X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FHscMain.lhs;h=221712625f5209eaa22fc56ec440323352d40a1b;hb=423d477bfecd490de1449c59325c8776f91d7aac;hp=1fab4d2bae2be52cf38af62c4226deeaf98fa602;hpb=cf439717f2e81c92ce5a90891409c610082c6788;p=ghc-hetmet.git diff --git a/ghc/compiler/main/HscMain.lhs b/ghc/compiler/main/HscMain.lhs index 1fab4d2..7b1a102 100644 --- a/ghc/compiler/main/HscMain.lhs +++ b/ghc/compiler/main/HscMain.lhs @@ -1,574 +1,734 @@ % % (c) The GRASP/AQUA Project, Glasgow University, 1993-2000 % + \section[GHC_Main]{Main driver for Glasgow Haskell compiler} \begin{code} -module HscMain ( HscResult(..), hscMain, hscExpr, hscTypeExpr, - initPersistentCompilerState ) where +module HscMain ( + HscResult(..), hscMain, newHscEnv, hscCmmFile, hscBufferFrontEnd +#ifdef GHCI + , hscStmt, hscTcExpr, hscKcType, hscThing, + , compileExpr +#endif + ) where #include "HsVersions.h" #ifdef GHCI -import RdrHsSyn ( RdrNameHsExpr ) -import CoreToStg ( coreToStgExpr ) -import StringBuffer ( stringToStringBuffer, freeStringBuffer ) +import HsSyn ( Stmt(..), LStmt, LHsExpr, LHsType ) +import IfaceSyn ( IfaceDecl ) +import CodeOutput ( outputForeignStubs ) +import ByteCodeGen ( byteCodeGen, coreExprToBCOs ) +import Linker ( HValue, linkExpr ) +import TidyPgm ( tidyCoreExpr ) +import CorePrep ( corePrepExpr ) +import Flattening ( flattenExpr ) +import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnThing, tcRnType ) +import RdrName ( RdrName ) +import Type ( Type ) +import PrelNames ( iNTERACTIVE ) +import StringBuffer ( stringToStringBuffer ) +import SrcLoc ( SrcLoc, noSrcLoc, Located(..) ) +import Kind ( Kind ) +import Var ( Id ) +import CoreLint ( lintUnfolding ) +import DsMeta ( templateHaskellNames ) +import BasicTypes ( Fixity ) #endif -import HsSyn - import StringBuffer ( hGetStringBuffer ) import Parser -import Lex ( PState(..), ParseResult(..) ) +import Lexer ( P(..), ParseResult(..), mkPState ) import SrcLoc ( mkSrcLoc ) -import Rename -import Rules ( emptyRuleBase ) -import PrelInfo ( wiredInThingEnv, wiredInThings ) -import PrelNames ( knownKeyNames ) -import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails, - writeIface, pprIface ) -import TcModule -import Type -import TcHsSyn -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 OccurAnal ( occurAnalyseBinds ) -import CoreUtils ( coreBindsSize ) -import CoreTidy ( tidyCorePgm ) -import CoreToStg ( topCoreBindsToStg ) -import StgSyn ( collectFinalStgBinders ) +import TidyPgm ( tidyCorePgm ) +import CorePrep ( corePrepPgm ) +import CoreToStg ( coreToStg ) +import Name ( Name, NamedThing(..) ) import SimplStg ( stg2stg ) import CodeGen ( codeGen ) +import CmmParse ( parseCmmFile ) import CodeOutput ( codeOutput ) -import Module ( ModuleName, moduleName, mkHomeModule ) import CmdLineOpts -import ErrUtils ( dumpIfSet_dyn, showPass ) -import Util ( unJust ) -import Unique ( Uniquable(..) ) -import PrelNames ( ioTyConKey ) +import DriverPhases ( isExtCoreFilename ) +import ErrUtils import UniqSupply ( mkSplitUniqSupply ) -import Bag ( emptyBag ) import Outputable -import Interpreter -import CmStaticInfo ( GhciMode(..) ) import HscStats ( ppSourceStats ) -import HscTypes ( ModDetails, ModIface(..), PersistentCompilerState(..), - PersistentRenamerState(..), ModuleLocation(..), - HomeSymbolTable, - OrigNameEnv(..), PackageRuleBase, HomeIfaceTable, - typeEnvClasses, typeEnvTyCons, emptyIfaceTable ) -import Type ( splitTyConApp_maybe ) -import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM ) -import OccName ( OccName ) -import Name ( Name, nameModule, nameOccName, getName ) -import Name ( emptyNameEnv ) -import Module ( Module, lookupModuleEnvByName ) +import HscTypes +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 ) -import IO ( hPutStrLn, stderr ) +import Maybe ( isJust, fromJust ) +import IO +import DATA_IOREF ( newIORef, readIORef ) +\end{code} + + +%************************************************************************ +%* * + 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) - (Maybe