\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( HscResult(..), hscMain,
+module HscMain (
+ HscResult(..), hscMain, newHscEnv
#ifdef GHCI
- hscStmt, hscThing, hscModuleContents,
+ , hscStmt, hscTcExpr, hscThing,
+ , compileExpr
#endif
- initPersistentCompilerState ) where
+ ) where
#include "HsVersions.h"
#ifdef GHCI
-import Interpreter
-import ByteCodeGen ( byteCodeGen )
+import HsSyn ( Stmt(..), LStmt, LHsExpr )
+import IfaceSyn ( IfaceDecl )
+import CodeOutput ( outputForeignStubs )
+import ByteCodeGen ( byteCodeGen, coreExprToBCOs )
+import Linker ( HValue, linkExpr )
import TidyPgm ( tidyCoreExpr )
import CorePrep ( corePrepExpr )
-import Rename ( renameStmt, renameRdrName, slurpIface )
-import RdrName ( rdrNameOcc, setRdrNameOcc )
-import RdrHsSyn ( RdrNameStmt )
-import OccName ( dataName, tcClsName,
- occNameSpace, setOccNameSpace )
+import Flattening ( flattenExpr )
+import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnThing )
+import RdrName ( RdrName, GlobalRdrEnv )
import Type ( Type )
-import Id ( Id, idName, setGlobalIdDetails )
-import IdInfo ( GlobalIdDetails(VanillaGlobal) )
-import Name ( isInternalName )
-import NameEnv ( lookupNameEnv )
-import Module ( lookupModuleEnv )
-import RdrName ( rdrEnvElts )
import PrelNames ( iNTERACTIVE )
import StringBuffer ( stringToStringBuffer )
-import Maybes ( catMaybes )
-
-import List ( nub )
+import SrcLoc ( noSrcLoc, Located(..) )
+import Var ( Id )
+import Name ( Name )
+import CoreLint ( lintUnfolding )
+import DsMeta ( templateHaskellNames )
+import BasicTypes ( Fixity )
#endif
-import HsSyn
-
-import RdrName ( mkRdrOrig )
-import Id ( idName )
-import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
-import StringBuffer ( hGetStringBuffer, freeStringBuffer )
+import StringBuffer ( hGetStringBuffer )
import Parser
-import Lex ( ParseResult(..), ExtFlags(..), mkPState )
+import Lexer ( P(..), ParseResult(..), mkPState )
import SrcLoc ( mkSrcLoc )
-import Finder ( findModule )
-import Rename ( checkOldIface, renameModule, renameExtCore,
- closeIfaceDecls, RnResult(..) )
-import Rules ( emptyRuleBase )
-import PrelInfo ( wiredInThingEnv, wiredInThings )
-import PrelRules ( builtinRules )
-import PrelNames ( knownKeyNames, gHC_PRIM_Name )
-import MkIface ( mkFinalIface )
-import TcModule
-import InstEnv ( emptyInstEnv )
+import TcRnDriver ( tcRnModule, tcRnExtCore )
+import TcIface ( typecheckIface )
+import IfaceEnv ( initNameCache )
+import LoadIface ( ifaceStats, initExternalPackageState )
+import PrelInfo ( wiredInThings, basicKnownKeyNames )
+import RdrName ( GlobalRdrEnv )
+import MkIface ( checkOldIface, mkIface )
import Desugar
-import Flattening ( flatten, flattenExpr )
+import Flattening ( flatten )
import SimplCore
-import CoreUtils ( coreBindsSize )
import TidyPgm ( tidyCorePgm )
import CorePrep ( corePrepPgm )
-import StgSyn
import CoreToStg ( coreToStg )
+import Name ( Name, NamedThing(..) )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
-import CodeOutput ( codeOutput, outputForeignStubs )
+import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleName, mkHomeModule )
import CmdLineOpts
-import DriverState ( v_HCHeader )
-import DriverPhases ( isExtCore_file )
-import ErrUtils ( dumpIfSet_dyn, showPass, printError )
+import DriverPhases ( isExtCoreFilename )
+import ErrUtils ( dumpIfSet, dumpIfSet_dyn, showPass, printError )
import UniqSupply ( mkSplitUniqSupply )
-import Bag ( consBag, emptyBag )
import Outputable
