\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( HscResult(..), hscMain,
+module HscMain ( HscResult(..), hscMain,
#ifdef GHCI
- hscStmt, hscThing,
+ hscStmt, hscThing, hscModuleContents,
#endif
initPersistentCompilerState ) where
#ifdef GHCI
import Interpreter
import ByteCodeGen ( byteCodeGen )
-import CoreTidy ( tidyCoreExpr )
+import TidyPgm ( tidyCoreExpr )
import CorePrep ( corePrepExpr )
-import Rename ( renameStmt, renameRdrName )
+import Rename ( renameStmt, renameRdrName, slurpIface )
import RdrName ( rdrNameOcc, setRdrNameOcc )
import RdrHsSyn ( RdrNameStmt )
import OccName ( dataName, tcClsName,
import Type ( Type )
import Id ( Id, idName, setGlobalIdDetails )
import IdInfo ( GlobalIdDetails(VanillaGlobal) )
-import HscTypes ( InteractiveContext(..) )
+import Name ( isInternalName )
+import NameEnv ( lookupNameEnv )
+import Module ( lookupModuleEnv )
+import RdrName ( rdrEnvElts )
import PrelNames ( iNTERACTIVE )
import StringBuffer ( stringToStringBuffer )
-import FastString ( mkFastString )
import Maybes ( catMaybes )
+
+import List ( nub )
#endif
import HsSyn
import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
import StringBuffer ( hGetStringBuffer, freeStringBuffer )
import Parser
-import Lex ( PState(..), ParseResult(..) )
+import Lex ( ParseResult(..), ExtFlags(..), mkPState )
import SrcLoc ( mkSrcLoc )
import Finder ( findModule )
-import Rename ( checkOldIface, renameModule, closeIfaceDecls )
+import Rename ( checkOldIface, renameModule, renameExtCore,
+ closeIfaceDecls, RnResult(..) )
import Rules ( emptyRuleBase )
import PrelInfo ( wiredInThingEnv, wiredInThings )
import PrelRules ( builtinRules )
-import PrelNames ( knownKeyNames )
+import PrelNames ( knownKeyNames, gHC_PRIM_Name )
import MkIface ( mkFinalIface )
import TcModule
import InstEnv ( emptyInstEnv )
import Desugar
+import Flattening ( flatten, flattenExpr )
import SimplCore
import CoreUtils ( coreBindsSize )
-import CoreTidy ( tidyCorePgm )
+import TidyPgm ( tidyCorePgm )
import CorePrep ( corePrepPgm )
import StgSyn
import CoreToStg ( coreToStg )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
-import CodeOutput ( codeOutput )
+import CodeOutput ( codeOutput, outputForeignStubs )
-import Module ( ModuleName, moduleName, mkHomeModule,
- moduleUserString )
+import Module ( ModuleName, moduleName, mkHomeModule )
import CmdLineOpts
+import DriverState ( v_HCHeader )
+import DriverPhases ( isExtCore_file )
import ErrUtils ( dumpIfSet_dyn, showPass, printError )
-import Util ( unJust )
import UniqSupply ( mkSplitUniqSupply )
import Bag ( consBag, emptyBag )
import HscTypes
import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName, isGlobalName )
+import Name ( Name, nameModule, nameOccName, getName )
import NameEnv ( emptyNameEnv, mkNameEnv )
import Module ( Module )
+import FastString
+import Maybes ( expectJust )
+import Util ( seqList )
-import IOExts ( newIORef, readIORef, writeIORef, unsafePerformIO )
+import IOExts ( newIORef, readIORef, writeIORef,
+ unsafePerformIO )
import Monad ( when )
import Maybe ( isJust, fromJust )
import IO
import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
+
\end{code}
hscMain ghci_mode dflags mod location source_unchanged have_object
maybe_old_iface hst hit pcs
- = do {
+ = {-# SCC "hscMain" #-}
+ do {
showPass dflags ("Checking old interface for hs = "
++ show (ml_hs_file location)
++ ", hspp = " ++ show (ml_hspp_file location));
(pcs_ch, errs_found, (recomp_reqd, maybe_checked_iface))
<- _scc_ "checkOldIface"
- checkOldIface ghci_mode dflags hit hst pcs (ml_hi_file location)
+ checkOldIface ghci_mode dflags hit hst pcs mod (ml_hi_file location)
source_unchanged maybe_old_iface;
if errs_found then
= do {
when (verbosity dflags >= 1) $
hPutStrLn stderr ("Skipping " ++
- compMsg have_object mod location);
+ showModMsg have_object mod location);
-- CLOSURE
(pcs_cl, closure_errs, cl_hs_decls)
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 toInterp = dopt_HscLang dflags == HscInterpreted
; let toNothing = dopt_HscLang dflags == HscNothing
