%
% (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,
+#endif
+ initPersistentCompilerState ) where
#include "HsVersions.h"
-import Monad ( when )
-import IO ( hPutStr, hClose, stderr, openFile, IOMode(..) )
+#ifdef GHCI
+import ByteCodeGen ( byteCodeGen )
+import CoreTidy ( tidyCoreExpr )
+import CorePrep ( corePrepExpr )
+import Rename ( renameStmt )
+import RdrHsSyn ( RdrNameStmt )
+import Type ( Type )
+import Id ( Id, idName, setGlobalIdDetails )
+import IdInfo ( GlobalIdDetails(VanillaGlobal) )
+import HscTypes ( InteractiveContext(..) )
+import PrelNames ( iNTERACTIVE )
+import StringBuffer ( stringToStringBuffer )
+#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, checkOldIface )
-
-import PrelInfo ( wiredInThings )
-import PrelRules ( builtinRules )
-import MkIface ( completeIface, mkModDetailsFromIface )
-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 ( vanillaSyntaxMap, 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,
- moduleUserString, moduleName )
+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 )
-import StgInterp ( stgToInterpSyn )
+import Interpreter
+import CmStaticInfo ( GhciMode(..) )
import HscStats ( ppSourceStats )
-import HscTypes ( ModDetails, ModIface, PersistentCompilerState(..),
- PersistentRenamerState(..), WhatsImported(..),
- HomeSymbolTable, PackageSymbolTable, ImportVersion,
- GenAvailInfo(..), RdrAvailInfo, OrigNameEnv(..),
- PackageRuleBase )
-import RnMonad ( ExportItem, ParsedIface(..) )
-import CmSummarise ( ModSummary )
-import InterpSyn ( UnlinkedIBind )
-import StgInterp ( ItblEnv )
+import HscTypes
import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
-import OccName ( OccName, pprOccName )
-import Name ( Name, nameModule )
+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
\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
+ (Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any
+
+
-- 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 dflags 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 {
- -- ????? source_unchanged :: Bool -- extracted from summary?
+ showPass dflags ("Checking old interface for hs = "
+ ++ show (ml_hs_file location)
+ ++ ", hspp = " ++ show (ml_hspp_file location));
- (ch_pcs, check_errs, (recomp_reqd, maybe_checked_iface))
- <- checkOldIface dflags finder hit hst pcs mod source_unchanged
- maybe_old_iface;
- if check_errs then
- return (HscFail ch_pcs)
+ (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
;
- return (what_next dflags core_cmds stg_cmds summary hit hst
- pcs2 maybe_checked_iface)
+ what_next ghci_mode dflags have_object mod location
+ maybe_checked_iface hst hit pcs_ch
}}
-hscNoRecomp dflags core_cmds stg_cmds summary hit hst pcs maybe_old_iface
+-- 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 {
- -- we definitely expect to have the old interface available
- let old_iface = case maybe_old_iface of
- Just old_if -> old_if
- Nothing -> panic "hscNoRecomp:old_iface"
- ;
+ 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 finder hit hst pcs old_iface ;
+ <- closeIfaceDecls dflags hit hst pcs_ch old_iface ;
if closure_errs then
- return (HscFail cl_pcs)
+ return (HscFail pcs_cl)
else do {
-- TYPECHECK
- maybe_tc_result
- <- typecheckModule dflags mod pcs_cl hst hit pit cl_hs_decls;
- case maybe_tc_result of {
- Nothing -> return (HscFail cl_pcs);
- Just tc_result -> do {
-
- let pcs_tc = tc_pcs tc_result
- env_tc = tc_env tc_result
- binds_tc = tc_binds tc_result
- local_tycons = tc_tycons tc_result
- local_classes = tc_classes 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 final_details
- Nothing -- tells CM to use old iface and linkables
- Nothing Nothing -- foreign export stuff
- Nothing -- ibinds
- pcs_tc)
- }}}}
-
+ maybe_tc_result
+ <- typecheckIface dflags pcs_cl hst old_iface (vanillaSyntaxMap, cl_hs_decls);
-hscRecomp dflags core_cmds stg_cmds summary hit hst pcs maybe_old_iface
- = do {
- -- what target are we shooting for?