import HscStats ( ppSourceStats )
import HscTypes
-import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
-import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName )
-import NameEnv ( emptyNameEnv, mkNameEnv )
-import Module ( Module )
+import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
+import Module ( Module, ModLocation(..), showModMsg )
import FastString
import Maybes ( expectJust )
-import Util ( seqList )
-
-import IOExts ( newIORef, readIORef, writeIORef,
- unsafePerformIO )
import Monad ( when )
import Maybe ( isJust, fromJust )
import IO
+import DATA_IOREF ( newIORef, readIORef )
+\end{code}
-import MkExternalCore ( emitExternalCore )
-import ParserCore
-import ParserCoreUtils
+%************************************************************************
+%* *
+ Initialisation
+%* *
+%************************************************************************
+
+\begin{code}
+newHscEnv :: GhciMode -> DynFlags -> IO HscEnv
+newHscEnv ghci_mode dflags
+ = do { eps_var <- newIORef initExternalPackageState
+ ; us <- mkSplitUniqSupply 'r'
+ ; nc_var <- newIORef (initNameCache us knownKeyNames)
+ ; return (HscEnv { hsc_mode = ghci_mode,
+ hsc_dflags = dflags,
+ hsc_HPT = emptyHomePackageTable,
+ hsc_EPS = eps_var,
+ hsc_NC = nc_var } ) }
+
+
+knownKeyNames :: [Name] -- Put here to avoid loops involving DsMeta,
+ -- where templateHaskellNames are defined
+knownKeyNames = map getName wiredInThings
+ ++ basicKnownKeyNames
+#ifdef GHCI
+ ++ templateHaskellNames
+#endif
\end{code}
%************************************************************************
%* *
-\subsection{The main compiler pipeline}
+ The main compiler pipeline
%* *
%************************************************************************
\begin{code}
data HscResult
- -- compilation failed
- = HscFail PersistentCompilerState -- updated PCS
- -- concluded that it wasn't necessary
- | HscNoRecomp PersistentCompilerState -- updated PCS
- ModDetails -- new details (HomeSymbolTable additions)
+ -- Compilation failed
+ = HscFail
+
+ -- Concluded that it wasn't necessary
+ | HscNoRecomp 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)
+
+ -- Did recompilation
+ | HscRecomp ModDetails -- new details (HomeSymbolTable additions)
+ (Maybe GlobalRdrEnv)
+ 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
+ (Maybe CompiledByteCode)
-- no errors or warnings; the individual passes
-- (parse/rename/typecheck) print messages themselves
hscMain
- :: GhciMode
- -> DynFlags
+ :: HscEnv
-> Module
- -> ModuleLocation -- location info
+ -> ModLocation -- 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 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))
- <- _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)
- else do {
+hscMain hsc_env mod location
+ source_unchanged have_object maybe_old_iface
+ = do {
+ (recomp_reqd, maybe_checked_iface) <-
+ _scc_ "checkOldIface"
+ checkOldIface hsc_env mod
+ (ml_hi_file location)
+ source_unchanged maybe_old_iface;
let no_old_iface = not (isJust maybe_checked_iface)
what_next | recomp_reqd || no_old_iface = hscRecomp
| otherwise = hscNoRecomp
- ;
- what_next ghci_mode dflags have_object mod location
- maybe_checked_iface hst hit pcs_ch
- }}
+
+ ; what_next hsc_env have_object
+ mod location maybe_checked_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
+-- hscNoRecomp definitely expects to have the old interface available
+hscNoRecomp hsc_env have_object
+ mod location (Just old_iface)
