%
% (c) The GRASP/AQUA Project, Glasgow University, 1993-2000
%
+
\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
module HscMain ( HscResult(..), hscMain,
#ifdef GHCI
- hscExpr,
+ hscStmt,
#endif
initPersistentCompilerState ) where
#include "HsVersions.h"
#ifdef GHCI
-import RdrHsSyn ( RdrNameHsExpr )
-import Rename ( renameExpr )
-import StringBuffer ( stringToStringBuffer, freeStringBuffer )
-import Unique ( Uniquable(..) )
-import Type ( Type, splitTyConApp_maybe )
-import PrelNames ( ioTyConKey )
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 )
+import Id ( idName )
+import IdInfo ( CafInfo(..), CgInfoEnv, CgInfo(..) )
+import StringBuffer ( hGetStringBuffer, freeStringBuffer )
import Parser
import Lex ( PState(..), ParseResult(..) )
import SrcLoc ( mkSrcLoc )
import Rename ( checkOldIface, renameModule, closeIfaceDecls )
import Rules ( emptyRuleBase )
import PrelInfo ( wiredInThingEnv, wiredInThings )
-import PrelNames ( knownKeyNames )
-import MkIface ( completeIface, mkModDetailsFromIface, mkModDetails,
- writeIface, pprIface )
+import PrelNames ( vanillaSyntaxMap, knownKeyNames )
+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 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,
- NameSupply(..), PackageRuleBase, HomeIfaceTable,
- typeEnvClasses, typeEnvTyCons, emptyIfaceTable )
+import HscTypes
import FiniteMap ( FiniteMap, plusFM, emptyFM, addToFM )
import OccName ( OccName )
-import Name ( Name, nameModule, nameOccName, getName )
-import Name ( emptyNameEnv )
+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 {
- hPutStr stderr "compilation IS NOT required";
- when (verbosity dflags /= 1) $ hPutStrLn stderr "";
+ when (verbosity dflags >= 1) $
+ hPutStrLn stderr ("Skipping " ++
+ compMsg have_object mod location);
-- CLOSURE
(pcs_cl, closure_errs, cl_hs_decls)
else do {
-- TYPECHECK
- maybe_tc_result <- typecheckModule dflags pcs_cl hst
- old_iface alwaysQualify cl_hs_decls;
+ maybe_tc_result
+ <- typecheckIface dflags pcs_cl hst old_iface (vanillaSyntaxMap, cl_hs_decls);
+
case maybe_tc_result of {
Nothing -> return (HscFail pcs_cl);
- Just (pcs_tc, tc_result) -> do {
+ Just (pcs_tc, new_details) ->
- let env_tc = tc_env tc_result
- local_rules = tc_rules tc_result
- ;
- -- 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) $
- hPutStr stderr "compilation IS required";
- -- mode -v1 tries to keep everything on one line
- when (verbosity dflags > 1) $
- hPutStrLn stderr "";
+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
-------------------
-------------------
-- RENAME
-------------------
- ; (pcs_rn, maybe_rn_result)
- <- renameModule dflags hit hst pcs_ch this_mod rdr_module
+ ; (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_rn);
- Just (print_unqualified, (is_exported, new_iface, rn_hs_decls)) -> do {
+ 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
+
-------------------
-- TYPECHECK
-------------------
- ; maybe_tc_result <- typecheckModule dflags pcs_rn hst new_iface
- print_unqualified rn_hs_decls
+ ; 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_rn);
+ 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)
- <- deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
+ ; (ds_details, foreign_stuff)
+ <- _scc_ "DeSugar"
+ deSugar dflags pcs_tc hst this_mod print_unqualified tc_result
-------------------
- -- SIMPLIFY, TIDY-CORE
+ -- SIMPLIFY
-------------------
- -- We grab the the unfoldings at this point.
