X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=ghc%2Fcompiler%2Fmain%2FHscMain.lhs;h=b61356cda9c50cf198d7d79b71aa5b6f9b32e527;hb=dd6f34b632c29306e56b6bdf232316af26800a4f;hp=2c1be78b43accccfac7207c5a0c071a2718eee2e;hpb=99073d876ea762016683fb0b22b9d343ff864eb4;p=ghc-hetmet.git diff --git a/ghc/compiler/main/HscMain.lhs b/ghc/compiler/main/HscMain.lhs index 2c1be78..d8f4601 100644 --- a/ghc/compiler/main/HscMain.lhs +++ b/ghc/compiler/main/HscMain.lhs @@ -1,49 +1,89 @@ % % (c) The GRASP/AQUA Project, Glasgow University, 1993-2000 % + \section[GHC_Main]{Main driver for Glasgow Haskell compiler} \begin{code} -module HscMain ( hscMain ) where +module HscMain ( HscResult(..), hscMain, +#ifdef GHCI + hscStmt, hscThing, +#endif + initPersistentCompilerState ) where #include "HsVersions.h" -import IO ( hPutStr, stderr ) +#ifdef GHCI +import ByteCodeGen ( byteCodeGen ) +import CoreTidy ( tidyCoreExpr ) +import CorePrep ( corePrepExpr ) +import Rename ( renameStmt, renameRdrName ) +import RdrName ( mkUnqual, mkQual ) +import RdrHsSyn ( RdrNameStmt ) +import OccName ( varName, dataName, tcClsName ) +import Type ( Type ) +import Id ( Id, idName, setGlobalIdDetails ) +import IdInfo ( GlobalIdDetails(VanillaGlobal) ) +import HscTypes ( InteractiveContext(..) ) +import PrelNames ( iNTERACTIVE ) +import StringBuffer ( stringToStringBuffer ) +import FastString ( mkFastString ) +import Char ( isLower ) +import DriverUtil ( split_longest_prefix ) +#endif + import HsSyn -import RdrHsSyn ( RdrNameHsModule ) -import FastString ( unpackFS ) -import StringBuffer ( hGetStringBuffer ) -import Parser ( parse ) +import Id ( idName ) +import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) ) +import StringBuffer ( hGetStringBuffer, freeStringBuffer ) +import Parser import Lex ( PState(..), ParseResult(..) ) import SrcLoc ( mkSrcLoc ) - -import Rename ( renameModule ) - -import PrelInfo ( wiredInThings ) -import PrelRules ( builtinRules ) -import MkIface ( writeIface ) -import TcModule ( TcResults(..), typecheckModule ) -import Desugar ( deSugar ) -import SimplCore ( core2core ) -import OccurAnal ( occurAnalyseBinds ) +import Finder ( findModule ) +import Rename ( checkOldIface, renameModule, closeIfaceDecls ) +import Rules ( emptyRuleBase ) +import PrelInfo ( wiredInThingEnv, wiredInThings ) +import PrelNames ( knownKeyNames ) +import MkIface ( mkFinalIface ) +import TcModule +import InstEnv ( emptyInstEnv ) +import Desugar +import SimplCore import CoreUtils ( coreBindsSize ) import CoreTidy ( tidyCorePgm ) -import CoreToStg ( topCoreBindsToStg ) -import StgSyn ( collectFinalStgBinders ) +import CorePrep ( corePrepPgm ) +import StgSyn +import CoreToStg ( coreToStg ) import SimplStg ( stg2stg ) import CodeGen ( codeGen ) import CodeOutput ( codeOutput ) -import Module ( ModuleName, moduleNameUserString ) +import Module ( ModuleName, moduleName, mkHomeModule, + moduleUserString ) import CmdLineOpts -import ErrUtils ( ghcExit, doIfSet, dumpIfSet ) +import ErrUtils ( dumpIfSet_dyn, showPass, printError ) +import Util ( unJust ) import UniqSupply ( mkSplitUniqSupply ) +import Bag ( emptyBag ) import Outputable -import Char ( isSpace ) -import StgInterp ( runStgI ) +import Interpreter import HscStats ( ppSourceStats ) +import HscTypes +import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM ) +import OccName ( OccName ) +import Name ( Name, nameModule, nameOccName, getName, isGlobalName ) +import NameEnv ( emptyNameEnv, mkNameEnv ) +import Module ( Module ) + +import IOExts ( newIORef, readIORef, writeIORef, unsafePerformIO ) + +import Monad ( when ) +import Maybe ( isJust, fromJust, catMaybes ) +import IO + +import MkExternalCore ( emitExternalCore ) \end{code} @@ -55,371 +95,602 @@ import HscStats ( ppSourceStats ) \begin{code} data HscResult - = HscOK ModDetails -- new details (HomeSymbolTable additions) - (Maybe ModIface) -- new iface (if any compilation was done) - (Maybe String) -- generated