X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FHscMain.lhs;h=f1a57b635c1b5c0d08b02b1ba7976c84fb538035;hb=3abbe090b273dcaa02b3ba7eb6232e89d0a7142f;hp=ab8730cced20daa4013643473488b71432d8a856;hpb=7bf017383327288ccfb1e83f0d9aa436fd8d81dc;p=ghc-hetmet.git diff --git a/ghc/compiler/main/HscMain.lhs b/ghc/compiler/main/HscMain.lhs index ab8730c..b8e9e50 100644 --- a/ghc/compiler/main/HscMain.lhs +++ b/ghc/compiler/main/HscMain.lhs @@ -1,405 +1,929 @@ % % (c) The GRASP/AQUA Project, Glasgow University, 1993-2000 % + \section[GHC_Main]{Main driver for Glasgow Haskell compiler} \begin{code} -module HscMain ( HscResult(..), hscMain, +module HscMain ( + HscResult(..), + hscMain, newHscEnv, hscCmmFile, + hscFileCheck, + hscParseIdentifier, #ifdef GHCI - hscStmt, + hscStmt, hscTcExpr, hscKcType, + compileExpr, #endif - initPersistentCompilerState ) where + ) where #include "HsVersions.h" #ifdef GHCI -import RdrHsSyn ( RdrNameStmt ) -import Rename ( renameStmt ) -import ByteCodeGen ( byteCodeGen ) -import Id ( Id, idName, idFlavour, modifyIdInfo ) -import IdInfo ( setFlavourInfo, makeConstantFlavour ) -import HscTypes ( InteractiveContext(..), TyThing(..) ) +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 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 HsSyn - -import StringBuffer ( hGetStringBuffer, - stringToStringBuffer, 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 Rename ( checkOldIface, renameModule, closeIfaceDecls ) -import Rules ( emptyRuleBase ) -import PrelInfo ( wiredInThingEnv, wiredInThings ) -import PrelNames ( vanillaSyntaxMap, knownKeyNames, iNTERACTIVE ) -import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails, - writeIface, pprIface ) -import Type ( Type ) -import TcModule -import InstEnv ( emptyInstEnv ) +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 +import Flattening ( flatten ) import SimplCore -import CoreUtils ( coreBindsSize ) -import CoreTidy ( tidyCorePgm ) -import CoreSat -import CoreTidy ( tidyCoreExpr ) +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, moduleName, mkHomeModule, - moduleUserString ) -import CmdLineOpts -import ErrUtils ( dumpIfSet_dyn, showPass ) -import Util ( unJust ) +import DynFlags +import ErrUtils +import Util import UniqSupply ( mkSplitUniqSupply ) -import Bag ( emptyBag ) import Outputable -import Interpreter -import CmStaticInfo ( GhciMode(..) ) import HscStats ( ppSourceStats ) -import HscTypes ( ModDetails, ModIface(..), PersistentCompilerState(..), - PersistentRenamerState(..), ModuleLocation(..), - HomeSymbolTable, - NameSupply(..), PackageRuleBase, HomeIfaceTable, - typeEnvClasses, typeEnvTyCons, emptyIfaceTable - ) -import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM ) -import OccName ( OccName ) -import Name ( Name, nameModule, nameOccName, getName, isGlobalName, - emptyNameEnv - ) -import Module ( Module, lookupModuleEnvByName ) - +import HscTypes +import MkExternalCore ( emitExternalCore ) +import ParserCore +import ParserCoreUtils +import FastString +import Maybes ( expectJust ) +import Bag ( unitBag ) import Monad ( when ) import Maybe ( isJust ) import IO +import DATA_IOREF ( newIORef, readIORef ) \end{code} %************************************************************************ %* * -\subsection{The main compiler pipeline} + Initialisation +%* * +%************************************************************************ + +\begin{code} +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} + + +%************************************************************************ +%* * + The main compiler pipeline %* * %************************************************************************ \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) + -- Compilation failed + = HscFail + + -- In IDE mode: we just do the static/dynamic checks + | HscChecked + -- parsed + (Located (HsModule RdrName)) + -- renamed + (Maybe (HsGroup