\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( HscResult(..), hscMain,
+module HscMain
+ ( newHscEnv, hscCmmFile
+ , hscFileCheck
+ , hscParseIdentifier
#ifdef GHCI
- hscStmt, hscThing, hscModuleContents,
+ , hscStmt, hscTcExpr, hscKcType
+ , compileExpr
#endif
- initPersistentCompilerState ) where
+ , 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"
#ifdef GHCI
-import Interpreter
-import ByteCodeGen ( byteCodeGen )
-import CoreTidy ( tidyCoreExpr )
+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 Rename ( renameStmt, renameRdrName, slurpIface )
-import RdrName ( rdrNameOcc, setRdrNameOcc )
-import RdrHsSyn ( RdrNameStmt )
-import OccName ( dataName, tcClsName,
- occNameSpace, setOccNameSpace )
+import Flattening ( flattenExpr )
+import Desugar ( deSugarExpr )
+import SimplCore ( simplifyExpr )
+import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnType )
import Type ( Type )
-import Id ( Id, idName, setGlobalIdDetails )
-import IdInfo ( GlobalIdDetails(VanillaGlobal) )
-import Name ( isLocalName )
-import NameEnv ( lookupNameEnv )
-import Module ( lookupModuleEnv )
-import RdrName ( rdrEnvElts )
import PrelNames ( iNTERACTIVE )
-import StringBuffer ( stringToStringBuffer )
-import FastString ( mkFastString )
-import Maybes ( catMaybes )
-
-import List ( nub )
+import Kind ( Kind )
+import CoreLint ( lintUnfolding )
+import DsMeta ( templateHaskellNames )
+import SrcLoc ( noSrcLoc )
+import VarEnv ( emptyTidyEnv )
#endif
-import HsSyn
-
-import RdrName ( mkRdrOrig )
-import Id ( idName )
-import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
-import StringBuffer ( hGetStringBuffer, freeStringBuffer )
+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 Lex ( PState(..), ParseResult(..) )
+import Lexer ( P(..), ParseResult(..), mkPState )
import SrcLoc ( mkSrcLoc )
-import Finder ( findModule )
-import Rename ( checkOldIface, renameModule, closeIfaceDecls )
-import Rules ( emptyRuleBase )
-import PrelInfo ( wiredInThingEnv, wiredInThings )
-import PrelRules ( builtinRules )
-import PrelNames ( knownKeyNames )
-import MkIface ( mkFinalIface )
-import TcModule
-import InstEnv ( emptyInstEnv )
-import Desugar
-import SimplCore
-import CoreUtils ( coreBindsSize )
-import CoreTidy ( tidyCorePgm )
+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 StgSyn
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, moduleName, mkHomeModule )
-import CmdLineOpts
-import DriverState ( v_HCHeader )
-import ErrUtils ( dumpIfSet_dyn, showPass, printError )
-import Util ( unJust )
+import DynFlags
+import ErrUtils
import UniqSupply ( mkSplitUniqSupply )
-import Bag ( consBag, emptyBag )
import Outputable
import HscStats ( ppSourceStats )
import HscTypes
-import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
-import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName, isGlobalName )
-import NameEnv ( emptyNameEnv, mkNameEnv )
-import Module ( Module )
-
-import IOExts ( newIORef, readIORef, writeIORef,
- unsafePerformIO )
-
-import Monad ( when )
-import Maybe ( isJust, fromJust )
-import IO
-
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
- -- compilation failed
- = HscFail PersistentCompilerState -- updated PCS
- -- concluded that it wasn't necessary
- | HscNoRecomp PersistentCompilerState -- updated PCS
- ModDetails -- new details (HomeSymbolTable additions)
- ModIface -- new iface (if any compilation was done)
- -- did recompilation
- | HscRecomp PersistentCompilerState -- updated PCS
- ModDetails -- new details (HomeSymbolTable additions)
- ModIface -- new iface (if any compilation was done)
- Bool -- stub_h exists
- Bool -- stub_c exists
+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
