Typechecking ----------------
- show_pass "TypeCheck" >>
- _scc_ "TypeCheck"
- typecheckModule dflags mod pcs hst hit pit rn_mod
- -- tc_uniqs rn_name_supply
- -- fixity_env rn_mod
- >>= \ maybe_tc_stuff ->
- case maybe_tc_stuff of {
- Nothing -> ghcExit 1; -- Type checker failed
+hscParseType :: DynFlags -> String -> IO (Maybe (LHsType RdrName))
+hscParseType = hscParseThing parseType
+#endif
- Just (tc_results@(TcResults {tc_tycons = local_tycons,
- tc_classes = local_classes,
- tc_insts = inst_info })) ->
+hscParseIdentifier :: DynFlags -> String -> IO (Maybe (Located RdrName))
+hscParseIdentifier = hscParseThing parseIdentifier
+hscParseThing :: Outputable thing
+ => Lexer.P thing
+ -> DynFlags -> String
+ -> IO (Maybe thing)
+ -- Nothing => Parse error (message already printed)
+ -- Just x => success
+hscParseThing parser dflags str
+ = showPass dflags "Parser" >>
+ {-# SCC "Parser" #-} do
- -------------------------- Desugaring ----------------
- _scc_ "DeSugar"
- deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
+ buf <- stringToStringBuffer str
+ let loc = mkSrcLoc FSLIT("<interactive>") 1 0
- -------------------------- Main Core-language transformations ----------------
- _scc_ "Core2Core"
- core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
+ case unP parser (mkPState buf loc dflags) of {
- -- Do the final tidy-up
- tidyCorePgm this_mod
- simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
+ PFailed span err -> do { printError span err;
+ return Nothing };
- -- Run the occurrence analyser one last time, so that
- -- dead binders get dead-binder info. This is exploited by
- -- code generators to avoid spitting out redundant bindings.
- -- The occurrence-zapping in Simplify.simplCaseBinder means
- -- that the Simplifier nukes useful dead-var stuff especially
- -- in case patterns.
- let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in
+ POk _ thing -> do {
- coreBindsSize occ_anal_tidy_binds `seq`
--- TEMP: the above call zaps some space usage allocated by the
--- simplifier, which for reasons I don't understand, persists
--- thoroughout code generation
+ --ToDo: can't free the string buffer until we've finished this
+ -- compilation sweep and all the identifiers have gone away.
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr thing);
+ return (Just thing)
+ }}
+\end{code}
+%************************************************************************
+%* *
+ Desugar, simplify, convert to bytecode, and link an expression
+%* *
+%************************************************************************
+\begin{code}
+#ifdef GHCI
+compileExpr :: HscEnv
+ -> Module -> GlobalRdrEnv -> TypeEnv
+ -> LHsExpr Id
+ -> IO HValue
+
+compileExpr hsc_env this_mod rdr_env type_env tc_expr
+ = do { let { dflags = hsc_dflags hsc_env ;
+ lint_on = dopt Opt_DoCoreLinting dflags }
+
+ -- Desugar it
+ ; ds_expr <- deSugarExpr hsc_env this_mod rdr_env type_env tc_expr
+
+ -- Flatten it
+ ; flat_expr <- flattenExpr hsc_env ds_expr
- -------------------------- Convert to STG code -------------------------------
- show_pass "Core2Stg" >>
- _scc_ "Core2Stg"
- let
- stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
- in
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags flat_expr
- -------------------------- Simplify STG code -------------------------------
- show_pass "Stg2Stg" >>
- _scc_ "Stg2Stg"
- stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; let tidy_expr = tidyExpr emptyTidyEnv simpl_expr
-#ifdef GHCI
- runStgI local_tycons local_classes
- (map fst stg_binds2) >>= \ i_result ->
- putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
- >>
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
-#else
- -------------------------- Interface file -------------------------------
