%
% (c) The GRASP/AQUA Project, Glasgow University, 1993-2000
%
+
\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain ( HscResult(..), hscMain,
+module HscMain (
+ HscResult(..), hscMain, initPersistentCompilerState
#ifdef GHCI
- hscStmt,
+ , hscStmt, hscTcExpr, hscThing,
+ , compileExpr
#endif
- initPersistentCompilerState ) where
+ ) where
#include "HsVersions.h"
#ifdef GHCI
+import TcHsSyn ( TypecheckedHsExpr )
+import CodeOutput ( outputForeignStubs )
+import ByteCodeGen ( byteCodeGen, coreExprToBCOs )
+import Linker ( HValue, linkExpr )
+import TidyPgm ( tidyCoreExpr )
+import CorePrep ( corePrepExpr )
+import Flattening ( flattenExpr )
+import TcRnDriver ( tcRnStmt, tcRnExpr, tcRnThing )
import RdrHsSyn ( RdrNameStmt )
-import Rename ( renameStmt )
-import ByteCodeGen ( byteCodeGen )
+import Type ( Type )
+import PrelNames ( iNTERACTIVE )
+import StringBuffer ( stringToStringBuffer )
#endif
import HsSyn
-import StringBuffer ( hGetStringBuffer,
- stringToStringBuffer, freeStringBuffer )
+import RdrName ( nameRdrName )
+import Id ( idName )
+import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
+import StringBuffer ( hGetStringBuffer, freeStringBuffer )
import Parser
-import Lex ( PState(..), ParseResult(..) )
+import Lex ( ParseResult(..), ExtFlags(..), mkPState )
import SrcLoc ( mkSrcLoc )
-import Rename ( checkOldIface, renameModule, closeIfaceDecls )
+import TcRnDriver ( checkOldIface, tcRnModule, tcRnExtCore, tcRnIface )
import Rules ( emptyRuleBase )
-import PrelInfo ( wiredInThingEnv, wiredInThings )
-import PrelNames ( vanillaSyntaxMap, knownKeyNames )
-import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails,
- writeIface, pprIface )
-import TcModule
+import PrelInfo ( wiredInThingEnv, wiredInThings, knownKeyNames )
+import PrelRules ( builtinRules )
+import MkIface ( mkIface )
import InstEnv ( emptyInstEnv )
import Desugar
+import Flattening ( flatten )
import SimplCore
import CoreUtils ( coreBindsSize )
-import CoreTidy ( tidyCorePgm )
-import CoreSat
+import TidyPgm ( tidyCorePgm )
+import CorePrep ( corePrepPgm )
+import StgSyn
import CoreToStg ( coreToStg )
import SimplStg ( stg2stg )
import CodeGen ( codeGen )
import CodeOutput ( codeOutput )
-import Id ( Id, idName, idFlavour, modifyIdInfo )
-import IdInfo ( setFlavourInfo, makeConstantFlavour )
-import Module ( ModuleName, moduleName, mkHomeModule,
- moduleUserString )
+import Module ( ModuleName, moduleName )
import CmdLineOpts
-import ErrUtils ( dumpIfSet_dyn, showPass )
-import Util ( unJust )
+import DriverPhases ( isExtCore_file )
+import ErrUtils ( dumpIfSet_dyn, showPass, printError )
import UniqSupply ( mkSplitUniqSupply )
-import Bag ( emptyBag )
+import Bag ( consBag, emptyBag )
import Outputable
-import Interpreter
-import CmStaticInfo ( GhciMode(..) )
import HscStats ( ppSourceStats )
-import HscTypes ( ModDetails, ModIface(..), PersistentCompilerState(..),
- PersistentRenamerState(..), ModuleLocation(..),
- HomeSymbolTable, InteractiveContext(..), TyThing(..),
- NameSupply(..), PackageRuleBase, HomeIfaceTable,
- typeEnvClasses, typeEnvTyCons, emptyIfaceTable,
- extendLocalRdrEnv
- )
+import HscTypes
+import MkExternalCore ( emitExternalCore )
+import ParserCore
+import ParserCoreUtils
import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName, isGlobalName,
- emptyNameEnv, extendNameEnvList
- )
-import Module ( Module, lookupModuleEnvByName )
+import Name ( Name, nameModule, nameOccName, getName )
+import NameEnv ( emptyNameEnv, mkNameEnv )
+import NameSet ( emptyNameSet )
+import Module ( Module, ModLocation(..), showModMsg )
+import FastString
+import Maybes ( expectJust )
+
+import DATA_IOREF ( newIORef, readIORef, writeIORef )
+import UNSAFE_IO ( unsafePerformIO )
import Monad ( when )
-import Maybe ( isJust )
+import Maybe ( isJust, fromJust )
import IO
\end{code}
| HscRecomp PersistentCompilerState -- updated PCS
ModDetails -- new details (HomeSymbolTable additions)
ModIface -- new iface (if any compilation was done)
- (Maybe String) -- generated stub_h filename (in /tmp)
- (Maybe String) -- generated stub_c filename (in /tmp)
- (Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any
-
+ Bool -- stub_h exists
+ Bool -- stub_c exists
+ (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
- -> Bool -- source unchanged?
