\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( HscResult(..), hscMain,
+module HscMain (
+ HscResult(..),
+ hscMain, newHscEnv, hscCmmFile,
+ hscBufferCheck, hscFileCheck,
#ifdef GHCI
- hscStmt, hscThing, hscModuleContents,
+ , hscStmt, hscTcExpr, hscKcType
+ , hscGetInfo, GetInfoResult
+ , compileExpr
#endif
- initPersistentCompilerState ) where
+ ) where
#include "HsVersions.h"
#ifdef GHCI
-import Interpreter
-import ByteCodeGen ( byteCodeGen )
-import CoreTidy ( tidyCoreExpr )
+import HsSyn ( Stmt(..), LStmt, LHsExpr, LHsType )
+import IfaceSyn ( IfaceDecl, IfaceInst )
+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, tcRnGetInfo, tcRnType )
+import RdrName ( rdrNameOcc )
+import OccName ( occNameUserString )
import Type ( Type )
-import Id ( Id, idName, setGlobalIdDetails )
-import IdInfo ( GlobalIdDetails(VanillaGlobal) )
-import Name ( isLocalName )
-import NameEnv ( lookupNameEnv )
-import RdrName ( rdrEnvElts )
import PrelNames ( iNTERACTIVE )
import StringBuffer ( stringToStringBuffer )
-import FastString ( mkFastString )
-import Maybes ( catMaybes )
-
-import List ( nub )
+import Kind ( Kind )
+import Var ( Id )
+import CoreLint ( lintUnfolding )
+import DsMeta ( templateHaskellNames )
+import BasicTypes ( Fixity )
+import SrcLoc ( SrcLoc, noSrcLoc )
#endif
-import HsSyn
-
-import RdrName ( mkRdrOrig )
-import Id ( idName )
-import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
-import StringBuffer ( hGetStringBuffer, freeStringBuffer )
+import RdrName ( RdrName )
+import HsSyn ( HsModule )
+import SrcLoc ( Located(..) )
+import StringBuffer ( hGetStringBuffer )
import Parser
-import Lex ( PState(..), ParseResult(..) )
+import Lexer ( P(..), ParseResult(..), mkPState )
import SrcLoc ( mkSrcLoc )
-import Finder ( findModule )
-import Rename ( checkOldIface, renameModule, closeIfaceDecls )
-import Rules ( emptyRuleBase )
-import PrelInfo ( wiredInThingEnv, wiredInThings )
-import PrelRules ( builtinRules )
-import PrelNames ( knownKeyNames )
-import MkIface ( mkFinalIface )
-import TcModule
-import InstEnv ( emptyInstEnv )
+import TcRnDriver ( tcRnModule, tcRnExtCore )
+import TcRnTypes ( TcGblEnv )
+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 )
import SimplCore
-import CoreUtils ( coreBindsSize )
-import CoreTidy ( tidyCorePgm )
+import TidyPgm ( tidyCorePgm )
import CorePrep ( corePrepPgm )
-import StgSyn
import CoreToStg ( coreToStg )
+import Name ( Name, NamedThing(..) )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
+import CmmParse ( parseCmmFile )
import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleName, mkHomeModule,
- moduleUserString, lookupModuleEnv )
import CmdLineOpts
-import ErrUtils ( dumpIfSet_dyn, showPass, printError )
-import Util ( unJust )
+import DriverPhases ( isExtCoreFilename )
+import ErrUtils
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, isGlobalName )
-import NameEnv ( emptyNameEnv, mkNameEnv )
-import Module ( Module )
-
-import IOExts ( newIORef, readIORef, writeIORef, unsafePerformIO )
+import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
+import Module ( Module, ModLocation(..), showModMsg )
+import FastString
+import Maybes ( expectJust )
+import StringBuffer ( StringBuffer )
+import Bag ( unitBag, emptyBag )
import Monad ( when )
import Maybe ( isJust, fromJust )
import IO
+import DATA_IOREF ( newIORef, readIORef )
+\end{code}
-import MkExternalCore ( emitExternalCore )
+
+%************************************************************************
+%* *
+ 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
+
+ -- In IDE mode: we just do the static/dynamic checks
+ | HscChecked (Located (HsModule RdrName)) (Maybe TcGblEnv)
+
+ -- 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)
+
+
