\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain (
- HscResult(..),
- hscMain, newHscEnv, hscCmmFile,
- hscFileCheck,
- hscParseIdentifier,
+module HscMain
+ ( newHscEnv, hscCmmFile
+ , hscFileCheck
+ , hscParseIdentifier
#ifdef GHCI
- hscStmt, hscTcExpr, hscKcType,
- compileExpr,
+ , hscStmt, hscTcExpr, hscKcType
+ , compileExpr
#endif
- ) 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"
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 LoadIface ( ifaceStats, initExternalPackageState )
import PrelInfo ( wiredInThings, basicKnownKeyNames )
import MkIface ( checkOldIface, mkIface, writeIfaceFile )
-import Desugar
+import Desugar ( deSugar )
import Flattening ( flatten )
-import SimplCore
+import SimplCore ( core2core )
import TidyPgm ( tidyProgram, mkBootModDetails )
import CorePrep ( corePrepPgm )
import CoreToStg ( coreToStg )
import DynFlags
import ErrUtils
-import Util
import UniqSupply ( mkSplitUniqSupply )
import Outputable
import FastString
import Maybes ( expectJust )
import Bag ( unitBag )
-import Monad ( when )
-import Maybe ( isJust )
+import Monad ( unless )
import IO
import DATA_IOREF ( newIORef, readIORef )
\end{code}
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', 'make', or 'interactive'
-mode. 'One-shot' mode targets hard-code, 'make' mode targets hard-code
-and nothing, and 'interactive' mode targets byte-code. The modes are
-kept separate because of their different types.
+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. 'Make' mode is like 'one-shot' except that we
-keep the resulting ModIface and ModDetails. 'Make' mode doesn't target
-byte-code since that require us to return the newly compiled byte-code.
-'Interactive' mode is similar to 'make' mode except that we return
-the compiled byte-code together with the ModIface and ModDetails.
+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.
\begin{code}
-data HscResult
- -- Compilation failed
- = HscFail
- -- In IDE mode: we just do the static/dynamic checks
- | HscChecked
+data HscChecked
+ = HscChecked
-- parsed
- (Located (HsModule RdrName))
+ (Located (HsModule RdrName))
-- renamed
- (Maybe (HsGroup Name,[LImportDecl Name],Maybe [LIE Name]))
+ (Maybe (HsGroup Name,[LImportDecl Name],Maybe [LIE Name]))
-- typechecked
- (Maybe (LHsBinds Id, GlobalRdrEnv, ModDetails))
+ (Maybe (LHsBinds Id, GlobalRdrEnv, ModDetails))
- -- Concluded that it wasn't necessary
- | HscNoRecomp ModDetails -- new details (HomeSymbolTable additions)
- ModIface -- new iface (if any compilation was done)
- -- Did recompilation
- | HscRecomp ModDetails -- new details (HomeSymbolTable additions)
- ModIface -- new iface (if any compilation was done)
- Bool -- stub_h exists
- Bool -- stub_c exists
- (Maybe CompiledByteCode)
+-- 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
--- What to do when we have compiler error or warning messages
-type MessageAction = Messages -> IO ()
+-- 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
---------------------------------------------------------------
--- Exterimental code start.
---------------------------------------------------------------
+evalComp :: Comp a -> CompState -> IO a
+evalComp comp st = do (val,_st') <- runComp comp st
+ return val
-data HscStatus
- = NewHscNoRecomp
- | NewHscRecomp 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.
+data CompState
+ = CompState
+ { compHscEnv :: HscEnv
+ , compModSummary :: ModSummary
+ , compOldIface :: Maybe ModIface
+ }
-data InteractiveStatus
- = InteractiveNoRecomp
- | InteractiveRecomp Bool -- Same as HscStatus
- CompiledByteCode
+get :: Comp CompState
+get = Comp $ \s -> return (s,s)
+
+gets :: (CompState -> a) -> Comp a
+gets getter = do st <- get
+ return (getter st)
-type NoRecomp result = HscEnv -> ModSummary -> Bool -> ModIface -> Maybe (Int,Int) -> IO result
-type FrontEnd core = HscEnv -> ModSummary -> Maybe (Int,Int) -> IO (Maybe core)
-type BackEnd core prepCore = HscEnv -> ModSummary -> Maybe ModIface -> core -> IO prepCore
-type CodeGen prepCore result = HscEnv -> ModSummary -> prepCore -> IO result
+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
- -> Bool -- True <=> have an object file (for msgs only)
-> 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
- -> BackEnd core prepCore
- -> CodeGen prepCore result
+ -> (core -> Comp result) -- Backend.