Name,[LImportDecl Name],Maybe [LIE Name])) + -- typechecked + (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 PersistentCompilerState -- updated PCS - ModDetails -- new details (HomeSymbolTable additions) - ModIface -- new iface (if any compilation was done) - (Maybe String) -- generated stub_h filename (in TMPDIR) - (Maybe String) -- generated stub_c filename (in TMPDIR) - (Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any - + + -- 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) + + +-- What to do when we have compiler error or warning messages +type MessageAction = Messages -> IO () + + +-------------------------------------------------------------- +-- Exterimental code start. +-------------------------------------------------------------- + +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 InteractiveStatus + = InteractiveNoRecomp + | InteractiveRecomp Bool -- Same as HscStatus + CompiledByteCode + +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 + +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) + + +hscMkCompiler :: NoRecomp result -- What to do when recompilation isn't required. + -> FrontEnd core + -> BackEnd core prepCore + -> CodeGen prepCore result + -> Compiler result +hscMkCompiler norecomp frontend backend codegen + hsc_env mod_summary source_unchanged + have_object mbOldIface mbModIndex + = do (recomp_reqd, mbCheckedIface) + <- {-# SCC "checkOldIface" #-} + 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 + return (Just result) + _otherwise + -> do mbCore <- frontend hsc_env mod_summary mbModIndex + case mbCore of + Nothing + -> return Nothing + Just core + -> do prepCore <- backend hsc_env mod_summary + mbCheckedIface core + result <- codegen hsc_env mod_summary prepCore + return (Just result) + +-- 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) + compiler + = case ms_hsc_src mod_summary of + ExtCoreFile + -> mkComp hscCoreFrontEnd hscNewBackEnd hscCodeGenOneShot +-- 1 2 3 4 5 6 7 8 9 + HsSrcFile + -> mkComp hscFileFrontEnd hscNewBackEnd hscCodeGenOneShot + HsBootFile + -> mkComp hscFileFrontEnd hscNewBootBackEnd + (hscCodeGenConst (NewHscRecomp False)) + +-- Compile Haskell, boot and extCore in --make mode. +hscCompileMake :: Compiler (HscStatus, ModIface, ModDetails) +hscCompileMake hsc_env mod_summary + = compiler hsc_env mod_summary + where mkComp = hscMkCompiler norecompMake + compiler + = case ms_hsc_src mod_summary of + ExtCoreFile + -> mkComp hscCoreFrontEnd hscNewBackEnd hscCodeGenMake + HsSrcFile + -> mkComp hscFileFrontEnd hscNewBackEnd hscCodeGenMake + HsBootFile + -> mkComp hscFileFrontEnd hscNewBootBackEnd hscCodeGenIdentity + +-- Same as 'hscCompileMake' but don't generate any actual code. +hscCompileMakeNothing :: Compiler (HscStatus, ModIface, ModDetails) +hscCompileMakeNothing hsc_env mod_summary + = compiler hsc_env mod_summary + where mkComp = hscMkCompiler norecompMake + codeGen = hscCodeGenSimple (\(i, d, g) -> (NewHscRecomp False, i, d)) + compiler + = case ms_hsc_src mod_summary of + ExtCoreFile + -> mkComp hscCoreFrontEnd hscNewBackEnd + codeGen + HsSrcFile + -> mkComp hscFileFrontEnd hscNewBackEnd + codeGen + HsBootFile + -> mkComp hscFileFrontEnd hscNewBootBackEnd + hscCodeGenIdentity + +-- Compile Haskell, extCore to bytecode. +hscCompileInteractive :: Compiler (InteractiveStatus, ModIface, ModDetails) +hscCompileInteractive hsc_env mod_summary = + hscMkCompiler norecompInteractive frontend hscNewBackEnd hscCodeGenInteractive + hsc_env mod_summary + where 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" + dumpIfaceStats hsc_env + return a + +norecompMake :: NoRecomp (HscStatus, ModIface, ModDetails) +norecompMake = norecompWorker NewHscNoRecomp + +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) + 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) + +hscNewBackEnd :: BackEnd ModGuts (ModIface, ModDetails, CgGuts) +hscNewBackEnd