+-- What to do when we have compiler error or warning messages
+type MessageAction = Messages -> IO ()
-- no errors or warnings; the individual passes
-- (parse/rename/typecheck) print messages themselves
hscMain
- :: GhciMode
- -> DynFlags
+ :: HscEnv
+ -> MessageAction -- what to do with errors/warnings
-> 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 (ml_hi_file location)
- source_unchanged maybe_old_iface;
-
- if errs_found then
- return (HscFail pcs_ch)
- else do {
+hscMain hsc_env msg_act 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 msg_act 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 msg_act have_object
+ mod location (Just old_iface)
+ | isOneShot (hsc_mode hsc_env)
= do {
- when (verbosity dflags > 0) $
- hPutStrLn stderr "compilation IS NOT required";
+ compilationProgressMsg (hsc_dflags hsc_env) $
+ "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) $
- 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;
-
- case maybe_tc_result of {
- Nothing -> return (HscFail pcs_cl);
- Just (pcs_tc, new_details) ->
-
- return (HscNoRecomp pcs_tc new_details old_iface)
- }}}
-
-hscRecomp ghci_mode dflags have_object
- mod location maybe_checked_iface hst hit pcs_ch
+ compilationProgressMsg (hsc_dflags hsc_env) $
+ ("Skipping " ++ showModMsg have_object mod location);
+
+ new_details <- _scc_ "tcRnIface"
+ typecheckIface hsc_env old_iface ;
+ dumpIfaceStats hsc_env ;
+
+ return (HscNoRecomp new_details old_iface)
+ }
+
+hscRecomp hsc_env msg_act 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
-
- ; when (ghci_mode /= OneShot && verbosity dflags >= 1) $
- hPutStrLn stderr ("Compiling " ++
- showModMsg (not toInterp) mod location);
+ ; let one_shot = isOneShot (hsc_mode hsc_env)
+ ; let dflags = hsc_dflags hsc_env
+ ; let toInterp = dopt_HscLang dflags == HscInterpreted
+ ; let toCore = isJust (ml_hs_file location) &&
+ isExtCoreFilename (fromJust (ml_hs_file location))
+
+ ; when (not one_shot) $
+ compilationProgressMsg dflags $
+ ("Compiling " ++ showModMsg (not toInterp) mod location);
+
+ ; let hspp_file = expectJust "hscFrontEnd:hspp" (ml_hspp_file location)
+ ; front_res <- if toCore then
+ hscCoreFrontEnd hsc_env msg_act hspp_file
+ else
+ hscFileFrontEnd hsc_env msg_act hspp_file
+
+ ; case front_res of
+ Left flure -> return flure;
+ Right ds_result -> do {
+
+
+ -- OMITTED:
+ -- ; seqList imported_modules (return ())
-------------------
- -- 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
+ -- FLATTENING
-------------------
- ; (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
+ ; flat_result <- _scc_ "Flattening"
+ flatten hsc_env ds_result
- -------------------
- -- 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
- <- _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
+
+{- 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
+ -- flat_result
+ -- pkg_rule_base
-------------------
-- SIMPLIFY
-------------------
- ; simpl_details
- <- _scc_ "Core2Core"
- core2core dflags pcs_middle hst dont_discard ds_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
+ ; tidy_result <- _scc_ "CoreTidy"
+ tidyCorePgm hsc_env simpl_result
- -- alive at this point:
- -- tidy_details
- -- new_iface
+ -- Emit external core
+ ; emitExternalCore dflags tidy_result
- ; emitExternalCore dflags new_iface tidy_details
+ -- Alive at this point:
+ -- tidy_result, pcs_final
+ -- hsc_env
- ; let final_details = tidy_details {md_binds = []}
- ; final_details `seq` return ()
+ -------------------
+ -- 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 }
-------------------
- -- PREPARE FOR CODE GENERATION
+ -- CONVERT TO STG and COMPLETE CODE GENERATION
+ ; (stub_h_exists, stub_c_exists, maybe_bcos)
+ <- hscBackEnd dflags tidy_result
+
+ -- And the answer is ...