-> Compiler result
-hscMkCompiler norecomp frontend backend codegen
+hscMkCompiler norecomp messenger frontend backend
hsc_env mod_summary source_unchanged
- have_object mbOldIface mbModIndex
- = do (recomp_reqd, mbCheckedIface)
+ mbOldIface mbModIndex
+ = flip evalComp (CompState hsc_env mod_summary mbOldIface) $
+ do (recomp_reqd, mbCheckedIface)
<- {-# SCC "checkOldIface" #-}
- checkOldIface hsc_env mod_summary
+ liftIO $ checkOldIface hsc_env mod_summary
source_unchanged mbOldIface
case mbCheckedIface of
Just iface | not recomp_reqd
- -> do result <- norecomp hsc_env mod_summary have_object iface mbModIndex
+ -> do messenger mbModIndex False
+ result <- norecomp iface
return (Just result)
_otherwise
- -> do mbCore <- frontend hsc_env mod_summary mbModIndex
+ -> do messenger mbModIndex True
+ mbCore <- frontend
case mbCore of
Nothing
-> return Nothing
Just core
- -> do prepCore <- backend hsc_env mod_summary
- mbCheckedIface core
- result <- codegen hsc_env mod_summary prepCore
+ -> 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 NewHscNoRecomp)
+ 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 hscNewBackEnd hscCodeGenOneShot
--- 1 2 3 4 5 6 7 8 9
+ -> mkComp hscCoreFrontEnd nonBootComp
HsSrcFile
- -> mkComp hscFileFrontEnd hscNewBackEnd hscCodeGenOneShot
+ -> mkComp hscFileFrontEnd nonBootComp
HsBootFile
- -> mkComp hscFileFrontEnd hscNewBootBackEnd
- (hscCodeGenConst (NewHscRecomp False))
+ -> mkComp hscFileFrontEnd bootComp
--- Compile Haskell, boot and extCore in --make mode.
-hscCompileMake :: Compiler (HscStatus, ModIface, ModDetails)
-hscCompileMake hsc_env mod_summary
+-- 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 norecompMake
- backend = case hscTarget (hsc_dflags hsc_env) of
- HscNothing -> hscCodeGenSimple (\(i, d, g) -> (NewHscRecomp False, i, d))
- _other -> hscCodeGenMake
+ where mkComp = hscMkCompiler norecompBatch batchMsg
+ nonBootComp inp = hscSimplify inp >>= hscNormalIface >>=
+ hscWriteIface >>= hscBatch
+ bootComp inp = hscSimpleIface inp >>= hscWriteIface >>= hscNothing
compiler
= case ms_hsc_src mod_summary of
ExtCoreFile
- -> mkComp hscCoreFrontEnd hscNewBackEnd backend
+ -> mkComp hscCoreFrontEnd nonBootComp
HsSrcFile
- -> mkComp hscFileFrontEnd hscNewBackEnd backend
+ -> mkComp hscFileFrontEnd nonBootComp
HsBootFile
- -> mkComp hscFileFrontEnd hscNewBootBackEnd hscCodeGenIdentity
+ -> 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
+ 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 frontend hscNewBackEnd hscCodeGenInteractive
+ hscMkCompiler norecompInteractive batchMsg
+ frontend backend
hsc_env mod_summary
- where frontend = case ms_hsc_src mod_summary of
+ 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 'hscCompileMake' instead."
-
-norecompOneShot :: a -> NoRecomp a
-norecompOneShot a hsc_env mod_summary
- have_object old_iface
- mb_mod_index
- = do compilationProgressMsg (hsc_dflags hsc_env) $
- "compilation IS NOT required"
+ "Use 'hscCompileBatch' instead."