hsc_env mod_summary maybe_old_iface ds_result + = do { -- OMITTED: + -- ; seqList imported_modules (return ()) + + let 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 + + -- Emit external core + ; emitExternalCore dflags cg_guts + + ------------------- + -- Return the prepared code. + ; return (new_iface, details, cg_guts) + } + +-- 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) + +-- 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) + +-- 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. + -- 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 + 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 + + ------------------- + -- 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 + +hscCodeGenIdentity :: CodeGen a a +hscCodeGenIdentity hsc_env mod_summary a = return a + +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) +#ifdef GHCI + = 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 + 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 + + ------------------- + -- 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 + + + +-------------------------------------------------------------- +-- Exterimental code end. +-------------------------------------------------------------- -- no errors or warnings; the individual passes -- (parse/rename/typecheck) print messages themselves hscMain - :: GhciMode - -> DynFlags - -> Module - -> ModuleLocation -- location info - -> Bool -- source unchanged? - -> Maybe ModIface -- old interface, if available - -> HomeSymbolTable -- for home module ModDetails - -> HomeIfaceTable - -> PersistentCompilerState -- IN: persistent compiler state + :: 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 ghci_mode dflags mod location source_unchanged maybe_old_iface hst hit pcs +hscMain hsc_env mod_summary + source_unchanged have_object maybe_old_iface + mb_mod_index = 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)) - <- checkOldIface ghci_mode dflags hit hst pcs - (unJust "hscMain" (ml_hi_file location)) - source_unchanged maybe_old_iface; - - if errs_found then - return (HscFail pcs_ch) - else 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 ghci_mode dflags mod location maybe_checked_iface - hst hit pcs_ch - }} + + ; what_next hsc_env mod_summary have_object + maybe_checked_iface + mb_mod_index + } --- we definitely expect to have the old interface available -hscNoRecomp ghci_mode dflags mod location (Just old_iface) hst hit pcs_ch - | ghci_mode == OneShot +------------------------------ +hscNoRecomp hsc_env mod_summary + have_object (Just old_iface) + mb_mod_index + | isOneShot (ghcMode (hsc_dflags hsc_env)) = do { - hPutStrLn stderr "compilation IS NOT required"; + compilationProgressMsg (hsc_dflags hsc_env) $ + "compilation IS NOT required"; + dumpIfaceStats hsc_env ; + let { bomb = panic "hscNoRecomp:OneShot" }; - return (HscNoRecomp pcs_ch bomb bomb) + return (HscNoRecomp bomb bomb) } | otherwise - = do { - when (verbosity dflags >= 1) $ - hPutStrLn stderr ("Skipping " ++ compMsg 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 (vanillaSyntaxMap, cl_hs_decls); + = 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 - case maybe_tc_result of { - Nothing -> return (HscFail pcs_cl); - Just (pcs_tc, env_tc, local_rules) -> do { + ; maybe_parsed <- myParseModule dflags hspp_file hspp_buf - -- create a new details from the closed, typechecked, old iface - let new_details = mkModDetailsFromIface env_tc local_rules - ; - return (HscNoRecomp pcs_tc new_details old_iface) - }}}} + ; case maybe_parsed of { + Left err -> do { printBagOfErrors dflags (unitBag err) + ; return Nothing } ; + Right rdr_module -> do { -compMsg mod location = - mod_str ++ take (12 - length mod_str) (repeat ' ') - ++ " (" ++ unJust "hscRecomp" (ml_hs_file location) ++ ")" - where mod_str = moduleUserString mod + ------------------- + -- 