- ; (pcs_simpl, tidy_binds, orphan_rules)
- <- simplThenTidy dflags pcs_tc hst this_mod is_exported ds_binds ds_rules
-
+ ; simpl_details
+ <- _scc_ "Core2Core"
+ core2core dflags pcs_tc hst dont_discard ds_details
+
+ -------------------
+ -- 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)
+ <- tidyCorePgm dflags this_mod pcs_tc cg_info simpl_details
+
-------------------
- -- BUILD THE NEW ModDetails AND ModIface
+ -- PREPARE FOR CODE GENERATION
-------------------
- ; let new_details = mkModDetails env_tc tidy_binds orphan_rules
- ; final_iface <- mkFinalIface ghci_mode dflags location
- maybe_checked_iface new_iface new_details
+ -- Do saturation and convert to A-normal form
+ ; prepd_details <- corePrepPgm dflags tidy_details
-------------------
-- CONVERT TO STG and COMPLETE CODE GENERATION
-------------------
- ; (maybe_stub_h_filename, maybe_stub_c_filename, maybe_bcos)
- <- restOfCodeGeneration dflags toInterp this_mod
- (map ideclName (hsModuleImports rdr_module))
- foreign_stuff env_tc tidy_binds
- hit (pcs_PIT pcs_simpl)
+ ; let
+ ModDetails{md_binds=binds, md_types=env_tc} = prepd_details
- -- and the answer is ...
- ; return (HscRecomp pcs_simpl new_details final_iface
- maybe_stub_h_filename maybe_stub_c_filename
- maybe_bcos)
- }}}}}}}
+ 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 = []}
-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
+ -- and the answer is ...
+ ; return (HscRecomp pcs_simpl
+ final_details
+ final_iface
+ maybe_stub_h_filename maybe_stub_c_filename
+ maybe_bcos)
+ }}}}}}}
myParseModule dflags src_filename
= do -------------------------- Parser ----------------
showPass dflags "Parser"
- -- _scc_ "Parser"
+ _scc_ "Parser" do
buf <- hGetStringBuffer True{-expand tabs-} src_filename
loc = mkSrcLoc (_PK_ src_filename) 1 } of {
PFailed err -> do { hPutStrLn stderr (showSDoc err);
+ freeStringBuffer buf;
return Nothing };
POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) -> do {
(ppSourceStats False rdr_module) ;
return (Just rdr_module)
+ -- ToDo: free the string buffer later.
}}
-simplThenTidy dflags pcs hst this_mod is_exported binds rules
- = do -- Do main Core-language transformations ---------
- -- _scc_ "Core2Core"
- (simplified, orphan_rules)
- <- core2core dflags pcs hst is_exported binds rules
-
- -- Do saturation and convert to A-normal form
- -- NOTE: subsequent passes may not transform the syntax, only annotate it
- saturated <- coreSatPgm dflags simplified
-
- -- Do the final tidy-up
- (pcs', tidy_binds, tidy_orphan_rules)
- <- tidyCorePgm dflags this_mod pcs saturated 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)
- <- myCoreToStg dflags this_mod tidy_binds env_tc
-
- -------------------------- Code generation -------------------------------
- -- _scc_ "CodeGen"
- abstractC <- codeGen dflags this_mod imported_modules
- cost_centre_info fe_binders
- local_tycons stg_binds
-
- -------------------------- Code output -------------------------------
- -- _scc_ "CodeOutput"
- (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 tidy_binds
- -- _scc_ "Core2Stg"
- stg_binds <- coreToStg dflags this_mod tidy_binds
+ (stg_binds2, cost_centre_info)
+ <- _scc_ "Core2Stg" stg2stg dflags this_mod stg_binds
- -- _scc_ "Stg2Stg"
- (stg_binds2, cost_centre_info) <- stg2stg dflags this_mod stg_binds
+ 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)
+ 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}
%************************************************************************
%* *
-\subsection{Compiling an expression}
+\subsection{Compiling a do-statement}
%* *
%************************************************************************
\begin{code}
#ifdef GHCI
-hscExpr
+hscStmt
:: DynFlags
-> HomeSymbolTable
-> HomeIfaceTable
-> PersistentCompilerState -- IN: persistent compiler state
- -> Module -- Context for compiling
- -> String -- The expression
- -> Bool -- Should we wrap print if not IO-typed?
+ -> InteractiveContext -- Context for compiling
+ -> String -- The statement
+ -> Bool -- just treat it as an expression
-> IO ( PersistentCompilerState,
- Maybe (UnlinkedBCOExpr, PrintUnqualified, Type) )
+ 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
+the same length as the list of names; add them to the ClosureEnv.
+
+A naked expression returns a singleton Name [it].
