X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FHscMain.lhs;h=b174e5e419b37854a69c0349dd48c63c8902b6a0;hb=de1d4a16d94fa13e9d40a1ac755eae6249595e66;hp=5ae2e61ce12ec06bbf355714ae27d9b0799cb553;hpb=675a9a5df03d6ecf3f307f666d2c61d2e5b4d2a0;p=ghc-hetmet.git diff --git a/ghc/compiler/main/HscMain.lhs b/ghc/compiler/main/HscMain.lhs index 5ae2e61..b174e5e 100644 --- a/ghc/compiler/main/HscMain.lhs +++ b/ghc/compiler/main/HscMain.lhs @@ -1,76 +1,104 @@ % % (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, #ifdef GHCI - hscExpr, + hscStmt, hscThing, hscModuleContents, #endif initPersistentCompilerState ) where #include "HsVersions.h" #ifdef GHCI -import RdrHsSyn ( RdrNameHsExpr ) -import Rename ( renameExpr ) -import StringBuffer ( stringToStringBuffer, freeStringBuffer ) -import Unique ( Uniquable(..) ) -import Type ( Type, splitTyConApp_maybe ) -import PrelNames ( ioTyConKey ) +import Interpreter import ByteCodeGen ( byteCodeGen ) +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 Type ( Type ) +import Id ( Id, idName, setGlobalIdDetails ) +import IdInfo ( GlobalIdDetails(VanillaGlobal) ) +import Name ( isInternalName ) +import NameEnv ( lookupNameEnv ) +import Module ( lookupModuleEnv ) +import RdrName ( rdrEnvElts ) +import PrelNames ( iNTERACTIVE ) +import StringBuffer ( stringToStringBuffer ) +import Maybes ( catMaybes ) + +import List ( nub ) #endif import HsSyn -import StringBuffer ( hGetStringBuffer ) +import RdrName ( mkRdrOrig ) +import Id ( idName ) +import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) ) +import StringBuffer ( hGetStringBuffer, freeStringBuffer ) import Parser -import Lex ( PState(..), ParseResult(..) ) +import Lex ( ParseResult(..), ExtFlags(..), mkPState ) import SrcLoc ( mkSrcLoc ) -import Rename ( checkOldIface, renameModule, closeIfaceDecls ) +import Finder ( findModule ) +import Rename ( checkOldIface, renameModule, renameExtCore, + closeIfaceDecls, RnResult(..) ) import Rules ( emptyRuleBase ) import PrelInfo ( wiredInThingEnv, wiredInThings ) -import PrelNames ( knownKeyNames ) -import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails, - writeIface, pprIface ) +import PrelRules ( builtinRules ) +import PrelNames ( knownKeyNames, gHC_PRIM_Name ) +import MkIface ( mkFinalIface ) import TcModule import InstEnv ( emptyInstEnv ) import Desugar +import Flattening ( flatten, flattenExpr ) import SimplCore import CoreUtils ( coreBindsSize ) -import CoreTidy ( tidyCorePgm ) -import CoreSat +import TidyPgm ( tidyCorePgm ) +import CorePrep ( corePrepPgm ) +import StgSyn import CoreToStg ( coreToStg ) import SimplStg ( stg2stg ) import CodeGen ( codeGen ) -import CodeOutput ( codeOutput ) +import CodeOutput ( codeOutput, outputForeignStubs ) import Module ( ModuleName, moduleName, mkHomeModule ) import CmdLineOpts -import ErrUtils ( dumpIfSet_dyn, showPass ) -import Util ( unJust ) +import DriverState ( v_HCHeader ) +import DriverPhases ( isExtCore_file ) +import ErrUtils ( dumpIfSet_dyn, showPass, printError ) import UniqSupply ( mkSplitUniqSupply ) -import Bag ( emptyBag ) +import Bag ( consBag, 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 HscTypes import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM ) import OccName ( OccName ) -import Name ( Name, nameModule, nameOccName, getName, isGlobalName, - emptyNameEnv ) -import Module ( Module, lookupModuleEnvByName ) +import Name ( Name, nameModule, nameOccName, getName ) +import NameEnv ( emptyNameEnv, mkNameEnv ) +import Module ( Module ) +import FastString +import Maybes ( expectJust ) +import Util ( seqList ) + +import IOExts ( newIORef, readIORef, writeIORef, + unsafePerformIO ) import Monad ( when ) -import Maybe ( isJust ) +import Maybe ( isJust, fromJust ) import IO + +import MkExternalCore ( emitExternalCore ) +import ParserCore +import ParserCoreUtils + \end{code} @@ -92,10 +120,13 @@ data HscResult | HscRecomp PersistentCompilerState -- updated PCS ModDetails -- new details (HomeSymbolTable additions) ModIface -- new iface (if any compilation was done) - (Maybe String) -- generated stub_h filename (in /tmp) - (Maybe String) -- generated stub_c filename (in /tmp) + Bool -- stub_h exists + Bool -- stub_c exists +#ifdef GHCI (Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any - +#else + (Maybe ()) -- no interpreted code whatsoever +#endif -- no errors or warnings; the individual passes -- (parse/rename/typecheck) print messages themselves @@ -103,23 +134,27 @@ data HscResult hscMain :: GhciMode -> DynFlags - -> Bool -- source unchanged? + -> Module -> ModuleLocation -- location info + -> Bool -- True <=> source unchanged + -> Bool -- True <=> have an object file (for msgs only) -> Maybe ModIface -- old interface, if available -> HomeSymbolTable -- for home module ModDetails -> HomeIfaceTable -> PersistentCompilerState -- IN: persistent compiler state -> IO HscResult -hscMain ghci_mode dflags source_unchanged location maybe_old_iface hst hit pcs - = do { +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)) - <- checkOldIface ghci_mode dflags hit hst pcs - (unJust "hscMain" (ml_hi_file location)) + <- _scc_ "checkOldIface" + checkOldIface ghci_mode dflags hit hst pcs mod (ml_hi_file location) source_unchanged maybe_old_iface; if errs_found then @@ -130,23 +165,26 @@ hscMain ghci_mode dflags source_unchanged location maybe_old_iface hst hit pcs what_next | recomp_reqd || no_old_iface = hscRecomp | otherwise = hscNoRecomp ; - what_next ghci_mode dflags location maybe_checked_iface - hst hit pcs_ch + what_next ghci_mode dflags have_object mod location + maybe_checked_iface hst hit pcs_ch }} -- we definitely expect to have the old interface available -hscNoRecomp ghci_mode dflags location (Just old_iface) hst hit pcs_ch +hscNoRecomp ghci_mode dflags have_object + mod location (Just old_iface) hst hit pcs_ch | ghci_mode == OneShot = do { - hPutStrLn stderr "compilation IS NOT required"; + when (verbosity dflags > 0) $ + hPutStrLn stderr "compilation IS NOT required"; let { bomb = panic "hscNoRecomp:OneShot" }; return (HscNoRecomp pcs_ch bomb bomb) } | otherwise = do { - hPutStr stderr "compilation IS NOT required"; - when (verbosity dflags /= 1) $ hPutStrLn stderr ""; + when (verbosity dflags >= 1) $ + hPutStrLn stderr ("Skipping " ++ + showModMsg have_object mod location); -- CLOSURE (pcs_cl, closure_errs, cl_hs_decls) @@ -156,148 +194,320 @@ hscNoRecomp ghci_mode dflags location (Just old_iface) hst hit pcs_ch else do { -- TYPECHECK - maybe_tc_result <- typecheckModule dflags pcs_cl hst - old_iface alwaysQualify cl_hs_decls; + maybe_tc_result + <- typecheckIface dflags pcs_cl hst old_iface cl_hs_decls; + case maybe_tc_result of { Nothing -> return (HscFail pcs_cl); - Just (pcs_tc, tc_result) -> do { + Just (pcs_tc, new_details) -> - let env_tc = tc_env tc_result - local_rules = tc_rules tc_result - ; - -- 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) - }}}} + }}} - -hscRecomp ghci_mode dflags location maybe_checked_iface hst hit pcs_ch +hscRecomp ghci_mode dflags have_object + mod location maybe_checked_iface hst hit pcs_ch = do { - ; when (verbosity dflags >= 1) $ - hPutStr stderr "compilation IS required"; - -- mode -v1 tries to keep everything on one line - when (verbosity dflags > 1) $ - hPutStrLn stderr ""; - -- what target are we shooting for? - ; let toInterp = dopt_HscLang dflags == HscInterpreted + ; let toInterp = dopt_HscLang dflags == HscInterpreted + ; let toNothing = dopt_HscLang dflags == HscNothing + ; let toCore = isJust (ml_hs_file location) && + isExtCore_file (fromJust (ml_hs_file location)) + + ; when (ghci_mode /= OneShot && verbosity