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 { -hscRecomp ghci_mode dflags mod location maybe_checked_iface hst hit pcs_ch - = do { - ; when (verbosity dflags >= 1) $ - hPutStrLn stderr ("Compiling " ++ compMsg mod location); + ------------------- + -- DESUGAR + ------------------- + ; (warns, maybe_ds_result) <- {-# SCC "DeSugar" #-} + deSugar hsc_env tc_result + ; printBagOfWarnings dflags warns + ; return maybe_ds_result + }}}}} - -- what target are we shooting for? - ; let toInterp = dopt_HscLang dflags == HscInterpreted +------------------------------ +hscFileCheck :: HscEnv -> ModSummary -> IO HscResult +hscFileCheck hsc_env mod_summary = do { ------------------- -- PARSE ------------------- - ; maybe_parsed <- myParseModule dflags - (unJust "hscRecomp:hspp" (ml_hspp_file location)) + ; 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 { - Nothing -> return (HscFail pcs_ch); - Just rdr_module -> do { - ; let this_mod = mkHomeModule (hsModuleName rdr_module) - - ------------------- - -- RENAME - ------------------- - ; (pcs_rn, print_unqualified, maybe_rn_result) - <- _scc_ "Rename" - renameModule dflags hit hst pcs_ch this_mod rdr_module - ; case maybe_rn_result of { - Nothing -> return (HscFail pcs_ch{-was: pcs_rn-}); - Just (is_exported, new_iface, rn_hs_decls) -> do { - - -- In interactive mode, we don't want to discard any top-level entities at - -- all (eg. do not inline them away during simplification), and retain them - -- all in the TypeEnv so they are available from the command line. - -- - -- isGlobalName separates the user-defined top-level names from those - -- introduced by the type checker. - ; let dont_discard | ghci_mode == Interactive = isGlobalName - | otherwise = is_exported + Left err -> do { printBagOfErrors dflags (unitBag err) + ; return HscFail } ; + Right rdr_module -> do { ------------------- - -- TYPECHECK + -- RENAME and TYPECHECK ------------------- - ; maybe_tc_result - <- _scc_ "TypeCheck" typecheckModule dflags pcs_rn hst new_iface - print_unqualified rn_hs_decls + (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 (HscFail pcs_ch{-was: pcs_rn-}); - Just (pcs_tc, tc_result) -> do { - - ; let env_tc = tc_env tc_result + Nothing -> return (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 (HscChecked rdr_module + rnInfo + (Just (tcg_binds tc_result, + tcg_rdr_env tc_result, + 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 ------------------- - -- DESUGAR + -- FLATTENING ------------------- - ; (ds_binds, ds_rules, foreign_stuff) - <- _scc_ "DeSugar" - deSugar dflags pcs_tc hst this_mod print_unqualified tc_result + ; 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, TIDY-CORE + -- SIMPLIFY ------------------- - -- We grab the the unfoldings at this point. - ; (pcs_simpl, tidy_binds, orphan_rules) - <- simplThenTidy dflags pcs_tc hst this_mod dont_discard ds_binds ds_rules - + ; simpl_result <- {-# SCC "Core2Core" #-} + core2core hsc_env flat_result + ------------------- - -- BUILD THE NEW ModDetails AND ModIface + -- TIDY ------------------- - ; let new_details = mkModDetails env_tc tidy_binds orphan_rules - ; final_iface <- _scc_ "MkFinalIface" - mkFinalIface ghci_mode dflags location - maybe_checked_iface new_iface new_details + ; (cg_guts, details) <- {-# SCC "CoreTidy" #-} + tidyProgram hsc_env simpl_result + + -- Alive at this point: + -- tidy_result, pcs_final + -- hsc_env ------------------- - -- CONVERT TO STG and COMPLETE CODE GENERATION + -- 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 + ------------------- - -- Do saturation and convert to A-normal form - ; saturated <- coreSatPgm dflags tidy_binds + -- CONVERT TO STG and COMPLETE CODE GENERATION + ; (stub_h_exists, stub_c_exists, maybe_bcos) + <- hscCodeGen dflags (ms_location mod_summary) cg_guts - ; (maybe_stub_h_filename, maybe_stub_c_filename, maybe_bcos) - <- restOfCodeGeneration dflags toInterp