- (Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any
-#else
- (Maybe ()) -- no interpreted code whatsoever
+ ++ templateHaskellNames
#endif
+\end{code}
- -- no errors or warnings; the individual passes
- -- (parse/rename/typecheck) print messages themselves
-
-hscMain
- :: GhciMode
- -> DynFlags
- -> Module
- -> ModuleLocation -- location info
- -> Bool -- True <=> source unchanged
- -> Bool -- True <=> have an object file (for msgs only)
- -> Maybe ModIface -- old interface, if available
- -> HomeSymbolTable -- for home module ModDetails
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
- -> IO HscResult
-
-hscMain ghci_mode dflags mod location source_unchanged have_object
- maybe_old_iface hst hit pcs
- = {-# SCC "hscMain" #-}
- do {
- showPass dflags ("Checking old interface for hs = "
- ++ show (ml_hs_file location)
- ++ ", hspp = " ++ show (ml_hspp_file location));
-
- (pcs_ch, errs_found, (recomp_reqd, maybe_checked_iface))
- <- _scc_ "checkOldIface"
- checkOldIface ghci_mode dflags hit hst pcs mod (ml_hi_file location)
- source_unchanged maybe_old_iface;
-
- if errs_found then
- return (HscFail pcs_ch)
- else do {
-
- let no_old_iface = not (isJust maybe_checked_iface)
- what_next | recomp_reqd || no_old_iface = hscRecomp
- | otherwise = hscNoRecomp
- ;
- what_next ghci_mode dflags have_object mod location
- maybe_checked_iface hst hit pcs_ch
- }}
+%************************************************************************
+%* *
+ The main compiler pipeline
+%* *
+%************************************************************************
--- we definitely expect to have the old interface available
-hscNoRecomp ghci_mode dflags have_object
- mod location (Just old_iface) hst hit pcs_ch
- | ghci_mode == OneShot
- = do {
- when (verbosity dflags > 0) $
- hPutStrLn stderr "compilation IS NOT required";
- let { bomb = panic "hscNoRecomp:OneShot" };
- return (HscNoRecomp pcs_ch bomb bomb)
- }
- | otherwise
- = do {
- when (verbosity dflags >= 1) $
- hPutStrLn stderr ("Skipping " ++
- showModMsg have_object mod location);
-
- -- CLOSURE
- (pcs_cl, closure_errs, cl_hs_decls)
- <- closeIfaceDecls dflags hit hst pcs_ch old_iface ;
- if closure_errs then
- return (HscFail pcs_cl)
- else do {
-
- -- TYPECHECK
- maybe_tc_result
- <- typecheckIface dflags pcs_cl hst old_iface cl_hs_decls;
-
- case maybe_tc_result of {
- Nothing -> return (HscFail pcs_cl);
- Just (pcs_tc, new_details) ->
-
- return (HscNoRecomp pcs_tc new_details old_iface)
- }}}
-
-hscRecomp ghci_mode dflags have_object
- mod location maybe_checked_iface hst hit pcs_ch
- = do {
- -- what target are we shooting for?
- ; let toInterp = dopt_HscLang dflags == HscInterpreted
- ; let toNothing = dopt_HscLang dflags == HscNothing
-
- ; when (ghci_mode /= OneShot && verbosity dflags >= 1) $
- hPutStrLn stderr ("Compiling " ++
- showModMsg (not toInterp) mod location);
+ --------------------------------
+ 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.
- -------------------
- -- PARSE
- -------------------
- ; maybe_parsed <- myParseModule dflags
- (unJust "hscRecomp:hspp" (ml_hspp_file location))
- ; case maybe_parsed of {
- Nothing -> return (HscFail pcs_ch);
- Just rdr_module -> do {
- ; let this_mod = mkHomeModule (hsModuleName rdr_module)
-
- -------------------
- -- RENAME
- -------------------
- ; (pcs_rn, print_unqual, maybe_rn_result)
- <- _scc_ "Rename"
- renameModule dflags ghci_mode hit hst pcs_ch this_mod rdr_module
- ; case maybe_rn_result of {
- Nothing -> return (HscFail pcs_ch);
- Just (dont_discard, new_iface, rn_result) -> do {
+\begin{code}
+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 HscNoRecomp) 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.
