\section[GHC_Main]{Main driver for Glasgow Haskell compiler}
\begin{code}
-module HscMain (
- HscResult(..),
- hscMain, newHscEnv, hscCmmFile,
- hscFileCheck,
- hscParseIdentifier,
+module HscMain
+ ( newHscEnv, hscCmmFile
+ , hscFileCheck
+ , hscParseIdentifier
#ifdef GHCI
- hscStmt, hscTcExpr, hscKcType,
- compileExpr,
+ , hscStmt, hscTcExpr, hscKcType
+ , compileExpr
#endif
- ) where
+ , hscCompileOneShot -- :: Compiler HscStatus
+ , hscCompileMake -- :: Compiler (HscStatus, ModIface, ModDetails)
+ , hscCompileInteractive -- :: Compiler (InteractiveStatus, ModIface, ModDetails)
+ , HscStatus (..)
+ , InteractiveStatus (..)
+ , HscChecked (..)
+ ) where
#include "HsVersions.h"
import LoadIface ( ifaceStats, initExternalPackageState )
import PrelInfo ( wiredInThings, basicKnownKeyNames )
import MkIface ( checkOldIface, mkIface, writeIfaceFile )
-import Desugar
+import Desugar ( deSugar )
import Flattening ( flatten )
-import SimplCore
+import SimplCore ( core2core )
import TidyPgm ( tidyProgram, mkBootModDetails )
import CorePrep ( corePrepPgm )
import CoreToStg ( coreToStg )
import DynFlags
import ErrUtils
-import Util
import UniqSupply ( mkSplitUniqSupply )
import Outputable
import Maybes ( expectJust )
import Bag ( unitBag )
import Monad ( when )
-import Maybe ( isJust )
import IO
import DATA_IOREF ( newIORef, readIORef )
\end{code}
%* *
%************************************************************************
+ --------------------------------
+ The compilation proper
+ --------------------------------
+
+
+It's the task of the compilation proper to compile Haskell, hs-boot and
+core files to either byte-code, hard-code (C, asm, Java, ect) or to
+nothing at all (the module is still parsed and type-checked. This
+feature is mostly used by IDE's and the likes).
+Compilation can happen in either 'one-shot', 'make', or 'interactive'
+mode. 'One-shot' mode targets hard-code, 'make' mode targets hard-code
+and nothing, and 'interactive' mode targets byte-code. The modes are
+kept separate because of their different types.
+In 'one-shot' mode, we're only compiling a single file and can therefore
+discard the new ModIface and ModDetails. This is also the reason it only
+targets hard-code; compiling to byte-code or nothing doesn't make sense
+when we discard the result. 'Make' mode is like 'one-shot' except that we
+keep the resulting ModIface and ModDetails. 'Make' mode doesn't target
+byte-code since that require us to return the newly compiled byte-code.
+'Interactive' mode is similar to 'make' mode except that we return
+the compiled byte-code together with the ModIface and ModDetails.
+Trying to compile a hs-boot file to byte-code will result in a run-time
+error. This is the only thing that isn't caught by the type-system.
+
\begin{code}
-data HscResult
- -- Compilation failed
- = HscFail
- -- In IDE mode: we just do the static/dynamic checks
- | HscChecked
+data HscChecked
+ = HscChecked
-- parsed
- (Located (HsModule RdrName))
+ (Located (HsModule RdrName))
-- renamed
- (Maybe (HsGroup Name,[LImportDecl Name],Maybe [LIE Name]))
+ (Maybe (HsGroup Name,[LImportDecl Name],Maybe [LIE Name]))
-- typechecked
- (Maybe (LHsBinds Id, GlobalRdrEnv, ModDetails))
-
- -- Concluded that it wasn't necessary
- | HscNoRecomp ModDetails -- new details (HomeSymbolTable additions)
- ModIface -- new iface (if any compilation was done)
-
- -- Did recompilation
- | HscRecomp ModDetails -- new details (HomeSymbolTable additions)
- ModIface -- new iface (if any compilation was done)
- Bool -- stub_h exists
- Bool -- stub_c exists
- (Maybe CompiledByteCode)
-
-
--- What to do when we have compiler error or warning messages
-type MessageAction = Messages -> IO ()
+ (Maybe (LHsBinds Id, GlobalRdrEnv, ModDetails))
---------------------------------------------------------------
--- Exterimental code start.
