%
% (c) The GRASP/AQUA Project, Glasgow University, 1993-2000
%
+
\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
module HscMain ( HscResult(..), hscMain,
+#ifdef GHCI
+ hscStmt, hscThing, hscModuleContents,
+#endif
initPersistentCompilerState ) where
#include "HsVersions.h"
-import Maybe ( isJust )
-import IO ( hPutStrLn, stderr )
+#ifdef GHCI
+import Interpreter
+import ByteCodeGen ( byteCodeGen )
+import CoreTidy ( tidyCoreExpr )
+import CorePrep ( corePrepExpr )
+import Rename ( renameStmt, renameRdrName, slurpIface )
+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 Name ( isLocalName )
+import NameEnv ( lookupNameEnv )
+import RdrName ( rdrEnvElts )
+import PrelNames ( iNTERACTIVE )
+import StringBuffer ( stringToStringBuffer )
+import FastString ( mkFastString )
+import Maybes ( catMaybes )
+
+import List ( nub )
+#endif
+
import HsSyn
-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, checkOldIface, closeIfaceDecls )
+import Finder ( findModule )
+import Rename ( checkOldIface, renameModule, closeIfaceDecls )
import Rules ( emptyRuleBase )
import PrelInfo ( wiredInThingEnv, wiredInThings )
+import PrelRules ( builtinRules )
import PrelNames ( knownKeyNames )
-import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails,
- writeIface, pprIface )
-import TcModule ( TcResults(..), typecheckModule )
+import MkIface ( mkFinalIface )
+import TcModule
import InstEnv ( emptyInstEnv )
-import Desugar ( deSugar )
-import SimplCore ( core2core )
-import OccurAnal ( occurAnalyseBinds )
+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, moduleName, mkModuleInThisPackage )
+import Module ( ModuleName, moduleName, mkHomeModule,
+ moduleUserString, lookupModuleEnv )
import CmdLineOpts
-import ErrUtils ( dumpIfSet_dyn, showPass )
+import DriverState ( v_HCHeader )
+import ErrUtils ( dumpIfSet_dyn, showPass, printError )
import Util ( unJust )
import UniqSupply ( mkSplitUniqSupply )
-import Bag ( emptyBag )
+import Bag ( consBag, emptyBag )
import Outputable
-import Interpreter ( UnlinkedIBind, ItblEnv, stgToInterpSyn )
import HscStats ( ppSourceStats )
-import HscTypes ( ModDetails, ModIface(..), PersistentCompilerState(..),
- PersistentRenamerState(..), ModuleLocation(..),
- HomeSymbolTable,
- OrigNameEnv(..), PackageRuleBase, HomeIfaceTable,
- typeEnvClasses, typeEnvTyCons, emptyIfaceTable )
+import HscTypes
import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName )
-import Name ( emptyNameEnv )
-import Module ( Module, lookupModuleEnvByName )
+import Name ( Name, nameModule, nameOccName, getName, isGlobalName )
+import NameEnv ( emptyNameEnv, mkNameEnv )
+import Module ( Module )
+
+import IOExts ( newIORef, readIORef, writeIORef, modifyIORef,
+ 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],ItblEnv)) -- interpreted code, if any
- PersistentCompilerState -- updated PCS
-
- | HscFail PersistentCompilerState -- updated PCS
+ -- 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
- -> Bool -- source unchanged?
+ :: 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 dflags source_unchanged location maybe_old_iface hst hit pcs
- = do {
- putStrLn ("CHECKING OLD IFACE for hs = " ++ show (ml_hs_file location)
- ++ ", hspp = " ++ show (ml_hspp_file location));
+hscMain ghci_mode dflags mod location source_unchanged have_object
+ maybe_old_iface hst hit pcs
+ = {-# 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))
- <- checkOldIface dflags hit hst pcs (unJust (ml_hi_file location) "hscMain")
- source_unchanged maybe_old_iface;
+ <- _scc_ "checkOldIface"
+ checkOldIface ghci_mode dflags hit hst pcs mod (ml_hi_file location)
+ source_unchanged maybe_old_iface;
if errs_found then
return (HscFail pcs_ch)
what_next | recomp_reqd || no_old_iface = hscRecomp
| otherwise = hscNoRecomp
;
- what_next dflags location maybe_checked_iface
- hst hit pcs_ch
+ what_next ghci_mode dflags have_object mod location
+ maybe_checked_iface hst hit pcs_ch
}}
-hscNoRecomp dflags 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 NOT REQUIRED";
- -- we definitely expect to have the old interface available
- let old_iface = case maybe_checked_iface of
- Just old_if -> old_if
- Nothing -> panic "hscNoRecomp:old_iface"
- this_mod = mi_module old_iface
- ;
+ 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 " ++
+ showModMsg have_object mod location);
+
-- CLOSURE
(pcs_cl, closure_errs, cl_hs_decls)
<- closeIfaceDecls dflags hit hst pcs_ch old_iface ;