+ -> 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 maybe_old_iface hst hit pcs
+hscMain hsc_env pcs mod location
+ source_unchanged have_object maybe_old_iface
= 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))
- <- checkOldIface ghci_mode dflags hit hst pcs
- (unJust "hscMain" (ml_hi_file location))
- source_unchanged maybe_old_iface;
-
- if errs_found then
- return (HscFail pcs_ch)
- else 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 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 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 {
- hPutStrLn stderr "compilation IS NOT required";
+ 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) $
- hPutStrLn stderr ("Skipping " ++ compMsg 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 {
+ when (verbosity (hsc_dflags hsc_env) >= 1) $
+ hPutStrLn stderr ("Skipping " ++
+ showModMsg have_object mod location);
- -- TYPECHECK
- maybe_tc_result
- <- typecheckIface dflags pcs_cl hst old_iface (vanillaSyntaxMap, 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, env_tc, local_rules) -> do {
+ Nothing -> return (HscFail pcs_tc);
+ Just new_details ->
- -- create a new details from the closed, typechecked, old iface
- let new_details = mkModDetailsFromIface env_tc local_rules
- ;
return (HscNoRecomp pcs_tc new_details old_iface)
- }}}}
+ }}
-compMsg mod location =
- mod_str ++ take (12 - length mod_str) (repeat ' ')
- ++ " (" ++ unJust "hscRecomp" (ml_hs_file location) ++ ")"
- where mod_str = moduleUserString mod
+hscRecomp hsc_env pcs_ch have_object
+ mod location maybe_checked_iface
+ = do {
+ -- what target are we shooting for?
+ ; let one_shot = hsc_mode hsc_env == OneShot
+ ; let dflags = hsc_dflags hsc_env
+ ; let toInterp = dopt_HscLang dflags == HscInterpreted
+ ; let toCore = isJust (ml_hs_file location) &&
+ isExtCore_file (fromJust (ml_hs_file location))
+ ; when (not one_shot && verbosity dflags >= 1) $
+ hPutStrLn stderr ("Compiling " ++
+ showModMsg (not toInterp) mod location);
+
+ ; front_res <- if toCore then
+ hscCoreFrontEnd hsc_env pcs_ch location
+ else
+ hscFrontEnd hsc_env pcs_ch location
-hscRecomp ghci_mode dflags mod location maybe_checked_iface hst hit pcs_ch
- = do {
- ; when (verbosity dflags >= 1) $
- hPutStrLn stderr ("Compiling " ++ compMsg mod location);
+ ; case front_res of
+ Left flure -> return flure;
+ Right (pcs_tc, ds_result) -> do {
- -- what target are we shooting for?