String) -- generated stub_h filename (in /tmp) - (Maybe String) -- generated stub_c filename (in /tmp) - (Maybe ([UnlinkedIBind],ItblEnv)) -- interpreted code, if any - + + -- 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 + (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 - -> Bool -- source unchanged? - -> ModuleLocation -- location info + :: HscEnv + -> MessageAction -- what to do with errors/warnings + -> Module + -> 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 source_unchanged location maybe_old_iface hst hit pcs +hscMain hsc_env msg_act mod location + source_unchanged have_object maybe_old_iface = 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 dflags hit hst pcs - (unJust "hscMain" (ml_hi_file location)) - source_unchanged maybe_old_iface; - - if errs_found then - return (HscFail pcs_ch) - else do { + (recomp_reqd, maybe_checked_iface) <- + _scc_ "checkOldIface" + checkOldIface hsc_env mod + (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 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 location (Just old_iface) hst hit pcs_ch - | ghci_mode == OneShot - = let bomb = panic "hscNoRecomp:OneShot" - in return (HscNoRecomp pcs_ch bomb bomb) + +-- 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 (hsc_dflags hsc_env) > 0) $ + hPutStrLn stderr "compilation IS NOT required"; + dumpIfaceStats hsc_env ; + + let { bomb = panic "hscNoRecomp:OneShot" }; + return (HscNoRecomp bomb bomb) + } | otherwise = do { - hPutStrLn stderr "compilation IS NOT required"; - - -- 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 <- typecheckModule dflags pcs_cl hst - old_iface alwaysQualify cl_hs_decls; - case maybe_tc_result of { - Nothing -> return (HscFail pcs_cl); - Just (pcs_tc, tc_result) -> do { - - let env_tc = tc_env tc_result - local_insts = tc_insts 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_insts local_rules - ; - return (HscNoRecomp pcs_tc new_details old_iface) - }}}} - - -hscRecomp ghci_mode dflags location maybe_checked_iface hst hit pcs_ch - = do { - ; when (verbosity dflags >= 1) $ - hPutStrLn stderr "compilation IS required"; + when (verbosity (hsc_dflags hsc_env) >= 1) $ + hPutStrLn stderr ("Skipping " ++ + showModMsg have_object mod location); + new_details <- _scc_ "tcRnIface" + typecheckIface hsc_env old_iface ; + dumpIfaceStats hsc_env ; + + return (HscNoRecomp new_details old_iface) + } + +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 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 (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 + + ; case front_res of + Left flure -> return flure; + Right ds_result -> do { + + + -- OMITTED: + -- ; seqList imported_modules (return ()) ------------------- - -- PARSE + -- FLATTENING ------------------- - ; 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) - + ; flat_result <- _scc_ "Flattening" + flatten hsc_env ds_result + + +{- TEMP: need to review space-leak fixing here + NB: even the code generator can force one of the + thunks for constructor arguments, for newtypes in particular + + ; let -- Rule-base accumulated from imported packages + pkg_rule_base = eps_rule_base (hsc_EPS hsc_env) + + -- In one-shot mode, ZAP the external package state at + -- this point, because we aren't going to need it from + -- now on. We keep the name cache, however, because + -- tidyCore needs it. + pcs_middle + | one_shot = pcs_tc{ pcs_EPS = error "pcs_EPS missing" } + | otherwise = pcs_tc + + ; pkg_rule_base `seq` pcs_middle `seq` return () +-} + + -- alive at this point: + -- pcs_middle + -- flat_result + -- pkg_rule_base + ------------------- - -- RENAME + -- SIMPLIFY ------------------- - ; showPass dflags "Rename" - ; (pcs_rn, maybe_rn_result) - <- renameModule 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 { - + ; simpl_result <- _scc_ "Core2Core" + core2core hsc_env flat_result + ------------------- - -- TYPECHECK + -- TIDY ------------------- - ; showPass dflags "Typecheck" - ; maybe_tc_result <- typecheckModule dflags pcs_rn hst new_iface - print_unqualified rn_hs_decls - ; case maybe_tc_result of { - Nothing -> return (HscFail pcs_rn); - Just (pcs_tc, tc_result) -> do { - - ; let env_tc = tc_env tc_result - local_insts = tc_insts tc_result + ; tidy_result <- _scc_ "CoreTidy" + tidyCorePgm hsc_env simpl_result + + -- Emit external core + ; emitExternalCore dflags tidy_result + + -- Alive at this point: + -- tidy_result, pcs_final + -- hsc_env ------------------- - -- DESUGAR, SIMPLIFY, TIDY-CORE + -- 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 } + ------------------- - -- We grab the the unfoldings at this point. - ; simpl_result <- dsThenSimplThenTidy dflags pcs_tc hst this_mod - print_unqualified is_exported tc_result - ; let (tidy_binds, orphan_rules, foreign_stuff) = simpl_result - + -- CONVERT TO STG and COMPLETE CODE GENERATION + ; (stub_h_exists, stub_c_exists, maybe_bcos) + <- hscBackEnd dflags tidy_result + + -- And the answer is ... + ; dumpIfaceStats hsc_env + + ; return (HscRecomp final_details + final_globals + final_iface + stub_h_exists stub_c_exists + maybe_bcos) + }} + +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 { + ------------------- - -- CONVERT TO STG + -- RENAME and TYPECHECK ------------------- - ; (stg_binds, oa_tidy_binds, cost_centre_info, top_level_ids) - <- myCoreToStg dflags this_mod tidy_binds + ; (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! + }}} + +hscFileFrontEnd hsc_env msg_act location = do { + ------------------- + -- PARSE + ------------------- + ; maybe_parsed <- myParseModule (hsc_dflags hsc_env) + (expectJust "hscFrontEnd:hspp" (ml_hspp_file location)) + ; 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 lazily, 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 + + + +hscFrontEnd hsc_env msg_act rdr_module = do { ------------------- - -- BUILD THE NEW ModDetails AND ModIface + -- RENAME and TYPECHECK ------------------- - ; let new_details = mkModDetails env_tc local_insts tidy_binds - top_level_ids orphan_rules - ; final_iface <- mkFinalIface ghci_mode dflags location - maybe_checked_iface new_iface new_details + ; (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 { ------------------- - -- COMPLETE CODE GENERATION + -- 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 { + ------------------- - ; (maybe_stub_h_filename, maybe_stub_c_filename, maybe_ibinds) - <- restOfCodeGeneration dflags toInterp this_mod - (map ideclName (hsModuleImports rdr_module)) - cost_centre_info foreign_stuff env_tc stg_binds oa_tidy_binds - hit (pcs_PIT pcs_tc) - - -- and the answer is ... - ; return (HscRecomp pcs_tc new_details final_iface - maybe_stub_h_filename maybe_stub_c_filename - maybe_ibinds) - }}}}}}} - - - -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 + -- PREPARE FOR CODE GENERATION + -- Do saturation and convert to A-normal form + prepd_binds <- _scc_ "CorePrep" + corePrepPgm dflags core_binds type_env; + + case dopt_HscLang dflags of + HscNothing -> return (False, False, Nothing) + + 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 + panic "GHC not compiled with interpreter" +#endif + + 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) + } + + +hscCmmFile :: DynFlags -> FilePath -> IO Bool +hscCmmFile dflags filename = do + maybe_cmm <- parseCmmFile dflags filename + case maybe_cmm of + Nothing -> return False + Just cmm -> do + codeOutput dflags no_mod NoStubs noDependencies [cmm] + return True + where + no_mod = panic "hscCmmFile: no_mod" myParseModule dflags src_filename = do -------------------------- Parser ---------------- showPass dflags "Parser" - -- _scc_ "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 parse 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); - return Nothing }; - - POk _ (PModule 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. }} -restOfCodeGeneration dflags toInterp this_mod imported_module_names cost_centre_info - foreign_stuff env_tc stg_binds oa_tidy_binds - hit pit -- these last two for mapping ModNames to Modules - | toInterp - = do (ibinds,itbl_env) - <- stgBindsToInterpSyn dflags (map fst stg_binds) - local_tycons local_classes - return (Nothing, Nothing, Just (ibinds,itbl_env)) - - | otherwise - = do -------------------------- Code generation ------------------------------- - -- _scc_ "CodeGen" - abstractC <- codeGen dflags this_mod imported_modules - cost_centre_info fe_binders - local_tycons stg_binds - - -------------------------- Code output ------------------------------- - -- _scc_ "CodeOutput" - (maybe_stub_h_name, maybe_stub_c_name) - <- codeOutput dflags this_mod local_tycons - oa_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 - (fe_binders,h_code,c_code) = 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) - - -dsThenSimplThenTidy dflags pcs hst this_mod print_unqual is_exported tc_result - = do -------------------------- Desugaring ---------------- - showPass dflags "DeSugar" - -- _scc_ "DeSugar" - (desugared, rules, h_code, c_code, fe_binders) - <- deSugar dflags pcs hst this_mod print_unqual tc_result - - -------------------------- Main Core-language transformations ---------------- - -- _scc_ "Core2Core" - (simplified, orphan_rules) - <- core2core dflags pcs hst is_exported desugared rules - - -- Do the final tidy-up - showPass dflags "TidyCore" - (tidy_binds, tidy_orphan_rules) - <- tidyCorePgm dflags this_mod simplified orphan_rules - - return (tidy_binds, tidy_orphan_rules, (fe_binders,h_code,c_code)) - - -myCoreToStg dflags this_mod tidy_binds +myCoreToStg dflags this_mod prepd_binds = do - st_uniqs <- mkSplitUniqSupply 'g' - let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds - - () <- coreBindsSize occ_anal_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 prepd_binds - -- _scc_ "Core2Stg" - stg_binds <- topCoreBindsToStg dflags occ_anal_tidy_binds + (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg" + stg2stg dflags this_mod stg_binds - showPass dflags "Stg2Stg" - -- _scc_ "Stg2Stg" - (stg_binds2, cost_centre_info) <- stg2stg dflags this_mod st_uniqs stg_binds - let final_ids = collectFinalStgBinders (map fst stg_binds2) - - return (stg_binds2, occ_anal_tidy_binds, cost_centre_info, final_ids) + return (stg_binds2, cost_centre_info) \end{code} %************************************************************************ %* * -\subsection{Compiling an expression} +\subsection{Compiling a do-statement} %* * %************************************************************************ -\begin{code} -hscExpr - :: DynFlags - -> HomeSymbolTable - -> HomeIfaceTable - -> PersistentCompilerState -- IN: persistent compiler state - -> Module -- Context for compiling - -> String -- The expression - -> IO ( PersistentCompilerState, Maybe UnlinkedIExpr ) +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. -#ifndef GHCI -hscExpr dflags hst hit pcs this_module expr - = panic "hscExpr: non-interactive build" -#else +A naked expression returns a singleton Name [it]. -hscExpr dflags hst hit pcs0 this_module expr - = do { - -- parse, rename & typecheck the expression - (pcs1, maybe_tc_result) - <- hscExprFrontEnd dflags hst hit pcs0 this_module expr; + 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,...] - case maybe_tc_result of { - Nothing -> return (pcs1, Nothing); - Just (print_unqual, tc_expr, ty) -> do { - - -- if it isn't an IO-typed expression, - -- wrap "print" around it & recompile... - let { is_IO_type = case splitTyConApp_maybe ty of { - Just (tycon, _) -> getUnique tycon == ioTyConKey; - Nothing -> False } - }; - - if (not is_IO_type) - then hscExpr dflags hst hit pcs1 this_module - ("print (" ++ expr ++ ")") - else do - - -- Desugar it - ds_expr <- deSugarExpr dflags pcs1 hst this_module - print_unqual tc_expr; - - -- Simplify it - simpl_expr <- simplifyExpr dflags pcs1 hst ds_expr; + pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...] + bindings: [x,y,...] - -- Convert to STG - stg_expr <- coreToStgExpr dflags simpl_expr; + expr (of IO type) ==> expr >>= \ v -> return [v] + [NB: result not printed] bindings: [it] + - -- ToDo: need to do StgVarInfo? or