X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FHscMain.lhs;h=395ab867f544164e957e4140e9daa0fc0d12d3a8;hb=29da2cf3011c292bc4261601aff85afb13e24d54;hp=ac90f41cbdba993f2936ad8650a3c8855ef83241;hpb=e66018084e22615311828b7a221d5df25cdf09ea;p=ghc-hetmet.git diff --git a/ghc/compiler/main/HscMain.lhs b/ghc/compiler/main/HscMain.lhs index ac90f41..395ab86 100644 --- a/ghc/compiler/main/HscMain.lhs +++ b/ghc/compiler/main/HscMain.lhs @@ -5,458 +5,483 @@ \section[GHC_Main]{Main driver for Glasgow Haskell compiler} \begin{code} -module HscMain ( HscResult(..), hscMain, +module HscMain ( + HscResult(..), hscMain, newHscEnv, hscBufferFrontEnd #ifdef GHCI - hscStmt, hscThing, hscModuleContents, + , hscStmt, hscTcExpr, hscThing, + , compileExpr #endif - initPersistentCompilerState ) where + ) where #include "HsVersions.h" #ifdef GHCI -import Interpreter -import ByteCodeGen ( byteCodeGen ) -import CoreTidy ( tidyCoreExpr ) +import HsSyn ( Stmt(..), LStmt, LHsExpr ) +import IfaceSyn ( IfaceDecl ) +import CodeOutput ( outputForeignStubs ) +import ByteCodeGen ( byteCodeGen, coreExprToBCOs ) +import Linker ( HValue, linkExpr ) +import TidyPgm ( tidyCoreExpr ) 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 TcRnDriver ( tcRnStmt, tcRnExpr, tcRnThing ) +import RdrName ( RdrName, GlobalRdrEnv ) import Type ( Type ) -import Id ( Id, idName, setGlobalIdDetails ) -import IdInfo ( GlobalIdDetails(VanillaGlobal) ) -import Name ( isLocalName ) -import NameEnv ( lookupNameEnv ) -import RdrName ( rdrEnvElts ) import PrelNames ( iNTERACTIVE ) import StringBuffer ( stringToStringBuffer ) -import FastString ( mkFastString ) -import Maybes ( catMaybes ) - -import List ( nub ) +import SrcLoc ( noSrcLoc, Located(..) ) +import Var ( Id ) +import Name ( Name ) +import CoreLint ( lintUnfolding ) +import DsMeta ( templateHaskellNames ) +import BasicTypes ( Fixity ) #endif -import HsSyn - -import RdrName ( mkRdrOrig ) -import Id ( idName ) -import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) ) -import StringBuffer ( hGetStringBuffer, freeStringBuffer ) +import StringBuffer ( hGetStringBuffer ) 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 TcRnDriver ( tcRnModule, tcRnExtCore ) +import TcIface ( typecheckIface ) +import IfaceEnv ( initNameCache ) +import LoadIface ( ifaceStats, initExternalPackageState ) +import PrelInfo ( wiredInThings, basicKnownKeyNames ) +import RdrName ( GlobalRdrEnv ) +import MkIface ( checkOldIface, mkIface ) import Desugar +import Flattening ( flatten ) import SimplCore -import CoreUtils ( coreBindsSize ) -import CoreTidy ( tidyCorePgm ) +import TidyPgm ( tidyCorePgm ) import CorePrep ( corePrepPgm ) -import StgSyn import CoreToStg ( coreToStg ) +import Name ( Name, NamedThing(..) ) import SimplStg ( stg2stg ) import CodeGen ( codeGen ) import CodeOutput ( codeOutput ) -import Module ( ModuleName, moduleName, mkHomeModule ) import CmdLineOpts -import DriverState ( v_HCHeader ) -import ErrUtils ( dumpIfSet_dyn, showPass, printError ) -import Util ( unJust ) +import DriverPhases ( isExtCoreFilename ) +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 MkExternalCore ( emitExternalCore ) +import ParserCore +import ParserCoreUtils +import Module ( Module, ModLocation(..), showModMsg ) +import FastString +import Maybes ( expectJust ) +import StringBuffer ( StringBuffer ) +import Bag ( unitBag, emptyBag ) import Monad ( when ) import Maybe ( isJust, fromJust ) import IO +import DATA_IOREF ( newIORef, readIORef ) +\end{code} -import MkExternalCore ( emitExternalCore ) + +%************************************************************************ +%* * + Initialisation +%* * +%************************************************************************ + +\begin{code} +newHscEnv :: GhciMode -> DynFlags -> IO HscEnv +newHscEnv ghci_mode dflags + = do { eps_var <- newIORef initExternalPackageState + ; us <- mkSplitUniqSupply 'r' + ; nc_var <- newIORef (initNameCache us knownKeyNames) + ; return (HscEnv { hsc_mode = ghci_mode, + hsc_dflags = dflags, + hsc_HPT = emptyHomePackageTable, + hsc_EPS = eps_var, + hsc_NC = nc_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} %************************************************************************ %* * -\subsection{The main compiler pipeline} + 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 + + -- 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) + + -- Did recompilation + | HscRecomp ModDetails -- new details (HomeSymbolTable additions) + (Maybe GlobalRdrEnv) + ModIface -- new iface (if any compilation was done) Bool -- stub_h exists Bool -- stub_c exists -#ifdef GHCI - (Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any -#else - (Maybe ()) -- no interpreted code whatsoever -#endif + (Maybe CompiledByteCode) + + +-- What to do when we have compiler error or warning messages +type MessageAction = Messages -> IO () -- no errors or warnings; the individual passes -- (parse/rename/typecheck) print messages themselves hscMain - :: GhciMode - -> DynFlags + :: HscEnv + -> MessageAction -- what to do with errors/warnings -> Module - -> ModuleLocation -- location info + -> ModLocation -- 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 { +hscMain hsc_env msg_act mod location + source_unchanged have_object maybe_old_iface + = do { + (recomp_reqd, maybe_checked_iface) <- + _scc_ "checkOldIface" + checkOldIface hsc_env mod + (ml_hi_file location) + 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 have_object mod location - maybe_checked_iface hst hit pcs_ch - }} + + ; what_next hsc_env msg_act have_object + mod location maybe_checked_iface + } --- 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 +-- hscNoRecomp definitely expects to have the old interface available +hscNoRecomp hsc_env msg_act have_object + mod location (Just old_iface) + | hsc_mode hsc_env == OneShot = do { - when (verbosity dflags > 0) $ + when (verbosity (hsc_dflags hsc_env) > 0) $ hPutStrLn stderr "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) $ + when (verbosity (hsc_dflags hsc_env) >= 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; + new_details <- _scc_ "tcRnIface" + typecheckIface hsc_env old_iface ; + dumpIfaceStats hsc_env ; - case maybe_tc_result of { - Nothing -> return (HscFail pcs_cl); - Just (pcs_tc, new_details) -> - - return (HscNoRecomp pcs_tc new_details old_iface) - }}} + return (HscNoRecomp new_details old_iface) + } -hscRecomp ghci_mode dflags have_object - mod location maybe_checked_iface hst hit pcs_ch +hscRecomp hsc_env msg_act have_object + mod location maybe_checked_iface = do { -- what target are we shooting for? - ; let toInterp = dopt_HscLang dflags == HscInterpreted - ; let toNothing = dopt_HscLang dflags == HscNothing + ; let one_shot = hsc_mode hsc_env == OneShot + ; let dflags = hsc_dflags hsc_env + ; let toInterp = dopt_HscLang dflags == HscInterpreted + ; let toCore = isJust (ml_hs_file location) && + isExtCoreFilename (fromJust (ml_hs_file location)) - ; when (ghci_mode /= OneShot && verbosity dflags >= 1) $ + ; when (not one_shot && verbosity dflags >= 1) $ hPutStrLn stderr ("Compiling " ++ showModMsg (not toInterp) mod location); + + ; front_res <- if toCore then + hscCoreFrontEnd hsc_env msg_act location + else + hscFileFrontEnd hsc_env msg_act location - ------------------- - -- 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 { + ; case front_res of + Left flure -> return flure; + Right ds_result -> do { + + + -- OMITTED: + -- ; seqList imported_modules (return ()) ------------------- - -- 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 + -- FLATTENING ------------------- - ; (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 + ; 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 - -- foreign_stuff - -- ds_details - -- new_iface + -- flat_result + -- pkg_rule_base ------------------- -- SIMPLIFY ------------------- - ; simpl_details - <- _scc_ "Core2Core" - core2core dflags pcs_middle hst dont_discard ds_details + ; simpl_result <- _scc_ "Core2Core" + core2core hsc_env flat_result ------------------- -- 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 + ; tidy_result <- _scc_ "CoreTidy" + tidyCorePgm hsc_env simpl_result - -- alive at this point: - -- tidy_details - -- new_iface - - ; emitExternalCore dflags new_iface tidy_details + -- Emit external core + ; emitExternalCore dflags tidy_result - ; let final_details = tidy_details {md_binds = []} - ; final_details `seq` return () + -- Alive at this point: + -- tidy_result, pcs_final + -- hsc_env ------------------- - -- PREPARE FOR CODE GENERATION - ------------------- - -- Do saturation and convert to A-normal form - ; prepd_details <- _scc_ "CorePrep" - corePrepPgm dflags tidy_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 <- _scc_ "MkFinalIface" + mkIface hsc_env location + maybe_checked_iface tidy_result + + + -- 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 + ; let { final_globals | one_shot = Nothing + | otherwise = Just $! (mg_rdr_env tidy_result) } + ; final_globals `seq` return () + + -- 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 $! ModDetails { + md_types = mg_types tidy_result, + md_insts = mg_insts tidy_result, + md_rules = mg_rules tidy_result } ------------------- -- CONVERT TO STG and COMPLETE CODE GENERATION - ------------------- - ; let - ModDetails{md_binds=binds, md_types=env_tc} = prepd_details + ; (stub_h_exists, stub_c_exists, maybe_bcos) + <- hscBackEnd dflags tidy_result - local_tycons = typeEnvTyCons env_tc - local_classes = typeEnvClasses env_tc + -- And the answer is ... + ; dumpIfaceStats hsc_env - imported_module_names = map ideclName (hsModuleImports rdr_module) + ; return (HscRecomp final_details + final_globals + final_iface + stub_h_exists stub_c_exists + maybe_bcos) + }} - mod_name_to_Module nm - = do m <- findModule nm ; return (fst (fromJust m)) +hscCoreFrontEnd hsc_env msg_act location = do { + ------------------- + -- PARSE + ------------------- + ; inp <- readFile (expectJust "hscCoreFrontEnd:hspp" (ml_hspp_file location)) + ; case parseCore inp 1 of + FailP s -> hPutStrLn stderr s >> return (Left HscFail) + OkP rdr_module -> do { + + ------------------- + -- RENAME and TYPECHECK + ------------------- + ; (tc_msgs, maybe_tc_result) <- _scc_ "TypeCheck" + tcRnExtCore hsc_env rdr_module + ; msg_act tc_msgs + ; case maybe_tc_result of { + Nothing -> return (Left HscFail); + Just mod_guts -> return (Right mod_guts) + -- No desugaring to do! + }}} + - (h_code, c_code, headers, fe_binders) = foreign_stuff +hscFileFrontEnd hsc_env msg_act location = do { + ------------------- + -- PARSE + ------------------- + ; maybe_parsed <- myParseModule (hsc_dflags hsc_env) + (expectJust "hscFrontEnd:hspp" (ml_hspp_file location)) - -- 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 + ; case maybe_parsed of { + Left err -> do { msg_act (unitBag err, emptyBag) ; + ; return (Left HscFail) ; + }; + Right rdr_module -> hscFrontEnd hsc_env msg_act rdr_module + }} + +-- Perform static/dynamic checks on the source code in a StringBuffer +-- This is a temporary solution: it'll read in interface files lazilly, whereas +-- we probably want to use the compilation manager to load in all the modules +-- in a project. +hscBufferFrontEnd :: HscEnv -> StringBuffer -> MessageAction -> IO HscResult +hscBufferFrontEnd hsc_env buffer msg_act = do + let loc = mkSrcLoc (mkFastString "*edit*") 1 0 + case unP parseModule (mkPState buffer loc (hsc_dflags hsc_env)) of + PFailed span err -> do + msg_act (emptyBag, unitBag (mkPlainErrMsg span err)) + return HscFail + POk _ rdr_module -> do + r <- hscFrontEnd hsc_env msg_act rdr_module + case r of + Left r -> return r + Right _ -> return HscChecked + - -- ...and