\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( hscMain ) where
+module HscMain ( HscResult(..), hscMain,
+ initPersistentCompilerState ) where
#include "HsVersions.h"
-import IO ( hPutStr, stderr )
+import Maybe ( isJust )
+import IO ( hPutStrLn, stderr )
import HsSyn
-import RdrHsSyn ( RdrNameHsModule )
-import FastString ( unpackFS )
import StringBuffer ( hGetStringBuffer )
-import Parser ( parse )
+import Parser
import Lex ( PState(..), ParseResult(..) )
import SrcLoc ( mkSrcLoc )
-import Rename ( renameModule )
-
-import PrelInfo ( wiredInThings )
-import MkIface ( writeIface )
+import Rename ( renameModule, checkOldIface, closeIfaceDecls )
+import Rules ( emptyRuleBase )
+import PrelInfo ( wiredInThingEnv, wiredInThings )
+import PrelNames ( knownKeyNames )
+import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails,
+ writeIface, pprIface )
import TcModule ( TcResults(..), typecheckModule )
+import InstEnv ( emptyInstEnv )
import Desugar ( deSugar )
import SimplCore ( core2core )
import OccurAnal ( occurAnalyseBinds )
import CodeGen ( codeGen )
import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleNameUserString )
+import Module ( ModuleName, moduleName, mkModuleInThisPackage )
import CmdLineOpts
-import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
+import ErrUtils ( dumpIfSet_dyn, showPass )
+import Util ( unJust )
import UniqSupply ( mkSplitUniqSupply )
+import Bag ( emptyBag )
import Outputable
-import Char ( isSpace )
-import StgInterp ( runStgI )
+import Interpreter ( UnlinkedIBind, ItblEnv, stgToInterpSyn )
import HscStats ( ppSourceStats )
+import HscTypes ( ModDetails, ModIface(..), PersistentCompilerState(..),
+ PersistentRenamerState(..), ModuleLocation(..),
+ HomeSymbolTable,
+ OrigNameEnv(..), PackageRuleBase, HomeIfaceTable,
+ typeEnvClasses, typeEnvTyCons, emptyIfaceTable )
+import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
+import OccName ( OccName )
+import Name ( Name, nameModule, nameOccName, getName )
+import Name ( emptyNameEnv )
+import Module ( Module, lookupModuleEnvByName )
+
+import Monad ( when )
\end{code}
(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
+ (Maybe ([UnlinkedIBind],ItblEnv)) -- interpreted code, if any
PersistentCompilerState -- updated PCS
- (Bag WarnMsg) -- warnings
- | HscErrs PersistentCompilerState -- updated PCS
- (Bag ErrMsg) -- errors
- (Bag WarnMsg) -- warnings
+ | HscFail PersistentCompilerState -- updated PCS
+ -- 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.)
+ :: DynFlags
+ -> Bool -- source unchanged?
+ -> ModuleLocation -- location info
+ -> 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 =
-
- -------------------------- 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 "hscMain:summary is not of a source module"
- (ppr summary)
-
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
-
- let glaexts | opt_GlasgowExts = 1#
- | otherwise = 0#
-
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
-
- PFailed err -> return (CompErrs pcs err)
+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));
+
+ (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;
+
+ 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 dflags location maybe_checked_iface
+ hst hit pcs_ch
+ }}
+
+
+hscNoRecomp dflags location maybe_checked_iface hst hit pcs_ch
+ = 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"
+ ;
+ -- 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 <- typecheckModule dflags pcs_cl hst
+ old_iface alwaysQualify cl_hs_decls;
+ case maybe_tc_result of {
+ Nothing -> return (HscFail pcs_cl);
+ Just (pcs_tc, tc_result) -> do {
+
+ let 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)
+ }}}}
+
+
+hscRecomp dflags 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
+
+ -------------------
+ -- PARSE
+ -------------------
+ ; maybe_parsed <- myParseModule dflags (unJust (ml_hspp_file location) "hscRecomp:hspp")
+ ; case maybe_parsed of {
+ Nothing -> return (HscFail pcs_ch);
+ Just rdr_module -> do {
+ ; let this_mod = mkModuleInThisPackage (hsModuleName rdr_module)
+
+ -------------------
+ -- RENAME
+ -------------------
+ ; (pcs_rn, maybe_rn_result)
+ <- 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 {
+
+ -------------------
+ -- TYPECHECK
+ -------------------
+ ; maybe_tc_result <- 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 (pcs_tc, tc_result) -> do {
+
+ ; let env_tc = tc_env tc_result
+ local_insts = tc_insts tc_result
+
+ -------------------
+ -- DESUGAR, SIMPLIFY, TIDY-CORE
+ -------------------
+ -- We grab the the unfoldings at this point.
+ ; simpl_result <- dsThenSimplThenTidy dflags pcs_tc hst this_mod
+ print_unqualified is_exported tc_result
+ ; let (tidy_binds, orphan_rules, foreign_stuff) = simpl_result
+
+ -------------------
+ -- CONVERT TO STG
+ -------------------
+ ; (stg_binds, oa_tidy_binds, cost_centre_info, top_level_ids)
+ <- myCoreToStg dflags this_mod tidy_binds
+
+
+ -------------------
+ -- BUILD THE NEW ModDetails AND ModIface
+ -------------------
+ ; 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
+
+ -------------------
+ -- 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)
+
+ -- and the answer is ...