+ ; let toCore = isJust (ml_hs_file location) &&
+ isExtCore_file (fromJust (ml_hs_file location))
; when (ghci_mode /= OneShot && verbosity dflags >= 1) $
hPutStrLn stderr ("Compiling " ++
- 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
+ showModMsg (not toInterp) mod location);
+
+ ; front_res <-
+ (if toCore then hscCoreFrontEnd else hscFrontEnd)
+ ghci_mode dflags location hst hit pcs_ch
+ ; case front_res of
+ Left flure -> return flure;
+ Right (this_mod, rdr_module,
+ dont_discard, new_iface,
+ pcs_tc, ds_details, foreign_stuff) -> do {
+
+ let {
+ imported_module_names =
+ filter (/= gHC_PRIM_Name) $
+ map ideclName (hsModuleImports rdr_module);
+
+ imported_modules =
+ map (moduleNameToModule hit (pcs_PIT pcs_tc))
+ imported_module_names;
+ }
+
+ -- force this out now, so we don't keep a hold of rdr_module or pcs_tc
+ ; seqList imported_modules (return ())
-------------------
- -- TYPECHECK
+ -- FLATTENING
-------------------
- ; 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
+ ; flat_details
+ <- _scc_ "Flattening"
+ flatten dflags pcs_tc hst ds_details
; pcs_middle
- <- if ghci_mode == OneShot
+ <- _scc_ "pcs_middle"
+ if ghci_mode == OneShot
then do init_pcs <- initPersistentCompilerState
init_prs <- initPersistentRenamerState
let
pcs_rules = rules }
else return pcs_tc
+-- Should we remove bits of flat_details at this point?
+-- ; flat_details <- case flat_details of
+-- ModDetails { md_binds = binds } ->
+-- return ModDetails { md_binds = binds,
+-- md_rules = [],
+-- md_types = emptyTypeEnv,
+-- md_insts = [] }
+
+ -- alive at this point:
+ -- pcs_middle
+ -- foreign_stuff
+ -- flat_details
+ -- imported_modules (seq'd)
+ -- new_iface
+
-------------------
-- SIMPLIFY
-------------------
; simpl_details
<- _scc_ "Core2Core"
- core2core dflags pcs_middle hst dont_discard ds_details
+ core2core dflags pcs_middle hst dont_discard flat_details
-------------------
-- TIDY
-- new_iface
; emitExternalCore dflags new_iface tidy_details
+
+ ; let final_details = tidy_details {md_binds = []}
+ ; final_details `seq` return ()
+
-------------------
-- PREPARE FOR CODE GENERATION
-------------------
-- Do saturation and convert to A-normal form
- ; prepd_details <- _scc_ "CorePrep" corePrepPgm dflags tidy_details
+ ; prepd_details <- _scc_ "CorePrep"
+ corePrepPgm dflags tidy_details
-------------------
-- CONVERT TO STG and COMPLETE CODE GENERATION
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, headers, fe_binders) = foreign_stuff
- (h_code,c_code,fe_binders) = foreign_stuff
-
- ; imported_modules <- mapM mod_name_to_Module imported_module_names
+ -- turn the list of headers requested in foreign import
+ -- declarations into a string suitable for emission into generated
+ -- C code...
+ --
+ foreign_headers =
+ unlines
+ . map (\fname -> "#include \"" ++ unpackFS fname ++ "\"")
+ . reverse
+ $ headers
+
+ -- ...and add the string to the headers requested via command line
+ -- options
+ --
+ ; fhdrs <- readIORef v_HCHeader
+ ; writeIORef v_HCHeader (fhdrs ++ foreign_headers)
; (stub_h_exists, stub_c_exists, maybe_bcos, final_iface )
<- if toInterp
mkFinalIface ghci_mode dflags location
maybe_checked_iface new_iface tidy_details
- return ( False, False, Just (bcos,itbl_env), final_iface )
+ ------------------ Create f-x-dynamic C-side stuff ---
+ (istub_h_exists, istub_c_exists)
+ <- outputForeignStubs dflags c_code h_code
+
+ return ( istub_h_exists, istub_c_exists,
+ Just (bcos,itbl_env), final_iface )
#else
then error "GHC not compiled with interpreter"
#endif
----------------- Convert to STG ------------------
(stg_binds, cost_centre_info, stg_back_end_info)
<- _scc_ "CoreToStg"
- myCoreToStg dflags this_mod binds
+ myCoreToStg dflags this_mod binds
-- Fill in the code-gen info for the earlier tidyCorePgm
writeIORef cg_info_ref (Just stg_back_end_info)
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
+ 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
+ <- 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)
- }}}}}}}
+ }}
+
+hscCoreFrontEnd ghci_mode dflags location hst hit pcs_ch = do {