add the string to the headers requested via command line - -- options - -- - ; fhdrs <- readIORef v_HCHeader - ; writeIORef v_HCHeader (fhdrs ++ foreign_headers) - ; imported_modules <- mapM mod_name_to_Module imported_module_names +hscFrontEnd hsc_env msg_act rdr_module = do { + ------------------- + -- RENAME and TYPECHECK + ------------------- + ; (tc_msgs, maybe_tc_result) <- _scc_ "Typecheck-Rename" + tcRnModule hsc_env rdr_module + ; msg_act tc_msgs + ; case maybe_tc_result of { + Nothing -> return (Left HscFail); + Just tc_result -> do { - ; (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 + ------------------- + -- DESUGAR + ------------------- + ; (warns, maybe_ds_result) <- _scc_ "DeSugar" + deSugar hsc_env tc_result + ; msg_act (warns, emptyBag) + ; case maybe_ds_result of + Nothing -> return (Left HscFail); + Just ds_result -> return (Right ds_result); + }}} + +hscBackEnd dflags + ModGuts{ -- This is the last use of the ModGuts in a compilation. + -- From now on, we just use the bits we need. + mg_module = this_mod, + mg_binds = core_binds, + mg_types = type_env, + mg_dir_imps = dir_imps, + mg_foreign = foreign_stubs, + mg_deps = dependencies } = do { - -- Fill in the code-gen info - writeIORef cg_info_ref (Just emptyNameEnv) + ------------------- + -- PREPARE FOR CODE GENERATION + -- Do saturation and convert to A-normal form + prepd_binds <- _scc_ "CorePrep" + corePrepPgm dflags core_binds type_env; - ------------------ BUILD THE NEW ModIface ------------ - final_iface <- _scc_ "MkFinalIface" - mkFinalIface ghci_mode dflags location - maybe_checked_iface new_iface tidy_details + case dopt_HscLang dflags of + HscNothing -> return (False, False, Nothing) - return ( False, False, Just (bcos,itbl_env), final_iface ) + HscInterpreted -> +#ifdef GHCI + do ----------------- Generate byte code ------------------ + comp_bc <- byteCodeGen dflags prepd_binds type_env + + ------------------ Create f-x-dynamic C-side stuff --- + (istub_h_exists, istub_c_exists) + <- outputForeignStubs dflags foreign_stubs + + return ( istub_h_exists, istub_c_exists, Just comp_bc ) #else - then error "GHC not compiled with interpreter" + panic "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) - }}}}}}} + other -> + do + ----------------- Convert to STG ------------------ + (stg_binds, cost_centre_info) <- _scc_ "CoreToStg" + myCoreToStg dflags this_mod prepd_binds + + ------------------ Code generation ------------------ + abstractC <- _scc_ "CodeGen" + codeGen dflags this_mod type_env foreign_stubs + dir_imps cost_centre_info stg_binds + + ------------------ Code output ----------------------- + (stub_h_exists, stub_c_exists) + <- codeOutput dflags this_mod 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 src_filename - buf <- hGetStringBuffer True{-expand tabs-} src_filename + let loc = mkSrcLoc (mkFastString src_filename) 1 0 - let glaexts | dopt Opt_GlasgowExts dflags = 1# - | otherwise = 0# + case unP parseModule (mkPState buf loc dflags) of { - case parseModule buf PState{ bol = 0#, atbol = 1#, - context = [], glasgow_exts = glaexts, - loc = mkSrcLoc (_PK_ src_filename) 1 } of { + PFailed span err -> return (Left (mkPlainErrMsg span err)); - 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 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 + coreToStg dflags prepd_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) + return (stg_binds2, cost_centre_info) \end{code} @@ -466,22 +491,6 @@ myCoreToStg dflags this_mod tidy_binds %* * %************************************************************************ -\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 @@ -509,88 +518,66 @@ A naked expression returns a singleton Name [it]. 