%
% (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 Interpreter
+import ByteCodeGen ( byteCodeGen )
+import CoreTidy ( tidyCoreExpr )
+import CorePrep ( corePrepExpr )
+import Rename ( renameStmt, renameRdrName )
+import RdrName ( rdrNameOcc, setRdrNameOcc )
+import RdrHsSyn ( RdrNameStmt )
+import OccName ( dataName, tcClsName,
+ occNameSpace, setOccNameSpace )
+import Type ( Type )
+import Id ( Id, idName, setGlobalIdDetails )
+import IdInfo ( GlobalIdDetails(VanillaGlobal) )
+import HscTypes ( InteractiveContext(..) )
+import PrelNames ( iNTERACTIVE )
+import StringBuffer ( stringToStringBuffer )
+import FastString ( mkFastString )
+import Maybes ( catMaybes )
+#endif
+
import HsSyn
-import RdrHsSyn ( RdrNameHsModule )
-import FastString ( unpackFS )
-import StringBuffer ( hGetStringBuffer )
-import Parser ( parse )
+import RdrName ( mkRdrOrig )
+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 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 PrelRules ( builtinRules )
+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 ( consBag, emptyBag )
import Outputable
-import Char ( isSpace )
-import StgInterp ( runStgI )
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 )
+import IO
+
+import MkExternalCore ( emitExternalCore )
\end{code}
\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 =
+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 {
+ when (verbosity dflags > 0) $
+ 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 ++ replicate (max 0 (16 - length mod_str)) ' '
+ ++" ( " ++ 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
+ ; let toNothing = dopt_HscLang dflags == HscNothing
+
+ ; when (ghci_mode /= OneShot && 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)
- 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)
+ ------------------ BUILD THE NEW ModIface ------------
+ final_iface <- _scc_ "MkFinalIface"
+ mkFinalIface ghci_mode dflags location
+ maybe_checked_iface new_iface tidy_details
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
+ 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
+
+ if toNothing
+ then do
+ return (False, False, Nothing, final_iface)
+ else do
+ ------------------ Code generation ------------------
+ abstractC <- _scc_ "CodeGen"
+ codeGen dflags this_mod imported_modules
+ cost_centre_info fe_binders
+ local_tycons stg_binds
+
+ ------------------ Code output -----------------------
+ (stub_h_exists, stub_c_exists)
+ <- codeOutput dflags this_mod local_tycons
+ binds stg_binds
+ c_code h_code abstractC
+
+ return (stub_h_exists, stub_c_exists, Nothing, final_iface)
+
+ ; 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 caf_info)
+ | (bind,_) <- stg_binds2,
+ let caf_info
+ | stgBindHasCafRefs bind = MayHaveCafRefs
+ | otherwise = NoCafRefs,
+ bndr <- stgBinders bind ]
+
+ return (stg_binds2, cost_centre_info, env_rhs)
+\end{code}
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
- PFailed err -> return (CompErrs pcs err)
+%************************************************************************
+%* *
+\subsection{Compiling a do-statement}
+%* *
+%************************************************************************
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
+\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}
- dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
+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.
- dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
- (ppSourceStats False rdr_module) >>
+A naked expression returns a singleton Name [it].
- -- 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 'u' >>= \ tidy_uniqs -> -- tidy up
- mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
- mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
+ 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,...]
- -------------------------- Rename ----------------
- show_pass "Renamer" >>
- _scc_ "Renamer"
+ pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
- 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
+ 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]
- -------------------------- 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 non-IO type,
+ result not showable) ==> error
- Just (tc_results@(TcResults {tc_tycons = local_tycons,
- tc_classes = local_classes,
- tc_insts = inst_info })) ->
+\begin{code}
+hscStmt dflags hst hit pcs0 icontext stmt just_expr
+ = do { maybe_stmt <- hscParseStmt dflags stmt
+ ; case maybe_stmt of
+ Nothing -> return (pcs0, Nothing)
+ Just parsed_stmt -> do {
+
+ let { notExprStmt (ExprStmt _ _ _) = False;
+ notExprStmt _ = True
+ };
+
+ if (just_expr && notExprStmt parsed_stmt)
+ then do hPutStrLn stderr ("not an expression: `" ++ stmt ++ "'")
+ return (pcs0, Nothing)
+ else do {
+
+ -- Rename it
+ (pcs1, print_unqual, maybe_renamed_stmt)
+ <- renameStmt dflags hit hst pcs0
+ iNTERACTIVE icontext parsed_stmt
+
+ ; case maybe_renamed_stmt of
+ Nothing -> return (pcs0, Nothing)
+ Just (bound_names, rn_stmt) -> do {
+
+ -- Typecheck it
+ maybe_tc_return <-
+ if just_expr
+ then case rn_stmt of { (ExprStmt e _ _, decls) ->
+ typecheckExpr dflags pcs1 hst (ic_type_env icontext)
+ print_unqual iNTERACTIVE (e,decls) }
+ else typecheckStmt dflags pcs1 hst (ic_type_env icontext)
+ print_unqual iNTERACTIVE bound_names rn_stmt
+
+ ; case maybe_tc_return of
+ Nothing -> return (pcs0, Nothing)
+ Just (pcs2, tc_expr, bound_ids, ty) -> do {
+
+ -- Desugar it
+ ds_expr <- deSugarExpr dflags pcs2 hst iNTERACTIVE print_unqual tc_expr
+
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags pcs2 hst ds_expr
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; tidy_expr <- tidyCoreExpr simpl_expr
- -------------------------- Desugaring ----------------
- _scc_ "DeSugar"
- deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
- -------------------------- Main Core-language transformations ----------------
- _scc_ "Core2Core"
- core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
+ ; 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
- -- Do the final tidy-up
- tidyCorePgm tidy_uniqs this_mod
- simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
+ ; return (pcs2, Just (global_bound_ids, ty, bcos))
- -- 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
+ }}}}}
- 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
+hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
+hscParseStmt dflags str
+ = do -------------------------- Parser ----------------
+ showPass dflags "Parser"
+ _scc_ "Parser" do
+ buf <- stringToStringBuffer str
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
- -------------------------- Convert to STG code -------------------------------
- show_pass "Core2Stg" >>
- _scc_ "Core2Stg"
- let
- stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
- in
+ case parseStmt buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<interactive>") 1 } of {
- -------------------------- Simplify STG code -------------------------------
- show_pass "Stg2Stg" >>
- _scc_ "Stg2Stg"
- stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+-- Not yet implemented in <4.11 freeStringBuffer buf;
+ return Nothing };
-#ifdef GHCI
- runStgI local_tycons local_classes
- (map fst stg_binds2) >>= \ i_result ->
- putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
- >>
+ -- no stmt: the line consisted of just space or comments
+ POk _ Nothing -> return Nothing;
-#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)) >>
+ POk _ (Just rdr_stmt) -> do {
+ --ToDo: can't free the string buffer until we've finished this
+ -- compilation sweep and all the identifiers have gone away.