+ -------------------
+ -- PARSE
+ -------------------
+ ; inp <- readFile (expectJust "hscCoreFrontEnd:hspp" (ml_hspp_file location))
+ ; case parseCore inp 1 of
+ FailP s -> hPutStrLn stderr s >> return (Left (HscFail pcs_ch));
+ OkP rdr_module -> do {
+ ; let this_mod = mkHomeModule (hsModuleName rdr_module)
+
+ -------------------
+ -- RENAME
+ -------------------
+ ; (pcs_rn, print_unqual, maybe_rn_result)
+ <- renameExtCore dflags hit hst pcs_ch this_mod rdr_module
+ ; case maybe_rn_result of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just (dont_discard, new_iface, rn_decls) -> do {
+
+ -------------------
+ -- TYPECHECK
+ -------------------
+ ; maybe_tc_result
+ <- _scc_ "TypeCheck"
+ typecheckCoreModule dflags pcs_rn hst new_iface rn_decls
+ ; case maybe_tc_result of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just (pcs_tc, tc_result) -> do {
+
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; (ds_details, foreign_stuff) <- deSugarCore tc_result
+ ; return (Right (this_mod, rdr_module, dont_discard, new_iface,
+ pcs_tc, ds_details, foreign_stuff))
+ }}}}}}
+
+
+hscFrontEnd ghci_mode dflags location hst hit pcs_ch = do {
+ -------------------
+ -- PARSE
+ -------------------
+ ; maybe_parsed <- myParseModule dflags
+ (expectJust "hscRecomp:hspp" (ml_hspp_file location))
+ ; case maybe_parsed of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just rdr_module -> do {
+ ; let this_mod = mkHomeModule (hsModuleName rdr_module)
+
+ -------------------
+ -- RENAME
+ -------------------
+ ; (pcs_rn, print_unqual, maybe_rn_result)
+ <- _scc_ "Rename"
+ renameModule dflags ghci_mode hit hst pcs_ch this_mod rdr_module
+ ; case maybe_rn_result of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just (dont_discard, new_iface, rn_result) -> do {
+
+ -------------------
+ -- TYPECHECK
+ -------------------
+ ; maybe_tc_result
+ <- _scc_ "TypeCheck"
+ typecheckModule dflags pcs_rn hst print_unqual rn_result
+ ; case maybe_tc_result of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just (pcs_tc, tc_result) -> do {
+
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; (ds_details, foreign_stuff)
+ <- _scc_ "DeSugar"
+ deSugar dflags pcs_tc hst this_mod print_unqual tc_result
+ ; return (Right (this_mod, rdr_module, dont_discard, new_iface,
+ pcs_tc, ds_details, foreign_stuff))
+ }}}}}}}
+
myParseModule dflags src_filename
= do -------------------------- Parser ----------------
showPass dflags "Parser"
_scc_ "Parser" do
+ buf <- hGetStringBuffer src_filename
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
+ let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
+ ffiEF = dopt Opt_FFI dflags,
+ withEF = dopt Opt_With dflags,
+ parrEF = dopt Opt_PArr dflags}
+ loc = mkSrcLoc (mkFastString src_filename) 1
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parseModule buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc (_PK_ src_filename) 1 } of {
+ case parseModule buf (mkPState loc exts) of {
PFailed err -> do { hPutStrLn stderr (showSDoc err);
freeStringBuffer buf;
() <- coreBindsSize tidy_binds `seq` return ()
-- TEMP: the above call zaps some space usage allocated by the
-- simplifier, which for reasons I don't understand, persists
- -- thoroughout code generation
+ -- thoroughout code generation -- JRS
+ --
+ -- This is still necessary. -- SDM (10 Dec 2001)
- stg_binds <- _scc_ "Core2Stg" coreToStg dflags tidy_binds
+ stg_binds <- _scc_ "Core2Stg"
+ coreToStg dflags tidy_binds
- (stg_binds2, cost_centre_info)
- <- _scc_ "Core2Stg" stg2stg dflags this_mod stg_binds
+ (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
+ stg2stg dflags this_mod stg_binds
let env_rhs :: CgInfoEnv
- env_rhs = mkNameEnv [ (idName bndr, CgInfo caf_info)
+ env_rhs = mkNameEnv [ caf_info `seq` (idName bndr, CgInfo caf_info)
| (bind,_) <- stg_binds2,
let caf_info
| stgBindHasCafRefs bind = MayHaveCafRefs
-- Rename it
(pcs1, print_unqual, maybe_renamed_stmt)
- <- renameStmt dflags hit hst pcs0
- iNTERACTIVE icontext parsed_stmt
+ <- renameStmt dflags hit hst pcs0 icontext parsed_stmt