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 + -> InteractiveContext -- Context for compiling + -> String -- The statement + -> IO (Maybe (InteractiveContext, [Name], HValue)) - -- Tidy it (temporary, until coreSat does cloning) - ; tidy_expr <- tidyCoreExpr simpl_expr +hscStmt hsc_env icontext stmt + = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) stmt + ; case maybe_stmt of { + Nothing -> return Nothing ; + Just parsed_stmt -> do { - -- Prepare for codegen - ; prepd_expr <- corePrepExpr dflags tidy_expr + -- Rename and typecheck it + 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 { - ; 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 + -- 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 (pcs2, Just (global_bound_ids, ty, bcos)) + ; return (Just (new_ic, bound_names, hval)) + }}}}} - }}}}} +hscTcExpr -- Typecheck an expression (but don't run it) + :: HscEnv + -> InteractiveContext -- Context for compiling + -> String -- The expression + -> IO (Maybe Type) + +hscTcExpr hsc_env icontext expr + = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) expr + ; case maybe_stmt of { + Just (L _ (ExprStmt expr _)) + -> tcRnExpr hsc_env icontext expr ; + Just other -> do { hPutStrLn stderr ("not an expression: `" ++ expr ++ "'") ; + return Nothing } ; + Nothing -> return Nothing } } +\end{code} -hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt) +\begin{code} +hscParseStmt :: DynFlags -> String -> IO (Maybe (LStmt RdrName)) hscParseStmt dflags str - = do -------------------------- Parser ---------------- - showPass dflags "Parser" + = do 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("") 1 } of { + case unP parseStmt (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; @@ -599,7 +586,6 @@ hscParseStmt dflags str --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) }} @@ -615,175 +601,105 @@ hscParseStmt dflags str \begin{code} #ifdef GHCI hscThing -- like hscStmt, but deals with a single identifier - :: DynFlags - -> HomeSymbolTable - -> HomeIfaceTable - -> PersistentCompilerState -- IN: persistent compiler state + :: HscEnv -> InteractiveContext -- Context for compiling -> String -- The identifier - -> IO ( PersistentCompilerState, - [TyThing] ) + -> IO [(IfaceDecl, Fixity)] -hscThing dflags hst hit pcs0 ic str - = do maybe_rdr_name <- myParseIdentifier dflags str +hscThing hsc_env ic str + = do maybe_rdr_name <- myParseIdentifier (hsc_dflags hsc_env) 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) } - }}} + Nothing -> return []; + Just (L _ rdr_name) -> do + + maybe_tc_result <- tcRnThing hsc_env ic rdr_name + + case maybe_tc_result of { + Nothing -> return [] ; + Just things -> return things + }} myParseIdentifier dflags str = do buf <- stringToStringBuffer str - let glaexts | dopt Opt_GlasgowExts dflags = 1# - | otherwise = 0# + let loc = mkSrcLoc FSLIT("") 1 0 + case unP parseIdentifier (mkPState buf loc dflags) of - case parseIdentifier buf - PState{ bol = 0#, atbol = 1#, - context = [], glasgow_exts = glaexts, - loc = mkSrcLoc SLIT("") 1 } of + PFailed span err -> do { printError span err; + return Nothing } - 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) } + POk _ rdr_name -> return (Just rdr_name) #endif \end{code} %************************************************************************ %* * -\subsection{Find all the things defined in a module} + Desugar, simplify, convert to bytecode, and link an expression %* * %************************************************************************ \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) - }}}} +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) + ; tidy_expr <- tidyCoreExpr 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{Initial persistent state} + Statistics on reading interfaces %* * %************************************************************************ \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 - } - ) +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 - 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 + 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}