dflags >= 1) $ + hPutStrLn stderr ("Compiling " ++ + showModMsg (not toInterp) mod location); + + ; front_res <- + (if toCore then hscCoreFrontEnd else hscFrontEnd) + ghci_mode dflags location hst hit pcs_ch + ; case front_res of + Left flure -> return flure; + Right (this_mod, rdr_module, + dont_discard, new_iface, + pcs_tc, ds_details, foreign_stuff) -> do { + + let { + imported_module_names = + filter (/= gHC_PRIM_Name) $ + map ideclName (hsModuleImports rdr_module); + + imported_modules = + map (moduleNameToModule hit (pcs_PIT pcs_tc)) + imported_module_names; + } + + -- force this out now, so we don't keep a hold of rdr_module or pcs_tc + ; seqList imported_modules (return ()) + + ------------------- + -- FLATTENING + ------------------- + ; flat_details + <- _scc_ "Flattening" + flatten dflags pcs_tc hst ds_details + + ; 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 + +-- Should we remove bits of flat_details at this point? +-- ; flat_details <- case flat_details of +-- ModDetails { md_binds = binds } -> +-- return ModDetails { md_binds = binds, +-- md_rules = [], +-- md_types = emptyTypeEnv, +-- md_insts = [] } + + -- alive at this point: + -- pcs_middle + -- foreign_stuff + -- flat_details + -- imported_modules (seq'd) + -- new_iface + + ------------------- + -- SIMPLIFY + ------------------- + ; simpl_details + <- _scc_ "Core2Core" + core2core dflags pcs_middle hst dont_discard flat_details + + ------------------- + -- TIDY + ------------------- + ; cg_info_ref <- newIORef Nothing ; + ; let cg_info :: CgInfoEnv + cg_info = unsafePerformIO $ do { + maybe_cg_env <- readIORef cg_info_ref ; + case maybe_cg_env of + Just env -> return env + Nothing -> do { printError "Urk! Looked at CgInfo too early!"; + return emptyNameEnv } } + -- cg_info_ref will be filled in just after restOfCodeGeneration + -- Meanwhile, tidyCorePgm is careful not to look at cg_info! + + ; (pcs_simpl, tidy_details) + <- _scc_ "CoreTidy" + tidyCorePgm dflags this_mod pcs_middle cg_info simpl_details + + ; pcs_final <- if ghci_mode == OneShot then initPersistentCompilerState + else return pcs_simpl + + -- alive at this point: + -- tidy_details + -- new_iface + + ; emitExternalCore dflags new_iface tidy_details + + ; let final_details = tidy_details {md_binds = []} + ; final_details `seq` return () + + ------------------- + -- PREPARE FOR CODE GENERATION + ------------------- + -- Do saturation and convert to A-normal form + ; prepd_details <- _scc_ "CorePrep" + corePrepPgm dflags tidy_details + + ------------------- + -- CONVERT TO STG and COMPLETE CODE GENERATION + ------------------- + ; let + ModDetails{md_binds=binds, md_types=env_tc} = prepd_details + + local_tycons = typeEnvTyCons env_tc + local_classes = typeEnvClasses env_tc + + (h_code, c_code, headers, fe_binders) = foreign_stuff + -- turn the list of headers requested in foreign import + -- declarations into a string suitable for emission into generated + -- C code... + -- + foreign_headers = + unlines + . map (\fname -> "#include \"" ++ unpackFS fname ++ "\"") + . reverse + $ headers + + -- ...and add the string to the headers requested via command line + -- options + -- + ; fhdrs <- readIORef v_HCHeader + ; writeIORef v_HCHeader (fhdrs ++ foreign_headers) + + ; (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 + + -- Fill in the code-gen info + writeIORef cg_info_ref (Just emptyNameEnv) + + ------------------ BUILD THE NEW ModIface ------------ + final_iface <- _scc_ "MkFinalIface" + mkFinalIface ghci_mode dflags location + maybe_checked_iface new_iface tidy_details + + ------------------ Create f-x-dynamic C-side stuff --- + (istub_h_exists, istub_c_exists) + <- outputForeignStubs dflags c_code h_code + + return ( istub_h_exists, istub_c_exists, + Just (bcos,itbl_env), final_iface ) +#else + then