+ ; return (HscOK new_details (Just final_iface)
+ maybe_stub_h_filename maybe_stub_c_filename
+ maybe_ibinds pcs_tc)
+ }}}}}}}
+
+
+
+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"
+
+ buf <- hGetStringBuffer True{-expand tabs-} src_filename
+
+ let glaexts | dopt Opt_GlasgowExts dflags = 1#
+ | otherwise = 0#
+
+ case parse buf PState{ bol = 0#, atbol = 1#,
+ context = [], glasgow_exts = glaexts,
+ loc = mkSrcLoc (_PK_ src_filename) 1 } of {
+
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ return Nothing };
+
+ POk _ (PModule 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)
+ }}
+
+
+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 pcs hst this_mod print_unqual is_exported tc_result
+ = do -------------------------- Desugaring ----------------
+ -- _scc_ "DeSugar"
+ (desugared, rules, h_code, c_code, fe_binders)
+ <- deSugar dflags pcs hst this_mod print_unqual tc_result
+
+ -------------------------- Main Core-language transformations ----------------
+ -- _scc_ "Core2Core"
+ (simplified, orphan_rules)
+ <- core2core dflags pcs 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 ()
+ -- TEMP: the above call zaps some space usage allocated by the
+ -- simplifier, which for reasons I don't understand, persists
+ -- thoroughout code generation
+
+ showPass dflags "Core2Stg"
+ -- _scc_ "Core2Stg"
+ let stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_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)
+
+ return (stg_binds2, occ_anal_tidy_binds, cost_centre_info, final_ids)
+\end{code}
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
- dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
+%************************************************************************
+%* *
+\subsection{Compiling an expression}
+%* *
+%************************************************************************
- dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
- (ppSourceStats False rdr_module) >>
+hscExpr
+ :: DynFlags
+ -> HomeSymbolTable
+ -> HomeIfaceTable
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> Module -- Context for compiling
+ -> String -- The expression
+ -> IO HscResult
- -- 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
+hscExpr dflags hst hit pcs this_module expr
+ = do { -- Parse it
+ let unqual = unQualInScope
+ ; maybe_parsed <- myParseExpr dflags expr
+ ; case maybe_parsed of {
+ Nothing -> return (HscFail pcs_ch);
+ Just parsed_expr -> do {
+
+ -- Rename it
+ (new_pcs, maybe_renamed_expr) <- renameExpr dflags hit hst pcs this_module parsed_expr ;
+ ; case maybe_renamed_expr of {
+ Nothing -> FAIL
+ Just (print_unqual, rn_expr) ->
+
+ -- Typecheck it
+ maybe_tc_expr <- typecheckExpr dflags pcs hst print_unqual rn_expr
+ ; case maybe_tc_expr of
+ Nothing -> FAIL
+ Just tc_expr ->
+
+ -- Desugar it
+ ; ds_expr <- deSugarExpr dflags pcs hst this_module print_unqual tc_expr
+
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags pcs hst ds_expr
- -------------------------- Rename ----------------
- show_pass "Renamer" >>
- _scc_ "Renamer"
+ ; return I'M NOT SURE
+ }
- 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
-
-
- -------------------------- Typechecking ----------------
- show_pass "TypeCheck" >>
- _scc_ "TypeCheck"
- typecheckModule dflags mod pcs hst hit pit rn_mod
- -- tc_uniqs rn_name_supply
- -- fixity_env rn_mod
- >>= \ maybe_tc_stuff ->
- case maybe_tc_stuff of {
- Nothing -> ghcExit 1; -- Type checker failed
-
- Just (tc_results@(TcResults {tc_tycons = local_tycons,
- tc_classes = local_classes,
- tc_insts = inst_info })) ->
-
-
- -------------------------- Desugaring ----------------
- _scc_ "DeSugar"
- deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
-
-
- -------------------------- Main Core-language transformations ----------------
- _scc_ "Core2Core"
- core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
-
- -- Do the final tidy-up
- tidyCorePgm tidy_uniqs this_mod
- simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
-
- -- 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
-
-
-
- -------------------------- Convert to STG code -------------------------------
- show_pass "Core2Stg" >>
- _scc_ "Core2Stg"
- let
- stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
- in
-
- -------------------------- Simplify STG code -------------------------------
- show_pass "Stg2Stg" >>
- _scc_ "Stg2Stg"
- stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
-
-#ifdef GHCI
- runStgI local_tycons local_classes
- (map fst stg_binds2) >>= \ i_result ->
- putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
- >>
-
-#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)) >>
-
-#endif
-
-
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
-\end{code}
%************************************************************************
%************************************************************************
\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 ns <- mkSplitUniqSupply 'r'
+ return (
+ PRS { prsOrig = Orig { origNames = initOrigNames,
+ origIParam = emptyFM },
+ prsDecls = (emptyNameEnv, 0),
+ prsInsts = (emptyBag, 0),
+ prsRules = (emptyBag, 0),
+ prsNS = ns
+ }
+ )
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
+
+
+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