---------------------------------------------------------------
-
+-- Status of a compilation to hard-code or nothing.
data HscStatus
- = NewHscNoRecomp
- | NewHscRecomp Bool -- Has stub files.
- -- This is a hack. We can't compile C files here
- -- since it's done in DriverPipeline. For now we
- -- just return True if we want the caller to compile
- -- it for us.
-
+ = HscNoRecomp
+ | HscRecomp Bool -- Has stub files.
+ -- This is a hack. We can't compile C files here
+ -- since it's done in DriverPipeline. For now we
+ -- just return True if we want the caller to compile
+ -- it for us.
+
+-- Status of a compilation to byte-code.
data InteractiveStatus
= InteractiveNoRecomp
| InteractiveRecomp Bool -- Same as HscStatus
-> IO (Maybe result)
+-- This functions checks if recompilation is necessary and
+-- then combines the FrontEnd, BackEnd and CodeGen to a
+-- working compiler.
hscMkCompiler :: NoRecomp result -- What to do when recompilation isn't required.
-> FrontEnd core
-> BackEnd core prepCore
result <- codegen hsc_env mod_summary prepCore
return (Just result)
+--------------------------------------------------------------
+-- Compilers
+--------------------------------------------------------------
+
-- Compile Haskell, boot and extCore in OneShot mode.
hscCompileOneShot :: Compiler HscStatus
hscCompileOneShot hsc_env mod_summary =
compiler hsc_env mod_summary
- where mkComp = hscMkCompiler (norecompOneShot NewHscNoRecomp)
+ where mkComp = hscMkCompiler (norecompOneShot HscNoRecomp)
compiler
= case ms_hsc_src mod_summary of
ExtCoreFile
-> mkComp hscFileFrontEnd hscNewBackEnd hscCodeGenOneShot
HsBootFile
-> mkComp hscFileFrontEnd hscNewBootBackEnd
- (hscCodeGenConst (NewHscRecomp False))
+ (hscCodeGenConst (HscRecomp False))
-- Compile Haskell, boot and extCore in --make mode.
hscCompileMake :: Compiler (HscStatus, ModIface, ModDetails)
hscCompileMake hsc_env mod_summary
= compiler hsc_env mod_summary
where mkComp = hscMkCompiler norecompMake
+ backend = case hscTarget (hsc_dflags hsc_env) of
+ HscNothing -> hscCodeGenNothing
+ _other -> hscCodeGenMake
compiler
= case ms_hsc_src mod_summary of
ExtCoreFile
- -> mkComp hscCoreFrontEnd hscNewBackEnd hscCodeGenMake
+ -> mkComp hscCoreFrontEnd hscNewBackEnd backend
HsSrcFile
- -> mkComp hscFileFrontEnd hscNewBackEnd hscCodeGenMake
+ -> mkComp hscFileFrontEnd hscNewBackEnd backend
HsBootFile
-> mkComp hscFileFrontEnd hscNewBootBackEnd hscCodeGenIdentity
--- Same as 'hscCompileMake' but don't generate any actual code.