- ; let toInterp = dopt_HscLang dflags == HscInterpreted
+
+ -- OMITTED:
+ -- ; seqList imported_modules (return ())
-------------------
- -- PARSE
+ -- FLATTENING
-------------------
- ; 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)
-
+ ; 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 one_shot 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
+-}
+
+-- 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,
+-- md_insts = [] }
+
+ -- alive at this point:
+ -- pcs_middle
+ -- flat_result
+
-------------------
- -- RENAME
+ -- SIMPLIFY
-------------------
- ; (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
+ ; simpl_result <- _scc_ "Core2Core"
+ core2core hsc_env pcs_middle flat_result
-------------------
- -- TYPECHECK
+ -- TIDY
-------------------
- ; 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 {
-
- ; let env_tc = tc_env tc_result
+ ; 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_result)
+ <- _scc_ "CoreTidy"
+ tidyCorePgm dflags pcs_middle cg_info simpl_result
+
+-- 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
+
+ -- Alive at this point:
+ -- tidy_result, pcs_final
-------------------
- -- DESUGAR
+ -- PREPARE FOR CODE GENERATION
+ -- Do saturation and convert to A-normal form
+ ; prepd_result <- _scc_ "CorePrep"
+ corePrepPgm dflags tidy_result
+
+ -------------------
+ -- CONVERT TO STG and COMPLETE CODE GENERATION
+ ; (stub_h_exists, stub_c_exists, maybe_bcos)
+ <- hscBackEnd dflags cg_info_ref prepd_result
+
-------------------
- ; (ds_binds, ds_rules, foreign_stuff)
- <- _scc_ "DeSugar"
- deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
+ -- 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
+ final_details
+ final_iface
+ stub_h_exists stub_c_exists
+ maybe_bcos)
+ }}
+hscCoreFrontEnd hsc_env pcs_ch location = do {
-------------------
- -- SIMPLIFY, TIDY-CORE
+ -- PARSE
-------------------
- -- We grab the the unfoldings at this point.
- ; (pcs_simpl, tidy_binds, orphan_rules)
- <- simplThenTidy dflags pcs_tc hst this_mod dont_discard ds_binds ds_rules
-
+ ; inp <- readFile (expectJust "hscCoreFrontEnd:hspp" (ml_hspp_file location))
+ ; case parseCore inp 1 of
+ FailP s -> hPutStrLn stderr s >> return (Left (HscFail pcs_ch));
+ OkP rdr_module -> do {
+
-------------------
- -- BUILD THE NEW ModDetails AND ModIface
+ -- RENAME and TYPECHECK
-------------------
- ; let new_details = mkModDetails env_tc tidy_binds orphan_rules
- ; final_iface <- _scc_ "MkFinalIface"
- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface new_details
+ ; (pcs_tc, maybe_tc_result) <- _scc_ "TypeCheck"
+ tcRnExtCore hsc_env pcs_ch rdr_module
+ ; case maybe_tc_result of {
+ Nothing -> return (Left (HscFail pcs_tc));
+ Just mod_guts -> return (Right (pcs_tc, mod_guts))
+ -- No desugaring to do!
+ }}}
+
+hscFrontEnd hsc_env pcs_ch location = do {
-------------------
- -- CONVERT TO STG and COMPLETE CODE GENERATION
+ -- PARSE
-------------------
- -- Do saturation and convert to A-normal form
- ; saturated <- coreSatPgm dflags tidy_binds
+ ; maybe_parsed <- myParseModule (hsc_dflags hsc_env)
+ (expectJust "hscRecomp:hspp" (ml_hspp_file location))
- ; (maybe_stub_h_filename, maybe_stub_c_filename, maybe_bcos)
- <- restOfCodeGeneration dflags toInterp this_mod
- (map ideclName (hsModuleImports rdr_module))
- foreign_stuff env_tc saturated
- hit (pcs_PIT pcs_simpl)
+ ; case maybe_parsed of {
+ Nothing -> return (Left (HscFail pcs_ch));
+ Just rdr_module -> do {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ ; (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 tc_result -> do {
+
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; ds_result <- _scc_ "DeSugar"
+ deSugar hsc_env pcs_tc tc_result
+ ; return (Right (pcs_tc, ds_result))
+ }}}}}
- -- and the answer is ...