+ | hsc_mode hsc_env == OneShot
= do {
- when (verbosity dflags > 0) $
+ when (verbosity (hsc_dflags hsc_env) > 0) $
hPutStrLn stderr "compilation IS NOT required";
+ dumpIfaceStats hsc_env ;
+
let { bomb = panic "hscNoRecomp:OneShot" };
- return (HscNoRecomp pcs_ch bomb bomb)
+ return (HscNoRecomp bomb bomb)
}
| otherwise
= do {
- when (verbosity dflags >= 1) $
+ when (verbosity (hsc_dflags hsc_env) >= 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 ;
- if closure_errs then
- return (HscFail pcs_cl)
- else do {
-
- -- TYPECHECK
- maybe_tc_result
- <- typecheckIface dflags pcs_cl hst old_iface cl_hs_decls;
+ new_details <- _scc_ "tcRnIface"
+ typecheckIface hsc_env old_iface ;
+ dumpIfaceStats hsc_env ;
- case maybe_tc_result of {
- Nothing -> return (HscFail pcs_cl);
- Just (pcs_tc, new_details) ->
-
- return (HscNoRecomp pcs_tc new_details old_iface)
- }}}
+ return (HscNoRecomp new_details old_iface)
+ }
-hscRecomp ghci_mode dflags have_object
- mod location maybe_checked_iface hst hit pcs_ch
+hscRecomp hsc_env have_object
+ mod location maybe_checked_iface
= do {
-- what target are we shooting for?
- ; let toInterp = dopt_HscLang dflags == HscInterpreted
- ; let toNothing = dopt_HscLang dflags == HscNothing
+ ; 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))
+ isExtCoreFilename (fromJust (ml_hs_file location))
- ; when (ghci_mode /= OneShot && verbosity dflags >= 1) $
+ ; when (not one_shot && verbosity dflags >= 1) $
hPutStrLn stderr ("Compiling " ++
showModMsg (not toInterp) mod location);
- ; front_res <-
- (if toCore then hscCoreFrontEnd else hscFrontEnd)
- ghci_mode dflags location hst hit pcs_ch
+ ; front_res <- if toCore then
+ hscCoreFrontEnd hsc_env location
+ else
+ hscFrontEnd hsc_env location
+
; case front_res of
Left flure -> return flure;
- Right (this_mod, rdr_module,
- dont_discard, new_iface,
- pcs_tc, ds_details, foreign_stuff) -> do {
-
- let {
- imported_module_names =
- filter (/= gHC_PRIM_Name) $
- map ideclName (hsModuleImports rdr_module);
+ Right ds_result -> do {
- imported_modules =
- map (moduleNameToModule hit (pcs_PIT pcs_tc))
- imported_module_names;
- }
- -- force this out now, so we don't keep a hold of rdr_module or pcs_tc
- ; seqList imported_modules `seq` return ()
+ -- OMITTED:
+ -- ; seqList imported_modules (return ())
-------------------
-- FLATTENING
-------------------
- ; flat_details
- <- _scc_ "Flattening"
- flatten dflags pcs_tc hst ds_details
-
- ; 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
+ ; flat_result <- _scc_ "Flattening"
+ flatten hsc_env ds_result
+
+
+{- TEMP: need to review space-leak fixing here
+ NB: even the code generator can force one of the
+ thunks for constructor arguments, for newtypes in particular
+
+ ; let -- Rule-base accumulated from imported packages
+ pkg_rule_base = eps_rule_base (hsc_EPS hsc_env)
+
+ -- 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
- -- foreign_stuff
- -- ds_details
- -- new_iface
- -- imported_modules
+ -- flat_result
+ -- pkg_rule_base
-------------------
-- SIMPLIFY
-------------------
- ; simpl_details
- <- _scc_ "Core2Core"
- core2core dflags pcs_middle hst dont_discard flat_details
+ ; simpl_result <- _scc_ "Core2Core"
+ core2core hsc_env flat_result
-------------------
-- 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
+ ; tidy_result <- _scc_ "CoreTidy"
+ tidyCorePgm hsc_env simpl_result
- ; emitExternalCore dflags new_iface tidy_details
+ -- Emit external core