+ ; dumpIfaceStats hsc_env
+
+ ; return (HscRecomp final_details
+ final_globals
+ final_iface
+ stub_h_exists stub_c_exists
+ maybe_bcos)
+ }}
+
+hscCoreFrontEnd hsc_env msg_act hspp_file = do {
-------------------
- -- Do saturation and convert to A-normal form
- ; prepd_details <- _scc_ "CorePrep"
- corePrepPgm dflags tidy_details
+ -- PARSE
+ -------------------
+ ; inp <- readFile hspp_file
+ ; case parseCore inp 1 of
+ FailP s -> putMsg s{-ToDo: wrong-} >> return (Left HscFail)
+ OkP rdr_module -> do {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ ; (tc_msgs, maybe_tc_result) <- _scc_ "TypeCheck"
+ tcRnExtCore hsc_env rdr_module
+ ; msg_act tc_msgs
+ ; case maybe_tc_result of {
+ Nothing -> return (Left HscFail);
+ Just mod_guts -> return (Right mod_guts)
+ -- No desugaring to do!
+ }}}
+
+hscFileFrontEnd hsc_env msg_act hspp_file = do {
-------------------
- -- CONVERT TO STG and COMPLETE CODE GENERATION
+ -- PARSE
-------------------
- ; let
- ModDetails{md_binds=binds, md_types=env_tc} = prepd_details
+ ; maybe_parsed <- myParseModule (hsc_dflags hsc_env) hspp_file
- local_tycons = typeEnvTyCons env_tc
- local_classes = typeEnvClasses env_tc
+ ; case maybe_parsed of {
+ Left err -> do { msg_act (unitBag err, emptyBag) ;
+ ; return (Left HscFail) ;
+ };
+ Right rdr_module -> do {
- imported_module_names = map ideclName (hsModuleImports rdr_module)
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ ; (tc_msgs, maybe_tc_result) <- _scc_ "Typecheck-Rename"
+ tcRnModule hsc_env rdr_module
+ ; msg_act tc_msgs
+ ; case maybe_tc_result of {
+ Nothing -> return (Left HscFail);
+ Just tc_result -> do {
- mod_name_to_Module nm
- = do m <- findModule nm ; return (fst (fromJust m))
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; (warns, maybe_ds_result) <- _scc_ "DeSugar"
+ deSugar hsc_env tc_result
+ ; msg_act (warns, emptyBag)
+ ; case maybe_ds_result of
+ Nothing -> return (Left HscFail);
+ Just ds_result -> return (Right ds_result);
+ }}}}}
- (h_code,c_code,fe_binders) = foreign_stuff
- ; imported_modules <- mapM mod_name_to_Module imported_module_names
+hscFileCheck hsc_env msg_act hspp_file = do {
+ -------------------
+ -- PARSE
+ -------------------
+ ; maybe_parsed <- myParseModule (hsc_dflags hsc_env) hspp_file
- ; (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
+ ; case maybe_parsed of {
+ Left err -> do { msg_act (unitBag err, emptyBag) ;
+ ; return HscFail ;
+ };
+ Right rdr_module -> hscBufferTypecheck hsc_env rdr_module msg_act
+ }}
+
+
+-- Perform static/dynamic checks on the source code in a StringBuffer
+-- This is a temporary solution: it'll read in interface files lazily, whereas
+-- we probably want to use the compilation manager to load in all the modules
+-- in a project.