+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 :: a -> NoRecomp a
+norecompOneShot a old_iface
+ = do hsc_env <- gets compHscEnv
+ liftIO $ do
+ dumpIfaceStats hsc_env
+ return a
+
+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 (expectJust "hscCoreFrontEnd" (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 = expectJust "hscFileFrontEnd" (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
-------------------
- -- TYPECHECK
- -------------------
- ; maybe_tc_result
- <- _scc_ "TypeCheck"
- typecheckModule dflags pcs_rn hst print_unqual rn_result
- ; case maybe_tc_result of {
- Nothing -> return (HscFail pcs_ch);
- Just (pcs_tc, tc_result) -> do {
-
- -------------------
- -- DESUGAR
+ -- TIDY
-------------------
- ; (ds_details, foreign_stuff)
- <- _scc_ "DeSugar"
- deSugar dflags pcs_tc hst this_mod print_unqual tc_result
-
- ; pcs_middle
- <- _scc_ "pcs_middle"
- if ghci_mode == OneShot
- then do init_pcs <- initPersistentCompilerState
- init_prs <- initPersistentRenamerState
- let
- rules = pcs_rules pcs_tc
- orig_tc = prsOrig (pcs_PRS pcs_tc)
- new_prs = init_prs{ prsOrig=orig_tc }
-
- orig_tc `seq` rules `seq` new_prs `seq`
- return init_pcs{ pcs_PRS = new_prs,
- pcs_rules = rules }
- else return pcs_tc
-
- -- alive at this point:
- -- pcs_middle
- -- foreign_stuff
- -- ds_details
- -- new_iface
+ (cg_guts, details) <- {-# SCC "CoreTidy" #-}
+ tidyProgram hsc_env simpl_result
-------------------
- -- SIMPLIFY
- -------------------
- ; simpl_details
- <- _scc_ "Core2Core"
- core2core dflags pcs_middle hst dont_discard ds_details
+ -- 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
-------------------
- -- TIDY
- -------------------
- ; cg_info_ref <- newIORef Nothing ;
- ; let cg_info :: CgInfoEnv
- cg_info = unsafePerformIO $ do {
- maybe_cg_env <- readIORef cg_info_ref ;
- case maybe_cg_env of
- Just env -> return env
- Nothing -> do { printError "Urk! Looked at CgInfo too early!";
- return emptyNameEnv } }
- -- cg_info_ref will be filled in just after restOfCodeGeneration
- -- Meanwhile, tidyCorePgm is careful not to look at cg_info!