+ ; emitExternalCore dflags tidy_result
- ; let final_details = tidy_details {md_binds = []}
- ; final_details `seq` return ()
+ -- Alive at this point:
+ -- tidy_result, pcs_final
+ -- hsc_env
-------------------
- -- PREPARE FOR CODE GENERATION
- -------------------
- -- Do saturation and convert to A-normal form
- ; prepd_details <- _scc_ "CorePrep"
- corePrepPgm dflags tidy_details
+ -- 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
+ ; let { final_globals | one_shot = Nothing
+ | otherwise = Just $! (mg_rdr_env tidy_result) }
+ ; final_globals `seq` return ()
+
+ -- 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
- -------------------
- ; let
- ModDetails{md_binds=binds, md_types=env_tc} = prepd_details
-
- local_tycons = typeEnvTyCons env_tc
- local_classes = typeEnvClasses env_tc
-
- (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 \"" ++ unpackFS fname ++ "\"")
- . reverse
- $ headers
-
- -- ...and add the string to the headers requested via command line
- -- options
- --
- ; fhdrs <- readIORef v_HCHeader
- ; writeIORef v_HCHeader (fhdrs ++ foreign_headers)
-
- ; (stub_h_exists, stub_c_exists, maybe_bcos, final_iface )
- <- if toInterp
-#ifdef GHCI
- then do
- ----------------- Generate byte code ------------------
- (bcos,itbl_env) <- byteCodeGen dflags binds
- local_tycons local_classes
+ ; (stub_h_exists, stub_c_exists, maybe_bcos)
+ <- hscBackEnd dflags tidy_result
- -- Fill in the code-gen info
- writeIORef cg_info_ref (Just emptyNameEnv)
+ -- And the answer is ...
+ ; dumpIfaceStats hsc_env
- ------------------ BUILD THE NEW ModIface ------------
- final_iface <- _scc_ "MkFinalIface"
- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface tidy_details
-
- ------------------ Create f-x-dynamic C-side stuff ---
- (istub_h_exists, istub_c_exists)
- <- outputForeignStubs dflags c_code h_code
-
- return ( istub_h_exists, istub_c_exists,
- Just (bcos,itbl_env), final_iface )
-#else
- then error "GHC not compiled with interpreter"
-#endif
-
- 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 (HscRecomp pcs_final
- final_details
+ ; return (HscRecomp final_details
+ final_globals
final_iface
stub_h_exists stub_c_exists
maybe_bcos)
}}
-hscCoreFrontEnd ghci_mode dflags location hst hit pcs_ch = do {
+hscCoreFrontEnd hsc_env 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));
+ FailP s -> hPutStrLn stderr s >> return (Left HscFail);
OkP rdr_module -> do {
- ; let this_mod = mkHomeModule (hsModuleName rdr_module)
-------------------
- -- RENAME
- -------------------
- ; (pcs_rn, print_unqual, maybe_rn_result)
- <- renameExtCore dflags hit hst pcs_ch this_mod rdr_module
- ; case maybe_rn_result of {
- Nothing -> return (Left (HscFail pcs_ch));
- Just (dont_discard, new_iface, rn_decls) -> do {
-
- -------------------
- -- TYPECHECK
+ -- RENAME and TYPECHECK
-------------------
- ; maybe_tc_result
- <- _scc_ "TypeCheck"
- typecheckCoreModule dflags pcs_rn hst new_iface rn_decls
+ ; maybe_tc_result <- _scc_ "TypeCheck"
+ tcRnExtCore hsc_env rdr_module
; case maybe_tc_result of {
- Nothing -> return (Left (HscFail pcs_ch));
- Just (pcs_tc, tc_result) -> do {
-
- -------------------
- -- DESUGAR
- -------------------
- ; (ds_details, foreign_stuff) <- deSugarCore tc_result
- ; return (Right (this_mod, rdr_module, dont_discard, new_iface,
- pcs_tc, ds_details, foreign_stuff))
- }}}}}}
+ Nothing -> return (Left HscFail);
+ Just mod_guts -> return (Right mod_guts)
+ -- No desugaring to do!