error "GHC not compiled with interpreter" +#endif + + else do + ----------------- Convert to STG ------------------ + (stg_binds, cost_centre_info, stg_back_end_info) + <- _scc_ "CoreToStg" + myCoreToStg dflags this_mod binds + + -- Fill in the code-gen info for the earlier tidyCorePgm + writeIORef cg_info_ref (Just stg_back_end_info) + + ------------------ BUILD THE NEW ModIface ------------ + final_iface <- _scc_ "MkFinalIface" + mkFinalIface ghci_mode dflags location + maybe_checked_iface new_iface tidy_details + if toNothing + then do + return (False, False, Nothing, final_iface) + else do + ------------------ Code generation ------------------ + abstractC <- _scc_ "CodeGen" + codeGen dflags this_mod imported_modules + cost_centre_info fe_binders + local_tycons stg_binds + + ------------------ Code output ----------------------- + (stub_h_exists, stub_c_exists) + <- codeOutput dflags this_mod [] --local_tycons + binds stg_binds + c_code h_code abstractC + + return (stub_h_exists, stub_c_exists, Nothing, final_iface) + + -- and the answer is ... + ; return (HscRecomp pcs_final + final_details + final_iface + stub_h_exists stub_c_exists + maybe_bcos) + }} + +hscCoreFrontEnd ghci_mode dflags location hst hit pcs_ch = do { ------------------- -- 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 { + ; inp <- readFile (expectJust "hscCoreFrontEnd:hspp" (ml_hspp_file location)) + ; case parseCore inp 1 of + FailP s -> hPutStrLn stderr s >> return (Left (HscFail pcs_ch)); + OkP rdr_module -> do { ; let this_mod = mkHomeModule (hsModuleName rdr_module) ------------------- -- RENAME ------------------- - ; (pcs_rn, maybe_rn_result) - <- _scc_ "Rename" - renameModule dflags hit hst pcs_ch this_mod rdr_module + ; (pcs_rn, print_unqual, maybe_rn_result) + <- renameExtCore dflags hit hst pcs_ch this_mod rdr_module ; case maybe_rn_result of { - Nothing -> return (HscFail pcs_rn); - Just (print_unqualified, (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 + Nothing -> return (Left (HscFail pcs_ch)); + Just (dont_discard, new_iface, rn_decls) -> do { ------------------- -- TYPECHECK ------------------- ; maybe_tc_result - <- _scc_ "TypeCheck" typecheckModule dflags pcs_rn hst new_iface - print_unqualified rn_hs_decls + <- _scc_ "TypeCheck" + typecheckCoreModule dflags pcs_rn hst new_iface rn_decls ; case maybe_tc_result of { - Nothing -> return (HscFail pcs_rn); + Nothing -> return (Left (HscFail pcs_ch)); Just (pcs_tc, tc_result) -> do { - ; let env_tc = tc_env tc_result - ------------------- -- DESUGAR ------------------- - ; (ds_binds, ds_rules, foreign_stuff) - <- _scc_ "DeSugar" - deSugar dflags pcs_tc hst this_mod print_unqualified tc_result + ; (ds_details, foreign_stuff) <- deSugarCore tc_result + ; return (Right (this_mod, rdr_module, dont_discard, new_iface, + pcs_tc, ds_details, foreign_stuff)) + }}}}}} + +hscFrontEnd ghci_mode dflags location hst hit pcs_ch = do { ------------------- - -- SIMPLIFY, TIDY-CORE + -- PARSE ------------------- - -- 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 - + ; maybe_parsed <- myParseModule dflags + (expectJust "hscRecomp:hspp" (ml_hspp_file location)) + ; case maybe_parsed of { + Nothing -> return (Left (HscFail pcs_ch)); + Just rdr_module -> do { + ; let this_mod = mkHomeModule (hsModuleName rdr_module) + ------------------- - -- BUILD THE NEW ModDetails AND ModIface + -- RENAME ------------------- - ; 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 + ; (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 (Left (HscFail pcs_ch)); + Just (dont_discard, new_iface, rn_result) -> do { ------------------- - -- CONVERT TO STG and COMPLETE CODE GENERATION + -- TYPECHECK ------------------- - ; (maybe_stub_h_filename, maybe_stub_c_filename, maybe_bcos) - <- restOfCodeGeneration dflags toInterp