%
-% (c) The GRASP/AQUA Project, Glasgow University, 1993-1998
+% (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 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 )
-#if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
-import SocketPrim
-import BSD
-import IOExts ( unsafePerformIO )
-import NativeInfo ( os, arch )
-#endif
-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}
+
+%************************************************************************
+%* *
+\subsection{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)
+ 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 pcs =
+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
- -------------------------- Reader ----------------
- show_pass "Parser" >>
- _scc_ "Parser"
+ -- 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
+
+ return ( False, False, Just (bcos,itbl_env), final_iface )
+#else
+ then error "GHC not compiled with interpreter"
+#endif
- let glaexts | opt_GlasgowExts = 1#
- | otherwise = 0#
+ 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
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
- PFailed err -> return (CompErrs pcs err);
+\end{code}
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
- dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
+%************************************************************************
+%* *
+\subsection{Compiling a do-statement}
+%* *
+%************************************************************************
- dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
- (ppSourceStats False rdr_module) >>
+\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}
- -- UniqueSupplies for later use (these are the only lower case uniques)
- mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
- mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
- mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
- mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
- mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
- mkSplitUniqSupply 'u' >>= \ tidy_uniqs -> -- tidy up
- mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
- mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
+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.
- -------------------------- Rename ----------------
- show_pass "Renamer" >>
- _scc_ "Renamer"
+A naked expression returns a singleton Name [it].
- 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
+ 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,...]
- -------------------------- Typechecking ----------------
- show_pass "TypeCheck" >>
- _scc_ "TypeCheck"
- typecheckModule tc_uniqs rn_name_supply
- fixity_env rn_mod >>= \ maybe_tc_stuff ->
- case maybe_tc_stuff of {
- Nothing -> ghcExit 1; -- Type checker failed
+ expr (of IO type) ==> expr >>= \ v -> return [v]
+ [NB: result not printed] bindings: [it]
+
- Just (tc_results@(TcResults {tc_tycons = local_tycons,
- tc_classes = local_classes,
- tc_insts = inst_info })) ->
+ 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
- -------------------------- Desugaring ----------------
- _scc_ "DeSugar"
- deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
+\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
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; tidy_expr <- tidyCoreExpr simpl_expr
- -------------------------- Main Core-language transformations ----------------
- _scc_ "Core2Core"
- core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
- -- Do the final tidy-up
- tidyCorePgm tidy_uniqs this_mod
- simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_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
+ ; 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
- 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
+ ; return (pcs2, Just (global_bound_ids, ty, bcos))
+ }}}}}
+hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
+hscParseStmt dflags str
+ = do -------------------------- Parser ----------------
+ showPass dflags "Parser"
+ _scc_ "Parser" do
- -------------------------- Convert to STG code -------------------------------
- show_pass "Core2Stg" >>
- _scc_ "Core2Stg"
- let
- stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
- in
+ buf <- stringToStringBuffer str
- -------------------------- Simplify STG code -------------------------------
- show_pass "Stg2Stg" >>
- _scc_ "Stg2Stg"
- stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
-#ifdef GHCI
- runStgI local_tycons local_classes
- (map fst stg_binds2) >>= \ i_result ->
- putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
- >>
+ case parseStmt buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<no file>") 0 } of {
-#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)) >>
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+-- Not yet implemented in <4.11 freeStringBuffer buf;
+ return Nothing };
-#endif
+ -- no stmt: the line consisted of just space or comments
+ POk _ Nothing -> return Nothing;
+ POk _ (Just rdr_stmt) -> do {
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
-
-ppSourceStats short (HsModule name version exports imports decls _ src_loc)
- = (if short then hcat else vcat)
- (map pp_val
- [("ExportAll ", export_all), -- 1 if no export list
- ("ExportDecls ", export_ds),
- ("ExportModules ", export_ms),
- ("Imports ", import_no),
- (" ImpQual ", import_qual),
- (" ImpAs ", import_as),
- (" ImpAll ", import_all),
- (" ImpPartial ", import_partial),
- (" ImpHiding ", import_hiding),
- ("FixityDecls ", fixity_ds),
- ("DefaultDecls ", default_ds),
- ("TypeDecls ", type_ds),
- ("DataDecls ", data_ds),
- ("NewTypeDecls ", newt_ds),
- ("DataConstrs ", data_constrs),
- ("DataDerivings ", data_derivs),
- ("ClassDecls ", class_ds),
- ("ClassMethods ", class_method_ds),
- ("DefaultMethods ", default_method_ds),
- ("InstDecls ", inst_ds),
- ("InstMethods ", inst_method_ds),
- ("TypeSigs ", bind_tys),
- ("ValBinds ", val_bind_ds),
- ("FunBinds ", fn_bind_ds),
- ("InlineMeths ", method_inlines),
- ("InlineBinds ", bind_inlines),
--- ("SpecialisedData ", data_specs),
--- ("SpecialisedInsts ", inst_specs),
- ("SpecialisedMeths ", method_specs),