+ }}}
-hscFrontEnd ghci_mode dflags location hst hit pcs_ch = do {
+hscFrontEnd hsc_env location = do {
-------------------
-- PARSE
-------------------
- ; maybe_parsed <- myParseModule dflags
- (expectJust "hscRecomp:hspp" (ml_hspp_file location))
+ ; maybe_parsed <- myParseModule (hsc_dflags hsc_env)
+ (expectJust "hscFrontEnd:hspp" (ml_hspp_file location))
+
; case maybe_parsed of {
- Nothing -> return (Left (HscFail pcs_ch));
+ Nothing -> return (Left HscFail);
Just rdr_module -> do {
- ; let this_mod = mkHomeModule (hsModuleName rdr_module)
-------------------
- -- RENAME
- -------------------
- ; (pcs_rn, print_unqual, maybe_rn_result)
- <- _scc_ "Rename"
- renameModule dflags ghci_mode hit hst pcs_ch this_mod rdr_module
- ; case maybe_rn_result of {
- Nothing -> return (Left (HscFail pcs_ch));
- Just (dont_discard, new_iface, rn_result) -> do {
-
- -------------------
- -- TYPECHECK
+ -- RENAME and TYPECHECK
-------------------
- ; maybe_tc_result
- <- _scc_ "TypeCheck"
- typecheckModule dflags pcs_rn hst print_unqual rn_result
+ ; maybe_tc_result <- _scc_ "Typecheck-Rename"
+ tcRnModule hsc_env rdr_module
; case maybe_tc_result of {
- Nothing -> return (Left (HscFail pcs_ch));
- Just (pcs_tc, tc_result) -> do {
-
+ Nothing -> return (Left HscFail);
+ Just tc_result -> do {
+
-------------------
-- DESUGAR
-------------------
- ; (ds_details, foreign_stuff)
- <- _scc_ "DeSugar"
- deSugar dflags pcs_tc hst this_mod print_unqual tc_result
- ; return (Right (this_mod, rdr_module, dont_discard, new_iface,
- pcs_tc, ds_details, foreign_stuff))
- }}}}}}}
+ ; maybe_ds_result <- _scc_ "DeSugar"
+ deSugar hsc_env tc_result
+ ; case maybe_ds_result of
+ Nothing -> return (Left HscFail);
+ Just ds_result -> return (Right 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
+
+ other ->
+ do
+ ----------------- Convert to STG ------------------
+ (stg_binds, cost_centre_info) <- _scc_ "CoreToStg"
+ myCoreToStg dflags this_mod prepd_binds
+
+ ------------------ Code generation ------------------
+ abstractC <- _scc_ "CodeGen"
+ codeGen dflags this_mod type_env foreign_stubs
+ dir_imps cost_centre_info stg_binds
+
+ ------------------ Code output -----------------------
+ (stub_h_exists, stub_c_exists)
+ <- codeOutput dflags this_mod foreign_stubs
+ dependencies abstractC
+
+ return (stub_h_exists, stub_c_exists, Nothing)
+ }
myParseModule dflags src_filename
_scc_ "Parser" do
buf <- hGetStringBuffer src_filename
- let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
- parrEF = dopt Opt_PArr dflags}
- loc = mkSrcLoc (mkFastString src_filename) 1
+ let loc = mkSrcLoc (mkFastString src_filename) 1 0
- case parseModule buf (mkPState loc exts) of {
+ case unP parseModule (mkPState buf loc dflags) of {
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
- freeStringBuffer buf;
- return Nothing };
+ PFailed span err -> do { printError span err ;
+ return Nothing };
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do {
+ POk _ rdr_module -> do {
dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_module) ;
}}
-myCoreToStg dflags this_mod tidy_binds
+myCoreToStg dflags this_mod prepd_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 -- JRS
- --
- -- This is still necessary. -- SDM (10 Dec 2001)
-
stg_binds <- _scc_ "Core2Stg"
- coreToStg dflags tidy_binds
+ coreToStg dflags prepd_binds
(stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
stg2stg dflags this_mod stg_binds
- 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)
+ return (stg_binds2, cost_centre_info)