- let toInterp = dopt_HscLang dflags == HscInterpreted
- ;
- -- PARSE
- maybe_parsed <- myParseModule dflags summary;
- case maybe_parsed of {
- Nothing -> return (HscFail pcs);
- Just rdr_module -> do {
-
- -- RENAME
- (pcs_rn, maybe_rn_result)
- <- renameModule dflags finder hit hst pcs mod rdr_module;
- case maybe_rn_result of {
- Nothing -> return (HscFail pcs_rn);
- Just (new_iface, rn_hs_decls) -> do {
-
- -- TYPECHECK
- maybe_tc_result
- <- typecheckModule dflags mod pcs_rn hst hit pit rn_hs_decls;
case maybe_tc_result of {
- Nothing -> return (HscFail pcs_rn);
- Just tc_result -> do {
-
- let pcs_tc = tc_pcs tc_result
- env_tc = tc_env tc_result
- binds_tc = tc_binds tc_result
- local_tycons = tc_tycons tc_result
- local_classes = tc_classes tc_result
- local_insts = tc_insts tc_result
- ;
- -- DESUGAR, SIMPLIFY, TIDY-CORE
- -- We grab the the unfoldings at this point.
- (tidy_binds, orphan_rules, foreign_stuff)
- <- dsThenSimplThenTidy dflags mod tc_result ds_uniqs
- ;
- -- CONVERT TO STG
- (stg_binds, cost_centre_info, top_level_ids)
- <- myCoreToStg c2s_uniqs st_uniqs this_mod tidy_binds
- ;
- -- cook up a new ModDetails now we (finally) have all the bits
- let new_details = mkModDetails tc_env local_insts tidy_binds
- top_level_ids orphan_rules
- ;
- -- and possibly create a new ModIface
- let maybe_final_iface = completeIface maybe_old_iface new_iface new_details
- ;
- -- do the rest of code generation/emission
- (maybe_ibinds, maybe_stub_h_filename, maybe_stub_c_filename)
- <- restOfCodeGeneration toInterp
- this_mod imported_modules cost_centre_info
- fe_binders tc_env stg_binds
- ;
- -- and the answer is ...
- return (HscOK new_details maybe_final_iface
- maybe_stub_h_filename maybe_stub_c_filename
- maybe_ibinds pcs_tc)
- }}}}}}}
-
-
-myParseModule dflags summary
- = do -------------------------- Reader ----------------
- show_pass "Parser"
- -- _scc_ "Parser"
-
- let src_filename -- name of the preprocessed source file
- = case ms_ppsource summary of
- Just (filename, fingerprint) -> filename
- Nothing -> pprPanic
- "myParseModule:summary is not of a source module"
- (ppr summary)
+ 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
+
+ -------------------
+ -- 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
+ 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 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#
+ | otherwise = 0#
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc 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 _ _ _ _ _ _) ->
-
- 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)
- }
+ POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do {
-
-restOfCodeGeneration toInterp this_mod imported_modules cost_centre_info
- foreign_stuff tc_env stg_binds
- | toInterp
- = return (Nothing, Nothing,
- Just (stgToInterpSyn stg_binds local_tycons local_classes))
- | otherwise
- = do -------------------------- Code generation -------------------------------
- show_pass "CodeGen"
- -- _scc_ "CodeGen"
- abstractC <- codeGen this_mod imported_modules
- cost_centre_info fe_binders
- local_tycons local_classes stg_binds
-
- -------------------------- Code output -------------------------------
- show_pass "CodeOutput"
- -- _scc_ "CodeOutput"
- let (fe_binders, h_code, c_code) = foreign_stuff
- (maybe_stub_h_name, maybe_stub_c_name)
- <- codeOutput this_mod local_tycons local_classes
- occ_anal_tidy_binds stg_binds2
- c_code h_code abstractC ncg_uniqs
-
- return (maybe_stub_h_name, maybe_stub_c_name, Nothing)
- where
- local_tycons = tcEnvTyCons tc_env
- local_classes = tcEnvClasses tc_env
-
-
-dsThenSimplThenTidy dflags mod tc_result
--- make up ds_uniqs here
- = do -------------------------- Desugaring ----------------
- -- _scc_ "DeSugar"
- (desugared, rules, h_code, c_code, fe_binders)
- <- deSugar this_mod ds_uniqs tc_result
-
- -------------------------- Main Core-language transformations ----------------
- -- _scc_ "Core2Core"
- (simplified, orphan_rules) <- core2core core_cmds desugared rules
-
- -- Do the final tidy-up
- (tidy_binds, tidy_orphan_rules)
- <- tidyCorePgm this_mod simplified orphan_rules
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_module) ;
- return (tidy_binds, tidy_orphan_rules, (fe_binders,h_code,c_code))
-
+ dumpIfSet_dyn dflags Opt_D_source_stats "Source Statistics"
+ (ppSourceStats False rdr_module) ;
+
+ return (Just rdr_module)
+ -- ToDo: free the string buffer later.