stub_h filename (in /tmp) - (Maybe String) -- generated stub_c filename (in /tmp) - (Maybe [UnlinkedIBind]) -- interpreted code, if any - PersistentCompilerState -- updated PCS - (Bag WarnMsg) -- warnings - - | HscErrs PersistentCompilerState -- updated PCS - (Bag ErrMsg) -- errors - (Bag WarnMsg) -- warnings + -- compilation failed + = HscFail PersistentCompilerState -- updated PCS + -- concluded that it wasn't necessary + | HscNoRecomp PersistentCompilerState -- updated PCS + ModDetails -- new details (HomeSymbolTable additions) + ModIface -- new iface (if any compilation was done) + -- did recompilation + | HscRecomp PersistentCompilerState -- updated PCS + ModDetails -- new details (HomeSymbolTable additions) + ModIface -- new iface (if any compilation was done) + Bool -- stub_h exists + Bool -- stub_c exists +#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 hscMain - :: DynFlags - -> ModSummary -- summary, including source filename - -> Maybe ModIFace -- old interface, if available - -> String -- file in which to put the output (.s, .hc, .java etc.) + :: GhciMode + -> DynFlags + -> Module + -> ModuleLocation -- location info + -> Bool -- True <=> source unchanged + -> Bool -- True <=> have an object file (for msgs only) + -> Maybe ModIface -- old interface, if available -> HomeSymbolTable -- for home module ModDetails + -> HomeIfaceTable -> PersistentCompilerState -- IN: persistent compiler state -> IO HscResult -hscMain flags core_cmds stg_cmds summary maybe_old_iface - output_filename mod_details pcs1 = - - -------------------------- Reader ---------------- - show_pass "Parser" >> - _scc_ "Parser" +hscMain ghci_mode dflags mod location source_unchanged have_object + maybe_old_iface hst hit pcs + = 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 (ml_hi_file location) + source_unchanged maybe_old_iface; + + if errs_found then + return (HscFail pcs_ch) + else do { + + let no_old_iface = not (isJust maybe_checked_iface) + what_next | recomp_reqd || no_old_iface = hscRecomp + | otherwise = hscNoRecomp + ; + what_next ghci_mode dflags have_object mod location + maybe_checked_iface hst hit pcs_ch + }} + + +-- we definitely expect to have the old interface available +hscNoRecomp ghci_mode dflags have_object + mod location (Just old_iface) hst hit pcs_ch + | ghci_mode == OneShot + = do { + hPutStrLn stderr "compilation IS NOT required"; + let { bomb = panic "hscNoRecomp:OneShot" }; + return (HscNoRecomp pcs_ch bomb bomb) + } + | otherwise + = do { + when (verbosity dflags >= 1) $ + hPutStrLn stderr ("Skipping " ++ + compMsg have_object mod location); + + -- CLOSURE + (pcs_cl, closure_errs, cl_hs_decls) + <- closeIfaceDecls dflags hit hst pcs_ch old_iface ; + if closure_errs then + return (HscFail pcs_cl) + else do { + + -- TYPECHECK + maybe_tc_result + <- typecheckIface dflags pcs_cl hst old_iface cl_hs_decls; + + case maybe_tc_result of { + Nothing -> return (HscFail pcs_cl); + Just (pcs_tc, new_details) -> + + return (HscNoRecomp pcs_tc new_details old_iface) + }}} + +compMsg use_object mod location = + mod_str ++ take (max 0 (16 - length mod_str)) (repeat ' ') + ++" ( " ++ unJust "hscRecomp" (ml_hs_file location) ++ ", " + ++ (if use_object + then unJust "hscRecomp" (ml_obj_file location) + else "interpreted") + ++ " )" + where mod_str = moduleUserString mod + + +hscRecomp ghci_mode dflags have_object + mod location maybe_checked_iface hst hit pcs_ch + = do { + -- what target are we shooting for? + ; let toInterp = dopt_HscLang dflags == HscInterpreted + + ; when (verbosity dflags >= 1) $ + hPutStrLn stderr ("Compiling " ++ + compMsg (not toInterp) mod 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_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 + + ------------------- + -- TYPECHECK + ------------------- + ; maybe_tc_result + <- _scc_ "TypeCheck" typecheckModule dflags pcs_rn hst new_iface + print_unqualified rn_hs_decls + ; case maybe_tc_result