- ; return (HscRecomp pcs_simpl new_details final_iface
- maybe_stub_h_filename maybe_stub_c_filename
- maybe_bcos)
- }}}}}}}
-
-
-
-mkFinalIface ghci_mode dflags location maybe_old_iface new_iface new_details
- = case completeIface maybe_old_iface new_iface new_details of
- (new_iface, Nothing) -- no change in the interfacfe
- -> do when (dopt Opt_D_dump_hi_diffs dflags)
- (printDump (text "INTERFACE UNCHANGED"))
- dumpIfSet_dyn dflags Opt_D_dump_hi
- "UNCHANGED FINAL INTERFACE" (pprIface new_iface)
- return new_iface
- (new_iface, Just sdoc_diffs)
- -> do dumpIfSet_dyn dflags Opt_D_dump_hi_diffs "INTERFACE HAS CHANGED"
- sdoc_diffs
- dumpIfSet_dyn dflags Opt_D_dump_hi "NEW FINAL INTERFACE"
- (pprIface new_iface)
- -- Write the interface file
- when (ghci_mode /= Interactive)
- (writeIface (unJust "hscRecomp:hi" (ml_hi_file location))
- new_iface)
- return new_iface
+
+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
+ stg_binds abstractC
+
+ return (stub_h_exists, stub_c_exists, Nothing)
myParseModule dflags src_filename
= do -------------------------- Parser ----------------
showPass dflags "Parser"
_scc_ "Parser" do
+ buf <- hGetStringBuffer src_filename
- buf <- hGetStringBuffer True{-expand tabs-} src_filename
-
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
+ ffiEF = dopt Opt_FFI dflags,
+ withEF = dopt Opt_With dflags,
+ parrEF = dopt Opt_PArr dflags}
+ loc = mkSrcLoc (mkFastString src_filename) 1
- case parseModule buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc (_PK_ src_filename) 1 } of {
+ case parseModule buf (mkPState loc exts) of {
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) ;
}}
-simplThenTidy dflags pcs hst this_mod dont_discard binds rules
- = do -- Do main Core-language transformations ---------
- -- _scc_ "Core2Core"
- (simplified, orphan_rules)
- <- core2core dflags pcs hst dont_discard binds rules
-
- -- Do the final tidy-up
- (pcs', tidy_binds, tidy_orphan_rules)
- <- tidyCorePgm dflags this_mod pcs simplified orphan_rules
-
- return (pcs', tidy_binds, tidy_orphan_rules)
-
-
-restOfCodeGeneration dflags toInterp this_mod imported_module_names
- foreign_stuff env_tc tidy_binds
- hit pit -- these last two for mapping ModNames to Modules
- | toInterp
- = do (bcos,itbl_env)
- <- byteCodeGen dflags tidy_binds local_tycons local_classes
- return (Nothing, Nothing, Just (bcos,itbl_env))
-
- | otherwise
- = do
- -------------------------- Convert to STG -------------------------------
- (stg_binds, cost_centre_info)
- <- _scc_ "CoreToStg"
- myCoreToStg dflags this_mod tidy_binds env_tc
-
- -------------------------- Code generation ------------------------------
- abstractC <- _scc_ "CodeGen"
- codeGen dflags this_mod imported_modules
- cost_centre_info fe_binders
- local_tycons stg_binds
-
- -------------------------- Code output -------------------------------
- (maybe_stub_h_name, maybe_stub_c_name)
- <- codeOutput dflags this_mod local_tycons
- tidy_binds stg_binds
- c_code h_code abstractC
-
- return (maybe_stub_h_name, maybe_stub_c_name, Nothing)
- where
- local_tycons = typeEnvTyCons env_tc