this_mod - (map ideclName (hsModuleImports rdr_module)) - foreign_stuff env_tc saturated - hit (pcs_PIT pcs_simpl) + -- And the answer is ... + ; dumpIfaceStats hsc_env - -- and the answer is ... - ; return (HscRecomp pcs_simpl new_details final_iface - maybe_stub_h_filename maybe_stub_c_filename + ; 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 -mkFinalIface ghci_mode dflags location maybe_old_iface new_iface new_details - = case completeIface maybe_old_iface new_iface new_details of - (new_iface, Nothing) -- no change in the interfacfe - -> do when (dopt Opt_D_dump_hi_diffs dflags) - (printDump (text "INTERFACE UNCHANGED")) - dumpIfSet_dyn dflags Opt_D_dump_hi - "UNCHANGED FINAL INTERFACE" (pprIface new_iface) - return new_iface - (new_iface, Just sdoc_diffs) - -> do dumpIfSet_dyn dflags Opt_D_dump_hi_diffs "INTERFACE HAS CHANGED" - sdoc_diffs - dumpIfSet_dyn dflags Opt_D_dump_hi "NEW FINAL INTERFACE" - (pprIface new_iface) - -- Write the interface file - when (ghci_mode /= Interactive) - (writeIface (unJust "hscRecomp:hi" (ml_hi_file location)) - new_iface) - return new_iface + ------------------ 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) + } -myParseModule dflags src_filename - = do -------------------------- Parser ---------------- - showPass dflags "Parser" - _scc_ "Parser" do - buf <- hGetStringBuffer True{-expand tabs-} src_filename +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" } - 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 { +myParseModule dflags src_filename maybe_src_buf + = -------------------------- Parser ---------------- + showPass dflags "Parser" >> + {-# SCC "Parser" #-} do - PFailed err -> do { hPutStrLn stderr (showSDoc err); - freeStringBuffer buf; - return Nothing }; + -- 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 - POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do { + let loc = mkSrcLoc (mkFastString src_filename) 1 0 + + case unP parseModule (mkPState buf loc dflags) of { + + PFailed span err -> return (Left (mkPlainErrMsg span err)); + + 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. }} -simplThenTidy dflags pcs hst this_mod dont_discard binds rules - = do -- Do main Core-language transformations --------- - -- _scc_ "Core2Core" - (simplified, orphan_rules) - <- core2core dflags pcs hst dont_discard binds rules - - -- Do the final tidy-up - (pcs', tidy_binds, tidy_orphan_rules) - <- tidyCorePgm dflags this_mod pcs simplified orphan_rules - - return (pcs', tidy_binds, tidy_orphan_rules) - - -restOfCodeGeneration dflags toInterp this_mod imported_module_names - foreign_stuff env_tc tidy_binds - hit pit -- these last two for mapping ModNames to Modules - | toInterp - = do (bcos,itbl_env) - <- byteCodeGen dflags tidy_binds local_tycons local_classes - return (Nothing, Nothing, Just (bcos,itbl_env)) - - | otherwise - = do - -------------------------- Convert to STG ------------------------------- - (stg_binds, cost_centre_info) - <- _scc_ "CoreToStg" - myCoreToStg dflags this_mod tidy_binds env_tc - - -------------------------- Code generation ------------------------------ - abstractC <- _scc_ "CodeGen" - codeGen dflags this_mod imported_modules - cost_centre_info fe_binders - local_tycons stg_binds - - -------------------------- Code output ------------------------------- - (maybe_stub_h_name, maybe_stub_c_name) - <- codeOutput dflags this_mod local_tycons - tidy_binds stg_binds - c_code h_code abstractC - - return (maybe_stub_h_name, maybe_stub_c_name, Nothing) - where - local_tycons = typeEnvTyCons env_tc - local_classes = typeEnvClasses env_tc - imported_modules = map mod_name_to_Module imported_module_names - (h_code,c_code,fe_binders) = foreign_stuff - - mod_name_to_Module :: ModuleName -> Module - mod_name_to_Module nm - = let str_mi = case lookupModuleEnvByName hit nm of - Just mi -> mi - Nothing -> case lookupModuleEnvByName pit