of { + Nothing -> return (HscFail pcs_ch{-was: pcs_rn-}); + Just (pcs_tc, tc_result) -> do { + + ------------------- + -- DESUGAR + ------------------- + ; (ds_details, foreign_stuff) + <- _scc_ "DeSugar" + deSugar dflags pcs_tc hst this_mod print_unqualified tc_result + + ; 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 + + ------------------- + -- SIMPLIFY + ------------------- + ; simpl_details + <- _scc_ "Core2Core" + core2core dflags pcs_middle hst dont_discard ds_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 + ------------------- + -- 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 + + imported_module_names = map ideclName (hsModuleImports rdr_module) + + mod_name_to_Module nm + = do m <- findModule nm ; return (fst (fromJust m)) + + (h_code,c_code,fe_binders) = foreign_stuff + + ; imported_modules <- mapM mod_name_to_Module imported_module_names + + ; (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 - let src_filename -- name of the preprocessed source file - = case ms_ppsource summary of - Just (filename, fingerprint) -> filename - Nothing -> pprPanic "hscMain:summary is not of a source module" - (ppr summary) + -- Fill in the code-gen info + writeIORef cg_info_ref (Just emptyNameEnv) - buf <- hGetStringBuffer True{-expand tabs-} src_filename + ------------------ BUILD THE NEW ModIface ------------ + final_iface <- _scc_ "MkFinalIface" + mkFinalIface ghci_mode dflags location + maybe_checked_iface new_iface tidy_details - let glaexts | opt_GlasgowExts = 1# - | otherwise = 0# + return ( False, False, Just (bcos,itbl_env), final_iface ) +#else + then error "GHC not compiled with interpreter" +#endif - case parse buf PState{ bol = 0#, atbol = 1#, - context = [], glasgow_exts = glaexts, - loc = mkSrcLoc src_filename 1 } of { + 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 + + ------------------ 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) + + ; let final_details = tidy_details {md_binds = []} + + + -- and the answer is ... + ; return (HscRecomp pcs_final + final_details + final_iface + stub_h_exists stub_c_exists + maybe_bcos) + }}}}}}} + +myParseModule dflags src_filename + = do -------------------------- Parser ---------------- + showPass dflags "Parser" + _scc_ "Parser" do + + buf <- hGetStringBuffer True{-expand tabs-} src_filename + + let glaexts | dopt Opt_GlasgowExts dflags = 1# + | otherwise = 0# + + case parseModule buf PState{ bol = 0#, atbol = 1#, + context = [], glasgow_exts = glaexts, + loc = mkSrcLoc (_PK_ src_filename) 1 } of { + + PFailed err -> do { hPutStrLn stderr (showSDoc err); + freeStringBuffer buf; + return Nothing }; + + POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do { + + 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) + -- ToDo: free the string buffer later. + }} + + +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 + + stg_binds <- _scc_ "Core2Stg" coreToStg dflags tidy_binds + + (stg_binds2, cost_centre_info) + <- _scc_ "Core2Stg" stg2stg dflags this_mod stg_binds + + let env_rhs :: CgInfoEnv + env_rhs = mkNameEnv [ (idName bndr, CgInfo (stgRhsArity rhs) caf_info) + | (bind,_) <- stg_binds2, + let caf_info + | stgBindHasCafRefs bind = MayHaveCafRefs + | otherwise = NoCafRefs, + (bndr,rhs) <- stgBindPairs bind ] + + return (stg_binds2, cost_centre_info, env_rhs) + where + stgBindPairs (StgNonRec _ b r) = [(b,r)] + stgBindPairs (StgRec _ prs) = prs - PFailed err -> return (CompErrs pcs err) - POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> +\end{code} - dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >> - dumpIfSet (dopt_D_source_stats flags) "Source Statistics" - (ppSourceStats False rdr_module) >> +%************************************************************************ +%* * +\subsection{Compiling a do-statement} +%* * +%************************************************************************ - -- UniqueSupplies for later use (these are the only lower case