-
- ; (pcs_simpl, tidy_details)
- <- _scc_ "CoreTidy"
- tidyCorePgm dflags this_mod pcs_middle cg_info simpl_details
-
- ; pcs_final <- if ghci_mode == OneShot then initPersistentCompilerState
- else return pcs_simpl
-
- -- alive at this point:
- -- tidy_details
- -- new_iface
-
- ; emitExternalCore dflags new_iface tidy_details
+ -- 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
- ; let final_details = tidy_details {md_binds = []}
- ; final_details `seq` return ()
+------------------------------
+hscFileCheck :: HscEnv -> ModSummary -> IO (Maybe HscChecked)
+hscFileCheck hsc_env mod_summary = do {
-------------------
- -- PREPARE FOR CODE GENERATION
+ -- PARSE
-------------------
- -- Do saturation and convert to A-normal form
- ; prepd_details <- _scc_ "CorePrep"
- corePrepPgm dflags tidy_details
+ ; let dflags = hsc_dflags hsc_env
+ hspp_file = expectJust "hscFileFrontEnd" (ms_hspp_file mod_summary)
+ hspp_buf = ms_hspp_buf mod_summary
- -------------------
- -- CONVERT TO STG and COMPLETE CODE GENERATION
- -------------------
- ; let
- ModDetails{md_binds=binds, md_types=env_tc} = prepd_details
+ ; maybe_parsed <- myParseModule dflags hspp_file hspp_buf
- local_tycons = typeEnvTyCons env_tc
- local_classes = typeEnvClasses env_tc
+ ; case maybe_parsed of {
+ Left err -> do { printBagOfErrors dflags (unitBag err)
+ ; return Nothing } ;
+ Right rdr_module -> do {
- imported_module_names = map ideclName (hsModuleImports rdr_module)
+ -------------------
+ -- 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
- mod_name_to_Module nm
- = do m <- findModule nm ; return (fst (fromJust m))
+ ; 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" }
- (h_code, c_code, headers, fe_binders) = foreign_stuff
- -- turn the list of headers requested in foreign import
- -- declarations into a string suitable for emission into generated
- -- C code...
- --
- foreign_headers =
- unlines
- . map (\fname -> "#include \"" ++ _UNPK_ fname ++ "\"")
- . reverse
- $ headers
+myParseModule dflags src_filename maybe_src_buf
+ = -------------------------- Parser ----------------
+ showPass dflags "Parser" >>
+ {-# SCC "Parser" #-} do
- -- ...and add the string to the headers requested via command line
- -- options
- --
- ; fhdrs <- readIORef v_HCHeader
- ; writeIORef v_HCHeader (fhdrs ++ foreign_headers)
+ -- 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
- ; imported_modules <- mapM mod_name_to_Module imported_module_names
+ let loc = mkSrcLoc (mkFastString src_filename) 1 0
- ; (stub_h_exists, stub_c_exists, maybe_bcos, final_iface )
- <- if toInterp
-#ifdef GHCI
- then do
- ----------------- Generate byte code ------------------
- (bcos,itbl_env) <- byteCodeGen dflags binds
- local_tycons local_classes
+ case unP parseModule (mkPState buf loc dflags) of {
- -- Fill in the code-gen info
- writeIORef cg_info_ref (Just emptyNameEnv)
+ PFailed span err -> return (Left (mkPlainErrMsg span err));
- ------------------ BUILD THE NEW ModIface ------------
- final_iface <- _scc_ "MkFinalIface"
- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface tidy_details
-
- return ( False, False, Just (bcos,itbl_env), final_iface )
-#else
- then error "GHC not compiled with interpreter"
-#endif
-
- else do
- ----------------- Convert to STG ------------------
- (stg_binds, cost_centre_info, stg_back_end_info)
- <- _scc_ "CoreToStg"
- myCoreToStg dflags this_mod binds
-
- -- Fill in the code-gen info for the earlier tidyCorePgm
- writeIORef cg_info_ref (Just stg_back_end_info)
-
- ------------------ BUILD THE NEW ModIface ------------
- final_iface <- _scc_ "MkFinalIface"
- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface tidy_details
- if toNothing
- then do
- return (False, False, Nothing, final_iface)
- else do
- ------------------ Code generation ------------------
- abstractC <- _scc_ "CodeGen"
- codeGen dflags this_mod imported_modules
- cost_centre_info fe_binders
- local_tycons stg_binds
-
- ------------------ Code output -----------------------
- (stub_h_exists, stub_c_exists)
- <- codeOutput dflags this_mod [] --local_tycons
- binds stg_binds
- c_code h_code abstractC
-
- return (stub_h_exists, stub_c_exists, Nothing, final_iface)
-
- -- and the answer is ...