\end{code}
%* *
%************************************************************************
-\begin{code}
-#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}
-
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
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
- (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
-
- -- Flatten it
- ; flat_expr <- flattenExpr dflags pcs2 hst ds_expr
-
- -- Simplify it
- ; simpl_expr <- simplifyExpr dflags pcs2 hst flat_expr
+#ifdef GHCI
+hscStmt -- Compile a stmt all the way to an HValue, but don't run it
+ :: HscEnv
+ -> InteractiveContext -- Context for compiling
+ -> String -- The statement
+ -> IO (Maybe (InteractiveContext, [Name], HValue))
- -- Tidy it (temporary, until coreSat does cloning)
- ; tidy_expr <- tidyCoreExpr simpl_expr
+hscStmt hsc_env icontext stmt
+ = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) stmt
+ ; case maybe_stmt of {
+ Nothing -> return Nothing ;
+ Just parsed_stmt -> do {
- -- Prepare for codegen
- ; prepd_expr <- corePrepExpr dflags tidy_expr
+ -- Rename and typecheck it
+ maybe_tc_result
+ <- tcRnStmt hsc_env icontext parsed_stmt
- -- Convert to BCOs
- ; bcos <- coreExprToBCOs dflags prepd_expr
+ ; case maybe_tc_result of {
+ Nothing -> return Nothing ;
+ Just (new_ic, bound_names, tc_expr) -> do {
- ; 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
+ -- Then desugar, code gen, and link it
+ ; hval <- compileExpr hsc_env iNTERACTIVE
+ (ic_rn_gbl_env new_ic)
+ (ic_type_env new_ic)
+ tc_expr
- ; return (pcs2, Just (global_bound_ids, ty, bcos))
+ ; return (Just (new_ic, bound_names, hval))
+ }}}}}
- }}}}}
+hscTcExpr -- Typecheck an expression (but don't run it)
+ :: HscEnv
+ -> InteractiveContext -- Context for compiling
+ -> String -- The expression
+ -> IO (Maybe Type)
+
+hscTcExpr hsc_env icontext expr
+ = do { maybe_stmt <- hscParseStmt (hsc_dflags hsc_env) expr
+ ; case maybe_stmt of {
+ Just (L _ (ExprStmt expr _))
+ -> tcRnExpr hsc_env icontext expr ;
+ Just other -> do { hPutStrLn stderr ("not an expression: `" ++ expr ++ "'") ;
+ return Nothing } ;
+ Nothing -> return Nothing } }
+\end{code}
-hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
+\begin{code}
+hscParseStmt :: DynFlags -> String -> IO (Maybe (LStmt RdrName))
hscParseStmt dflags str
- = do -------------------------- Parser ----------------
- showPass dflags "Parser"
+ = do showPass dflags "Parser"
_scc_ "Parser" do
buf <- stringToStringBuffer str
- let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
- parrEF = dopt Opt_PArr dflags}
- loc = mkSrcLoc FSLIT("<interactive>") 1
+ let loc = mkSrcLoc FSLIT("<interactive>") 1 0
- case parseStmt buf (mkPState loc exts) of {
+ case unP parseStmt (mkPState buf loc dflags) of {
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
--- Not yet implemented in <4.11 freeStringBuffer buf;
- return Nothing };
+ PFailed span err -> do { printError span err;
+ return Nothing };
-- no stmt: the line consisted of just space or comments
POk _ Nothing -> return Nothing;
--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)
}}
\begin{code}
#ifdef GHCI
hscThing -- like hscStmt, but deals with a single identifier
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
+ :: HscEnv
-> InteractiveContext -- Context for compiling
-> String -- The identifier
- -> IO ( PersistentCompilerState,
- [TyThing] )
+ -> IO [(IfaceDecl, Fixity)]
-hscThing dflags hst hit pcs0 ic str
- = do maybe_rdr_name <- myParseIdentifier dflags str
+hscThing hsc_env ic str