-hscCompileMakeNothing :: Compiler (HscStatus, ModIface, ModDetails)
-hscCompileMakeNothing hsc_env mod_summary
- = compiler hsc_env mod_summary
- where mkComp = hscMkCompiler norecompMake
- codeGen = hscCodeGenSimple (\(i, d, g) -> (NewHscRecomp False, i, d))
- compiler
- = case ms_hsc_src mod_summary of
- ExtCoreFile
- -> mkComp hscCoreFrontEnd hscNewBackEnd
- codeGen
- HsSrcFile
- -> mkComp hscFileFrontEnd hscNewBackEnd
- codeGen
- HsBootFile
- -> mkComp hscFileFrontEnd hscNewBootBackEnd
- hscCodeGenIdentity
-- Compile Haskell, extCore to bytecode.
hscCompileInteractive :: Compiler (InteractiveStatus, ModIface, ModDetails)
bootErrorMsg = "Compiling a HsBootFile to bytecode doesn't make sense. " ++
"Use 'hscCompileMake' instead."
+--------------------------------------------------------------
+-- NoRecomp handlers
+--------------------------------------------------------------
+
norecompOneShot :: a -> NoRecomp a
norecompOneShot a hsc_env mod_summary
have_object old_iface
return a
norecompMake :: NoRecomp (HscStatus, ModIface, ModDetails)
-norecompMake = norecompWorker NewHscNoRecomp
+norecompMake = norecompWorker HscNoRecomp
norecompInteractive :: NoRecomp (InteractiveStatus, ModIface, ModDetails)
norecompInteractive = norecompWorker InteractiveNoRecomp
dumpIfaceStats hsc_env
return (a, old_iface, new_details)
+--------------------------------------------------------------
+-- FrontEnds
+--------------------------------------------------------------
+
+hscCoreFrontEnd :: FrontEnd ModGuts
+hscCoreFrontEnd hsc_env mod_summary mb_mod_index = do {
+ -------------------
+ -- PARSE
+ -------------------
+ ; inp <- readFile (expectJust "hscCoreFrontEnd" (ms_hspp_file mod_summary))
+ ; case parseCore inp 1 of
+ FailP s -> do errorMsg (hsc_dflags hsc_env) (text s{-ToDo: wrong-})
+ return Nothing
+ OkP rdr_module -> do {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ ; (tc_msgs, maybe_tc_result) <- {-# SCC "TypeCheck" #-}
+ tcRnExtCore hsc_env rdr_module
+ ; printErrorsAndWarnings (hsc_dflags hsc_env) tc_msgs
+ ; case maybe_tc_result of
+ Nothing -> return Nothing
+ Just mod_guts -> return (Just mod_guts) -- No desugaring to do!
+ }}
+
+hscFileFrontEnd :: FrontEnd ModGuts
+hscFileFrontEnd hsc_env mod_summary mb_mod_index = do {
+ -------------------
+ -- DISPLAY PROGRESS MESSAGE
+ -------------------
+ ; let dflags = hsc_dflags hsc_env
+ one_shot = isOneShot (ghcMode dflags)
+ toInterp = hscTarget dflags == HscInterpreted
+ ; when (not one_shot) $
+ compilationProgressMsg dflags $
+ (showModuleIndex mb_mod_index ++
+ "Compiling " ++ showModMsg (not toInterp) mod_summary)
+
+ -------------------
+ -- PARSE
+ -------------------
+ ; let hspp_file = expectJust "hscFileFrontEnd" (ms_hspp_file mod_summary)
+ hspp_buf = ms_hspp_buf mod_summary
+
+ ; maybe_parsed <- myParseModule dflags hspp_file hspp_buf
+
+ ; case maybe_parsed of {
+ Left err -> do { printBagOfErrors dflags (unitBag err)
+ ; return Nothing } ;
+ Right rdr_module -> do {
+
+ -------------------
+ -- RENAME and TYPECHECK
+ -------------------
+ (tc_msgs, maybe_tc_result)
+ <- {-# SCC "Typecheck-Rename" #-}
+ tcRnModule hsc_env (ms_hsc_src mod_summary) False rdr_module
+
+ ; printErrorsAndWarnings dflags tc_msgs
+ ; case maybe_tc_result of {
+ Nothing -> return Nothing ;
+ Just tc_result -> do {
+
+ -------------------
+ -- DESUGAR
+ -------------------
+ ; (warns, maybe_ds_result) <- {-# SCC "DeSugar" #-}
+ deSugar hsc_env tc_result
+ ; printBagOfWarnings dflags warns
+ ; return maybe_ds_result
+ }}}}}
+
+--------------------------------------------------------------
+-- BackEnds
+--------------------------------------------------------------
+
hscNewBootBackEnd :: BackEnd ModGuts (HscStatus, ModIface, ModDetails)
hscNewBootBackEnd hsc_env mod_summary maybe_old_iface ds_result
= do details <- mkBootModDetails hsc_env ds_result
writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
-- And the answer is ...
