\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( HscResult(..), hscMain,
+module HscMain (
+ HscResult(..), hscMain, initPersistentCompilerState
#ifdef GHCI
- hscStmt, hscThing, hscModuleContents,
+ , hscStmt, hscTcExpr, hscThing,
+ , compileExpr
#endif
- initPersistentCompilerState ) where
+ ) where
#include "HsVersions.h"
#ifdef GHCI
-import Interpreter
-import ByteCodeGen ( byteCodeGen )
+import TcHsSyn ( TypecheckedHsExpr )
+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 Flattening ( flattenExpr )
+import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnThing )
import RdrHsSyn ( RdrNameStmt )
-import OccName ( dataName, tcClsName,
- occNameSpace, setOccNameSpace )
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 Name ( Name )
+import CoreLint ( lintUnfolding )
#endif
import HsSyn
-import RdrName ( mkRdrOrig )
+import RdrName ( nameRdrName )
import Id ( idName )
import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
import StringBuffer ( hGetStringBuffer, freeStringBuffer )
import Parser
import Lex ( ParseResult(..), ExtFlags(..), mkPState )
-import SrcLoc ( mkSrcLoc )
-import Rename ( checkOldIface, renameModule, renameExtCore,
- closeIfaceDecls, RnResult(..) )
+import SrcLoc ( mkSrcLoc, noSrcLoc )
+import TcRnDriver ( checkOldIface, tcRnModule, tcRnExtCore, tcRnIface )
+import RnEnv ( extendOrigNameCache )
import Rules ( emptyRuleBase )
-import PrelInfo ( wiredInThingEnv, wiredInThings )
+import PrelInfo ( wiredInThingEnv, wiredInThings, knownKeyNames )
import PrelRules ( builtinRules )
-import PrelNames ( knownKeyNames, gHC_PRIM_Name )
-import MkIface ( mkFinalIface )
-import TcModule
+import MkIface ( mkIface )
import InstEnv ( emptyInstEnv )
import Desugar
-import Flattening ( flatten, flattenExpr )
+import Flattening ( flatten )
import SimplCore
import CoreUtils ( coreBindsSize )
import TidyPgm ( tidyCorePgm )
import CoreToStg ( coreToStg )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
-import CodeOutput ( codeOutput, outputForeignStubs )
+import CodeOutput ( codeOutput )
-import Module ( ModuleName, moduleName, mkHomeModule )
+import Module ( emptyModuleEnv )
import CmdLineOpts
-import DriverState ( v_HCHeader )
import DriverPhases ( isExtCore_file )
import ErrUtils ( dumpIfSet_dyn, showPass, printError )
import UniqSupply ( mkSplitUniqSupply )
import Outputable
import HscStats ( ppSourceStats )
import HscTypes
-import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
-import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName )
+import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
+import FiniteMap ( emptyFM )
+import Name ( nameModule, getName )
import NameEnv ( emptyNameEnv, mkNameEnv )
-import Module ( Module )
-import BasicTypes ( Version )
+import NameSet ( emptyNameSet )
+import Module ( Module, ModLocation(..), showModMsg )
import FastString
import Maybes ( expectJust )
-import Util ( seqList )
-import IOExts ( newIORef, readIORef, writeIORef,
- unsafePerformIO )
+import DATA_IOREF ( newIORef, readIORef, writeIORef )
+import UNSAFE_IO ( unsafePerformIO )
import Monad ( when )
import Maybe ( isJust, fromJust )
import IO
-
-import MkExternalCore ( emitExternalCore )
-import ParserCore
-import ParserCoreUtils
\end{code}
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
+ -> PersistentCompilerState -- IN: persistent compiler state
-> 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 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 ghci_mode dflags have_object mod location
- maybe_checked_iface hst hit pcs_ch
- }}
+
+ ; what_next hsc_env pcs_ch 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 pcs_ch 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";
let { bomb = panic "hscNoRecomp:OneShot" };
return (HscNoRecomp pcs_ch 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;
+ -- Typecheck
+ (pcs_tc, maybe_tc_result) <- tcRnIface hsc_env pcs_ch old_iface ;
case maybe_tc_result of {
- Nothing -> return (HscFail pcs_cl);
- Just (pcs_tc, new_details) ->
+ Nothing -> return (HscFail pcs_tc);
+ Just 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
+hscRecomp hsc_env pcs_ch 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))
- ; 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 pcs_ch location
+ else
+ hscFrontEnd hsc_env pcs_ch 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 :: [ModuleName];
- imported_module_names =
- filter (/= gHC_PRIM_Name) $
- map ideclName (hsModuleImports rdr_module);
+ Right (pcs_tc, ds_result) -> do {
- imported_modules :: [(Module,Version)];
- imported_modules =
- map (getModuleAndVersion 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 (return ())
-
- -- this module's version
- ; version <- return $! vers_module (mi_version new_iface)
+ -- OMITTED:
+ -- ; seqList imported_modules (return ())
-------------------
-- FLATTENING
-------------------
- ; flat_details
- <- _scc_ "Flattening"
- flatten dflags pcs_tc hst ds_details
+ ; flat_result <- _scc_ "Flattening"
+ flatten hsc_env pcs_tc ds_result
+
+ ; let pcs_middle = pcs_tc
+
+{- Again, omit this because it loses the usage info
+ which is needed in mkIface. Maybe we should compute
+ usage info earlier.
