%
% (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, initPersistentCompilerState
+#ifdef GHCI
+ , hscStmt, hscTcExpr, hscThing,
+ , compileExpr
+#endif
+ ) where
#include "HsVersions.h"
-import IO ( hPutStr, stderr )
+#ifdef GHCI
+import TcHsSyn ( TypecheckedHsExpr )
+import CodeOutput ( outputForeignStubs )
+import ByteCodeGen ( byteCodeGen, coreExprToBCOs )
+import Linker ( HValue, linkExpr )
+import TidyPgm ( tidyCoreExpr )
+import CorePrep ( corePrepExpr )
+import Flattening ( flattenExpr )
+import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnThing )
+import RdrHsSyn ( RdrNameStmt )
+import Type ( Type )
+import PrelNames ( iNTERACTIVE )
+import StringBuffer ( stringToStringBuffer )
+import SrcLoc ( noSrcLoc )
+import Name ( Name )
+import CoreLint ( lintUnfolding )
+#endif
+
import HsSyn
-import RdrHsSyn ( RdrNameHsModule )
-import FastString ( unpackFS )
-import StringBuffer ( hGetStringBuffer )
-import Parser ( parse )
-import Lex ( PState(..), ParseResult(..) )
+import RdrName ( nameRdrName )
+import StringBuffer ( hGetStringBuffer, freeStringBuffer )
+import Parser
+import Lex ( ParseResult(..), ExtFlags(..), mkPState )
import SrcLoc ( mkSrcLoc )
-
-import Rename ( renameModule )
-
-import PrelInfo ( wiredInThings )
+import TcRnDriver ( checkOldIface, tcRnModule, tcRnExtCore, tcRnIface )
+import RnEnv ( extendOrigNameCache )
+import PrelInfo ( wiredInThingEnv, knownKeyNames )
import PrelRules ( builtinRules )
-import MkIface ( writeIface )
-import TcModule ( TcResults(..), typecheckModule )
-import Desugar ( deSugar )
-import SimplCore ( core2core )
-import OccurAnal ( occurAnalyseBinds )
+import MkIface ( mkIface )
+import Desugar
+import Flattening ( flatten )
+import SimplCore
import CoreUtils ( coreBindsSize )
-import CoreTidy ( tidyCorePgm )
-import CoreToStg ( topCoreBindsToStg )
-import StgSyn ( collectFinalStgBinders )
+import TidyPgm ( tidyCorePgm )
+import CorePrep ( corePrepPgm )
+import StgSyn
+import CoreToStg ( coreToStg )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleNameUserString )
+import Module ( emptyModuleEnv )
import CmdLineOpts
-import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
+import DriverPhases ( isExtCore_file )
+import ErrUtils ( dumpIfSet_dyn, showPass )
import UniqSupply ( mkSplitUniqSupply )
+import Bag ( consBag, emptyBag )
import Outputable
-import Char ( isSpace )
-import StgInterp ( runStgI )
import HscStats ( ppSourceStats )
+import HscTypes
+import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
+import FiniteMap ( emptyFM )
+import Name ( nameModule )
+import NameEnv ( emptyNameEnv )
+import NameSet ( emptyNameSet )
+import Module ( Module, ModLocation(..), showModMsg )
+import FastString
+import Maybes ( expectJust )
+
+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]) -- interpreted code, if any
- PersistentCompilerState -- updated PCS
- (Bag WarnMsg) -- warnings
-
- | HscErrs PersistentCompilerState -- updated PCS
- (Bag ErrMsg) -- errors
- (Bag WarnMsg) -- warnings
+ -- compilation failed
+ = HscFail PersistentCompilerState -- updated PCS
+ -- concluded that it wasn't necessary
+ | HscNoRecomp PersistentCompilerState -- updated PCS
+ ModDetails -- new details (HomeSymbolTable additions)
+ ModIface -- new iface (if any compilation was done)
+ -- did recompilation
+ | HscRecomp PersistentCompilerState -- updated PCS
+ ModDetails -- new details (HomeSymbolTable additions)
+ ModIface -- new iface (if any compilation was done)
+ Bool -- stub_h exists
+ Bool -- stub_c exists
+ (Maybe CompiledByteCode)
+
+ -- 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.)