this_mod - (map ideclName (hsModuleImports rdr_module)) - foreign_stuff env_tc tidy_binds - hit (pcs_PIT pcs_simpl) - - -- and the answer is ... - ; return (HscRecomp pcs_simpl new_details final_iface - maybe_stub_h_filename maybe_stub_c_filename - maybe_bcos) - }}}}}}} - - - -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 + ; maybe_tc_result + <- _scc_ "TypeCheck" + typecheckModule dflags pcs_rn hst print_unqual rn_result + ; case maybe_tc_result of { + Nothing -> return (Left (HscFail pcs_ch)); + Just (pcs_tc, tc_result) -> do { + + ------------------- + -- DESUGAR + ------------------- + ; (ds_details, foreign_stuff) + <- _scc_ "DeSugar" + deSugar dflags pcs_tc hst this_mod print_unqual tc_result + ; return (Right (this_mod, rdr_module, dont_discard, new_iface, + pcs_tc, ds_details, foreign_stuff)) + }}}}}}} myParseModule dflags src_filename = do -------------------------- Parser ---------------- showPass dflags "Parser" _scc_ "Parser" do + buf <- hGetStringBuffer src_filename - buf <- hGetStringBuffer True{-expand tabs-} src_filename + let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags, + ffiEF = dopt Opt_FFI dflags, + withEF = dopt Opt_With dflags, + parrEF = dopt Opt_PArr dflags} + loc = mkSrcLoc (mkFastString src_filename) 1 - 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 { + case parseModule buf (mkPState loc exts) of { PFailed err -> do { hPutStrLn stderr (showSDoc err); + freeStringBuffer buf; return Nothing }; POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do { @@ -308,184 +518,322 @@ myParseModule dflags src_filename (ppSourceStats False rdr_module) ; return (Just 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 saturation and convert to A-normal form - -- NOTE: subsequent passes may not transform the syntax, only annotate it - saturated <- coreSatPgm dflags simplified - - -- Do the final tidy-up - (pcs', tidy_binds, tidy_orphan_rules) - <- tidyCorePgm dflags this_mod pcs saturated 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 this_mod tidy_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 + -- thoroughout code generation -- JRS + -- + -- This is still necessary. -- SDM (10 Dec 2001) - --let bcos = byteCodeGen dflags tidy_binds local_tycons local_classes + stg_binds <- _scc_ "Core2Stg" + coreToStg dflags tidy_binds - - 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_ "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) - where - local_tycons = typeEnvTyCons env_tc - local_classes = typeEnvClasses env_tc + return (stg_binds2, cost_centre_info, env_rhs) \end{code} %************************************************************************ %* * -\subsection{Compiling an expression} +\subsection{Compiling a do-statement} %* * %************************************************************************ \begin{code} #ifdef GHCI -hscExpr +hscStmt :: DynFlags - -> Bool -- True <=> wrap in 'print' to get a result of IO type -> HomeSymbolTable -> HomeIfaceTable -> PersistentCompilerState -- IN: persistent compiler state - -> Module -- Context for compiling - -> String -- The expression + -> InteractiveContext -- Context for compiling + -> String -- The statement + -> Bool -- just treat it as an expression -> IO ( PersistentCompilerState, - Maybe (UnlinkedBCOExpr, PrintUnqualified, Type) ) + 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 +the same length as the list of names; add them to the ClosureEnv. + +A naked expression returns a singleton Name [it]. + + What you type The IO [HValue] that hscStmt returns + ------------- ------------------------------------ + let pat = expr ==> let pat = expr in return [coerce HVal x, coerce HVal y, ...] + bindings: [x,y,...] + + pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...] + bindings: [x,y,...] -hscExpr dflags wrap_io hst hit pcs0 