+
+--------------------------------------------------------------
+-- NoRecomp handlers
+--------------------------------------------------------------
+
+norecompOneShot :: NoRecomp HscStatus
+norecompOneShot old_iface
+ = do hsc_env <- gets compHscEnv
+ liftIO $ do
dumpIfaceStats hsc_env
- return a
+ return HscNoRecomp
-norecompMake :: NoRecomp (HscStatus, ModIface, ModDetails)
-norecompMake = norecompWorker NewHscNoRecomp
+norecompBatch :: NoRecomp (HscStatus, ModIface, ModDetails)
+norecompBatch = norecompWorker HscNoRecomp False
norecompInteractive :: NoRecomp (InteractiveStatus, ModIface, ModDetails)
-norecompInteractive = norecompWorker InteractiveNoRecomp
-
-norecompWorker :: a -> NoRecomp (a, ModIface, ModDetails)
-norecompWorker a hsc_env mod_summary have_object
- old_iface mb_mod_index
- = do compilationProgressMsg (hsc_dflags hsc_env) $
- (showModuleIndex mb_mod_index ++
- "Skipping " ++ showModMsg have_object mod_summary)
+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)
-hscNewBootBackEnd :: BackEnd ModGuts (HscStatus, ModIface, ModDetails)
-hscNewBootBackEnd hsc_env mod_summary maybe_old_iface ds_result
- = do details <- mkBootModDetails hsc_env ds_result
- (new_iface, no_change)
- <- {-# SCC "MkFinalIface" #-}
- mkIface hsc_env maybe_old_iface ds_result details
- writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
- -- And the answer is ...
- dumpIfaceStats hsc_env
- return (NewHscRecomp False, new_iface, details)
+--------------------------------------------------------------
+-- Progress displayers.
+--------------------------------------------------------------
-hscNewBackEnd :: BackEnd ModGuts (ModIface, ModDetails, CgGuts)
-hscNewBackEnd hsc_env mod_summary maybe_old_iface ds_result
- = do { -- OMITTED:
- -- ; seqList imported_modules (return ())
+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 :: Maybe (Int,Int) -> Bool -> Comp ()
+batchMsg 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 (hscTarget (hsc_dflags hsc_env)) recomp mod_summary)
+ liftIO $ do
+ if recomp
+ then showMsg "Compiling "
+ else showMsg "Skipping "
- let dflags = hsc_dflags hsc_env
- -------------------
- -- FLATTENING
- -------------------
- ; flat_result <- {-# SCC "Flattening" #-}
- flatten hsc_env ds_result
+--------------------------------------------------------------
+-- FrontEnds
+--------------------------------------------------------------
-{- TEMP: need to review space-leak fixing here
- NB: even the code generator can force one of the
- thunks for constructor arguments, for newtypes in particular
+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!
- ; let -- Rule-base accumulated from imported packages
- pkg_rule_base = eps_rule_base (hsc_EPS hsc_env)
+
+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
- -- In one-shot mode, ZAP the external package state at
- -- this point, because we aren't going to need it from
- -- now on. We keep the name cache, however, because
- -- tidyCore needs it.
- pcs_middle
- | one_shot = pcs_tc{ pcs_EPS = error "pcs_EPS missing" }
- | otherwise = pcs_tc
+--------------------------------------------------------------
+-- Simplifiers
+--------------------------------------------------------------
- ; pkg_rule_base `seq` pcs_middle `seq` return ()
--}
+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
- -- alive at this point:
- -- pcs_middle
- -- flat_result
- -- pkg_rule_base
+--------------------------------------------------------------
+-- Interface generators
+--------------------------------------------------------------
- -------------------
- -- SIMPLIFY
- -------------------
- ; simpl_result <- {-# SCC "Core2Core" #-}
- core2core hsc_env flat_result
+-- 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
-
- -- Alive at this point:
- -- tidy_result, pcs_final
- -- hsc_env
+ (cg_guts, details) <- {-# SCC "CoreTidy" #-}
+ tidyProgram hsc_env simpl_result
-------------------
-- BUILD THE NEW ModIface and ModDetails
-- 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)
+ (new_iface, no_change)
<- {-# SCC "MkFinalIface" #-}
mkIface hsc_env maybe_old_iface simpl_result details
-
- ; writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
-
-- Emit external core
- ; emitExternalCore dflags cg_guts
+ emitExternalCore (hsc_dflags hsc_env) cg_guts -- Move this? --Lemmih 03/07/2006
+ dumpIfaceStats hsc_env
-------------------
-- Return the prepared code.
- ; return (new_iface, details, cg_guts)
- }
+ 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.