dumpIfaceStats hsc_env
- return (NewHscRecomp False, new_iface, details)
+ return (HscRecomp False, new_iface, details)
hscNewBackEnd :: BackEnd ModGuts (ModIface, ModDetails, CgGuts)
hscNewBackEnd hsc_env mod_summary maybe_old_iface ds_result
; return (new_iface, details, cg_guts)
}
+--------------------------------------------------------------
+-- Code generators
+--------------------------------------------------------------
+
-- Don't output any code.
hscCodeGenNothing :: CodeGen (ModIface, ModDetails, CgGuts) (HscStatus, ModIface, ModDetails)
hscCodeGenNothing hsc_env mod_summary (iface, details, cgguts)
- = return (NewHscRecomp False, iface, details)
+ = return (HscRecomp False, iface, details)
-- Generate code and return both the new ModIface and the ModDetails.
hscCodeGenMake :: CodeGen (ModIface, ModDetails, CgGuts) (HscStatus, ModIface, ModDetails)
hscCodeGenMake hsc_env mod_summary (iface, details, cgguts)
= do hasStub <- hscCodeGenCompile hsc_env mod_summary cgguts
- return (NewHscRecomp hasStub, iface, details)
+ return (HscRecomp hasStub, iface, details)
-- Here we don't need the ModIface and ModDetails anymore.
hscCodeGenOneShot :: CodeGen (ModIface, ModDetails, CgGuts) HscStatus
hscCodeGenOneShot hsc_env mod_summary (_, _, cgguts)
= do hasStub <- hscCodeGenCompile hsc_env mod_summary cgguts
- return (NewHscRecomp hasStub)
+ return (HscRecomp hasStub)
hscCodeGenCompile :: CodeGen CgGuts Bool
hscCodeGenCompile hsc_env mod_summary cgguts
cg_dep_pkgs = dependencies } = cgguts
dflags = hsc_dflags hsc_env
location = ms_location mod_summary
- modName = ms_mod mod_summary
data_tycons = filter isDataTyCon tycons
-- cg_tycons includes newtypes, for the benefit of External Core,
-- but we don't generate any code for newtypes
hscCodeGenIdentity :: CodeGen a a
hscCodeGenIdentity hsc_env mod_summary a = return a
-hscCodeGenSimple :: (a -> b) -> CodeGen a b
-hscCodeGenSimple fn hsc_env mod_summary a = return (fn a)
-
hscCodeGenConst :: b -> CodeGen a b
hscCodeGenConst b hsc_env mod_summary a = return b
cg_dep_pkgs = dependencies } = cgguts
dflags = hsc_dflags hsc_env
location = ms_location mod_summary
- modName = ms_mod mod_summary
data_tycons = filter isDataTyCon tycons
-- cg_tycons includes newtypes, for the benefit of External Core,
-- but we don't generate any code for newtypes
#endif
-
---------------------------------------------------------------
--- Exterimental code end.
