%
% (c) The GRASP/AQUA Project, Glasgow University, 1993-2000
%
+
\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
#include "HsVersions.h"
#ifdef GHCI
-import RdrHsSyn ( RdrNameStmt )
-import Rename ( renameStmt )
import ByteCodeGen ( byteCodeGen )
+import CoreTidy ( tidyCoreExpr )
+import CorePrep ( corePrepExpr )
+import Rename ( renameStmt )
+import RdrHsSyn ( RdrNameStmt )
+import Type ( Type )
+import Id ( Id, idName, setGlobalIdDetails )
+import IdInfo ( GlobalIdDetails(VanillaGlobal) )
+import HscTypes ( InteractiveContext(..), TyThing(..) )
+import PrelNames ( iNTERACTIVE )
+import StringBuffer ( stringToStringBuffer )
#endif
import HsSyn
-import StringBuffer ( hGetStringBuffer,
- stringToStringBuffer, freeStringBuffer )
+import Id ( idName )
+import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
+import StringBuffer ( hGetStringBuffer, freeStringBuffer )
import Parser
import Lex ( PState(..), ParseResult(..) )
import SrcLoc ( mkSrcLoc )
import Rules ( emptyRuleBase )
import PrelInfo ( wiredInThingEnv, wiredInThings )
import PrelNames ( vanillaSyntaxMap, knownKeyNames )
-import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails,
- writeIface, pprIface )
+import MkIface ( mkFinalIface )
import TcModule
import InstEnv ( emptyInstEnv )
import Desugar
import SimplCore
import CoreUtils ( coreBindsSize )
import CoreTidy ( tidyCorePgm )
-import CoreSat
+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 )
+import Module ( ModuleName, moduleName, mkHomeModule,
+ moduleUserString )
import CmdLineOpts
-import ErrUtils ( dumpIfSet_dyn, showPass )
+import ErrUtils ( dumpIfSet_dyn, showPass, printError )
import Util ( unJust )
import UniqSupply ( mkSplitUniqSupply )
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 FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName, isGlobalName,
- emptyNameEnv, extendNameEnvList
- )
+import Name ( Name, nameModule, nameOccName, getName, isGlobalName )
+import NameEnv ( emptyNameEnv, mkNameEnv )
import Module ( Module, lookupModuleEnvByName )
+import Maybes ( orElse )
+
+import IOExts ( newIORef, readIORef, writeIORef, unsafePerformIO )
import Monad ( when )
import Maybe ( isJust )
| 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 String) -- generated stub_h filename (in TMPDIR)
+ (Maybe String) -- generated stub_c filename (in TMPDIR)
(Maybe ([UnlinkedBCO],ItblEnv)) -- interpreted code, if any
hscMain
:: GhciMode
-> DynFlags
- -> Bool -- source unchanged?
+ -> Module
-> ModuleLocation -- 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 source_unchanged location maybe_old_iface hst hit pcs
+hscMain ghci_mode dflags mod location source_unchanged have_object
+ maybe_old_iface hst hit pcs
= do {
showPass dflags ("Checking old interface for hs = "
++ show (ml_hs_file location)
what_next | recomp_reqd || no_old_iface = hscRecomp
| otherwise = hscNoRecomp
;
- what_next ghci_mode dflags location maybe_checked_iface
- hst hit pcs_ch
+ what_next ghci_mode dflags have_object mod location
+ maybe_checked_iface hst hit pcs_ch
}}
-- we definitely expect to have the old interface available
-hscNoRecomp ghci_mode dflags location (Just old_iface) hst hit pcs_ch
+hscNoRecomp ghci_mode dflags have_object
+ mod location (Just old_iface) hst hit pcs_ch
| ghci_mode == OneShot
= do {
hPutStrLn stderr "compilation IS NOT required";
| otherwise
= do {
when (verbosity dflags >= 1) $
- hPutStrLn stderr ("Skipping " ++
- (unJust "hscNoRecomp" (ml_hs_file location)));
+ hPutStrLn stderr ("Skipping " ++
+ compMsg have_object mod location);
-- CLOSURE
(pcs_cl, closure_errs, cl_hs_decls)
case maybe_tc_result of {
Nothing -> return (HscFail pcs_cl);
- Just (pcs_tc, env_tc, local_rules) -> do {
+ Just (pcs_tc, 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 use_object mod location =
+ mod_str ++ take (max 0 (16 - length mod_str)) (repeat ' ')
+ ++" ( " ++ unJust "hscRecomp" (ml_hs_file location) ++ ", "
+ ++ (if use_object
+ then unJust "hscRecomp" (ml_obj_file location)
+ else "interpreted")
+ ++ " )"
+ where mod_str = moduleUserString mod
-hscRecomp ghci_mode dflags location maybe_checked_iface hst hit pcs_ch
- = do {
- ; when (verbosity dflags >= 1) $
- hPutStrLn stderr ("Compiling " ++
- (unJust "hscRecomp" (ml_hs_file location)))
+hscRecomp ghci_mode dflags have_object
+ mod location maybe_checked_iface hst hit pcs_ch
+ = do {
-- what target are we shooting for?