- ; return (HscRecomp pcs_final
- final_details
- final_iface
- stub_h_exists stub_c_exists
- maybe_bcos)
- }}}}}}}
-
-myParseModule dflags src_filename
- = do -------------------------- Parser ----------------
- showPass dflags "Parser"
- _scc_ "Parser" do
-
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
-
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parseModule buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc (_PK_ src_filename) 1 } of {
-
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
- freeStringBuffer buf;
- return Nothing };
-
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do {
+ POk _ rdr_module -> do {
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)
+ return (Right rdr_module)
-- ToDo: free the string buffer later.
}}
-myCoreToStg dflags this_mod tidy_binds
+myCoreToStg dflags home_mods this_mod prepd_binds
= do
- () <- coreBindsSize 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 -- JRS
- --
- -- This is still necessary. -- SDM (10 Dec 2001)
-
- stg_binds <- _scc_ "Core2Stg"
- coreToStg dflags tidy_binds
-
- (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
- stg2stg dflags this_mod stg_binds
-
- let env_rhs :: CgInfoEnv
- env_rhs = mkNameEnv [ caf_info `seq` (idName bndr, CgInfo caf_info)
- | (bind,_) <- stg_binds2,
- let caf_info
- | stgBindHasCafRefs bind = MayHaveCafRefs
- | otherwise = NoCafRefs,
- bndr <- stgBinders bind ]
-
- return (stg_binds2, cost_centre_info, env_rhs)
+ stg_binds <- {-# SCC "Core2Stg" #-}
+ coreToStg home_mods prepd_binds
+
+ (stg_binds2, cost_centre_info) <- {-# SCC "Stg2Stg" #-}
+ stg2stg dflags home_mods this_mod stg_binds
+
+ return (stg_binds2, cost_centre_info)
\end{code}
%* *
%************************************************************************
-\begin{code}
-#ifdef GHCI
-hscStmt
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
- -> InteractiveContext -- Context for compiling
- -> String -- The statement
- -> Bool -- just treat it as an expression
- -> IO ( PersistentCompilerState,
- Maybe ( [Id],
- Type,
- UnlinkedBCOExpr) )
-\end{code}
-
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
result not showable) ==> error
\begin{code}
-hscStmt dflags hst hit pcs0 icontext stmt just_expr
- = do { maybe_stmt <- hscParseStmt dflags stmt
- ; case maybe_stmt of
- Nothing -> return (pcs0, Nothing)
- Just parsed_stmt -> do {
-
- let { notExprStmt (ExprStmt _ _ _) = False;
- notExprStmt _ = True
- };
-
- if (just_expr && notExprStmt parsed_stmt)
- then do hPutStrLn stderr ("not an expression: `" ++ stmt ++ "'")
- return (pcs0, Nothing)
- else do {
-
- -- Rename it
- (pcs1, print_unqual, maybe_renamed_stmt)
- <- renameStmt dflags hit hst pcs0 icontext parsed_stmt
-
- ; case maybe_renamed_stmt of
- Nothing -> return (pcs0, Nothing)
- Just (bound_names, rn_stmt) -> do {
-
- -- Typecheck it
- maybe_tc_return <-
- if just_expr
- then case rn_stmt of { (ExprStmt e _ _, decls) ->
- typecheckExpr dflags pcs1 hst (ic_type_env icontext)
- print_unqual iNTERACTIVE (e,decls) }
- else typecheckStmt dflags pcs1 hst (ic_type_env icontext)
- print_unqual iNTERACTIVE bound_names rn_stmt
-
- ; case maybe_tc_return of
- Nothing -> return (pcs0, Nothing)
- Just (pcs2, tc_expr, bound_ids, ty) -> do {
-
- -- Desugar it
- ds_expr <- deSugarExpr dflags pcs2 hst iNTERACTIVE print_unqual tc_expr
-
- -- Simplify it
- ; simpl_expr <- simplifyExpr dflags pcs2 hst ds_expr
+#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))
- -- Tidy it (temporary, until coreSat does cloning)
- ; tidy_expr <- tidyCoreExpr simpl_expr
+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
- -- Prepare for codegen
- ; prepd_expr <- corePrepExpr dflags tidy_expr
+ -- Rename and typecheck it
+ let icontext = hsc_IC hsc_env
+ ; maybe_tc_result <- tcRnStmt hsc_env icontext parsed_stmt
- -- Convert to BCOs
- ; bcos <- coreExprToBCOs dflags prepd_expr
+ ; 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}
- ; let
- -- Make all the bound ids "global" ids, now that
- -- they're notionally top-level bindings. This is
- -- important: otherwise when we come to compile an expression
- -- using these ids later, the byte code generator will consider
- -- the occurrences to be free rather than global.