this_module expr - = do { - maybe_parsed <- hscParseExpr dflags expr; - case maybe_parsed of + expr (of IO type) ==> expr >>= \ v -> return [v] + [NB: result not printed] bindings: [it] + + + expr (of non-IO type, + result showable) ==> let v = expr in print v >> return [v] + bindings: [it] + + expr (of non-IO type, + 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_expr -> do { + 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, maybe_renamed_expr) <- - renameExpr dflags hit hst pcs0 this_module parsed_expr; - case maybe_renamed_expr of - Nothing -> return ({-WAS:pcs1-} pcs0, Nothing) - Just (print_unqual, rn_expr) -> do { + (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 - <- typecheckExpr dflags wrap_io pcs1 hst print_unqual this_module rn_expr; - case maybe_tc_return of { - Nothing -> return ({-WAS:pcs1-} pcs0, Nothing); - Just (pcs2, tc_expr, ty) -> do + 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 this_module - print_unqual tc_expr; + ds_expr <- deSugarExpr dflags pcs2 hst iNTERACTIVE print_unqual tc_expr + -- Flatten it + ; flat_expr <- flattenExpr dflags pcs2 hst ds_expr + -- Simplify it - simpl_expr <- simplifyExpr dflags pcs2 hst ds_expr; + ; simpl_expr <- simplifyExpr dflags pcs2 hst flat_expr - -- Saturate it - sat_expr <- coreSatExpr dflags simpl_expr; + -- Tidy it (temporary, until coreSat does cloning) + ; tidy_expr <- tidyCoreExpr simpl_expr - -- ToDo: need to do SRTs? + -- Prepare for codegen + ; prepd_expr <- corePrepExpr dflags tidy_expr -- Convert to BCOs - bcos <- coreExprToBCOs dflags sat_expr + ; bcos <- coreExprToBCOs dflags prepd_expr + + ; 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 - return (pcs2, Just (bcos, print_unqual, ty)); - }}}} + ; return (pcs2, Just (global_bound_ids, ty, bcos)) -hscParseExpr :: DynFlags -> String -> IO (Maybe RdrNameHsExpr) -hscParseExpr dflags str + }}}}} + +hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt) +hscParseStmt dflags str = do -------------------------- Parser ---------------- showPass dflags "Parser" - _scc_ "Parser" do + _scc_ "Parser" do buf <- stringToStringBuffer str - let glaexts | dopt Opt_GlasgowExts dflags = 1# - | otherwise = 0# + let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags, + ffiEF = dopt Opt_FFI dflags, + withEF = dopt Opt_With dflags, + parrEF = dopt Opt_PArr dflags} + loc = mkSrcLoc FSLIT("") 1 - case parseExpr buf PState{ bol = 0#, atbol = 1#, - context = [], glasgow_exts = glaexts, - loc = mkSrcLoc SLIT("") 0 } of { + case parseStmt buf (mkPState loc exts) of { PFailed err -> do { hPutStrLn stderr (showSDoc err); - freeStringBuffer buf; +-- Not yet implemented in <4.11 freeStringBuffer buf; return Nothing }; - POk _ rdr_expr -> do { + -- no stmt: the line consisted of just space or comments + POk _ Nothing -> return Nothing; + + POk _ (Just rdr_stmt) -> 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_expr); - return (Just rdr_expr) + dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_stmt); + return (Just rdr_stmt) }} #endif \end{code} %************************************************************************ %* * +\subsection{Getting information about an identifer} +%* * +%************************************************************************ + +\begin{code} +#ifdef GHCI +hscThing -- like hscStmt, but deals with a single identifier + :: DynFlags + -> HomeSymbolTable + -> HomeIfaceTable + -> PersistentCompilerState -- IN: persistent compiler state + -> InteractiveContext -- Context for compiling + -> String -- The identifier + -> IO ( PersistentCompilerState, + [TyThing] ) + +hscThing dflags hst hit pcs0 ic str + = do maybe_rdr_name <- myParseIdentifier dflags str + case maybe_rdr_name of { + Nothing -> return (pcs0, []); + Just rdr_name -> do + + -- if the identifier is a constructor (begins with