+ = do maybe_rdr_name <- myParseIdentifier (hsc_dflags hsc_env) 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
- | isInternalName n = lookupNameEnv (ic_type_env ic) n
- | otherwise = lookupType hst (pcs_PTE pcs) n
-
- maybe_ty_things = map do_lookup names
- in
- return (pcs, catMaybes maybe_ty_things) }
- }}}
+ Nothing -> return [];
+ Just (L _ rdr_name) -> do
+
+ maybe_tc_result <- tcRnThing hsc_env ic rdr_name
+
+ case maybe_tc_result of {
+ Nothing -> return [] ;
+ Just things -> return things
+ }}
myParseIdentifier dflags str
= do buf <- stringToStringBuffer str
- let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
- parrEF = dopt Opt_PArr dflags}
- loc = mkSrcLoc FSLIT("<interactive>") 1
+ let loc = mkSrcLoc FSLIT("<interactive>") 1 0
+ case unP parseIdentifier (mkPState buf loc dflags) of
- case parseIdentifier buf (mkPState loc exts) of
+ PFailed span err -> do { printError span err;
+ return Nothing }
- 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) }
+ POk _ rdr_name -> return (Just rdr_name)
#endif
\end{code}
%************************************************************************
%* *
-\subsection{Find all the things defined in a module}
+ Desugar, simplify, convert to bytecode, and link an expression
%* *
%************************************************************************
\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)
- }}}}
+compileExpr :: HscEnv
+ -> Module -> GlobalRdrEnv -> TypeEnv
+ -> LHsExpr Id
+ -> IO HValue
+
+compileExpr hsc_env 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 this_mod rdr_env type_env tc_expr
+
+ -- Flatten it
+ ; flat_expr <- flattenExpr hsc_env ds_expr
+
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags flat_expr
+
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; tidy_expr <- tidyCoreExpr simpl_expr
+
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
+
+ -- 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 ()
+
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
+
+ -- link it
+ ; hval <- linkExpr hsc_env bcos
+
+ ; return hval
+ }
#endif
\end{code}
+
%************************************************************************
%* *
-\subsection{Initial persistent state}
+ Statistics on reading interfaces
%* *
%************************************************************************
\begin{code}
-initPersistentCompilerState :: IO PersistentCompilerState
-initPersistentCompilerState
- = do prs <- initPersistentRenamerState
- return (
- PCS { pcs_PIT = emptyIfaceTable,
- pcs_PTE = wiredInThingEnv,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleBase,
- pcs_PRS = prs
- }
- )
-
-initPersistentRenamerState :: IO PersistentRenamerState
- = do us <- mkSplitUniqSupply 'r'
- return (
- PRS { prsOrig = NameSupply { nsUniqs = us,
- nsNames = initOrigNames,
- nsIPs = emptyFM },
- prsDecls = (emptyNameEnv, 0),
- prsInsts = (emptyBag, 0),
- prsRules = foldr add_rule (emptyBag, 0) builtinRules,
- prsImpMods = emptyFM
- }
- )
+dumpIfaceStats :: HscEnv -> IO ()
+dumpIfaceStats hsc_env
+ = do { eps <- readIORef (hsc_EPS hsc_env)
+ ; dumpIfSet (dump_if_trace || dump_rn_stats)
+ "Interface statistics"
+ (ifaceStats eps) }
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 knownKeyNames `plusFM` grab (map getName wiredInThings)
- where
- grab names = foldl add emptyFM names
- add env name
- = addToFM env (moduleName (nameModule name), nameOccName name) name
+ dflags = hsc_dflags hsc_env
+ dump_rn_stats = dopt Opt_D_dump_rn_stats dflags
+ dump_if_trace = dopt Opt_D_dump_if_trace dflags
\end{code}