- ("SpecialisedBinds ", bind_specs)
- ])
- where
- pp_val (str, 0) = empty
- pp_val (str, n)
- | not short = hcat [text str, int n]
- | otherwise = hcat [text (trim str), equals, int n, semi]
-
- trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
-
- fixity_ds = length [() | FixD d <- decls]
- -- NB: this omits fixity decls on local bindings and
- -- in class decls. ToDo
-
- tycl_decls = [d | TyClD d <- decls]
- (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
-
- inst_decls = [d | InstD d <- decls]
- inst_ds = length inst_decls
- default_ds = length [() | DefD _ <- decls]
- val_decls = [d | ValD d <- decls]
-
- real_exports = case exports of { Nothing -> []; Just es -> es }
- n_exports = length real_exports
- export_ms = length [() | IEModuleContents _ <- real_exports]
- export_ds = n_exports - export_ms
- export_all = case exports of { Nothing -> 1; other -> 0 }
-
- (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
- = count_binds (foldr ThenBinds EmptyBinds val_decls)
-
- (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
- = foldr add6 (0,0,0,0,0,0) (map import_info imports)
- (data_constrs, data_derivs)
- = foldr add2 (0,0) (map data_info tycl_decls)
- (class_method_ds, default_method_ds)
- = foldr add2 (0,0) (map class_info tycl_decls)
- (inst_method_ds, method_specs, method_inlines)
- = foldr add3 (0,0,0) (map inst_info inst_decls)
-
-
- count_binds EmptyBinds = (0,0,0,0,0)
- count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
- count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
- ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
-
- count_monobinds EmptyMonoBinds = (0,0)
- count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
- count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
- count_monobinds (PatMonoBind p r _) = (0,1)
- count_monobinds (FunMonoBind f _ m _) = (0,1)
-
- count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
-
- sig_info (Sig _ _ _) = (1,0,0,0)
- sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
- sig_info (SpecSig _ _ _) = (0,0,1,0)
- sig_info (InlineSig _ _ _) = (0,0,0,1)
- sig_info (NoInlineSig _ _ _) = (0,0,0,1)
- sig_info _ = (0,0,0,0)
-
- import_info (ImportDecl _ _ qual as spec _)
- = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
- qual_info False = 0
- qual_info True = 1
- as_info Nothing = 0
- as_info (Just _) = 1
- spec_info Nothing = (0,0,0,1,0,0)
- spec_info (Just (False, _)) = (0,0,0,0,1,0)
- spec_info (Just (True, _)) = (0,0,0,0,0,1)
-
- data_info (TyData _ _ _ _ _ nconstrs derivs _ _ _ _)
- = (nconstrs, case derivs of {Nothing -> 0; Just ds -> length ds})
- data_info other = (0,0)
-
- class_info (ClassDecl _ _ _ _ meth_sigs def_meths _ _ _ )
- = case count_sigs meth_sigs of
- (_,classops,_,_) ->
- (classops, addpr (count_monobinds def_meths))
- class_info other = (0,0)
-
- inst_info (InstDecl _ inst_meths inst_sigs _ _)
- = case count_sigs inst_sigs of
- (_,_,ss,is) ->
- (addpr (count_monobinds inst_meths), ss, is)
-
- addpr :: (Int,Int) -> Int
- add1 :: Int -> Int -> Int
- add2 :: (Int,Int) -> (Int,Int) -> (Int, Int)
- add3 :: (Int,Int,Int) -> (Int,Int,Int) -> (Int, Int, Int)
- add4 :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
- add5 :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
- add6 :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)
-
- addpr (x,y) = x+y
- add1 x1 y1 = x1+y1
- add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
- add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
- add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
- add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
- add6 (x1,x2,x3,x4,x5,x6) (y1,y2,y3,y4,y5,y6) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5,x6+y6)
+ --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}
-\begin{code}
-\end{code}
+%************************************************************************
+%* *
+\subsection{Getting information about an identifer}
+%* *
+%************************************************************************
\begin{code}
-reportCompile :: ModuleName -> String -> IO ()
-#if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
-reportCompile mod_name info
- | not opt_ReportCompile = return ()
- | otherwise = (do
- sock <- udpSocket 0
- addr <- motherShip
- sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
- ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
- return ()) `catch` (\ _ -> return ())
-
-motherShip :: IO SockAddr
-motherShip = do
- he <- getHostByName "laysan.dcs.gla.ac.uk"
- case (hostAddresses he) of
- [] -> IOERROR (userError "No address!")
- (x:_) -> return (SockAddrInet motherShipPort x)
-
---magick
-motherShipPort :: PortNumber
-motherShipPort = mkPortNumber 12345
-
--- creates a socket capable of sending datagrams,
--- binding it to a port
--- ( 0 => have the system pick next available port no.)
-udpSocket :: Int -> IO Socket
-udpSocket p = do
- pr <- getProtocolNumber "udp"
- s <- socket AF_INET Datagram pr
- bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
- return s
-#else
-reportCompile _ _ = return ()
+#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{Initial persistent state}
+%* *
+%************************************************************************
+
+\begin{code}
+initPersistentCompilerState :: IO PersistentCompilerState
+initPersistentCompilerState
+ = do prs <- initPersistentRenamerState
+ return (
+ PCS { pcs_PIT = emptyIfaceTable,
+ pcs_PTE = wiredInThingEnv,
+ pcs_insts = emptyInstEnv,
+ pcs_rules = emptyRuleBase,
+ pcs_PRS = prs
+ }
+ )
+
+initPersistentRenamerState :: IO PersistentRenamerState
+ = do us <- mkSplitUniqSupply 'r'
+ return (
+ PRS { prsOrig = NameSupply { nsUniqs = us,
+ nsNames = initOrigNames,
+ nsIPs = emptyFM },
+ prsDecls = (emptyNameEnv, 0),
+ prsInsts = (emptyBag, 0),
+ prsRules = (emptyBag, 0),
+ prsImpMods = emptyFM
+ }
+ )
+
+initOrigNames :: FiniteMap (ModuleName,OccName) Name
+initOrigNames
+ = grab knownKeyNames `plusFM` grab (map getName wiredInThings)
+ where
+ grab names = foldl add emptyFM names
+ add env name
+ = addToFM env (moduleName (nameModule name), nameOccName name) name
\end{code}