-hscCodeGenNothing :: CodeGen (ModIface, ModDetails, CgGuts) (HscStatus, ModIface, ModDetails)
-hscCodeGenNothing hsc_env mod_summary (iface, details, cgguts)
- = return (NewHscRecomp False, iface, details)
+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.
-hscCodeGenMake :: CodeGen (ModIface, ModDetails, CgGuts) (HscStatus, ModIface, ModDetails)
-hscCodeGenMake hsc_env mod_summary (iface, details, cgguts)
- = do hasStub <- hscCodeGenCompile hsc_env mod_summary cgguts
- return (NewHscRecomp hasStub, iface, details)
+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.
-hscCodeGenOneShot :: CodeGen (ModIface, ModDetails, CgGuts) HscStatus
-hscCodeGenOneShot hsc_env mod_summary (_, _, cgguts)
- = do hasStub <- hscCodeGenCompile hsc_env mod_summary cgguts
- return (NewHscRecomp hasStub)
-
-hscCodeGenCompile :: CodeGen CgGuts Bool
-hscCodeGenCompile hsc_env mod_summary cgguts
- = do let CgGuts{ -- This is the last use of the ModGuts in a compilation.
+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_dep_pkgs = dependencies } = cgguts
dflags = hsc_dflags hsc_env
location = ms_location mod_summary
- modName = ms_mod 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
dependencies abstractC
return stub_c_exists
-hscCodeGenIdentity :: CodeGen a a
-hscCodeGenIdentity hsc_env mod_summary a = return a
+hscConst :: b -> a -> Comp b
+hscConst b a = return b
-hscCodeGenSimple :: (a -> b) -> CodeGen a b
-hscCodeGenSimple fn hsc_env mod_summary a = return (fn a)
-
-hscCodeGenConst :: b -> CodeGen a b
-hscCodeGenConst b hsc_env mod_summary a = return b
-
-hscCodeGenInteractive :: CodeGen (ModIface, ModDetails, CgGuts)
- (InteractiveStatus, ModIface, ModDetails)
-hscCodeGenInteractive hsc_env mod_summary (iface, details, cgguts)
+hscInteractive :: (ModIface, ModDetails, CgGuts)
+ -> Comp (InteractiveStatus, ModIface, ModDetails)
+hscInteractive (iface, details, cgguts)
#ifdef GHCI
- = do let CgGuts{ -- This is the last use of the ModGuts in a compilation.
+ = 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,
- cg_home_mods = home_mods,
- cg_dep_pkgs = dependencies } = cgguts
+ cg_foreign = foreign_stubs } = cgguts
dflags = hsc_dflags hsc_env
location = ms_location mod_summary
- modName = ms_mod 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
= panic "GHC not compiled with interpreter"
#endif
-
-
---------------------------------------------------------------
--- Exterimental code end.
---------------------------------------------------------------
-
- -- no errors or warnings; the individual passes
- -- (parse/rename/typecheck) print messages themselves
-
-hscMain
- :: HscEnv
- -> ModSummary
- -> Bool -- True <=> source unchanged
- -> Bool -- True <=> have an object file (for msgs only)
- -> Maybe ModIface -- Old interface, if available
- -> Maybe (Int, Int) -- Just (i,n) <=> module i of n (for msgs)
- -> IO HscResult
-
-hscMain hsc_env mod_summary
- source_unchanged have_object maybe_old_iface
- mb_mod_index
- = do {
- (recomp_reqd, maybe_checked_iface) <-
- {-# SCC "checkOldIface" #-}
- checkOldIface hsc_env mod_summary
- source_unchanged maybe_old_iface;
-
- let no_old_iface = not (isJust maybe_checked_iface)
- what_next | recomp_reqd || no_old_iface = hscRecomp
- | otherwise = hscNoRecomp
-
- ; what_next hsc_env mod_summary have_object
- maybe_checked_iface
- mb_mod_index
- }
-
-
-------------------------------
-hscNoRecomp hsc_env mod_summary
- have_object (Just old_iface)
- mb_mod_index
- | isOneShot (ghcMode (hsc_dflags hsc_env))
- = do {
- compilationProgressMsg (hsc_dflags hsc_env) $
- "compilation IS NOT required";
- dumpIfaceStats hsc_env ;
-
- let { bomb = panic "hscNoRecomp:OneShot" };
- return (HscNoRecomp bomb bomb)
- }
- | otherwise
- = do { compilationProgressMsg (hsc_dflags hsc_env) $
- (showModuleIndex mb_mod_index ++
- "Skipping " ++ showModMsg have_object mod_summary)
-
- ; new_details <- {-# SCC "tcRnIface" #-}