+hscBufferCheck :: HscEnv -> StringBuffer -> MessageAction -> IO HscResult
+hscBufferCheck hsc_env buffer msg_act = do
+ let loc = mkSrcLoc (mkFastString "*edit*") 1 0
+ showPass (hsc_dflags hsc_env) "Parser"
+ case unP parseModule (mkPState buffer loc (hsc_dflags hsc_env)) of
+ PFailed span err -> do
+ msg_act (emptyBag, unitBag (mkPlainErrMsg span err))
+ return HscFail
+ POk _ rdr_module -> do
+ hscBufferTypecheck hsc_env rdr_module msg_act
+
+hscBufferTypecheck hsc_env rdr_module msg_act = do
+ (tc_msgs, maybe_tc_result) <- _scc_ "Typecheck-Rename"
+ tcRnModule hsc_env rdr_module
+ msg_act tc_msgs
+ case maybe_tc_result of
+ Nothing -> return (HscChecked rdr_module Nothing)
+ -- space leak on rdr_module!
+ Just r -> return (HscChecked rdr_module (Just r))
+
+
+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 {
- -- Fill in the code-gen info
- writeIORef cg_info_ref (Just emptyNameEnv)
+ -------------------
+ -- PREPARE FOR CODE GENERATION
+ -- Do saturation and convert to A-normal form
+ prepd_binds <- _scc_ "CorePrep"
+ corePrepPgm dflags core_binds type_env;
- ------------------ BUILD THE NEW ModIface ------------
- final_iface <- _scc_ "MkFinalIface"
- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface tidy_details
+ case dopt_HscLang dflags of
+ HscNothing -> return (False, False, Nothing)
- return ( False, False, Just (bcos,itbl_env), final_iface )
+ 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
- then error "GHC not compiled with interpreter"
+ panic "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
- final_iface
- stub_h_exists stub_c_exists
- maybe_bcos)
- }}}}}}}
+ 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)
+ }
+
+
+hscCmmFile :: DynFlags -> FilePath -> IO Bool
+hscCmmFile dflags filename = do
+ maybe_cmm <- parseCmmFile dflags filename
+ case maybe_cmm of
+ Nothing -> return False
+ Just cmm -> do
+ codeOutput dflags no_mod NoStubs noDependencies [cmm]
+ return True
+ where
+ no_mod = panic "hscCmmFile: no_mod"
+
myParseModule dflags src_filename
= do -------------------------- Parser ----------------
showPass dflags "Parser"
_scc_ "Parser" do
+ buf <- hGetStringBuffer src_filename
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
+ let loc = mkSrcLoc (mkFastString src_filename) 1 0
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ case unP parseModule (mkPState buf loc dflags) of {
- case parseModule buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc (_PK_ src_filename) 1 } of {
+ PFailed span err -> return (Left (mkPlainErrMsg span err));
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
- freeStringBuffer buf;
- return Nothing };
-
- POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do {
+ POk _ rdr_module -> 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)
+ return (Right rdr_module)
-- ToDo: free the string buffer later.