SRTs? + expr (of non-IO type, + result showable) ==> let v = expr in print v >> return [v] + bindings: [it] - -- Convert to InterpSyn - unlinked_iexpr <- stgExprToInterpSyn dflags stg_expr; + expr (of non-IO type, + result not showable) ==> error - return (pcs1, Just unlinked_iexpr); - }}} +\begin{code} +#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)) + +hscStmt hsc_env icontext stmt + = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) stmt + ; case maybe_stmt of { + Nothing -> return Nothing ; -- Parse error + Just Nothing -> return Nothing ; -- Empty line + Just (Just parsed_stmt) -> do { -- The real stuff + + -- Rename and typecheck it + maybe_tc_result + <- tcRnStmt hsc_env icontext parsed_stmt -hscExprFrontEnd - :: DynFlags - -> HomeSymbolTable - -> HomeIfaceTable - -> PersistentCompilerState -- IN: persistent compiler state - -> Module -- Context for compiling - -> String -- The expression - -> IO ( PersistentCompilerState, - Maybe (PrintUnqualified,TypecheckedHsExpr,Type) - ) -hscExprFrontEnd dflags hst hit pcs0 this_module expr - = do { -- Parse it - maybe_parsed <- hscParseExpr dflags expr; - case maybe_parsed of - Nothing -> return (pcs0, Nothing) - Just parsed_expr -> do { - - -- Rename it - (pcs1, maybe_renamed_expr) <- - renameExpr dflags hit hst pcs0 this_module parsed_expr; - case maybe_renamed_expr of - Nothing -> return (pcs1, Nothing) - Just (print_unqual, rn_expr) -> do { - - -- Typecheck it - maybe_tc_return - <- typecheckExpr dflags pcs1 hst print_unqual this_module rn_expr; - case maybe_tc_return of - Nothing -> return (pcs1, Nothing) - Just (pcs2, tc_expr, ty) -> - return (pcs2, Just (print_unqual, tc_expr, ty)) - }}} - -hscTypeExpr - :: DynFlags - -> HomeSymbolTable - -> HomeIfaceTable - -> PersistentCompilerState -- IN: persistent compiler state - -> Module -- Context for compiling + ; case maybe_tc_result of { + Nothing -> return Nothing ; + Just (new_ic, bound_names, tc_expr) -> do { + + -- Then desugar, code gen, and link it + ; hval <- compileExpr hsc_env iNTERACTIVE + (ic_rn_gbl_env new_ic) + (ic_type_env new_ic) + tc_expr + + ; return (Just (new_ic, bound_names, hval)) + }}}}} + +hscTcExpr -- Typecheck an expression (but don't run it) + :: HscEnv + -> InteractiveContext -- Context for compiling -> String -- The expression - -> IO (PersistentCompilerState, Maybe Type) -hscTypeExpr dflags hst hit pcs0 this_module expr - = do (pcs1, maybe_tc_result) - <- hscExprFrontEnd dflags hst hit pcs0 this_module expr - case maybe_tc_result of - Nothing -> return (pcs1, Nothing) - Just (_,_,ty) -> return (pcs1, Just ty) - -hscParseExpr :: DynFlags -> String -> IO (Maybe RdrNameHsExpr) -hscParseExpr dflags str - = do -------------------------- Parser ---------------- - showPass dflags "Parser" - -- _scc_ "Parser" + -> IO (Maybe Type) + +hscTcExpr hsc_env icontext expr + = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) expr + ; case maybe_stmt of { + Nothing -> return Nothing ; -- Parse error + Just (Just (L _ (ExprStmt expr _))) + -> tcRnExpr hsc_env icontext expr ; + Just other -> do { hPutStrLn stderr ("not an expression: `" ++ expr ++ "'") ; + return Nothing } ; + } } + +hscKcType -- Find the kind of a type + :: HscEnv + -> InteractiveContext -- Context for compiling + -> String -- The type + -> IO (Maybe Kind) + +hscKcType hsc_env icontext str + = do { maybe_type <- hscParseType (hsc_dflags hsc_env) str + ; case maybe_type of { + Just ty -> tcRnType hsc_env icontext ty ; + Just other -> do { hPutStrLn stderr ("not an type: `" ++ str ++ "'") ; + return Nothing } ; + Nothing -> return Nothing } } +\end{code} + +\begin{code} +hscParseStmt :: DynFlags -> String -> IO (Maybe (Maybe (LStmt RdrName))) +hscParseStmt = hscParseThing parseStmt + +hscParseType :: DynFlags -> String -> IO (Maybe (LHsType RdrName)) +hscParseType = hscParseThing parseType + +hscParseIdentifier :: DynFlags -> String -> IO (Maybe (Located RdrName)) +hscParseIdentifier = hscParseThing parseIdentifier + +hscParseThing :: Outputable thing + => Lexer.P