uniques) - mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer - mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules - mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg - mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes - mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator +\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} - -------------------------- Rename ---------------- - show_pass "Renamer" >> - _scc_ "Renamer" +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. - renameModule rn_uniqs rdr_module >>= \ maybe_rn_stuff -> - case maybe_rn_stuff of { - Nothing -> -- Hurrah! Renamer reckons that there's no need to - -- go any further - reportCompile mod_name "Compilation NOT required!" >> - return (); - - Just (this_mod, rn_mod, - old_iface, new_iface, - rn_name_supply, fixity_env, - imported_modules) -> - -- Oh well, we've got to recompile for real +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,...] - -------------------------- Typechecking ---------------- - show_pass "TypeCheck" >> - _scc_ "TypeCheck" - typecheckModule dflags mod pcs hst hit pit rn_mod - -- tc_uniqs rn_name_supply - -- fixity_env rn_mod - >>= \ maybe_tc_stuff -> - case maybe_tc_stuff of { - Nothing -> ghcExit 1; -- Type checker failed + pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...] + bindings: [x,y,...] - Just (tc_results@(TcResults {tc_tycons = local_tycons, - tc_classes = local_classes, - tc_insts = inst_info })) -> + 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] - -------------------------- Desugaring ---------------- - _scc_ "DeSugar" - deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) -> + expr (of non-IO type, + 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 { (ExprStmt e _ _, decls) -> + typecheckExpr dflags pcs1 hst type_env + print_unqual iNTERACTIVE (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 - -------------------------- Main Core-language transformations ---------------- - _scc_ "Core2Core" - core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) -> + -- Tidy it (temporary, until coreSat does cloning) + ; tidy_expr <- tidyCoreExpr simpl_expr - -- Do the final tidy-up - tidyCorePgm this_mod - simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) -> + -- Prepare for codegen + ; prepd_expr <- corePrepExpr dflags tidy_expr - -- Run the occurrence analyser one last time, so that - -- dead binders get dead-binder info. This is exploited by - -- code generators to avoid spitting out redundant bindings. - -- The occurrence-zapping in Simplify.simplCaseBinder means - -- that the Simplifier nukes useful dead-var stuff especially - -- in case patterns. - let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in + -- Convert to BCOs + ; bcos <- coreExprToBCOs dflags prepd_expr - coreBindsSize occ_anal_tidy_binds `seq` --- TEMP: the above call zaps some space usage allocated by the --- simplifier, which for reasons I don't understand, persists --- thoroughout code generation + ; 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 (global_bound_ids, ty, bcos)) + }}}}} - -------------------------- Convert to STG code ------------------------------- - show_pass "Core2Stg" >> - _scc_ "Core2Stg" - let - stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds - in +hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt) +hscParseStmt dflags str + = do -------------------------- Parser ---------------- + showPass dflags "Parser" + _scc_ "Parser" do - -------------------------- Simplify STG code ------------------------------- - show_pass "Stg2Stg" >> - _scc_ "Stg2Stg" - stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) -> + buf <- stringToStringBuffer str -#ifdef GHCI - runStgI local_tycons local_classes - (map fst stg_binds2) >>= \ i_result -> - putStr ("\nANSWER = " ++ show i_result ++ "\n\n") - >> + let glaexts | dopt Opt_GlasgowExts dflags = 1# + | otherwise = 0# -#else - -------------------------- Interface