+ }}
-myCoreToStg c2s_uniqs st_uniqs this_mod tidy_binds
- = do let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds
- () <- coreBindsSize occ_anal_tidy_binds `seq` return ()
+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
- show_pass "Core2Stg"
- -- _scc_ "Core2Stg"
- let stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
-
- show_pass "Stg2Stg"
- -- _scc_ "Stg2Stg"
- (stg_binds2, cost_centre_info) <- stg2stg stg_cmds this_mod st_uniqs stg_binds
- let final_ids = collectFinalStgBinders (map fst stg_binds2)
-
- return (stg_binds2, cost_centre_info, final_ids)
-
-#if 0
--- BEGIN old stuff
- -- 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 'g' >>= \ st_uniqs -> -- stg-to-stg passes
- mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
-
- -------------------------- 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)) >>
-
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
--- END old stuff
-#endif
+ 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
\end{code}
%************************************************************************
%* *
-\subsection{Initial persistent state}
+\subsection{Compiling a do-statement}
%* *
%************************************************************************
\begin{code}
-initPersistentCompilerState :: IO PersistentCompilerState
-initPersistentCompilerState
- = do prs <- initPersistentRenamerState
- return (
- PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleEnv,
- pcs_PRS = prs
- }
- )
+#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}
-initPackageDetails :: PackageSymbolTable
-initPackageDetails = extendTypeEnv emptyModuleEnv wiredInThings
+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.
-initPersistentRenamerState :: IO PersistentRenamerState
- = do ns <- mkSplitUniqSupply 'r'
- return (
- PRS { prsOrig = Orig { origNames = initOrigNames,
- origIParam = emptyFM },
- prsDecls = emptyNameEnv,
- prsInsts = emptyBag,
- prsRules = emptyBag,
- prsNS = ns
- }
- )
+A naked expression returns a singleton Name [it].
-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
+ 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,...]
-initRules :: PackageRuleBase
-initRules = foldl add emptyVarEnv builtinRules
- where
- add env (name,rule) = extendNameEnv_C add1 env name [rule]
- add1 rules _ = rule : rules
-\end{code}
+ 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}
-writeIface this_mod old_iface new_iface
- local_tycons local_classes inst_info
- final_ids tidy_binds tidy_orphan_rules
- =
- if isNothing opt_HiDir && isNothing opt_HiFile
- then return () -- not producing any .hi file
- else
-
- let
- hi_suf = case opt_HiSuf of { Nothing -> "hi"; Just suf -> suf }
- filename = case opt_HiFile of {
- Just f -> f;
- Nothing ->
- case opt_HiDir of {
- Just dir -> dir ++ '/':moduleUserString this_mod
- ++ '.':hi_suf;
- Nothing -> panic "writeIface"
- }}
- in
-
- do maybe_final_iface <- checkIface old_iface full_new_iface
- case maybe_final_iface of {
- Nothing -> when opt_D_dump_rn_trace $
- putStrLn "Interface file unchanged" ; -- No need to update .hi file
-
- Just final_iface ->
-
- do let mod_vers_unchanged = case old_iface of
- Just iface -> pi_vers iface == pi_vers final_iface
- Nothing -> False
- when (mod_vers_unchanged && opt_D_dump_rn_trace) $
- putStrLn "Module version unchanged, but usages differ; hence need new hi file"
-
- if_hdl <- openFile filename WriteMode
- printForIface if_hdl (pprIface final_iface)
- hClose if_hdl
- }
- where
- full_new_iface = completeIface new_iface local_tycons local_classes
- inst_info final_ids tidy_binds
- tidy_orphan_rules
- isNothing = not . isJust
-\end{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 { (syn, ExprStmt e _, decls) ->
+ typecheckExpr dflags pcs1 hst type_env
+ print_unqual iNTERACTIVE (syn,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
+