- -- Dump instance decls and type signatures into the interface file
- _scc_ "Interface"
- let
- final_ids = collectFinalStgBinders (map fst stg_binds2)
- in
- writeIface this_mod old_iface new_iface
- local_tycons local_classes inst_info
- final_ids occ_anal_tidy_binds tidy_orphan_rules >>
-
-
- -------------------------- Code generation -------------------------------
- show_pass "CodeGen" >>
- _scc_ "CodeGen"
- codeGen this_mod imported_modules
- cost_centre_info
- fe_binders
- local_tycons local_classes
- stg_binds2 >>= \ abstractC ->
-
-
- -------------------------- Code output -------------------------------
- show_pass "CodeOutput" >>
- _scc_ "CodeOutput"
- codeOutput this_mod local_tycons local_classes
- occ_anal_tidy_binds stg_binds2
- c_code h_code abstractC
- ncg_uniqs >>
-
-
- -------------------------- Final report -------------------------------
- reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
+ -- Lint if necessary
+ -- ToDo: improve SrcLoc
+ ; if lint_on then
+ case lintUnfolding noSrcLoc [] prepd_expr of
+ Just err -> pprPanic "compileExpr" err
+ Nothing -> return ()
+ else
+ return ()
-#endif
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
+ -- link it
+ ; hval <- linkExpr hsc_env bcos
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
--- END old stuff
+ ; return hval
+ }
#endif
\end{code}
%************************************************************************
%* *
-\subsection{Initial persistent state}
+ Statistics on reading interfaces
%* *
%************************************************************************
\begin{code}
-initPersistentCompilerState :: IO PersistentCompilerState
-initPersistentCompilerState
-<<<<<<< HscMain.lhs
- = do prs <- initPersistentRenamerState
- return (
- PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleEnv,
- pcs_PRS = initPersistentRenamerState
- }
- )
-=======
- = PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = initRules,
- pcs_PRS = initPersistentRenamerState }
->>>>>>> 1.12
-
-initPackageDetails :: PackageSymbolTable
-initPackageDetails = extendTypeEnv emptyModuleEnv wiredInThings
-
-initPersistentRenamerState :: IO PersistentRenamerState
- = do ns <- mkSplitUniqSupply 'r'
- return (
- PRS { prsOrig = Orig { origNames = initOrigNames,
- origIParam = emptyFM },
- prsDecls = emptyNameEnv,
- prsInsts = emptyBag,
- prsRules = emptyBag,
- prsNS = ns
- }
- )
-
-initOrigNames :: FiniteMap (ModuleName,OccName) Name
-initOrigNames = grab knownKeyNames `plusFM` grab (map getName wiredInThings)
- where
- grab names = foldl add emptyFM names
- add env name = addToFM env (moduleName (nameModule name), nameOccName name) name
-
-
-initRules :: RuleEnv
-initRules = foldl add emptyVarEnv builtinRules
- where
- add env (name,rule) = extendNameEnv_C add1 env name [rule]
- add1 rules _ = rule : rules
-\end{code}
-
-
-
-\begin{code}
-writeIface this_mod old_iface new_iface
- local_tycons local_classes inst_info
- final_ids tidy_binds tidy_orphan_rules
- =
- if isNothing opt_HiDir && isNothing opt_HiFile
- then return () -- not producing any .hi file
- else
-
- let
- hi_suf = case opt_HiSuf of { Nothing -> "hi"; Just suf -> suf }
- filename = case opt_HiFile of {
- Just f -> f;
- Nothing ->
- case opt_HiDir of {
- Just dir -> dir ++ '/':moduleUserString this_mod
- ++ '.':hi_suf;
- Nothing -> panic "writeIface"
- }}
- in
-
- do maybe_final_iface <- checkIface old_iface full_new_iface
- case maybe_final_iface of {
- Nothing -> when opt_D_dump_rn_trace $
- putStrLn "Interface file unchanged" ; -- No need to update .hi file
-
- Just final_iface ->
-
- do let mod_vers_unchanged = case old_iface of
- Just iface -> pi_vers iface == pi_vers final_iface
- Nothing -> False
- when (mod_vers_unchanged && opt_D_dump_rn_trace) $
- putStrLn "Module version unchanged, but usages differ; hence need new hi file"