- local_classes = typeEnvClasses env_tc
- imported_modules = map mod_name_to_Module imported_module_names
- (h_code,c_code,fe_binders) = foreign_stuff
-
- mod_name_to_Module :: ModuleName -> Module
- mod_name_to_Module nm
- = let str_mi = case lookupModuleEnvByName hit nm of
- Just mi -> mi
- Nothing -> case lookupModuleEnvByName pit nm of
- Just mi -> mi
- Nothing -> barf nm
- in mi_module str_mi
- barf nm = pprPanic "mod_name_to_Module: no hst or pst mapping for"
- (ppr nm)
-
-
-myCoreToStg dflags this_mod tidy_binds env_tc
+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
-- simplifier, which for reasons I don't understand, persists
- -- thoroughout code generation
+ -- thoroughout code generation -- JRS
+ --
+ -- This is still necessary. -- SDM (10 Dec 2001)
- --let bcos = byteCodeGen dflags tidy_binds local_tycons local_classes
+ stg_binds <- _scc_ "Core2Stg"
+ coreToStg dflags tidy_binds
-
- stg_binds <- _scc_ "Core2Stg" coreToStg dflags this_mod tidy_binds
+ (stg_binds2, cost_centre_info) <- _scc_ "Core2Stg"
+ stg2stg dflags this_mod stg_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)
- where
- local_tycons = typeEnvTyCons env_tc
- local_classes = typeEnvClasses env_tc
+ return (stg_binds2, cost_centre_info, env_rhs)
\end{code}
%* *
%************************************************************************
-\begin{code}
-#ifdef GHCI
-hscStmt
- :: DynFlags
- -> HomeSymbolTable
- -> HomeIfaceTable
- -> PersistentCompilerState -- IN: persistent compiler state
- -> InteractiveContext -- Context for compiling
- -> String -- The statement
- -> IO ( PersistentCompilerState,
- Maybe ( [Id],
- 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
- = let
- InteractiveContext {
- ic_rn_env = rn_env,
- ic_type_env = type_env,
- ic_module = this_mod } = icontext
- in
- do { maybe_stmt <- hscParseStmt dflags stmt
- ; case maybe_stmt of
- Nothing -> return (pcs0, Nothing)
- Just parsed_stmt -> do {
+#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) )
- -- Rename it
- (pcs1, print_unqual, maybe_renamed_stmt)
- <- renameStmt dflags hit hst pcs0 this_mod rn_env parsed_stmt
- ; case maybe_renamed_stmt of
- Nothing -> return (pcs0, Nothing)
- Just (bound_names, rn_stmt) -> do {
-
- -- Typecheck it
- maybe_tc_return <- typecheckStmt dflags pcs1 hst type_env
- print_unqual this_mod bound_names rn_stmt
- ; case maybe_tc_return of {
- Nothing -> return (pcs0, Nothing) ;
- Just (pcs2, tc_expr, bound_ids) -> do {
-
- -- Desugar it
- ds_expr <- deSugarExpr dflags pcs2 hst this_mod print_unqual tc_expr
-
- -- Simplify it
- ; simpl_expr <- simplifyExpr dflags pcs2 hst ds_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 {
- -- Saturate it
- ; sat_expr <- coreSatExpr dflags simpl_expr
+ -- Rename and typecheck it
+ (pcs1, maybe_tc_result)
+ <- tcRnStmt hsc_env pcs icontext parsed_stmt
- -- Convert to BCOs
- ; bcos <- coreExprToBCOs dflags sat_expr
+ ; case maybe_tc_result of {
+ Nothing -> return (pcs1, Nothing) ;
+ Just (new_ic, bound_names, tc_expr) -> do {
- ; let
- -- make all the bound ids "constant" 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.