an + -- upper-case letter), then we need to consider both + -- constructor and type class identifiers. + let rdr_names + | occNameSpace occ == dataName = [ rdr_name, tccls_name ] + | otherwise = [ rdr_name ] + where + occ = rdrNameOcc rdr_name + tccls_occ = setOccNameSpace occ tcClsName + tccls_name = setRdrNameOcc rdr_name tccls_occ + + (pcs, unqual, maybe_rn_result) <- + renameRdrName dflags hit hst pcs0 ic rdr_names + + case maybe_rn_result of { + Nothing -> return (pcs, []); + Just (names, decls) -> do { + + maybe_pcs <- typecheckExtraDecls dflags pcs hst unqual + iNTERACTIVE decls; + + case maybe_pcs of { + Nothing -> return (pcs, []); + Just pcs -> + let do_lookup n + | isInternalName n = lookupNameEnv (ic_type_env ic) n + | otherwise = lookupType hst (pcs_PTE pcs) n + + maybe_ty_things = map do_lookup names + in + return (pcs, catMaybes maybe_ty_things) } + }}} + +myParseIdentifier dflags str + = do buf <- stringToStringBuffer str + + let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags, + ffiEF = dopt Opt_FFI dflags, + withEF = dopt Opt_With dflags, + parrEF = dopt Opt_PArr dflags} + loc = mkSrcLoc FSLIT("") 1 + + case parseIdentifier buf (mkPState loc exts) of + + PFailed err -> do { hPutStrLn stderr (showSDoc err); + freeStringBuffer buf; + return Nothing } + + POk _ rdr_name -> do { --should, but can't: freeStringBuffer buf; + return (Just rdr_name) } +#endif +\end{code} + +%************************************************************************ +%* * +\subsection{Find all the things defined in a module} +%* * +%************************************************************************ + +\begin{code} +#ifdef GHCI +hscModuleContents + :: DynFlags + -> HomeSymbolTable + -> HomeIfaceTable + -> PersistentCompilerState -- IN: persistent compiler state + -> Module -- module to inspect + -> Bool -- grab just the exports, or the whole toplev + -> IO (PersistentCompilerState, Maybe [TyThing]) + +hscModuleContents dflags hst hit pcs0 mod exports_only = do { + + -- slurp the interface if necessary + (pcs1, print_unqual, maybe_rn_stuff) + <- slurpIface dflags hit hst pcs0 mod; + + case maybe_rn_stuff of { + Nothing -> return (pcs0, Nothing); + Just (names, rn_decls) -> do { + + -- Typecheck the declarations + maybe_pcs <- + typecheckExtraDecls dflags pcs1 hst print_unqual iNTERACTIVE rn_decls; + + case maybe_pcs of { + Nothing -> return (pcs1, Nothing); + Just pcs2 -> + + let { all_names + | exports_only = names + | otherwise = + let { iface = fromJust (lookupModuleEnv hit mod); + env = fromJust (mi_globals iface); + range = rdrEnvElts env; + } in + -- grab all the things from the global env that are locally def'd + nub [ n | elts <- range, GRE n LocalDef _ <- elts ]; + + pte = pcs_PTE pcs2; + + ty_things = map (fromJust . lookupType hst pte) all_names; + + } in + + return (pcs2, Just ty_things) + }}}} +#endif +\end{code} + +%************************************************************************ +%* * \subsection{Initial persistent state} %* * %************************************************************************ @@ -511,10 +859,18 @@ initPersistentRenamerState :: IO PersistentRenamerState nsIPs = emptyFM }, prsDecls = (emptyNameEnv, 0), prsInsts = (emptyBag, 0), - prsRules = (emptyBag, 0), + prsRules = foldr add_rule (emptyBag, 0) builtinRules, prsImpMods = emptyFM } ) + where + add_rule (name,rule) (rules, n_rules) + = (gated_decl `consBag` rules, n_rules+1) + where + gated_decl = (gate_fn, (mod, IfaceRuleOut rdr_name rule)) + mod = nameModule name + rdr_name = mkRdrOrig (moduleName mod) (nameOccName name) + gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible initOrigNames :: FiniteMap (ModuleName,OccName) Name initOrigNames @@ -523,14 +879,4 @@ initOrigNames 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 --} \end{code}