; pcs_middle
<- _scc_ "pcs_middle"
- if ghci_mode == OneShot
- then do init_pcs <- initPersistentCompilerState
+ if one_shot then
+ do init_pcs <- initPersistentCompilerState
init_prs <- initPersistentRenamerState
let
rules = pcs_rules pcs_tc
orig_tc `seq` rules `seq` new_prs `seq`
return init_pcs{ pcs_PRS = new_prs,
pcs_rules = rules }
- else return pcs_tc
+ else return pcs_tc
+-}
--- Should we remove bits of flat_details at this point?
--- ; flat_details <- case flat_details of
--- ModDetails { md_binds = binds } ->
+-- Should we remove bits of flat_result at this point?
+-- ; flat_result <- case flat_result of
+-- ModResult { md_binds = binds } ->
-- return ModDetails { md_binds = binds,
-- md_rules = [],
-- md_types = emptyTypeEnv,
-- alive at this point:
-- pcs_middle
- -- foreign_stuff
- -- flat_details
- -- imported_modules (seq'd)
- -- new_iface
- -- version
+ -- flat_result
-------------------
-- SIMPLIFY
-------------------
- ; simpl_details
- <- _scc_ "Core2Core"
- core2core dflags pcs_middle hst dont_discard flat_details
+ ; simpl_result <- _scc_ "Core2Core"
+ core2core hsc_env pcs_middle flat_result
-------------------
-- TIDY
-- cg_info_ref will be filled in just after restOfCodeGeneration
-- Meanwhile, tidyCorePgm is careful not to look at cg_info!
- ; (pcs_simpl, tidy_details)
+ ; (pcs_simpl, tidy_result)
<- _scc_ "CoreTidy"
- tidyCorePgm dflags this_mod pcs_middle cg_info simpl_details
-
- ; pcs_final <- if ghci_mode == OneShot then initPersistentCompilerState
- else return pcs_simpl
+ tidyCorePgm dflags pcs_middle cg_info simpl_result
- -- alive at this point:
- -- tidy_details
- -- new_iface
-
- ; emitExternalCore dflags new_iface tidy_details
+-- Space-saving ploy doesn't work so well now
+-- because mkIface needs the populated PIT to
+-- generate usage info. Maybe we should re-visit this.
+-- ; pcs_final <- if one_shot then initPersistentCompilerState
+-- else return pcs_simpl
+ ; let pcs_final = pcs_simpl
- ; let final_details = tidy_details {md_binds = []}
- ; final_details `seq` return ()
+ -- Alive at this point:
+ -- tidy_result, pcs_final
-------------------
-- PREPARE FOR CODE GENERATION
- -------------------
- -- Do saturation and convert to A-normal form
- ; prepd_details <- _scc_ "CorePrep"
- corePrepPgm dflags tidy_details
+ -- Do saturation and convert to A-normal form
+ ; prepd_result <- _scc_ "CorePrep"
+ corePrepPgm dflags 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
-
- -- Fill in the code-gen info
- writeIORef cg_info_ref (Just emptyNameEnv)
-
- ------------------ BUILD THE NEW ModIface ------------
- final_iface <- _scc_ "MkFinalIface"
- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface tidy_details
-
- ------------------ 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
+ ; (stub_h_exists, stub_c_exists, maybe_bcos)
+ <- hscBackEnd dflags cg_info_ref prepd_result
- 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 version
- 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)
+ -------------------
+ -- 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
+ ; final_iface <- _scc_ "MkFinalIface"
+ mkIface hsc_env location
+ maybe_checked_iface tidy_result
+ ; let final_details = ModDetails { md_types = mg_types tidy_result,
+ md_insts = mg_insts tidy_result,
+ md_rules = mg_rules tidy_result }
+ ; emitExternalCore dflags tidy_result
-- and the answer is ...