- initIfaceCheck hsc_env $
- typecheckIface old_iface ;
- ; dumpIfaceStats hsc_env
-
- ; return (HscNoRecomp new_details old_iface)
- }
-
-hscNoRecomp hsc_env mod_summary
- have_object Nothing
- mb_mod_index
- = panic "hscNoRecomp" -- hscNoRecomp definitely expects to
- -- have the old interface available
-
------------------------------
-hscRecomp hsc_env mod_summary
- have_object maybe_old_iface
- mb_mod_index
- = case ms_hsc_src mod_summary of
- HsSrcFile -> do
- front_res <- hscFileFrontEnd hsc_env mod_summary mb_mod_index
- case ghcMode (hsc_dflags hsc_env) of
- JustTypecheck -> hscBootBackEnd hsc_env mod_summary maybe_old_iface front_res
- _ -> hscBackEnd hsc_env mod_summary maybe_old_iface front_res
-
- HsBootFile -> do
- front_res <- hscFileFrontEnd hsc_env mod_summary mb_mod_index
- hscBootBackEnd hsc_env mod_summary maybe_old_iface front_res
-
- ExtCoreFile -> do
- front_res <- hscCoreFrontEnd hsc_env mod_summary mb_mod_index
- hscBackEnd hsc_env mod_summary maybe_old_iface front_res
-
-hscCoreFrontEnd hsc_env mod_summary mb_mod_index = do {
- -------------------
- -- PARSE
- -------------------
- ; inp <- readFile (expectJust "hscCoreFrontEnd" (ms_hspp_file mod_summary))
- ; case parseCore inp 1 of
- FailP s -> errorMsg (hsc_dflags hsc_env) (text s{-ToDo: wrong-}) >> return Nothing
- OkP rdr_module -> do {
-
- -------------------
- -- RENAME and TYPECHECK
- -------------------
- ; (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 hsc_env mod_summary mb_mod_index = do {
- -------------------
- -- DISPLAY PROGRESS MESSAGE
- -------------------
- ; let dflags = hsc_dflags hsc_env
- one_shot = isOneShot (ghcMode dflags)
- toInterp = hscTarget dflags == HscInterpreted
- ; when (not one_shot) $
- compilationProgressMsg dflags $
- (showModuleIndex mb_mod_index ++
- "Compiling " ++ showModMsg (not toInterp) mod_summary)
-
- -------------------
- -- PARSE
- -------------------
- ; let 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 -> do {
-
- -------------------
- -- RENAME and TYPECHECK
- -------------------
- (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 -> do {
-
- -------------------
- -- DESUGAR
- -------------------
- ; (warns, maybe_ds_result) <- {-# SCC "DeSugar" #-}
- deSugar hsc_env tc_result
- ; printBagOfWarnings dflags warns
- ; return maybe_ds_result
- }}}}}
-
-------------------------------
-
-hscFileCheck :: HscEnv -> ModSummary -> IO HscResult
+hscFileCheck :: HscEnv -> ModSummary -> IO (Maybe HscChecked)
hscFileCheck hsc_env mod_summary = do {
-------------------
-- PARSE
-------------------
; let dflags = hsc_dflags hsc_env
- hspp_file = expectJust "hscFileFrontEnd" (ms_hspp_file mod_summary)
+ 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 HscFail } ;
+ ; return Nothing } ;
Right rdr_module -> do {
-------------------
; printErrorsAndWarnings dflags tc_msgs
; case maybe_tc_result of {
- Nothing -> return (HscChecked rdr_module Nothing Nothing);
+ Nothing -> return (Just (HscChecked rdr_module Nothing Nothing));
Just tc_result -> do
let md = ModDetails {
md_types = tcg_type_env tc_result,
imports <- tcg_rn_imports tc_result
let exports = tcg_rn_exports tc_result
return (decl,imports,exports)
- return (HscChecked rdr_module
+ return (Just (HscChecked rdr_module
rnInfo
(Just (tcg_binds tc_result,
tcg_rdr_env tc_result,
- md)))
+ md))))
}}}}
-------------------------------
-hscBootBackEnd :: HscEnv -> ModSummary -> Maybe ModIface -> Maybe ModGuts -> IO HscResult
--- For hs-boot files, there's no code generation to do
-
-hscBootBackEnd hsc_env mod_summary maybe_old_iface Nothing
- = return HscFail
-hscBootBackEnd hsc_env mod_summary maybe_old_iface (Just ds_result)
- = do { details <- mkBootModDetails hsc_env ds_result
-
- ; (new_iface, no_change)
- <- {-# SCC "MkFinalIface" #-}
- mkIface hsc_env maybe_old_iface ds_result details
-
- ; writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
-
- -- And the answer is ...