else do {
-- TYPECHECK
- maybe_tc_result <- typecheckModule dflags this_mod pcs_cl hst
- old_iface alwaysQualify cl_hs_decls;
+ maybe_tc_result
+ <- typecheckIface dflags pcs_cl hst old_iface cl_hs_decls;
+
case maybe_tc_result of {
Nothing -> return (HscFail pcs_cl);
- Just tc_result -> do {
+ Just (pcs_tc, new_details) ->
- let pcs_tc = tc_pcs tc_result
- 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 (HscOK new_details
- Nothing -- tells CM to use old iface and linkables
- Nothing Nothing -- foreign export stuff
- Nothing -- ibinds
- pcs_tc)
- }}}}
+ return (HscNoRecomp pcs_tc new_details old_iface)
+ }}}
-
-hscRecomp dflags location maybe_checked_iface hst hit pcs_ch
+hscRecomp ghci_mode dflags have_object
+ mod location maybe_checked_iface hst hit pcs_ch
= do {
- ; hPutStrLn stderr "COMPILATION IS REQUIRED";
-
-- 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 " ++
+ showModMsg (not toInterp) mod location);
-------------------
-- PARSE
-------------------
- ; maybe_parsed <- myParseModule dflags (unJust (ml_hspp_file location) "hscRecomp:hspp")
+ ; 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 = mkModuleInThisPackage (hsModuleName rdr_module)
+ ; let this_mod = mkHomeModule (hsModuleName rdr_module)
-------------------
-- RENAME
-------------------
- ; (pcs_rn, maybe_rn_result)
- <- renameModule dflags hit hst pcs_ch this_mod rdr_module
+ ; (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_rn);
- Just (print_unqualified, is_exported, new_iface, rn_hs_decls) -> do {
-
+ 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 <- typecheckModule dflags this_mod pcs_rn hst new_iface
- print_unqualified rn_hs_decls
+ ; maybe_tc_result
+ <- _scc_ "TypeCheck"
+ typecheckModule dflags pcs_rn hst new_iface
+ print_unqualified rn_hs_decls
; case maybe_tc_result of {
- Nothing -> do { hPutStrLn stderr "Typecheck failed"
- ; return (HscFail pcs_rn) } ;
- Just tc_result -> do {
+ Nothing -> return (HscFail pcs_ch{-was: pcs_rn-});
+ Just (pcs_tc, tc_result) -> do {
- ; let pcs_tc = tc_pcs tc_result
- env_tc = tc_env tc_result
- local_insts = tc_insts tc_result
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; (ds_details, foreign_stuff)
+ <- _scc_ "DeSugar"
+ deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
+
+ ; pcs_middle
+ <- _scc_ "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
+
+ -- alive at this point:
+ -- pcs_middle
+ -- foreign_stuff
+ -- ds_details
+ -- new_iface
-------------------
- -- DESUGAR, SIMPLIFY, TIDY-CORE
+ -- SIMPLIFY
-------------------
- -- We grab the the unfoldings at this point.
- ; simpl_result <- dsThenSimplThenTidy dflags (pcs_rules pcs_tc) this_mod
- print_unqualified is_exported tc_result hst
- ; let (tidy_binds, orphan_rules, foreign_stuff) = simpl_result
-
+ ; simpl_details
+ <- _scc_ "Core2Core"
+ core2core dflags pcs_middle hst dont_discard ds_details
+
-------------------
- -- CONVERT TO STG
+ -- TIDY
-------------------
- ; (stg_binds, oa_tidy_binds, cost_centre_info, top_level_ids)
- <- myCoreToStg dflags this_mod tidy_binds
+ ; 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
+
+ ; let final_details = tidy_details {md_binds = []}
+ ; final_details `seq` return ()
-------------------
- -- BUILD THE NEW ModDetails AND ModIface
+ -- PREPARE FOR CODE GENERATION
-------------------
- ; let new_details = mkModDetails env_tc local_insts tidy_binds
- top_level_ids orphan_rules
- ; final_iface <- mkFinalIface dflags location maybe_checked_iface
- new_iface new_details
+ -- Do saturation and convert to A-normal form
+ ; prepd_details <- _scc_ "CorePrep"
+ corePrepPgm dflags tidy_details
-------------------
- -- COMPLETE CODE GENERATION
+ -- CONVERT TO STG and COMPLETE CODE GENERATION
-------------------
- ; (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)
+ ; 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, headers, fe_binders) = foreign_stuff
+
+ -- 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 \"" ++ _UNPK_ fname ++ "\"")
+ . reverse
+ $ headers
+
+ -- ...and add the string to the headers requested via command line
+ -- options
+ --
+ ; modifyIORef v_HCHeader (++ foreign_headers)
+
+ ; 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
+
+ -- Fill in the code-gen info
+ writeIORef cg_info_ref (Just emptyNameEnv)
+
+ ------------------ 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
+
+ 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)
-- and the answer is ...