- constant_bound_ids = map constantizeId bound_ids;
+ -- Then desugar, code gen, and link it
+ ; hval <- compileExpr hsc_env pcs1 iNTERACTIVE
+ (icPrintUnqual new_ic) tc_expr
- constantizeId id
- = modifyIdInfo (`setFlavourInfo` makeConstantFlavour
- (idFlavour id)) id
+ ; return (pcs1, Just (new_ic, bound_names, hval))
+ }}}}}
- ; return (pcs2, Just (constant_bound_ids, bcos))
- }}}}}
+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"
- _scc_ "Parser" do
+ = do showPass dflags "Parser"
+ _scc_ "Parser" do
buf <- stringToStringBuffer str
- let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
+ ffiEF = dopt Opt_FFI dflags,
+ withEF = dopt Opt_With dflags,
+ parrEF = dopt Opt_PArr dflags}
+ loc = mkSrcLoc FSLIT("<interactive>") 1
- case parseStmt buf PState{ bol = 0#, atbol = 1#,
- context = [], glasgow_exts = glaexts,
- loc = mkSrcLoc SLIT("<no file>") 0 } of {
+ case parseStmt buf (mkPState loc exts) of {
PFailed err -> do { hPutStrLn stderr (showSDoc err);
-- Not yet implemented in <4.11 freeStringBuffer buf;
%************************************************************************
%* *
+\subsection{Getting information about an identifer}
+%* *
+%************************************************************************
+
+\begin{code}
+#ifdef GHCI
+hscThing -- like hscStmt, but deals with a single identifier
+ :: HscEnv
+ -> PersistentCompilerState -- IN: persistent compiler state
+ -> InteractiveContext -- Context for compiling
+ -> String -- The identifier
+ -> IO ( PersistentCompilerState,
+ [TyThing] )
+
+hscThing hsc_env pcs0 ic str
+ = do let dflags = hsc_dflags hsc_env
+
+ maybe_rdr_name <- myParseIdentifier dflags str
+ case maybe_rdr_name of {
+ Nothing -> return (pcs0, []);
+ Just rdr_name -> do
+
+ (pcs1, maybe_tc_result) <-
+ tcRnThing hsc_env pcs0 ic rdr_name
+
+ case maybe_tc_result of {
+ Nothing -> return (pcs1, []) ;
+ Just things -> return (pcs1, things)
+ }}
+
+myParseIdentifier dflags str
+ = do buf <- stringToStringBuffer str
+
+ let exts = ExtFlags {glasgowExtsEF = dopt Opt_GlasgowExts dflags,
+ ffiEF = dopt Opt_FFI dflags,
+ withEF = dopt Opt_With dflags,
+ parrEF = dopt Opt_PArr dflags}
+ loc = mkSrcLoc FSLIT("<interactive>") 1
+
+ case parseIdentifier buf (mkPState loc exts) of
+
+ PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ freeStringBuffer buf;
+ return Nothing }
+
+ POk _ rdr_name -> do { --should, but can't: freeStringBuffer buf;
+ return (Just rdr_name) }
+#endif
+\end{code}
+
+%************************************************************************
+%* *
+ Desugar, simplify, convert to bytecode, and link an expression
+%* *
+%************************************************************************
+
+\begin{code}
+#ifdef GHCI
+compileExpr :: HscEnv
+ -> PersistentCompilerState
+ -> Module -> PrintUnqualified
+ -> TypecheckedHsExpr
+ -> IO HValue
+
+compileExpr hsc_env pcs this_mod print_unqual tc_expr
+ = do { let dflags = hsc_dflags hsc_env
+
+ -- Desugar it
+ ; ds_expr <- deSugarExpr hsc_env pcs this_mod print_unqual tc_expr
+
+ -- Flatten it
+ ; flat_expr <- flattenExpr hsc_env pcs 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
+
+ -- Convert to BCOs
+ ; bcos <- coreExprToBCOs dflags prepd_expr
+
+ -- link it
+ ; hval <- linkExpr hsc_env pcs bcos
+
+ ; 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 = (emptyBag, 0),
- 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_imp_mods = emptyFM,
+
+ eps_PIT = emptyPackageIfaceTable,
+ eps_PTE = wiredInThingEnv,
+ eps_inst_env = emptyInstEnv,
+ eps_rule_base = emptyRuleBase }
+
+ where
+ add_rule (name,rule) (rules, n_slurped)
+ = (gated_decl `consBag` rules, n_slurped)
+ where
+ gated_decl = (gate_fn, (mod, IfaceRuleOut rdr_name rule))
+ mod = nameModule name
+ rdr_name = nameRdrName name
+ gate_fn vis_fn = vis_fn name -- Load the rule whenever name is visible
initOrigNames :: FiniteMap (ModuleName,OccName) Name
initOrigNames
grab names = foldl add emptyFM names
add env name
= addToFM env (moduleName (nameModule name), nameOccName name) name
-
-
-initRules :: PackageRuleBase
-initRules = emptyRuleBase
-{- SHOULD BE (ish)
- foldl add emptyVarEnv builtinRules
- where
- add env (name,rule)
- = extendRuleBase env name rule
--}
\end{code}