- ; dumpIfaceStats hsc_env
-
- ; return (HscRecomp details new_iface
- False False Nothing)
- }
-
-------------------------------
-hscBackEnd :: HscEnv -> ModSummary -> Maybe ModIface -> Maybe ModGuts -> IO HscResult
-
-hscBackEnd hsc_env mod_summary maybe_old_iface Nothing
- = return HscFail
-
-hscBackEnd hsc_env mod_summary maybe_old_iface (Just ds_result)
- = do { -- OMITTED:
- -- ; seqList imported_modules (return ())
-
- let one_shot = isOneShot (ghcMode dflags)
- dflags = hsc_dflags hsc_env
-
- -------------------
- -- FLATTENING
- -------------------
- ; flat_result <- {-# SCC "Flattening" #-}
- flatten hsc_env ds_result
-
-
-{- TEMP: need to review space-leak fixing here
- NB: even the code generator can force one of the
- thunks for constructor arguments, for newtypes in particular
-
- ; let -- Rule-base accumulated from imported packages
- pkg_rule_base = eps_rule_base (hsc_EPS hsc_env)
-
- -- In one-shot mode, ZAP the external package state at
- -- this point, because we aren't going to need it from
- -- now on. We keep the name cache, however, because
- -- tidyCore needs it.
- pcs_middle
- | one_shot = pcs_tc{ pcs_EPS = error "pcs_EPS missing" }
- | otherwise = pcs_tc
-
- ; pkg_rule_base `seq` pcs_middle `seq` return ()
--}
-
- -- alive at this point:
- -- pcs_middle
- -- flat_result
- -- pkg_rule_base
-
- -------------------
- -- SIMPLIFY
- -------------------
- ; simpl_result <- {-# SCC "Core2Core" #-}
- core2core hsc_env flat_result
-
- -------------------
- -- TIDY
- -------------------
- ; (cg_guts, details) <- {-# SCC "CoreTidy" #-}
- tidyProgram hsc_env simpl_result
-
- -- Alive at this point:
- -- tidy_result, pcs_final
- -- hsc_env
-
- -------------------
- -- 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
-
- ; writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
-
- -- Space leak reduction: throw away the new interface if
- -- we're in one-shot mode; we won't be needing it any
- -- more.
- ; final_iface <- if one_shot then return (error "no final iface")
- else return new_iface
-
- -- Build the final ModDetails (except in one-shot mode, where
- -- we won't need this information after compilation).
- ; final_details <- if one_shot then return (error "no final details")
- else return $! details
-
- -- Emit external core
- ; emitExternalCore dflags cg_guts
-
- -------------------
- -- CONVERT TO STG and COMPLETE CODE GENERATION
- ; (stub_h_exists, stub_c_exists, maybe_bcos)
- <- hscCodeGen dflags (ms_location mod_summary) cg_guts
-
- -- And the answer is ...
- ; dumpIfaceStats hsc_env
-
- ; return (HscRecomp final_details
- final_iface
- stub_h_exists stub_c_exists
- maybe_bcos)
- }
-
-
-
-hscCodeGen dflags location
- 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 } = do {
-
- let { 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 ;
-
- case hscTarget dflags of
- HscNothing -> return (False, False, Nothing)
-
- HscInterpreted ->
-#ifdef GHCI
- do ----------------- 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 ( istub_h_exists, istub_c_exists, Just comp_bc )
-#else
- panic "GHC not compiled with interpreter"
-#endif
-
- other ->
- do
- ----------------- 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_h_exists, stub_c_exists, Nothing)
- }
-
hscCmmFile :: DynFlags -> FilePath -> IO Bool
hscCmmFile dflags filename = do
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