---------------------------------------------------------------
-
- -- no errors or warnings; the individual passes
- -- (parse/rename/typecheck) print messages themselves
-
-hscMain
- :: HscEnv
- -> ModSummary
- -> Bool -- True <=> source unchanged
- -> Bool -- True <=> have an object file (for msgs only)
- -> Maybe ModIface -- Old interface, if available
- -> Maybe (Int, Int) -- Just (i,n) <=> module i of n (for msgs)
- -> IO HscResult
-
-hscMain hsc_env mod_summary
- source_unchanged have_object maybe_old_iface
- mb_mod_index
- = do {
- (recomp_reqd, maybe_checked_iface) <-
- {-# SCC "checkOldIface" #-}
- checkOldIface hsc_env mod_summary
- source_unchanged maybe_old_iface;
-
- let no_old_iface = not (isJust maybe_checked_iface)
- what_next | recomp_reqd || no_old_iface = hscRecomp
- | otherwise = hscNoRecomp
-
- ; what_next hsc_env mod_summary have_object
- maybe_checked_iface
- mb_mod_index
- }
-
-
-------------------------------
-hscNoRecomp hsc_env mod_summary
- have_object (Just old_iface)
- mb_mod_index
- | isOneShot (ghcMode (hsc_dflags hsc_env))
- = do {
- compilationProgressMsg (hsc_dflags hsc_env) $
- "compilation IS NOT required";
- dumpIfaceStats hsc_env ;
-
- let { bomb = panic "hscNoRecomp:OneShot" };
- return (HscNoRecomp bomb bomb)
- }
- | otherwise
- = do { compilationProgressMsg (hsc_dflags hsc_env) $
- (showModuleIndex mb_mod_index ++
- "Skipping " ++ showModMsg have_object mod_summary)
-
- ; new_details <- {-# SCC "tcRnIface" #-}
- initIfaceCheck hsc_env $
- typecheckIface old_iface ;
- ; dumpIfaceStats hsc_env
-
- ; return (HscNoRecomp new_details old_iface)
- }
-
-hscNoRecomp hsc_env mod_summary
- have_object Nothing
- mb_mod_index
- = panic "hscNoRecomp" -- hscNoRecomp definitely expects to
- -- have the old interface available
-
-------------------------------
-hscRecomp hsc_env mod_summary
- have_object maybe_old_iface
- mb_mod_index
- = case ms_hsc_src mod_summary of
- HsSrcFile -> do
- front_res <- hscFileFrontEnd hsc_env mod_summary mb_mod_index
- case ghcMode (hsc_dflags hsc_env) of
- JustTypecheck -> hscBootBackEnd hsc_env mod_summary maybe_old_iface front_res
- _ -> hscBackEnd hsc_env mod_summary maybe_old_iface front_res
-
- HsBootFile -> do
- front_res <- hscFileFrontEnd hsc_env mod_summary mb_mod_index
- hscBootBackEnd hsc_env mod_summary maybe_old_iface front_res
-
- ExtCoreFile -> do
- front_res <- hscCoreFrontEnd hsc_env mod_summary mb_mod_index
- hscBackEnd hsc_env mod_summary maybe_old_iface front_res
-
-hscCoreFrontEnd hsc_env mod_summary mb_mod_index = do {
- -------------------
- -- PARSE
- -------------------
- ; inp <- readFile (expectJust "hscCoreFrontEnd" (ms_hspp_file mod_summary))
- ; case parseCore inp 1 of
- FailP s -> errorMsg (hsc_dflags hsc_env) (text s{-ToDo: wrong-}) >> return Nothing
- OkP rdr_module -> do {
-
- -------------------
- -- RENAME and TYPECHECK
- -------------------
- ; (tc_msgs, maybe_tc_result) <- {-# SCC "TypeCheck" #-}
- tcRnExtCore hsc_env rdr_module
- ; printErrorsAndWarnings (hsc_dflags hsc_env) tc_msgs
- ; case maybe_tc_result of
- Nothing -> return Nothing
- Just mod_guts -> return (Just mod_guts) -- No desugaring to do!