-
- if_hdl <- openFile filename WriteMode
- printForIface if_hdl (pprIface final_iface)
- hClose if_hdl
- }
+dumpIfaceStats :: HscEnv -> IO ()
+dumpIfaceStats hsc_env
+ = do { eps <- readIORef (hsc_EPS hsc_env)
+ ; dumpIfSet (dump_if_trace || dump_rn_stats)
+ "Interface statistics"
+ (ifaceStats eps) }
where
- full_new_iface = completeIface new_iface local_tycons local_classes
- inst_info final_ids tidy_binds
- tidy_orphan_rules
+ dflags = hsc_dflags hsc_env
+ dump_rn_stats = dopt Opt_D_dump_rn_stats dflags
+ dump_if_trace = dopt Opt_D_dump_if_trace dflags
\end{code}
-
%************************************************************************
-%* *
-\subsection{Printing the interface}
-%* *
+%* *
+ Progress Messages: Module i of n
+%* *
%************************************************************************
\begin{code}
-pprIface (ParsedIface { pi_mod = mod, pi_vers = mod_vers, pi_orphan = orphan,
- pi_usages = usages, pi_exports = exports,
- pi_fixity = (fix_vers, fixities),
- pi_insts = insts, pi_decls = decls,
- pi_rules = (rule_vers, rules), pi_deprecs = deprecs })
- = vcat [ ptext SLIT("__interface")
- <+> doubleQuotes (ptext opt_InPackage)
- <+> ppr mod <+> ppr mod_vers <+> pp_sub_vers
- <+> (if orphan then char '!' else empty)
- <+> int opt_HiVersion
- <+> ptext SLIT("where")
- , vcat (map pprExport exports)
- , vcat (map pprUsage usages)
- , pprFixities fixities
- , vcat [ppr i <+> semi | i <- insts]
- , vcat [ppr_vers v <+> ppr d <> semi | (v,d) <- decls]
- , pprRules rules
- , pprDeprecs deprecs
- ]
- where
- ppr_vers v | v == initialVersion = empty
- | otherwise = int v
- pp_sub_vers
- | fix_vers == initialVersion && rule_vers == initialVersion = empty
- | otherwise = brackets (ppr fix_vers <+> ppr rule_vers)
-\end{code}
-
-When printing export lists, we print like this:
- Avail f f
- AvailTC C [C, x, y] C(x,y)
- AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
-
-\begin{code}
-pprExport :: ExportItem -> SDoc
-pprExport (mod, items)
- = hsep [ ptext SLIT("__export "), ppr mod, hsep (map upp_avail items) ] <> semi
- where
- upp_avail :: RdrAvailInfo -> SDoc
- upp_avail (Avail name) = pprOccName name
- upp_avail (AvailTC name []) = empty
- upp_avail (AvailTC name ns) = hcat [pprOccName name, bang, upp_export ns']
- where
- bang | name `elem` ns = empty
- | otherwise = char '|'
- ns' = filter (/= name) ns
-
- upp_export [] = empty
- upp_export names = braces (hsep (map pprOccName names))
-\end{code}
-
-
-\begin{code}
-pprUsage :: ImportVersion OccName -> SDoc
-pprUsage (m, has_orphans, is_boot, whats_imported)
- = hsep [ptext SLIT("import"), pprModuleName m,
- pp_orphan, pp_boot,
- upp_import_versions whats_imported
- ] <> semi
- where
- pp_orphan | has_orphans = char '!'
- | otherwise = empty
- pp_boot | is_boot = char '@'
- | otherwise = empty
-
- -- Importing the whole module is indicated by an empty list
- upp_import_versions NothingAtAll = empty
- upp_import_versions (Everything v) = dcolon <+> int v
- upp_import_versions (Specifically vm vf vr nvs)
- = dcolon <+> int vm <+> int vf <+> int vr <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
+showModuleIndex Nothing = ""
+showModuleIndex (Just (i,n)) = "[" ++ padded ++ " of " ++ n_str ++ "] "
+ where
+ n_str = show n
+ i_str = show i
+ padded = replicate (length n_str - length i_str) ' ' ++ i_str
\end{code}
-
-\begin{code}
-pprFixities [] = empty
-pprFixities fixes = hsep (map ppr fixes) <> semi
-
-pprRules [] = empty
-pprRules rules = hsep [ptext SLIT("{-## __R"), hsep (map ppr rules), ptext SLIT("##-}")]
-
-pprDeprecs [] = empty
-pprDeprecs deps = hsep [ ptext SLIT("{-## __D"), guts, ptext SLIT("##-}")]
- where
- guts = hsep [ ppr ie <+> doubleQuotes (ppr txt) <> semi
- | Deprecation ie txt _ <- deps ]
-\end{code}
-
-
projects / ghc-hetmet.git / blobdiff