+ -- 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
-%************************************************************************
-%* *
-\subsection{Printing the interface}
-%* *
-%************************************************************************
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
-\begin{code}
-pprIface (ParsedIface { pi_mod = mod, pi_vers = mod_vers, pi_orphan = orphan,
- pi_usages = usages, pi_exports = exports,
- pi_fixity = (fix_vers, fixities),
- pi_insts = insts, pi_decls = decls,
- pi_rules = (rule_vers, rules), pi_deprecs = deprecs })
- = vcat [ ptext SLIT("__interface")
- <+> doubleQuotes (ptext opt_InPackage)
- <+> ppr mod <+> ppr mod_vers <+> pp_sub_vers
- <+> (if orphan then char '!' else empty)
- <+> int opt_HiVersion
- <+> ptext SLIT("where")
- , vcat (map pprExport exports)
- , vcat (map pprUsage usages)
- , pprFixities fixities
- , vcat [ppr i <+> semi | i <- insts]
- , vcat [ppr_vers v <+> ppr d <> semi | (v,d) <- decls]
- , pprRules rules
- , pprDeprecs deprecs
- ]
- where
- ppr_vers v | v == initialVersion = empty
- | otherwise = int v
- pp_sub_vers
- | fix_vers == initialVersion && rule_vers == initialVersion = empty
- | otherwise = brackets (ppr fix_vers <+> ppr rule_vers)
-\end{code}
+ case parseStmt buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc SLIT("<no file>") 0 } of {
-When printing export lists, we print like this:
- Avail f f
- AvailTC C [C, x, y] C(x,y)
- AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+-- Not yet implemented in <4.11 freeStringBuffer buf;
+ return Nothing };
-\begin{code}
-pprExport :: ExportItem -> SDoc
-pprExport (mod, items)
- = hsep [ ptext SLIT("__export "), ppr mod, hsep (map upp_avail items) ] <> semi
- where
- upp_avail :: RdrAvailInfo -> SDoc
- upp_avail (Avail name) = pprOccName name
- upp_avail (AvailTC name []) = empty
- upp_avail (AvailTC name ns) = hcat [pprOccName name, bang, upp_export ns']
- where
- bang | name `elem` ns = empty
- | otherwise = char '|'
- ns' = filter (/= name) ns
-
- upp_export [] = empty
- upp_export names = braces (hsep (map pprOccName names))
-\end{code}
+ -- no stmt: the line consisted of just space or comments
+ POk _ Nothing -> return Nothing;
+ POk _ (Just rdr_stmt) -> do {
-\begin{code}
-pprUsage :: ImportVersion OccName -> SDoc
-pprUsage (m, has_orphans, is_boot, whats_imported)
- = hsep [ptext SLIT("import"), ppr (moduleName m),
- pp_orphan, pp_boot,
- upp_import_versions whats_imported
- ] <> semi
- where
- pp_orphan | has_orphans = char '!'
- | otherwise = empty
- pp_boot | is_boot = char '@'
- | otherwise = empty
-
- -- Importing the whole module is indicated by an empty list
- upp_import_versions NothingAtAll = empty
- upp_import_versions (Everything v) = dcolon <+> int v
- upp_import_versions (Specifically vm vf vr nvs)
- = dcolon <+> int vm <+> int vf <+> int vr <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
+ --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{Initial persistent state}
+%* *
+%************************************************************************
\begin{code}
-pprFixities [] = empty
-pprFixities fixes = hsep (map ppr fixes) <> semi
+initPersistentCompilerState :: IO PersistentCompilerState
+initPersistentCompilerState
+ = do prs <- initPersistentRenamerState
+ return (
+ PCS { pcs_PIT = emptyIfaceTable,
+ pcs_PTE = wiredInThingEnv,
+ pcs_insts = emptyInstEnv,
+ pcs_rules = emptyRuleBase,
+ pcs_PRS = prs
+ }
+ )
-pprRules [] = empty
-pprRules rules = hsep [ptext SLIT("{-## __R"), hsep (map ppr rules), ptext SLIT("##-}")]
+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
+ }
+ )
-pprDeprecs [] = empty
-pprDeprecs deps = hsep [ ptext SLIT("{-## __D"), guts, ptext SLIT("##-}")]
- where
- guts = hsep [ ppr ie <+> doubleQuotes (ppr txt) <> semi
- | Deprecation ie txt _ <- deps ]
+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}
-
-