- }}
-
-
-hscFileFrontEnd hsc_env mod_summary mb_mod_index = do {
- -------------------
- -- DISPLAY PROGRESS MESSAGE
- -------------------
- ; let dflags = hsc_dflags hsc_env
- one_shot = isOneShot (ghcMode dflags)
- toInterp = hscTarget dflags == HscInterpreted
- ; when (not one_shot) $
- compilationProgressMsg dflags $
- (showModuleIndex mb_mod_index ++
- "Compiling " ++ showModMsg (not toInterp) mod_summary)
-
- -------------------
- -- PARSE
- -------------------
- ; let hspp_file = expectJust "hscFileFrontEnd" (ms_hspp_file mod_summary)
- hspp_buf = ms_hspp_buf mod_summary
-
- ; maybe_parsed <- myParseModule dflags hspp_file hspp_buf
-
- ; case maybe_parsed of {
- Left err -> do { printBagOfErrors dflags (unitBag err)
- ; return Nothing } ;
- Right rdr_module -> do {
-
- -------------------
- -- RENAME and TYPECHECK
- -------------------
- (tc_msgs, maybe_tc_result)
- <- {-# SCC "Typecheck-Rename" #-}
- tcRnModule hsc_env (ms_hsc_src mod_summary) False rdr_module
-
- ; printErrorsAndWarnings dflags tc_msgs
- ; case maybe_tc_result of {
- Nothing -> return Nothing ;
- Just tc_result -> do {
-
- -------------------
- -- DESUGAR
- -------------------
- ; (warns, maybe_ds_result) <- {-# SCC "DeSugar" #-}
- deSugar hsc_env tc_result
- ; printBagOfWarnings dflags warns
- ; return maybe_ds_result
- }}}}}
-
------------------------------
-hscFileCheck :: HscEnv -> ModSummary -> IO HscResult
+hscFileCheck :: HscEnv -> ModSummary -> IO (Maybe HscChecked)
hscFileCheck hsc_env mod_summary = do {
-------------------
-- PARSE
; case maybe_parsed of {
Left err -> do { printBagOfErrors dflags (unitBag err)
- ; return HscFail } ;
+ ; return Nothing } ;
Right rdr_module -> do {
-------------------
; printErrorsAndWarnings dflags tc_msgs
; case maybe_tc_result of {
- Nothing -> return (HscChecked rdr_module Nothing Nothing);
+ Nothing -> return (Just (HscChecked rdr_module Nothing Nothing));
Just tc_result -> do
let md = ModDetails {
md_types = tcg_type_env tc_result,
imports <- tcg_rn_imports tc_result
let exports = tcg_rn_exports tc_result
return (decl,imports,exports)
- return (HscChecked rdr_module
+ return (Just (HscChecked rdr_module
rnInfo
(Just (tcg_binds tc_result,
tcg_rdr_env tc_result,
- md)))
+ md))))
}}}}
-------------------------------
-hscBootBackEnd :: HscEnv -> ModSummary -> Maybe ModIface -> Maybe ModGuts -> IO HscResult
--- For hs-boot files, there's no code generation to do
-
-hscBootBackEnd hsc_env mod_summary maybe_old_iface Nothing
- = return HscFail
-hscBootBackEnd hsc_env mod_summary maybe_old_iface (Just ds_result)
- = do { details <- mkBootModDetails hsc_env ds_result
-
- ; (new_iface, no_change)
- <- {-# SCC "MkFinalIface" #-}
- mkIface hsc_env maybe_old_iface ds_result details
-
- ; writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
-
- -- And the answer is ...
- ; dumpIfaceStats hsc_env
-
- ; return (HscRecomp details new_iface
- False False Nothing)
- }
-
-------------------------------
-hscBackEnd :: HscEnv -> ModSummary -> Maybe ModIface -> Maybe ModGuts -> IO HscResult
-
-hscBackEnd hsc_env mod_summary maybe_old_iface Nothing
- = return HscFail
-
-hscBackEnd hsc_env mod_summary maybe_old_iface (Just ds_result)
- = do { -- OMITTED:
- -- ; seqList imported_modules (return ())
-
- let one_shot = isOneShot (ghcMode dflags)
- dflags = hsc_dflags hsc_env
-
- -------------------
- -- FLATTENING
- -------------------
- ; flat_result <- {-# SCC "Flattening" #-}
- flatten hsc_env ds_result
-
-
-{- TEMP: need to review space-leak fixing here
- NB: even the code generator can force one of the
- thunks for constructor arguments, for newtypes in particular
-
- ; let -- Rule-base accumulated from imported packages
- pkg_rule_base = eps_rule_base (hsc_EPS hsc_env)
-
- -- In one-shot mode, ZAP the external package state at
- -- this point, because we aren't going to need it from
- -- now on. We keep the name cache, however, because
- -- tidyCore needs it.