- -> HomeSymbolTable -- for home module ModDetails
+ :: HscEnv
-> PersistentCompilerState -- IN: persistent compiler state
+ -> Module
+ -> ModLocation -- location info
+ -> Bool -- True <=> source unchanged
+ -> Bool -- True <=> have an object file (for msgs only)
+ -> Maybe ModIface -- old interface, if available
-> IO HscResult
-hscMain dflags core_cmds stg_cmds summary maybe_old_iface
- output_filename mod_details pcs1
- = do
- source_unchanged :: Bool -- extracted from summary?
-
- (pcs2, check_errs, (recomp_reqd, maybe_checked_iface))
- <- checkOldIface dflags finder hit hst pcs1 mod source_unchanged
- maybe_old_iface
-
- -- test check_errs and give up if a problem happened
- what_next = if recomp_reqd then hscRecomp else hscNoRecomp
-
- return $
- what_next dflags core_cmds stg_cmds summary hit hst
- pcs2 maybe_checked_iface
-
-hscNoRecomp = panic "hscNoRecomp"
+hscMain hsc_env pcs mod location
+ source_unchanged have_object maybe_old_iface
+ = do {
+ (pcs_ch, maybe_chk_result) <- _scc_ "checkOldIface"
+ checkOldIface hsc_env pcs mod
+ (ml_hi_file location)
+ source_unchanged maybe_old_iface;
+ case maybe_chk_result of {
+ Nothing -> return (HscFail pcs_ch) ;
+ Just (recomp_reqd, maybe_checked_iface) -> do {
+
+ let no_old_iface = not (isJust maybe_checked_iface)
+ what_next | recomp_reqd || no_old_iface = hscRecomp
+ | otherwise = hscNoRecomp
+
+ ; what_next hsc_env pcs_ch have_object
+ mod location maybe_checked_iface
+ }}}
+
+
+-- hscNoRecomp definitely expects to have the old interface available
+hscNoRecomp hsc_env pcs_ch have_object
+ mod location (Just old_iface)
+ | hsc_mode hsc_env == OneShot
+ = do {
+ when (verbosity (hsc_dflags hsc_env) > 0) $
+ hPutStrLn stderr "compilation IS NOT required";
+ let { bomb = panic "hscNoRecomp:OneShot" };
+ return (HscNoRecomp pcs_ch bomb bomb)
+ }
+ | otherwise
+ = do {
+ when (verbosity (hsc_dflags hsc_env) >= 1) $
+ hPutStrLn stderr ("Skipping " ++
+ showModMsg have_object mod location);
+
+ -- Typecheck
+ (pcs_tc, maybe_tc_result) <- tcRnIface hsc_env pcs_ch old_iface ;
+
+ case maybe_tc_result of {
+ Nothing -> return (HscFail pcs_tc);
+ Just new_details ->
+
+ return (HscNoRecomp pcs_tc new_details old_iface)
+ }}
+
+hscRecomp hsc_env pcs_ch have_object
+ mod location maybe_checked_iface
+ = do {
+ -- what target are we shooting for?