}}
-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
-
- -- Simplify it
- ; simpl_expr <- simplifyExpr dflags pcs2 hst ds_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 ; -- Parse error
+ Just Nothing -> return Nothing ; -- Empty line
+ Just (Just parsed_stmt) -> do { -- The real stuff
- -- 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 {
+ Nothing -> return Nothing ; -- Parse error
+ Just (Just (L _ (ExprStmt expr _)))
+ -> tcRnExpr hsc_env icontext expr ;
+ Just other -> do { errorMsg ("not an expression: `" ++ expr ++ "'") ;
+ return Nothing } ;
+ } }
+
+hscKcType -- Find the kind of a type
+ :: HscEnv
+ -> InteractiveContext -- Context for compiling
+ -> String -- The type
+ -> IO (Maybe Kind)
+
+hscKcType hsc_env icontext str
+ = do { maybe_type <- hscParseType (hsc_dflags hsc_env) str
+ ; case maybe_type of {
+ Just ty -> tcRnType hsc_env icontext ty ;
+ Just other -> do { errorMsg ("not an type: `" ++ str ++ "'") ;
+ return Nothing } ;
+ Nothing -> return Nothing } }
+\end{code}
-hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
-hscParseStmt dflags str
- = do -------------------------- Parser ----------------
- showPass dflags "Parser"
+\begin{code}
+hscParseStmt :: DynFlags -> String -> IO (Maybe (Maybe (LStmt RdrName)))
+hscParseStmt = hscParseThing parseStmt
+
+hscParseType :: DynFlags -> String -> IO (Maybe (LHsType RdrName))
+hscParseType = hscParseThing parseType
+
+hscParseIdentifier :: DynFlags -> String -> IO (Maybe (Located RdrName))
+hscParseIdentifier = hscParseThing parseIdentifier
+
+hscParseThing :: Outputable thing
+ => Lexer.P thing
+ -> DynFlags -> String
+ -> IO (Maybe thing)
+ -- Nothing => Parse error (message already printed)
+ -- Just x => success
+hscParseThing parser dflags str
+ = do showPass dflags "Parser"
_scc_ "Parser" do
buf <- stringToStringBuffer str
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ let loc = mkSrcLoc FSLIT("<interactive>") 1 0
- case parseStmt buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<interactive>") 1 } of {
+ case unP parser (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;
-
- POk _ (Just rdr_stmt) -> do {
+ POk _ thing -> do {
--ToDo: can't free the string buffer until we've finished this
-- compilation sweep and all the identifiers have gone away.
- --freeStringBuffer buf;
- dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_stmt);
- return (Just rdr_stmt)
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr thing);
+ return (Just thing)
}}
#endif
\end{code}
\begin{code}
#ifdef GHCI
-hscThing -- like hscStmt, but deals with a single identifier
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
+type GetInfoResult = (String, (IfaceDecl, Fixity, SrcLoc, [(IfaceInst,SrcLoc)]))
+
+hscGetInfo -- like hscStmt, but deals with a single identifier
+ :: HscEnv
-> InteractiveContext -- Context for compiling
-> String -- The identifier
- -> IO ( PersistentCompilerState,
- [TyThing] )
+ -> IO [GetInfoResult]
-hscThing dflags hst hit pcs0 ic str
- = do maybe_rdr_name <- myParseIdentifier dflags str
+hscGetInfo hsc_env ic str
+ = do maybe_rdr_name <- hscParseIdentifier (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
- | isLocalName n = lookupNameEnv (ic_type_env ic) n
- | otherwise = lookupType hst (pcs_PTE pcs) n
-
- maybe_ty_things = map do_lookup names
- in
- return (pcs, catMaybes maybe_ty_things) }
- }}}
-
-myParseIdentifier dflags str
- = do buf <- stringToStringBuffer str
-
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
-
- case parseIdentifier buf
- PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<interactive>") 1 } of
-
- PFailed err -> do { hPutStrLn stderr (showSDoc err);
- freeStringBuffer buf;
- return Nothing }
-
- POk _ rdr_name -> do { --should, but can't: freeStringBuffer buf;
- return (Just rdr_name) }
+ Nothing -> return [];
+ Just (L _ rdr_name) -> do
+
+ maybe_tc_result <- tcRnGetInfo hsc_env ic rdr_name
+
+ let -- str' is the the naked occurrence name
+ -- after stripping off qualification and parens (+)
+ str' = occNameUserString (rdrNameOcc rdr_name)
+
+ case maybe_tc_result of {
+ Nothing -> return [] ;
+ Just things -> return [(str', t) | t <- things]
+ }}
#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}
projects / ghc-hetmet.git / blobdiff