; return (HscRecomp pcs_final
maybe_bcos)
}}
-hscCoreFrontEnd ghci_mode dflags location hst hit pcs_ch = do {
+hscCoreFrontEnd hsc_env pcs_ch location = do {
-------------------
-- PARSE
-------------------
; case parseCore inp 1 of
FailP s -> hPutStrLn stderr s >> return (Left (HscFail pcs_ch));
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
+ ; (pcs_tc, maybe_tc_result) <- _scc_ "TypeCheck"
+ tcRnExtCore hsc_env pcs_ch 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 pcs_tc));
+ Just mod_guts -> return (Right (pcs_tc, mod_guts))
+ -- No desugaring to do!
+ }}}
-hscFrontEnd ghci_mode dflags location hst hit pcs_ch = do {
+hscFrontEnd hsc_env pcs_ch 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));
Just rdr_module -> do {
- ; let this_mod = mkHomeModule (hsModuleName rdr_module)
-------------------
- -- RENAME
+ -- RENAME and TYPECHECK
-------------------
- ; (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
- -------------------
- ; maybe_tc_result
- <- _scc_ "TypeCheck"
- typecheckModule dflags pcs_rn hst print_unqual rn_result
+ ; (pcs_tc, maybe_tc_result) <- _scc_ "Typecheck and Rename"
+ tcRnModule hsc_env pcs_ch rdr_module
; case maybe_tc_result of {
Nothing -> return (Left (HscFail pcs_ch));
- Just (pcs_tc, tc_result) -> do {
-
+ 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))
- }}}}}}}
+ ; ds_result <- _scc_ "DeSugar"
+ deSugar hsc_env pcs_tc tc_result
+ ; return (Right (pcs_tc, ds_result))
+ }}}}}
+
+
+hscBackEnd dflags cg_info_ref prepd_result
+ = case dopt_HscLang dflags of
+ HscNothing -> return (False, False, Nothing)
+
+ HscInterpreted ->
+#ifdef GHCI
+ do ----------------- Generate byte code ------------------
+ comp_bc <- byteCodeGen dflags prepd_result
+
+ -- Fill in the code-gen info
+ writeIORef cg_info_ref (Just emptyNameEnv)
+
+ ------------------ Create f-x-dynamic C-side stuff ---
+ (istub_h_exists, istub_c_exists)
+ <- outputForeignStubs dflags (mg_foreign prepd_result)
+
+ 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, stg_back_end_info)
+ <- _scc_ "CoreToStg"
+ myCoreToStg dflags prepd_result
+
+ -- Fill in the code-gen info for the earlier tidyCorePgm
+ writeIORef cg_info_ref (Just stg_back_end_info)
+
+ ------------------ Code generation ------------------
+ abstractC <- _scc_ "CodeGen"
+ codeGen dflags prepd_result
+ cost_centre_info stg_binds
+
+ ------------------ Code output -----------------------
+ (stub_h_exists, stub_c_exists)
+ <- codeOutput dflags prepd_result abstractC
+
+ return (stub_h_exists, stub_c_exists, Nothing)
myParseModule dflags src_filename
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) ;
}}
-myCoreToStg dflags this_mod tidy_binds
+myCoreToStg dflags (ModGuts {mg_module = this_mod, mg_binds = tidy_binds})
= do
() <- coreBindsSize tidy_binds `seq` return ()
-- TEMP: the above call zaps some space usage allocated by the
%* *
%************************************************************************
-\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
+#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) )
- -- Simplify it
- ; simpl_expr <- simplifyExpr dflags pcs2 hst flat_expr
+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 {
- -- Tidy it (temporary, until coreSat does cloning)
- ; tidy_expr <- tidyCoreExpr simpl_expr
+ -- Rename and typecheck it
+ (pcs1, maybe_tc_result)
+ <- tcRnStmt hsc_env pcs icontext parsed_stmt
- -- Prepare for codegen
- ; prepd_expr <- corePrepExpr dflags tidy_expr
-
- -- Convert to BCOs
- ; bcos <- coreExprToBCOs dflags prepd_expr
+ ; case maybe_tc_result of {
+ Nothing -> return (pcs1, 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 pcs1 iNTERACTIVE
+ (ic_rn_gbl_env new_ic)
+ (ic_type_env new_ic)
+ tc_expr
- ; return (pcs2, Just (global_bound_ids, ty, bcos))