+ ; let one_shot = hsc_mode hsc_env == OneShot
+ ; let dflags = hsc_dflags hsc_env
+ ; let toInterp = dopt_HscLang dflags == HscInterpreted
+ ; let toCore = isJust (ml_hs_file location) &&
+ isExtCore_file (fromJust (ml_hs_file location))
+
+ ; when (not one_shot && verbosity dflags >= 1) $
+ hPutStrLn stderr ("Compiling " ++
+ showModMsg (not toInterp) mod location);
+
+ ; front_res <- if toCore then
+ hscCoreFrontEnd hsc_env pcs_ch location
+ else
+ hscFrontEnd hsc_env pcs_ch location
+
+ ; case front_res of
+ Left flure -> return flure;
+ Right (pcs_tc, ds_result) -> do {
+
+
+ -- OMITTED:
+ -- ; seqList imported_modules (return ())
+
+ -------------------
+ -- FLATTENING
+ -------------------
+ ; flat_result <- _scc_ "Flattening"
+ flatten hsc_env pcs_tc ds_result
+
+
+ ; let -- Rule-base accumulated from imported packages
+ pkg_rule_base = eps_rule_base (pcs_EPS pcs_tc)
+
+ -- In one-shot mode, ZAP the external package state at
+ -- this point, because we aren't going to need it from
+ -- now on. We keep the name cache, however, because
+ -- tidyCore needs it.
+ pcs_middle
+ | one_shot = pcs_tc{ pcs_EPS = error "pcs_EPS missing" }
+ | otherwise = pcs_tc
+
+ ; pkg_rule_base `seq` pcs_middle `seq` return ()
+
+ -- alive at this point:
+ -- pcs_middle
+ -- flat_result
+ -- pkg_rule_base
+
+ -------------------
+ -- SIMPLIFY
+ -------------------
+ ; simpl_result <- _scc_ "Core2Core"
+ core2core hsc_env pkg_rule_base flat_result
+
+ -------------------
+ -- TIDY
+ -------------------
+ ; (pcs_simpl, tidy_result)
+ <- _scc_ "CoreTidy"
+ tidyCorePgm dflags pcs_middle simpl_result
+
+ -- ZAP the persistent compiler state altogether now if we're
+ -- in one-shot mode, to save space.
+ ; pcs_final <- if one_shot then return (error "pcs_final missing")
+ else return pcs_simpl
+
+ ; emitExternalCore dflags tidy_result
+
+ -- Alive at this point:
+ -- tidy_result, pcs_final
+ -- hsc_env
+
+ -------------------
+ -- BUILD THE NEW ModIface and ModDetails
+ -- and emit external core if necessary
+ -- This has to happen *after* code gen so that the back-end
+ -- info has been set. Not yet clear if it matters waiting
+ -- until after code output
+ ; new_iface <- _scc_ "MkFinalIface"
+ mkIface hsc_env location
+ maybe_checked_iface tidy_result
+
+
+ -- Space leak reduction: throw away the new interface if
+ -- we're in one-shot mode; we won't be needing it any
+ -- more.
+ ; final_iface <-
+ if one_shot then return (error "no final iface")
+ else return new_iface
+
+ -- Build the final ModDetails (except in one-shot mode, where
+ -- we won't need this information after compilation).
+ ; final_details <-
+ if one_shot then return (error "no final details")
+ else return $! ModDetails {
+ md_types = mg_types tidy_result,
+ md_insts = mg_insts tidy_result,
+ md_rules = mg_rules tidy_result }
+
+ -------------------
+ -- CONVERT TO STG and COMPLETE CODE GENERATION
+ ; (stub_h_exists, stub_c_exists, maybe_bcos)
+ <- hscBackEnd dflags tidy_result
+
+ -- and the answer is ...
+ ; return (HscRecomp pcs_final
+ final_details
+ final_iface
+ stub_h_exists stub_c_exists
+ maybe_bcos)
+ }}
+
+hscCoreFrontEnd hsc_env pcs_ch location = 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 {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ ; (pcs_tc, maybe_tc_result) <- _scc_ "TypeCheck"
+ tcRnExtCore hsc_env pcs_ch rdr_module
+ ; case maybe_tc_result of {
+ Nothing -> return (Left (HscFail pcs_tc));
+ Just mod_guts -> return (Right (pcs_tc, mod_guts))
+ -- No desugaring to do!