; let toInterp = dopt_HscLang dflags == HscInterpreted
+ ; when (verbosity dflags >= 1) $
+ hPutStrLn stderr ("Compiling " ++
+ compMsg (not toInterp) mod location);
+
-------------------
-- PARSE
-------------------
Nothing -> return (HscFail pcs_ch{-was: pcs_rn-});
Just (pcs_tc, tc_result) -> do {
- ; let env_tc = tc_env tc_result
-
-------------------
-- DESUGAR
-------------------
- ; (ds_binds, ds_rules, foreign_stuff)
+ ; (ds_details, foreign_stuff)
<- _scc_ "DeSugar"
deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
-------------------
- -- SIMPLIFY, TIDY-CORE
+ -- SIMPLIFY
+ -------------------
+ ; simpl_details
+ <- _scc_ "Core2Core"
+ core2core dflags pcs_tc hst dont_discard ds_details
+
-------------------
- -- 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
-
+ -- TIDY
-------------------
- -- BUILD THE NEW ModDetails AND ModIface
+ ; 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)
+ <- tidyCorePgm dflags this_mod pcs_tc cg_info simpl_details
+
-------------------
- ; 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
+ -- PREPARE FOR CODE GENERATION
+ -------------------
+ -- Do saturation and convert to A-normal form
+ ; prepd_details <- corePrepPgm dflags tidy_details
-------------------
-- CONVERT TO STG and COMPLETE CODE GENERATION
-------------------
- -- Do saturation and convert to A-normal form
- ; saturated <- coreSatPgm dflags tidy_binds
+ ; let
+ ModDetails{md_binds=binds, md_types=env_tc} = prepd_details
+
+ local_tycons = typeEnvTyCons env_tc
+ local_classes = typeEnvClasses env_tc
+
+ imported_module_names = map ideclName (hsModuleImports rdr_module)
+ imported_modules = map mod_name_to_Module imported_module_names
+
+ (h_code,c_code,fe_binders) = foreign_stuff
+
+ pit = pcs_PIT pcs_simpl
+
+ mod_name_to_Module :: ModuleName -> Module
+ mod_name_to_Module nm
+ = let str_mi = lookupModuleEnvByName hit nm `orElse`
+ lookupModuleEnvByName pit nm `orElse`
+ pprPanic "mod_name_to_Module: no hst or pst mapping for"
+ (ppr nm)
+ in mi_module str_mi
+
+ ; (maybe_stub_h_filename, maybe_stub_c_filename,
+ maybe_bcos, final_iface )
+ <- if toInterp
+ 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
+
+ return ( Nothing, Nothing,
+ Just (bcos,itbl_env), final_iface )
+
+ 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
+
+ ------------------ 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
+ binds stg_binds
+ c_code h_code abstractC
+
+ return ( maybe_stub_h_name, maybe_stub_c_name,
+ Nothing, final_iface )
+
+ ; let final_details = tidy_details {md_binds = []}
- ; (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)
-- and the answer is ...