file ------------------------------- - -- Dump instance decls and type signatures into the interface file - _scc_ "Interface" - let - final_ids = collectFinalStgBinders (map fst stg_binds2) - in - writeIface this_mod old_iface new_iface - local_tycons local_classes inst_info - final_ids occ_anal_tidy_binds tidy_orphan_rules >> - - - -------------------------- Code generation ------------------------------- - show_pass "CodeGen" >> - _scc_ "CodeGen" - codeGen this_mod imported_modules - cost_centre_info - fe_binders - local_tycons local_classes - stg_binds2 >>= \ abstractC -> - - - -------------------------- Code output ------------------------------- - show_pass "CodeOutput" >> - _scc_ "CodeOutput" - codeOutput this_mod local_tycons local_classes - occ_anal_tidy_binds stg_binds2 - c_code h_code abstractC - ncg_uniqs >> - - - -------------------------- Final report ------------------------------- - reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >> + case parseStmt buf PState{ bol = 0#, atbol = 1#, + context = [], glasgow_exts = glaexts, + loc = mkSrcLoc SLIT("") 0 } of { -#endif + PFailed err -> do { hPutStrLn stderr (showSDoc err); +-- Not yet implemented in <4.11 freeStringBuffer buf; + return Nothing }; + -- no stmt: the line consisted of just space or comments + POk _ Nothing -> return Nothing; - ghcExit 0 - } } - where - ------------------------------------------------------------- - -- ****** help functions: + POk _ (Just rdr_stmt) -> do { - show_pass - = if opt_D_show_passes - then \ what -> hPutStr stderr ("*** "++what++":\n") - else \ what -> return () + --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) + }} +#endif \end{code} - %************************************************************************ %* * -\subsection{Initial persistent state} +\subsection{Getting information about an identifer} %* * %************************************************************************ \begin{code} -initPersistentCompilerState :: PersistentCompilerState -initPersistentCompilerState - = PCS { pcs_PST = initPackageDetails, - pcs_insts = emptyInstEnv, - pcs_rules = initRules, - pcs_PRS = initPersistentRenamerState } - -initPackageDetails :: PackageSymbolTable -initPackageDetails = extendTypeEnv emptyModuleEnv wiredInThings - -initPersistentRenamerState :: PersistentRenamerState - = PRS { prsOrig = Orig { origNames = initOrigNames, - origIParam = emptyFM }, - prsDecls = emptyNameEnv, - prsInsts = emptyBag, - prsRules = emptyBag - } - -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 :: RuleEnv -initRules = foldl add emptyVarEnv builtinRules - where - add env (name,rule) = extendNameEnv_C add1 env name [rule] - add1 rules _ = rule : rules -\end{code} - - - -\begin{code} -writeIface this_mod old_iface new_iface - local_tycons local_classes inst_info - final_ids tidy_binds tidy_orphan_rules - = - if isNothing opt_HiDir && isNothing opt_HiFile - then return () -- not producing any .hi file - else - - let - hi_suf = case opt_HiSuf of { Nothing -> "hi"; Just suf -> suf } - filename = case opt_HiFile of { - Just f -> f; - Nothing -> - case opt_HiDir of { - Just dir -> dir ++ '/':moduleUserString this_mod - ++ '.':hi_suf; - Nothing -> panic "writeIface" - }} - in - - do maybe_final_iface <- checkIface old_iface full_new_iface - case maybe_final_iface of { - Nothing -> when opt_D_dump_rn_trace $ - putStrLn "Interface file unchanged" ; -- No need to update .hi file - - Just final_iface -> - - do let mod_vers_unchanged = case old_iface of - Just iface -> pi_vers iface == pi_vers final_iface - Nothing -> False - when (mod_vers_unchanged && opt_D_dump_rn_trace) $ - putStrLn "Module version unchanged, but usages differ; hence need new hi file" - - if_hdl <- openFile filename WriteMode - printForIface if_hdl (pprIface final_iface) - hClose if_hdl - } - where - full_new_iface = completeIface new_iface local_tycons local_classes - inst_info final_ids tidy_binds - tidy_orphan_rules +#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 icontext str + = do let + InteractiveContext { + ic_rn_env = rn_env, + ic_type_env = type_env, + ic_module = scope_mod } = icontext + + rdr_names + | '.' `elem` str + = [ mkQual ns (fmod,fvar) | ns <- namespaces var ] + | otherwise + = [ mkUnqual ns fstr | ns <- namespaces str ] + where (mod,var) = split_longest_prefix str '.' + fmod = mkFastString mod + fvar = mkFastString var + fstr = mkFastString str + namespaces s | isLower (head s) = [ varName ] + | otherwise = [ tcClsName, dataName ] + + (pcs, unqual, maybe_rn_result) <- + renameRdrName dflags hit hst pcs0 scope_mod scope_mod + rn_env 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 maybe_ty_things = map (lookupType hst (pcs_PTE pcs)) names + in + return (pcs, catMaybes maybe_ty_things) } + }} +#endif \end{code} - %************************************************************************ -%* * -\subsection{Printing the interface} -%* * +%* * +\subsection{Initial persistent state} +%* * %************************************************************************ \begin{code} -pprIface (ParsedIface { pi_mod = mod, pi_vers = mod_vers, pi_orphan = orphan, - pi_usages = usages, pi_exports = exports, - pi_fixity = (fix_vers, fixities), - pi_insts = insts, pi_decls = decls, - pi_rules = (rule_vers, rules), pi_deprecs = deprecs }) - = vcat [ ptext SLIT("__interface") - <+> doubleQuotes (ptext opt_InPackage) - <+> ppr mod <+> ppr mod_vers <+> pp_sub_vers - <+> (if orphan then char '!' else empty) - <+> int opt_HiVersion - <+> ptext SLIT("where") - , vcat (map pprExport exports) - , vcat (map pprUsage usages) - , pprFixities fixities - , vcat [ppr i <+> semi | i <- insts] - , vcat [ppr_vers v <+> ppr d <> semi | (v,d) <- decls] - , pprRules rules - , pprDeprecs deprecs - ] - where - ppr_vers v | v == initialVersion = empty - | otherwise = int v - pp_sub_vers - | fix_vers == initialVersion && rule_vers == initialVersion = empty - | otherwise = brackets (ppr fix_vers <+> ppr rule_vers) -\end{code} - -When printing export lists, we print like this: - Avail f f - AvailTC C [C, x, y] C(x,y) - AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C - -\begin{code} -pprExport :: ExportItem -> SDoc -pprExport (mod, items) - = hsep [ ptext SLIT("__export "), ppr mod, hsep (map upp_avail items) ] <> semi - where - upp_avail :: RdrAvailInfo -> SDoc - upp_avail (Avail name) = pprOccName name - upp_avail (AvailTC name []) = empty - upp_avail (AvailTC name ns) = hcat [pprOccName name, bang, upp_export ns'] - where - bang | name `elem` ns = empty - | otherwise = char '|' - ns' = filter (/= name) ns - - upp_export [] = empty - upp_export names = braces (hsep (map pprOccName names)) -\end{code} - - -\begin{code} -pprUsage :: ImportVersion OccName -> SDoc -pprUsage (m, has_orphans, is_boot, whats_imported) - = hsep [ptext SLIT("import"), pprModuleName m, - pp_orphan, pp_boot, - upp_import_versions whats_imported - ] <> semi - where - pp_orphan | has_orphans = char '!' - | otherwise = empty - pp_boot | is_boot = char '@' - | otherwise = empty - - -- Importing the whole module is indicated by an empty list - upp_import_versions NothingAtAll = empty - upp_import_versions (Everything v) = dcolon <+> int v - upp_import_versions (Specifically vm vf vr nvs) - = dcolon <+> int vm <+> int vf <+> int vr <+> hsep [ ppr n <+> int v | (n,v) <- nvs ] -\end{code} - - -\begin{code} -pprFixities [] = empty -pprFixities fixes = hsep (map ppr fixes) <> semi - -pprRules [] = empty -pprRules rules = hsep [ptext SLIT("{-## __R"), hsep (map ppr rules), ptext SLIT("##-}")] +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 + } + ) -pprDeprecs [] = empty -pprDeprecs deps = hsep [ ptext SLIT("{-## __D"), guts, ptext SLIT("##-}")] - where - guts = hsep [ ppr ie <+> doubleQuotes (ppr txt) <> semi - | Deprecation ie txt _ <- deps ] +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 \end{code} - -