nm of - Just mi -> mi - Nothing -> barf nm - in mi_module str_mi - barf nm = pprPanic "mod_name_to_Module: no hst or pst mapping for" - (ppr nm) - - -myCoreToStg dflags this_mod tidy_binds env_tc +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 + stg_binds <- {-# SCC "Core2Stg" #-} + coreToStg home_mods prepd_binds - --let bcos = byteCodeGen dflags tidy_binds local_tycons local_classes - - - stg_binds <- _scc_ "Core2Stg" coreToStg dflags this_mod tidy_binds - - (stg_binds2, cost_centre_info) - <- _scc_ "Core2Stg" stg2stg dflags this_mod stg_binds + (stg_binds2, cost_centre_info) <- {-# SCC "Stg2Stg" #-} + stg2stg dflags home_mods this_mod stg_binds return (stg_binds2, cost_centre_info) - where - local_tycons = typeEnvTyCons env_tc - local_classes = typeEnvClasses env_tc \end{code} @@ -409,22 +933,6 @@ myCoreToStg dflags this_mod tidy_binds env_tc %* * %************************************************************************ -\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 @@ -452,160 +960,192 @@ A naked expression returns a singleton Name [it]. result not showable) ==> error \begin{code} -hscStmt dflags hst hit pcs0 icontext stmt just_expr - = let - InteractiveContext { - ic_rn_env = rn_env, - ic_type_env = type_env, - ic_module = scope_mod } = icontext - in - 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 scope_mod - iNTERACTIVE rn_env 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 { (syn, ExprStmt e _, decls) -> - typecheckExpr dflags pcs1 hst type_env - print_unqual iNTERACTIVE (syn,e,decls) } - else typecheckStmt dflags pcs1 hst type_env - 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 - - -- Tidy it (temporary, until coreSat does cloning) - ; tidy_expr <- tidyCoreExpr simpl_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)) - -- Saturate it - ; sat_expr <- coreSatExpr dflags tidy_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 - -- Convert to BCOs - ; bcos <- coreExprToBCOs dflags sat_expr + -- Rename and typecheck it + let icontext = hsc_IC hsc_env + ; maybe_tc_result <- tcRnStmt hsc_env icontext parsed_stmt - ; let - -- make all the bound ids "constant" 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. - constant_bound_ids = map constantizeId bound_ids; + ; 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} - constantizeId id - = modifyIdInfo (`setFlavourInfo` makeConstantFlavour - (idFlavour id)) id +\begin{code} +#ifdef GHCI +hscParseStmt :: DynFlags -> String -> IO (Maybe (Maybe (LStmt RdrName))) +hscParseStmt = hscParseThing parseStmt - ; return (pcs2, Just (constant_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# + let loc = mkSrcLoc FSLIT("") 1 0 - case parseStmt buf PState{ bol = 0#, atbol = 1#, - context = [], glasgow_exts = glaexts, - loc = mkSrcLoc SLIT("") 0 } of { + case unP parser (mkPState buf loc dflags) of { - PFailed err -> do { hPutStrLn stderr (showSDoc err); --- Not yet implemented in <4.11 freeStringBuffer buf; - return Nothing }; + PFailed span err -> do { printError span err; + return Nothing }; - -- no stmt: the line consisted of just space or comments - POk _ Nothing -> 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) }} +\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 + + -- 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} + +%************************************************************************ +%* * + Statistics on reading interfaces +%* * +%************************************************************************ + +\begin{code} +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 = (emptyBag, 0), - prsImpMods = emptyFM - } - ) - -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 :: PackageRuleBase -initRules = emptyRuleBase -{- SHOULD BE (ish) - foldl add emptyVarEnv builtinRules - where - add env (name,rule) - = extendRuleBase env name rule --} +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} +