+
+ What you type The IO [HValue] that hscStmt returns
+ ------------- ------------------------------------
+ let pat = expr ==> let pat = expr in return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
-hscExpr dflags hst hit pcs0 this_module expr wrap_print
- = do {
- maybe_parsed <- hscParseExpr dflags expr;
- case maybe_parsed of
+ pat <- expr ==> expr >>= \ pat -> return [coerce HVal x, coerce HVal y, ...]
+ bindings: [x,y,...]
+
+ expr (of IO type) ==> expr >>= \ v -> return [v]
+ [NB: result not printed] bindings: [it]
+
+
+ expr (of non-IO type,
+ result showable) ==> let v = expr in print v >> return [v]
+ bindings: [it]
+
+ expr (of non-IO type,
+ result not showable) ==> error
+
+\begin{code}
+hscStmt dflags hst hit pcs0 icontext stmt just_expr
+ = let
+ InteractiveContext {
+ ic_rn_env = rn_env,
+ ic_type_env = type_env,
+ ic_module = scope_mod } = icontext
+ in
+ do { maybe_stmt <- hscParseStmt dflags stmt
+ ; case maybe_stmt of
Nothing -> return (pcs0, Nothing)
- Just parsed_expr -> do {
+ 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, maybe_renamed_expr) <-
- renameExpr dflags hit hst pcs0 this_module parsed_expr;
- case maybe_renamed_expr of
- Nothing -> return ({-WAS:pcs1-} pcs0, Nothing)
- Just (print_unqual, rn_expr) -> do {
+ (pcs1, print_unqual, maybe_renamed_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
- <- typecheckExpr dflags pcs1 hst print_unqual this_module rn_expr;
- case maybe_tc_return of {
- Nothing -> return ({-WAS:pcs1-} pcs0, Nothing);
- Just (pcs2, tc_expr, ty) -> do
-
- -- if it isn't an IO-typed expression,
- -- wrap "print" around it & recompile...
- let { is_IO_type = case splitTyConApp_maybe ty of {
- Just (tycon, _) -> getUnique tycon == ioTyConKey;
- Nothing -> False }
- };
-
- if (wrap_print && not is_IO_type)
- then do (new_pcs, maybe_stuff)
- <- hscExpr dflags hst hit pcs2 this_module
- ("PrelIO.print (" ++ expr ++ ")") False
- case maybe_stuff of
- Nothing -> return (new_pcs, maybe_stuff)
- Just (bcos, _, _) ->
- return (new_pcs, Just (bcos, print_unqual, ty))
- else 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_module
- 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;
+ ; 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
- -- ToDo: need to do SRTs?
+ -- 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 "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
- return (pcs2, Just (bcos, print_unqual, ty));
- }}}}
+ ; return (pcs2, Just (global_bound_ids, ty, bcos))
-hscParseExpr :: DynFlags -> String -> IO (Maybe RdrNameHsExpr)
-hscParseExpr dflags str
+ }}}}}
+
+hscParseStmt :: DynFlags -> String -> IO (Maybe RdrNameStmt)
+hscParseStmt dflags str
= do -------------------------- Parser ----------------
showPass dflags "Parser"
- -- _scc_ "Parser"
+ _scc_ "Parser" do
buf <- stringToStringBuffer str
let glaexts | dopt Opt_GlasgowExts dflags = 1#
- | otherwise = 0#
+ | otherwise = 0#
- case parseExpr buf PState{ bol = 0#, atbol = 1#,
+ case parseStmt buf PState{ bol = 0#, atbol = 1#,
context = [], glasgow_exts = glaexts,
loc = mkSrcLoc SLIT("<no file>") 0 } of {
PFailed err -> do { hPutStrLn stderr (showSDoc err);
- freeStringBuffer buf;
+-- Not yet implemented in <4.11 freeStringBuffer buf;
return Nothing };
- POk _ rdr_expr -> do {
+ -- no stmt: the line consisted of just space or comments
+ POk _ Nothing -> return Nothing;
+
+ POk _ (Just rdr_stmt) -> 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_expr);
- return (Just rdr_expr)
+ dumpIfSet_dyn dflags Opt_D_dump_parsed "Parser" (ppr rdr_stmt);
+ return (Just rdr_stmt)
}}
#endif
\end{code}
projects / ghc-hetmet.git / blobdiff