thing + -> DynFlags -> String + -> IO (Maybe thing) + -- Nothing => Parse error (message already printed) + -- Just x => success +hscParseThing parser dflags str + = do showPass dflags "Parser" + _scc_ "Parser" do - buf <- stringToStringBuffer ("__expr " ++ str) + buf <- stringToStringBuffer str - -- glaexts is True for now (because of the daft __expr at the front - -- of the string...) - let glaexts = 1# - --let glaexts | dopt Opt_GlasgowExts dflags = 1# - -- | otherwise = 0# + let loc = mkSrcLoc FSLIT("") 1 0 - case parse buf PState{ bol = 0#, atbol = 1#, - context = [], glasgow_exts = glaexts, - loc = mkSrcLoc SLIT("") 0 } of { + case unP parser (mkPState buf loc dflags) of { - PFailed err -> do { freeStringBuffer buf; - hPutStrLn stderr (showSDoc err); - return Nothing }; + PFailed span err -> do { printError span err; + return Nothing }; - POk _ (PExpr rdr_expr) -> do { + POk _ thing -> do { --ToDo: can't free the string buffer until we've finished this -- compilation sweep and all the identifiers have gone away. - --freeStringBuffer buf; - dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_expr); - return (Just rdr_expr) + dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr thing); + return (Just thing) }} #endif \end{code} %************************************************************************ %* * -\subsection{Initial persistent state} +\subsection{Getting information about an identifer} %* * %************************************************************************ \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 ns <- mkSplitUniqSupply 'r' - return ( - PRS { prsOrig = Orig { origNames = initOrigNames, - origIParam = emptyFM }, - prsDecls = (emptyNameEnv, 0), - prsInsts = (emptyBag, 0), - prsRules = (emptyBag, 0), - prsNS = ns - } - ) - -initOrigNames :: FiniteMap (ModuleName,OccName) Name -initOrigNames - = grab knownKeyNames `plusFM` grab (map getName wiredInThings) - where - grab names = foldl add emptyFM names - add env name - = addToFM env (moduleName (nameModule name), nameOccName name) name - - -initRules :: PackageRuleBase -initRules = emptyRuleBase -{- SHOULD BE (ish) - foldl add emptyVarEnv builtinRules - where - add env (name,rule) - = extendRuleBase env name rule --} +#ifdef GHCI +hscThing -- like hscStmt, but deals with a single identifier + :: HscEnv + -> InteractiveContext -- Context for compiling + -> String -- The identifier + -> IO [(IfaceDecl, Fixity, SrcLoc)] + +hscThing hsc_env ic str + = do maybe_rdr_name <- hscParseIdentifier (hsc_dflags hsc_env) str + case maybe_rdr_name of { + 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 + }} +#endif +\end{code} + +%************************************************************************ +%* * + Desugar, simplify, convert to bytecode, and link an expression +%* * +%************************************************************************ + +\begin{code} +#ifdef GHCI +compileExpr :: HscEnv + -> Module -> GlobalRdrEnv -> TypeEnv + -> LHsExpr Id + -> IO HValue + +compileExpr hsc_env this_mod rdr_env type_env tc_expr + = do { let { dflags = hsc_dflags hsc_env ; + lint_on = dopt Opt_DoCoreLinting dflags } + + -- Desugar it + ; ds_expr <- deSugarExpr hsc_env this_mod rdr_env type_env tc_expr + + -- Flatten it + ; flat_expr <- flattenExpr hsc_env ds_expr + + -- Simplify it + ; simpl_expr <- simplifyExpr dflags flat_expr + + -- Tidy it (temporary, until coreSat does cloning) + ; 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} + + +%************************************************************************ +%* * + Statistics on reading interfaces +%* * +%************************************************************************ + +\begin{code} +dumpIfaceStats :: HscEnv -> IO () +dumpIfaceStats hsc_env + = do { eps <- readIORef (hsc_EPS hsc_env) + ; dumpIfSet (dump_if_trace || dump_rn_stats) + "Interface statistics" + (ifaceStats eps) } + where + dflags = hsc_dflags hsc_env + dump_rn_stats = dopt Opt_D_dump_rn_stats dflags + dump_if_trace = dopt Opt_D_dump_if_trace dflags \end{code}