+ }}}
+
+
+hscFrontEnd hsc_env pcs_ch location = do {
+ -------------------
+ -- PARSE
+ -------------------
+ ; maybe_parsed <- myParseModule (hsc_dflags hsc_env)
+ (expectJust "hscFrontEnd:hspp" (ml_hspp_file location))
+
+ ; case maybe_parsed of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just rdr_module -> do {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ ; (pcs_tc, maybe_tc_result) <- _scc_ "Typecheck-Rename"
+ tcRnModule hsc_env pcs_ch rdr_module
+ ; case maybe_tc_result of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just tc_result -> do {
+
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; ds_result <- _scc_ "DeSugar"
+ deSugar hsc_env pcs_tc tc_result
+ ; return (Right (pcs_tc, ds_result))
+ }}}}}
+
+
+hscBackEnd dflags
+ ModGuts{ -- This is the last use of the ModGuts in a compilation.
+ -- From now on, we just use the bits we need.
+ mg_module = this_mod,
+ mg_binds = core_binds,
+ mg_types = type_env,
+ mg_dir_imps = dir_imps,
+ mg_foreign = foreign_stubs,
+ mg_deps = dependencies } = do {
+
+ -------------------
+ -- PREPARE FOR CODE GENERATION
+ -- Do saturation and convert to A-normal form
+ prepd_binds <- _scc_ "CorePrep"
+ corePrepPgm dflags core_binds type_env;
+
+ case dopt_HscLang dflags of
+ HscNothing -> return (False, False, Nothing)
+
+ HscInterpreted ->
+#ifdef GHCI
+ do ----------------- Generate byte code ------------------
+ comp_bc <- byteCodeGen dflags prepd_binds type_env
+
+ ------------------ Create f-x-dynamic C-side stuff ---
+ (istub_h_exists, istub_c_exists)
+ <- outputForeignStubs dflags foreign_stubs
+
+ return ( istub_h_exists, istub_c_exists, Just comp_bc )
+#else
+ panic "GHC not compiled with interpreter"
+#endif
-hscRecomp dflags core_cmds stg_cmds summary hit hst pcs maybe_old_iface
- = do
- -- parsed :: RdrNameHsModule
- parsed <- parseModule summary
- -- check for parse errors
+ other ->
+ do
+ ----------------- Convert to STG ------------------
+ (stg_binds, cost_centre_info) <- _scc_ "CoreToStg"
+ myCoreToStg dflags this_mod prepd_binds
- (pcs_rn, maybe_rn_result)
- <- renameModule dflags finder hit hst pcs mod parsed
+ ------------------ Code generation ------------------
+ abstractC <- _scc_ "CodeGen"
+ codeGen dflags this_mod type_env foreign_stubs
+ dir_imps cost_centre_info stg_binds
- -- check maybe_rn_result for failure
+ ------------------ Code output -----------------------
+ (stub_h_exists, stub_c_exists)
+ <- codeOutput dflags this_mod foreign_stubs
+ dependencies abstractC
- (new_iface, rn_hs_decls) = unJust maybe_rn_result
+ return (stub_h_exists, stub_c_exists, Nothing)
+ }
- maybe_tc_result
- <- typecheckModule dflags mod pcs hst hit pit rn_hs_decls
- -- check maybe_tc_result for failure
- let tc_result = unJust maybe_tc_result
- let tc_pcs = tc_pcs tc_result
- let tc_env = tc_env tc_result
- let tc_binds = tc_binds tc_result
+myParseModule dflags src_filename
+ = do -------------------------- Parser ----------------
+ showPass dflags "Parser"
+ _scc_ "Parser" do
+ buf <- hGetStringBuffer src_filename
- -- desugar, simplify and tidy, to create the unfoldings
- -- why is this IO-typed?