+ --freeStringBuffer buf;
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_stmt);
+ return (Just rdr_stmt)
+ }}
#endif
+\end{code}
+%************************************************************************
+%* *
+\subsection{Getting information about an identifer}
+%* *
+%************************************************************************
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
+\begin{code}
+#ifdef GHCI
+hscThing -- like hscStmt, but deals with a single identifier
+ :: DynFlags
+ -> HomeSymbolTable
+ -> HomeIfaceTable
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> InteractiveContext -- Context for compiling
+ -> String -- The identifier
+ -> IO ( PersistentCompilerState,
+ [TyThing] )
+
+hscThing dflags hst hit pcs0 icontext str
+ = do maybe_rdr_name <- myParseIdentifier dflags str
+ case maybe_rdr_name of {
+ Nothing -> return (pcs0, []);
+ Just rdr_name -> do
+
+ -- if the identifier is a constructor (begins with an
+ -- upper-case letter), then we need to consider both
+ -- constructor and type class identifiers.
+ let rdr_names
+ | occNameSpace occ == dataName = [ rdr_name, tccls_name ]
+ | otherwise = [ rdr_name ]
+ where
+ occ = rdrNameOcc rdr_name
+ tccls_occ = setOccNameSpace occ tcClsName
+ tccls_name = setRdrNameOcc rdr_name tccls_occ
+
+ (pcs, unqual, maybe_rn_result) <-
+ renameRdrName dflags hit hst pcs0 iNTERACTIVE icontext 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) }
+ }}}
+
+myParseIdentifier dflags str
+ = do buf <- stringToStringBuffer str
+
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
+
+ case parseIdentifier buf
+ PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<interactive>") 1 } of
+
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ freeStringBuffer buf;
+ return Nothing }
+
+ POk _ rdr_name -> do { --should, but can't: freeStringBuffer buf;
+ return (Just rdr_name) }
+#endif
\end{code}
-
%************************************************************************
%* *
\subsection{Initial persistent state}
%************************************************************************
\begin{code}
-initPersistentCompilerState :: PersistentCompilerState
+initPersistentCompilerState :: IO PersistentCompilerState
initPersistentCompilerState
- = PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleEnv,
- pcs_PRS = initPersistentRenamerState }
-
-initPackageDetails :: PackageSymbolTable
-initPackageDetails = extendTypeEnv emptyModuleEnv wiredInThings
-
-initPersistentRenamerState :: PersistentRenamerState
- = PRS { prsOrig = Orig { origNames = initOrigNames,
- origIParam = emptyFM },
- prsDecls = emptyNameEnv,
- prsInsts = emptyBag,
- prsRules = emptyBag
- }
+ = do prs <- initPersistentRenamerState
+ return (
+ PCS { pcs_PIT = emptyIfaceTable,
+ pcs_PTE = wiredInThingEnv,
+ pcs_insts = emptyInstEnv,
+ pcs_rules = emptyRuleBase,
+ pcs_PRS = prs
+ }
+ )
+
+initPersistentRenamerState :: IO PersistentRenamerState
+ = do us <- mkSplitUniqSupply 'r'
+ return (
+ PRS { prsOrig = NameSupply { nsUniqs = us,
+ nsNames = initOrigNames,
+ nsIPs = emptyFM },
+ prsDecls = (emptyNameEnv, 0),
+ prsInsts = (emptyBag, 0),
+ prsRules = foldr add_rule (emptyBag, 0) builtinRules,
+ prsImpMods = emptyFM
+ }
+ )
+ where
+ add_rule (name,rule) (rules, n_rules)
+ = (gated_decl `consBag` rules, n_rules+1)
+ where
+ gated_decl = (gate_fn, (mod, IfaceRuleOut rdr_name rule))
+ mod = nameModule name
+ rdr_name = mkRdrOrig (moduleName mod) (nameOccName name)
+ gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible
initOrigNames :: FiniteMap (ModuleName,OccName) Name
-initOrigNames = grab knownKeyNames `plusFM` grab (map getName wiredInThings)
- where
- grab names = foldl add emptyFM names
- add env name = addToFM env (moduleName (nameModule name), nameOccName name) name
+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}