; case maybe_renamed_stmt of
Nothing -> return (pcs0, Nothing)
-- Desugar it
ds_expr <- deSugarExpr dflags pcs2 hst iNTERACTIVE print_unqual tc_expr
+ -- Flatten it
+ ; flat_expr <- flattenExpr dflags pcs2 hst ds_expr
+
-- Simplify it
- ; simpl_expr <- simplifyExpr dflags pcs2 hst ds_expr
+ ; simpl_expr <- simplifyExpr dflags pcs2 hst flat_expr
-- Tidy it (temporary, until coreSat does cloning)
; tidy_expr <- tidyCoreExpr simpl_expr
hscParseStmt dflags str
= do -------------------------- Parser ----------------
showPass dflags "Parser"
- _scc_ "Parser" do
+ _scc_ "Parser" do
buf <- stringToStringBuffer str
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
+ ffiEF = dopt Opt_FFI dflags,
+ withEF = dopt Opt_With dflags,
+ parrEF = dopt Opt_PArr dflags}
+ loc = mkSrcLoc FSLIT("<interactive>") 1
- case parseStmt buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<interactive>") 1 } of {
+ case parseStmt buf (mkPState loc exts) of {
PFailed err -> do { hPutStrLn stderr (showSDoc err);
-- Not yet implemented in <4.11 freeStringBuffer buf;
-> IO ( PersistentCompilerState,
[TyThing] )
-hscThing dflags hst hit pcs0 icontext str
+hscThing dflags hst hit pcs0 ic str
= do maybe_rdr_name <- myParseIdentifier dflags str
case maybe_rdr_name of {
Nothing -> return (pcs0, []);
tccls_name = setRdrNameOcc rdr_name tccls_occ
(pcs, unqual, maybe_rn_result) <-
- renameRdrName dflags hit hst pcs0 iNTERACTIVE icontext rdr_names
+ renameRdrName dflags hit hst pcs0 ic rdr_names
case maybe_rn_result of {
Nothing -> return (pcs, []);
case maybe_pcs of {
Nothing -> return (pcs, []);
Just pcs ->
- let maybe_ty_things = map (lookupType hst (pcs_PTE pcs)) names
+ let do_lookup n
+ | isInternalName n = lookupNameEnv (ic_type_env ic) n
+ | otherwise = lookupType hst (pcs_PTE pcs) n
+
+ maybe_ty_things = map do_lookup names
in
return (pcs, catMaybes maybe_ty_things) }
}}}
myParseIdentifier dflags str
= do buf <- stringToStringBuffer str
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
+ ffiEF = dopt Opt_FFI dflags,
+ withEF = dopt Opt_With dflags,
+ parrEF = dopt Opt_PArr dflags}
+ loc = mkSrcLoc FSLIT("<interactive>") 1
- case parseIdentifier buf
- PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<interactive>") 1 } of
+ case parseIdentifier buf (mkPState loc exts) of
PFailed err -> do { hPutStrLn stderr (showSDoc err);
freeStringBuffer buf;
%************************************************************************
%* *
+\subsection{Find all the things defined in a module}
+%* *
+%************************************************************************
+
+\begin{code}
+#ifdef GHCI
+hscModuleContents
+ :: DynFlags
+ -> HomeSymbolTable
+ -> HomeIfaceTable
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> Module -- module to inspect
+ -> Bool -- grab just the exports, or the whole toplev
+ -> IO (PersistentCompilerState, Maybe [TyThing])
+
+hscModuleContents dflags hst hit pcs0 mod exports_only = do {
+
+ -- slurp the interface if necessary
+ (pcs1, print_unqual, maybe_rn_stuff)
+ <- slurpIface dflags hit hst pcs0 mod;
+
+ case maybe_rn_stuff of {
+ Nothing -> return (pcs0, Nothing);
+ Just (names, rn_decls) -> do {
+
+ -- Typecheck the declarations
+ maybe_pcs <-
+ typecheckExtraDecls dflags pcs1 hst print_unqual iNTERACTIVE rn_decls;
+
+ case maybe_pcs of {
+ Nothing -> return (pcs1, Nothing);
+ Just pcs2 ->
+
+ let { all_names
+ | exports_only = names
+ | otherwise =
+ let { iface = fromJust (lookupModuleEnv hit mod);
+ env = fromJust (mi_globals iface);
+ range = rdrEnvElts env;
+ } in
+ -- grab all the things from the global env that are locally def'd
+ nub [ n | elts <- range, GRE n LocalDef _ <- elts ];
+
+ pte = pcs_PTE pcs2;
+
+ ty_things = map (fromJust . lookupType hst pte) all_names;
+
+ } in
+
+ return (pcs2, Just ty_things)
+ }}}}
+#endif
+\end{code}
+
+%************************************************************************
+%* *
\subsection{Initial persistent state}
%* *
%************************************************************************
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