- global_bound_ids = map globaliseId bound_ids;
- globaliseId id = setGlobalIdDetails id VanillaGlobal
+\begin{code}
+#ifdef GHCI
+hscParseStmt :: DynFlags -> String -> IO (Maybe (Maybe (LStmt RdrName)))
+hscParseStmt = hscParseThing parseStmt
- ; return (pcs2, Just (global_bound_ids, ty, bcos))
+hscParseType :: DynFlags -> String -> IO (Maybe (LHsType RdrName))
+hscParseType = hscParseThing parseType
+#endif
- }}}}}
+hscParseIdentifier :: DynFlags -> String -> IO (Maybe (Located RdrName))
+hscParseIdentifier = hscParseThing parseIdentifier
-hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
-hscParseStmt dflags str
- = do -------------------------- Parser ----------------
- showPass dflags "Parser"
- _scc_ "Parser" do
+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
buf <- stringToStringBuffer str
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parseStmt buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<interactive>") 1 } of {
+ let loc = mkSrcLoc FSLIT("<interactive>") 1 0
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
--- Not yet implemented in <4.11 freeStringBuffer buf;
- return Nothing };
+ case unP parser (mkPState buf loc dflags) of {
- -- no stmt: the line consisted of just space or comments
- POk _ Nothing -> return Nothing;
+ PFailed span err -> do { printError span err;
+ return Nothing };
- POk _ (Just rdr_stmt) -> do {
+ POk _ thing -> do {
--ToDo: can't free the string buffer until we've finished this
-- compilation sweep and all the identifiers have gone away.
- --freeStringBuffer buf;
- dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_stmt);
- return (Just rdr_stmt)
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr thing);
+ return (Just thing)
}}
-#endif
\end{code}
%************************************************************************
%* *
-\subsection{Getting information about an identifer}
+ Desugar, simplify, convert to bytecode, and link an expression
%* *
%************************************************************************
\begin{code}
#ifdef GHCI
-hscThing -- like hscStmt, but deals with a single identifier
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
- -> InteractiveContext -- Context for compiling
- -> String -- The identifier
- -> IO ( PersistentCompilerState,
- [TyThing] )
-
-hscThing dflags hst hit pcs0 ic str
- = do maybe_rdr_name <- myParseIdentifier dflags str
- case maybe_rdr_name of {
- Nothing -> return (pcs0, []);
- Just rdr_name -> do
-
- -- if the identifier is a constructor (begins with an
- -- upper-case letter), then we need to consider both
- -- constructor and type class identifiers.