- ; return (HscRecomp pcs_simpl new_details final_iface
+ ; return (HscRecomp pcs_simpl
+ final_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
-
-
myParseModule dflags src_filename
= do -------------------------- Parser ----------------
showPass dflags "Parser"
}}
-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 this_mod 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
- --let bcos = byteCodeGen dflags tidy_binds local_tycons local_classes
-
-
- stg_binds <- _scc_ "Core2Stg" coreToStg dflags this_mod tidy_binds
+ stg_binds <- _scc_ "Core2Stg" coreToStg dflags tidy_binds
(stg_binds2, cost_centre_info)
<- _scc_ "Core2Stg" stg2stg dflags this_mod stg_binds
- return (stg_binds2, cost_centre_info)
+ let env_rhs :: CgInfoEnv
+ env_rhs = mkNameEnv [ (idName bndr, CgInfo (stgRhsArity rhs) caf_info)
+ | (bind,_) <- stg_binds2,
+ let caf_info
+ | stgBindHasCafRefs bind = MayHaveCafRefs
+ | otherwise = NoCafRefs,
+ (bndr,rhs) <- stgBindPairs bind ]
+
+ return (stg_binds2, cost_centre_info, env_rhs)
where
- local_tycons = typeEnvTyCons env_tc
- local_classes = typeEnvClasses env_tc
+ stgBindPairs (StgNonRec _ b r) = [(b,r)]
+ stgBindPairs (StgRec _ prs) = prs
\end{code}
-> PersistentCompilerState -- IN: persistent compiler state
-> InteractiveContext -- Context for compiling
-> String -- The statement
+ -> Bool -- just treat it as an expression
-> IO ( PersistentCompilerState,
- Maybe (InteractiveContext,
- [Id],
- UnlinkedBCOExpr) )
+ Maybe ( [Id],
+ Type,
+ UnlinkedBCOExpr) )
\end{code}
When the UnlinkedBCOExpr is linked you get an HValue of type
result not showable) ==> error
\begin{code}
-hscStmt dflags hst hit pcs0 icontext stmt
+hscStmt dflags hst hit pcs0 icontext stmt just_expr
= let
InteractiveContext {
- ic_rn_env = rn_env,
+ ic_rn_env = rn_env,
ic_type_env = type_env,
- ic_module = this_mod } = icontext
+ ic_module = scope_mod } = icontext
in
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 this_mod rn_env parsed_stmt
+ <- renameStmt dflags hit hst pcs0 scope_mod
+ iNTERACTIVE 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 {
+ maybe_tc_return <-
+ if just_expr
+ then case rn_stmt of { (syn, ExprStmt e _, decls) ->
+ typecheckExpr dflags pcs1 hst type_env
+ print_unqual iNTERACTIVE (syn,e,decls) }
+ else typecheckStmt dflags pcs1 hst type_env
+ 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 this_mod print_unqual tc_expr
+ ds_expr <- deSugarExpr dflags pcs2 hst iNTERACTIVE print_unqual tc_expr
-- Simplify it
; simpl_expr <- simplifyExpr dflags pcs2 hst ds_expr
- -- Saturate it
- ; sat_expr <- coreSatExpr dflags simpl_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 sat_expr
+ ; bcos <- coreExprToBCOs dflags prepd_expr
; let
- -- make all the bound ids "constant" ids, now that
+ -- 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.
- constant_bound_ids = map constantizeId bound_ids
- constantizeId id
- = modifyIdInfo (`setFlavourInfo` makeConstantFlavour
- (idFlavour id)) id
-
- new_rn_env = extendLocalRdrEnv rn_env
- (map idName constant_bound_ids)
- -- Extend the renamer-env from bound_ids, not bound_names,
- -- because the latter may contain [it] when the former is empty
-
- new_type_env = extendNameEnvList type_env
- [(getName id, AnId id) | id <- constant_bound_ids]
-
- new_icontext = icontext { ic_rn_env = new_rn_env,
- ic_type_env = new_type_env }
- ; return (pcs2, Just (new_icontext, bound_ids, bcos))
+ global_bound_ids = map globaliseId bound_ids;
+ globaliseId id = setGlobalIdDetails id VanillaGlobal
+
+ ; return (pcs2, Just (global_bound_ids, ty, bcos))
+
}}}}}
hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
projects / ghc-hetmet.git / blobdiff