- (core_binds, orphan_rules)
- <- dsThenSimplThenTidy dflags mod tc_binds rule_base
+ 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
- -- convert to Stg; needed for binders
- let (stg_binds, top_level_ids) = myCoreToStg core_binds
- -- myCoreToStg does occurAnalyseBinds,
- -- `seq`, topCoreBindsToStg
+ case parseModule buf (mkPState loc exts) of {
- -- cook up a new ModDetails now we (finally) have all the bits
- let new_details = completeModDetails tc_env core_binds top_level_ids orphan_rules
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ freeStringBuffer buf;
+ return Nothing };
- -- and possibly create a new ModIface
- let maybe_final_iface = completeIface maybe_old_iface new_iface new_details
+ POk _ rdr_module -> do {
- -- do the rest of code generation/emission
- (unlinkeds, stub_h_filename, stub_c_filename) <- restOfCodeGeneration stg_binds
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_module) ;
+
+ dumpIfSet_dyn dflags Opt_D_source_stats "Source Statistics"
+ (ppSourceStats False rdr_module) ;
+
+ return (Just rdr_module)
+ -- ToDo: free the string buffer later.
+ }}
- -- and the answer is ...
- return (HscOK new_details maybe_final_iface stub_h_filename stub_c_filename
- unlinkeds tc_pcs (unionBags rn_warns tc_warns))
+myCoreToStg dflags this_mod prepd_binds
+ = do
+ stg_binds <- _scc_ "Core2Stg"
+ coreToStg dflags prepd_binds
-#if 0
--- BEGIN old stuff
- -------------------------- Reader ----------------
- show_pass "Parser" >>
- _scc_ "Parser"
+ (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
+ stg2stg dflags this_mod stg_binds
- 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)
+ return (stg_binds2, cost_centre_info)
+\end{code}
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+%************************************************************************
+%* *
+\subsection{Compiling a do-statement}
+%* *
+%************************************************************************
- case parse buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc src_filename 1 } of {
+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.
- PFailed err -> return (HscErrs pcs (unitBag err) emptyBag)
+A naked expression returns a singleton Name [it].
- POk _ rdr_module@(HsModule mod_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,...]
- dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
+ pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
- dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
- (ppSourceStats False rdr_module) >>
+ expr (of IO type) ==> expr >>= \ v -> return [v]
+ [NB: result not printed] bindings: [it]
+
- -- UniqueSupplies for later use (these are the only lower case uniques)
- mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
- mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
- mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
- mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
- mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
+ expr (of non-IO type,
+ result showable) ==> let v = expr in print v >> return [v]
+ bindings: [it]
- -------------------------- Rename ----------------
- show_pass "Renamer" >>
- _scc_ "Renamer"
+ expr (of non-IO type,
+ result not showable) ==> error
- renameModule dflags finder pcs hst rdr_module
- >>= \ (pcs_rn, 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
+\begin{code}
+#ifdef GHCI
+hscStmt -- Compile a stmt all the way to an HValue, but don't run it
+ :: HscEnv
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> InteractiveContext -- Context for compiling
+ -> String -- The statement
+ -> IO ( PersistentCompilerState,
+ Maybe (InteractiveContext, [Name], HValue) )
+
+hscStmt hsc_env pcs icontext stmt
+ = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) stmt
+ ; case maybe_stmt of {
+ Nothing -> return (pcs, Nothing) ;
+ Just parsed_stmt -> do {
+
+ -- Rename and typecheck it
+ (pcs1, maybe_tc_result)
+ <- tcRnStmt hsc_env pcs icontext parsed_stmt
+
+ ; case maybe_tc_result of {
+ Nothing -> return (pcs1, Nothing) ;
+ Just (new_ic, bound_names, tc_expr) -> do {
+