+ ; 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 -------------------------- Parser ----------------
- showPass dflags "Parser"
+ = do showPass dflags "Parser"
_scc_ "Parser" do
buf <- stringToStringBuffer str
\begin{code}
#ifdef GHCI
hscThing -- like hscStmt, but deals with a single identifier
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
+ :: HscEnv
-> PersistentCompilerState -- IN: persistent compiler state
-> InteractiveContext -- Context for compiling
-> String -- The identifier
-> IO ( PersistentCompilerState,
[TyThing] )
-hscThing dflags hst hit pcs0 ic str
- = do maybe_rdr_name <- myParseIdentifier dflags str
+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
- -- 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) }
- }}}
+ (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
%************************************************************************
%* *
-\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 (a home module will certainly
- -- alraedy be loaded, but a package module might not be)
- (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 {
+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
- -- Typecheck the declarations
- maybe_pcs <-
- typecheckExtraDecls dflags pcs1 hst print_unqual iNTERACTIVE rn_decls;
+ -- Simplify it
+ ; simpl_expr <- simplifyExpr dflags flat_expr
- case maybe_pcs of {
- Nothing -> return (pcs1, Nothing);
- Just pcs2 ->
+ -- Tidy it (temporary, until coreSat does cloning)
+ ; tidy_expr <- tidyCoreExpr simpl_expr
- let { all_names
- | exports_only = names
- | otherwise = -- Invariant; we only have (not exports_only)
- -- for a home module so it must already be in the HIT
- 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 ];
+ -- Prepare for codegen
+ ; prepd_expr <- corePrepExpr dflags tidy_expr
- pte = pcs_PTE pcs2;
+ -- 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 ()
- ty_things = map (fromJust . lookupType hst pte) all_names;
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
- } in
+ -- link it
+ ; hval <- linkExpr hsc_env pcs bcos
- return (pcs2, Just ty_things)
- }}}}
+ ; return hval
+ }
#endif
\end{code}
+
%************************************************************************
%* *
\subsection{Initial persistent state}
\begin{code}
initPersistentCompilerState :: IO PersistentCompilerState
initPersistentCompilerState
- = do prs <- initPersistentRenamerState
+ = do nc <- initNameCache
return (
- PCS { pcs_PIT = emptyIfaceTable,
- pcs_PTE = wiredInThingEnv,
- pcs_insts = emptyInstEnv,
- pcs_rules = emptyRuleBase,
- pcs_PRS = prs
- }
- )
-
-initPersistentRenamerState :: IO PersistentRenamerState
+ PCS { pcs_EPS = initExternalPackageState,
+ pcs_nc = nc })
+
+initNameCache :: IO NameCache
= 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
- }
- )
+ return (NameCache { nsUniqs = us,
+ nsNames = initOrigNames,
+ nsIPs = emptyFM })
+
+initExternalPackageState :: ExternalPackageState
+initExternalPackageState
+ = EPS {
+ eps_decls = (emptyNameEnv, 0),
+ eps_insts = (emptyBag, 0),
+ eps_inst_gates = emptyNameSet,
+ eps_rules = foldr add_rule (emptyBag, 0) builtinRules,
+
+ eps_PIT = emptyPackageIfaceTable,
+ eps_PTE = wiredInThingEnv,
+ eps_inst_env = emptyInstEnv,
+ eps_rule_base = emptyRuleBase }
+
where
- add_rule (name,rule) (rules, n_rules)
- = (gated_decl `consBag` rules, n_rules+1)
+ 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 = mkRdrOrig (moduleName mod) (nameOccName name)
+ rdr_name = nameRdrName name
gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible
-initOrigNames :: FiniteMap (ModuleName,OccName) Name
+initOrigNames :: OrigNameCache
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
+ = insert knownKeyNames $
+ insert (map getName wiredInThings) $
+ emptyModuleEnv
+ where
+ insert names env = foldl extendOrigNameCache env names
\end{code}