- let rdr_names
- | occNameSpace occ == dataName = [ rdr_name, tccls_name ]
- | otherwise = [ rdr_name ]
- where
- occ = rdrNameOcc rdr_name
- tccls_occ = setOccNameSpace occ tcClsName
- tccls_name = setRdrNameOcc rdr_name tccls_occ
-
- (pcs, unqual, maybe_rn_result) <-
- renameRdrName dflags hit hst pcs0 ic rdr_names
-
- case maybe_rn_result of {
- Nothing -> return (pcs, []);
- Just (names, decls) -> do {
-
- maybe_pcs <- typecheckExtraDecls dflags pcs hst unqual
- iNTERACTIVE decls;
-
- case maybe_pcs of {
- Nothing -> return (pcs, []);
- Just pcs ->
- let do_lookup n
- | isLocalName n = lookupNameEnv (ic_type_env ic) n
- | otherwise = lookupType hst (pcs_PTE pcs) n
-
- maybe_ty_things = map do_lookup names
- in
- return (pcs, catMaybes maybe_ty_things) }
- }}}
-
-myParseIdentifier dflags str
- = do buf <- stringToStringBuffer str
-
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parseIdentifier buf
- PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<interactive>") 1 } of
-
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
- freeStringBuffer buf;
- return Nothing }
-
- POk _ rdr_name -> do { --should, but can't: freeStringBuffer buf;
- return (Just rdr_name) }
+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
+
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags flat_expr
+
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; let tidy_expr = tidyExpr emptyTidyEnv simpl_expr
+
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
+
+ -- 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 ()
+
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
+
+ -- link it
+ ; hval <- linkExpr hsc_env bcos
+
+ ; return hval
+ }
#endif
\end{code}
+
%************************************************************************
%* *
-\subsection{Find all the things defined in a module}
+ Statistics on reading interfaces
%* *
%************************************************************************
\begin{code}
-#ifdef GHCI
-hscModuleContents
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
- -> Module -- module to inspect
- -> Bool -- grab just the exports, or the whole toplev
- -> IO (PersistentCompilerState, Maybe [TyThing])
-
-hscModuleContents dflags hst hit pcs0 mod exports_only = do {
-
- -- slurp the interface if necessary
- (pcs1, print_unqual, maybe_rn_stuff)
- <- slurpIface dflags hit hst pcs0 mod;
-
- case maybe_rn_stuff of {
- Nothing -> return (pcs0, Nothing);
- Just (names, rn_decls) -> do {
-
- -- Typecheck the declarations
- maybe_pcs <-
- typecheckExtraDecls dflags pcs1 hst print_unqual iNTERACTIVE rn_decls;
-
- case maybe_pcs of {
- Nothing -> return (pcs1, Nothing);
- Just pcs2 ->
-
- let { all_names
- | exports_only = names
- | otherwise =
- let { iface = fromJust (lookupModuleEnv hit mod);
- env = fromJust (mi_globals iface);
- range = rdrEnvElts env;
- } in
- -- grab all the things from the global env that are locally def'd
- nub [ n | elts <- range, GRE n LocalDef _ <- elts ];
-
- pte = pcs_PTE pcs2;
-
- ty_things = map (fromJust . lookupType hst pte) all_names;
-
- } in
-
- return (pcs2, Just ty_things)
- }}}}
-#endif
+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
+ 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{Initial persistent state}
+ Progress Messages: Module i of n
%* *
%************************************************************************
\begin{code}
-initPersistentCompilerState :: IO PersistentCompilerState
-initPersistentCompilerState
- = do prs <- initPersistentRenamerState
- return (
- PCS { pcs_PIT = emptyIfaceTable,
- pcs_PTE = wiredInThingEnv,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleBase,
- pcs_PRS = prs
- }
- )
-
-initPersistentRenamerState :: IO PersistentRenamerState
- = do us <- mkSplitUniqSupply 'r'
- return (
- PRS { prsOrig = NameSupply { nsUniqs = us,
- nsNames = initOrigNames,
- nsIPs = emptyFM },
- prsDecls = (emptyNameEnv, 0),
- prsInsts = (emptyBag, 0),
- prsRules = foldr add_rule (emptyBag, 0) builtinRules,
- prsImpMods = emptyFM
- }
- )
- where
- add_rule (name,rule) (rules, n_rules)
- = (gated_decl `consBag` rules, n_rules+1)
- where
- gated_decl = (gate_fn, (mod, IfaceRuleOut rdr_name rule))
- mod = nameModule name
- rdr_name = mkRdrOrig (moduleName mod) (nameOccName name)
- gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible
-
-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
+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}
+
projects / ghc-hetmet.git / blobdiff