+ -- Then desugar, code gen, and link it
+ ; hval <- compileExpr hsc_env pcs1 iNTERACTIVE
+ (ic_rn_gbl_env new_ic)
+ (ic_type_env new_ic)
+ tc_expr
+
+ ; return (pcs1, Just (new_ic, bound_names, hval))
+ }}}}}
+
+hscTcExpr -- Typecheck an expression (but don't run it)
+ :: HscEnv
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> InteractiveContext -- Context for compiling
+ -> String -- The expression
+ -> IO (PersistentCompilerState, Maybe Type)
+
+hscTcExpr hsc_env pcs icontext expr
+ = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) expr
+ ; case maybe_stmt of {
+ Just (ExprStmt expr _ _)
+ -> tcRnExpr hsc_env pcs icontext expr ;
+ Just other -> do { hPutStrLn stderr ("not an expression: `" ++ expr ++ "'") ;
+ return (pcs, Nothing) } ;
+ Nothing -> return (pcs, Nothing) } }
+\end{code}
+\begin{code}
+hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
+hscParseStmt dflags str
+ = do showPass dflags "Parser"
+ _scc_ "Parser" do
- -------------------------- 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
+ buf <- stringToStringBuffer str
- Just (tc_results@(TcResults {tc_tycons = local_tycons,
- tc_classes = local_classes,
- tc_insts = inst_info })) ->
+ 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 (mkPState loc exts) of {
- -------------------------- Desugaring ----------------
- _scc_ "DeSugar"
- deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
+ 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;
- -------------------------- Main Core-language transformations ----------------
- _scc_ "Core2Core"
- core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
+ POk _ (Just rdr_stmt) -> do {
- -- Do the final tidy-up
- tidyCorePgm this_mod
- simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
+ --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}
- -- 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
+%************************************************************************
+%* *
+\subsection{Getting information about an identifer}
+%* *
+%************************************************************************
- 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
+\begin{code}
+#ifdef GHCI
+hscThing -- like hscStmt, but deals with a single identifier
+ :: HscEnv
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> InteractiveContext -- Context for compiling
+ -> String -- The identifier
+ -> IO ( PersistentCompilerState,
+ [TyThing] )
+
+hscThing hsc_env pcs0 ic str
+ = do let dflags = hsc_dflags hsc_env
+
+ maybe_rdr_name <- myParseIdentifier dflags str
+ case maybe_rdr_name of {
+ Nothing -> return (pcs0, []);
+ Just rdr_name -> do
+
+ (pcs1, maybe_tc_result) <-
+ tcRnThing hsc_env pcs0 ic rdr_name
+
+ case maybe_tc_result of {
+ Nothing -> return (pcs1, []) ;
+ Just things -> return (pcs1, things)
+ }}
+
+myParseIdentifier dflags str
+ = do buf <- stringToStringBuffer str
+
+ 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 (mkPState loc exts) 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}
+%************************************************************************
+%* *
+ Desugar, simplify, convert to bytecode, and link an expression
+%* *
+%************************************************************************
+\begin{code}
+#ifdef GHCI
+compileExpr :: HscEnv
+ -> PersistentCompilerState
+ -> Module -> GlobalRdrEnv -> TypeEnv
+ -> TypecheckedHsExpr
+ -> IO HValue
+
+compileExpr hsc_env pcs this_mod rdr_env type_env tc_expr
+ = do { let { dflags = hsc_dflags hsc_env ;
+ lint_on = dopt Opt_DoCoreLinting dflags }
+
+ -- Desugar it
+ ; ds_expr <- deSugarExpr hsc_env pcs this_mod rdr_env type_env tc_expr
+
+ -- Flatten it
+ ; flat_expr <- flattenExpr hsc_env pcs ds_expr
- -------------------------- Convert to STG code -------------------------------
- show_pass "Core2Stg" >>
- _scc_ "Core2Stg"
- let
- stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
- in
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags flat_expr
- -------------------------- Simplify STG code -------------------------------
- show_pass "Stg2Stg" >>
- _scc_ "Stg2Stg"
- stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; tidy_expr <- tidyCoreExpr simpl_expr
-#ifdef GHCI
- runStgI local_tycons local_classes
- (map fst stg_binds2) >>= \ i_result ->
- putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
- >>
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
-#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)) >>
+ -- Lint if necessary
+ -- ToDo: improve SrcLoc
+ ; if lint_on then
+ case lintUnfolding noSrcLoc [] prepd_expr of
+ Just err -> pprPanic "compileExpr" err
+ Nothing -> return ()
+ else
+ return ()
-#endif
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
+ -- link it
+ ; hval <- linkExpr hsc_env pcs bcos
- ghcExit 0
- } }
- where
- -------------------------------------------------------------
- -- ****** help functions:
-
- show_pass
- = if opt_D_show_passes
- then \ what -> hPutStr stderr ("*** "++what++":\n")
- else \ what -> return ()
--- END old stuff
+ ; return hval
+ }
#endif
\end{code}
\begin{code}
initPersistentCompilerState :: IO PersistentCompilerState
initPersistentCompilerState
-<<<<<<< HscMain.lhs
- = do prs <- initPersistentRenamerState
- return (
- PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleEnv,
- pcs_PRS = initPersistentRenamerState
- }
- )
-=======
- = PCS { pcs_PST = initPackageDetails,
- pcs_insts = emptyInstEnv,
- pcs_rules = initRules,
- pcs_PRS = initPersistentRenamerState }
->>>>>>> 1.12
-
-initPackageDetails :: PackageSymbolTable
-initPackageDetails = extendTypeEnv emptyModuleEnv wiredInThings
-
-initPersistentRenamerState :: IO PersistentRenamerState
- = do ns <- mkSplitUniqSupply 'r'
+ = do nc <- initNameCache
return (
- PRS { prsOrig = Orig { origNames = initOrigNames,
- origIParam = emptyFM },
- prsDecls = emptyNameEnv,
- prsInsts = emptyBag,
- prsRules = emptyBag,
- 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
-
-
-initRules :: RuleEnv
-initRules = foldl add emptyVarEnv builtinRules
- where
- add env (name,rule) = extendNameEnv_C add1 env name [rule]
- add1 rules _ = rule : rules
-\end{code}
-
-
-
-\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
- }
+ PCS { pcs_EPS = initExternalPackageState,
+ pcs_nc = nc })
+
+initNameCache :: IO NameCache
+ = do us <- mkSplitUniqSupply 'r'
+ return (NameCache { nsUniqs = us,
+ nsNames = initOrigNames,
+ nsIPs = emptyFM })
+
+initExternalPackageState :: ExternalPackageState
+initExternalPackageState
+ = emptyExternalPackageState {
+ eps_rules = foldr add_rule (emptyBag, 0) builtinRules,
+ eps_PTE = wiredInThingEnv,
+ }
where
- full_new_iface = completeIface new_iface local_tycons local_classes
- inst_info final_ids tidy_binds
- tidy_orphan_rules
+ add_rule (name,rule) (rules, n_slurped)
+ = (gated_decl `consBag` rules, n_slurped)
+ where
+ gated_decl = (gate_fn, (mod, IfaceRuleOut rdr_name rule))
+ mod = nameModule name
+ rdr_name = nameRdrName name -- Seems a bit of a hack to go back
+ -- to the RdrName
+ gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible
+
+initOrigNames :: OrigNameCache
+initOrigNames = foldl extendOrigNameCache emptyModuleEnv knownKeyNames
\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{Printing the interface}
-%* *
-%************************************************************************
-
-\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}
-
-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
-
-\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}
-
-
-\begin{code}
-pprUsage :: ImportVersion OccName -> SDoc
-pprUsage (m, has_orphans, is_boot, whats_imported)
- = hsep [ptext SLIT("import"), pprModuleName 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 ]
-\end{code}
-
-
-\begin{code}
-pprFixities [] = empty
-pprFixities fixes = hsep (map ppr fixes) <> semi
-
-pprRules [] = empty
-pprRules rules = hsep [ptext SLIT("{-## __R"), hsep (map ppr rules), ptext SLIT("##-}")]
-
-pprDeprecs [] = empty
-pprDeprecs deps = hsep [ ptext SLIT("{-## __D"), guts, ptext SLIT("##-}")]
- where
- guts = hsep [ ppr ie <+> doubleQuotes (ppr txt) <> semi
- | Deprecation ie txt _ <- deps ]
-\end{code}
-
-
projects / ghc-hetmet.git / blobdiff