- ; return (HscOK new_details (Just final_iface)
- maybe_stub_h_filename maybe_stub_c_filename
- maybe_ibinds pcs_tc)
+ ; return (HscRecomp pcs_final
+ final_details
+ final_iface
+ stub_h_exists stub_c_exists
+ maybe_bcos)
}}}}}}}
-
-
-mkFinalIface 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
- writeIface (unJust (ml_hi_file location) "hscRecomp:hi") new_iface
- return new_iface
-
-
myParseModule dflags src_filename
= do -------------------------- Parser ----------------
showPass dflags "Parser"
- -- _scc_ "Parser"
+ _scc_ "Parser" do
buf <- hGetStringBuffer True{-expand tabs-} src_filename
let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ | otherwise = 0#
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc (_PK_ src_filename) 1 } of {
+ 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) ;
(ppSourceStats False rdr_module) ;
return (Just 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)
- <- stgToInterpSyn (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 rule_base this_mod print_unqual is_exported tc_result hst
- = do -------------------------- Desugaring ----------------
- -- _scc_ "DeSugar"
- (desugared, rules, h_code, c_code, fe_binders)
- <- deSugar dflags this_mod print_unqual hst tc_result
-
- -------------------------- Main Core-language transformations ----------------
- -- _scc_ "Core2Core"
- (simplified, orphan_rules)
- <- core2core dflags rule_base hst is_exported desugared rules
-
- -- Do the final tidy-up
- (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
= do
- c2s_uniqs <- mkSplitUniqSupply 'c'
- st_uniqs <- mkSplitUniqSupply 'g'
- let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds
-
- () <- coreBindsSize occ_anal_tidy_binds `seq` return ()
+ () <- 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)
- showPass dflags "Core2Stg"
- -- _scc_ "Core2Stg"
- let stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
+ stg_binds <- _scc_ "Core2Stg"
+ coreToStg dflags tidy_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)
+ (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
+ stg2stg dflags this_mod stg_binds
- return (stg_binds2, occ_anal_tidy_binds, cost_centre_info, final_ids)
+ let env_rhs :: CgInfoEnv
+ env_rhs = mkNameEnv [ caf_info `seq` (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}
%************************************************************************
%* *
-\subsection{Compiling an expression}
+\subsection{Compiling a do-statement}
%* *
%************************************************************************
-hscExpr
+\begin{code}
+#ifdef GHCI
+hscStmt
:: DynFlags
-> HomeSymbolTable
-> HomeIfaceTable
-> PersistentCompilerState -- IN: persistent compiler state
- -> Module -- Context for compiling
- -> String -- The expression
- -> IO HscResult
+ -> InteractiveContext -- Context for compiling
+ -> String -- The statement
+ -> Bool -- just treat it as an expression
+ -> IO ( PersistentCompilerState,
+ Maybe ( [Id],
+ Type,
+ UnlinkedBCOExpr) )
+\end{code}
-hscExpr dflags hst hit pcs this_module expr
- = do { -- Parse it
- ; maybe_parsed <- myParseExpr dflags expr
- ; case maybe_parsed of {
- Nothing -> return (HscFail pcs_ch);
- Just parsed_expr -> do {
+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.
+
+A naked expression returns a singleton Name [it].
+
+ What you type The IO [HValue] that hscStmt returns
+ ------------- ------------------------------------
+ let pat = expr ==> let pat = expr in return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
+
+ pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
+
+ 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]
+
+ expr (of non-IO type,
+ result not showable) ==> error
+
+\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
- (new_pcs, maybe_renamed_expr) <- renameExpr dflags hit hst pcs this_module parsed_expr ;
- case maybe_renamed_expr of {
- Nothing ->
+ (pcs1, print_unqual, maybe_renamed_stmt)
+ <- renameStmt dflags hit hst pcs0 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
+
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
+
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
+
+ ; let
+ -- Make all the bound ids "global" ids, now that
+ -- they're notionally top-level bindings. This is
+ -- important: otherwise when we come to compile an expression
+ -- using these ids later, the byte code generator will consider
+ -- the occurrences to be free rather than global.
+ global_bound_ids = map globaliseId bound_ids;
+ globaliseId id = setGlobalIdDetails id VanillaGlobal
+
+ ; return (pcs2, Just (global_bound_ids, ty, bcos))
+
+ }}}}}
+
+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#
+
+ case parseStmt buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<interactive>") 1 } of {
+
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+-- Not yet implemented in <4.11 freeStringBuffer buf;
+ return Nothing };
+ -- no stmt: the line consisted of just space or comments
+ POk _ Nothing -> return Nothing;
+
+ 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}
+%* *
+%************************************************************************
+
+\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 ic 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 ic 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 do_lookup n
+ | isLocalName 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#
+
+ 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{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}
%************************************************************************
%* *
)
initPersistentRenamerState :: IO PersistentRenamerState
- = do ns <- mkSplitUniqSupply 'r'
+ = do us <- mkSplitUniqSupply 'r'
return (
- PRS { prsOrig = Orig { origNames = initOrigNames,
- origIParam = emptyFM },
- prsDecls = (emptyNameEnv, 0),
- prsInsts = (emptyBag, 0),
- prsRules = (emptyBag, 0),
- prsNS = ns
+ 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 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
--}
\end{code}
projects / ghc-hetmet.git / blobdiff