- pcs_middle
- | one_shot = pcs_tc{ pcs_EPS = error "pcs_EPS missing" }
- | otherwise = pcs_tc
-
- ; pkg_rule_base `seq` pcs_middle `seq` return ()
--}
-
- -- alive at this point:
- -- pcs_middle
- -- flat_result
- -- pkg_rule_base
-
- -------------------
- -- SIMPLIFY
- -------------------
- ; simpl_result <- {-# SCC "Core2Core" #-}
- core2core hsc_env flat_result
-
- -------------------
- -- TIDY
- -------------------
- ; (cg_guts, details) <- {-# SCC "CoreTidy" #-}
- tidyProgram hsc_env simpl_result
-
- -- Alive at this point:
- -- tidy_result, pcs_final
- -- hsc_env
-
- -------------------
- -- BUILD THE NEW ModIface and ModDetails
- -- and emit external core if necessary
- -- This has to happen *after* code gen so that the back-end
- -- info has been set. Not yet clear if it matters waiting
- -- until after code output
- ; (new_iface, no_change)
- <- {-# SCC "MkFinalIface" #-}
- mkIface hsc_env maybe_old_iface simpl_result details
-
- ; writeIfaceFile hsc_env (ms_location mod_summary) new_iface no_change
-
- -- Space leak reduction: throw away the new interface if
- -- we're in one-shot mode; we won't be needing it any
- -- more.
- ; final_iface <- if one_shot then return (error "no final iface")
- else return new_iface
-
- -- Build the final ModDetails (except in one-shot mode, where
- -- we won't need this information after compilation).
- ; final_details <- if one_shot then return (error "no final details")
- else return $! details
-
- -- Emit external core
- ; emitExternalCore dflags cg_guts
-
- -------------------
- -- CONVERT TO STG and COMPLETE CODE GENERATION
- ; (stub_h_exists, stub_c_exists, maybe_bcos)
- <- hscCodeGen dflags (ms_location mod_summary) cg_guts
-
- -- And the answer is ...
- ; dumpIfaceStats hsc_env
-
- ; return (HscRecomp final_details
- final_iface
- stub_h_exists stub_c_exists
- maybe_bcos)
- }
-
-
-
-hscCodeGen dflags location
- CgGuts{ -- This is the last use of the ModGuts in a compilation.
- -- From now on, we just use the bits we need.
- cg_module = this_mod,
- cg_binds = core_binds,
- cg_tycons = tycons,
- cg_dir_imps = dir_imps,
- cg_foreign = foreign_stubs,
- cg_home_mods = home_mods,
- cg_dep_pkgs = dependencies } = do {
-
- let { data_tycons = filter isDataTyCon tycons } ;
- -- cg_tycons includes newtypes, for the benefit of External Core,
- -- but we don't generate any code for newtypes
-
- -------------------
- -- PREPARE FOR CODE GENERATION
- -- Do saturation and convert to A-normal form
- prepd_binds <- {-# SCC "CorePrep" #-}
- corePrepPgm dflags core_binds data_tycons ;
-
- case hscTarget dflags of
- HscNothing -> return (False, False, Nothing)
-
- HscInterpreted ->
-#ifdef GHCI
- do ----------------- Generate byte code ------------------
- comp_bc <- byteCodeGen dflags prepd_binds data_tycons
-
- ------------------ Create f-x-dynamic C-side stuff ---
- (istub_h_exists, istub_c_exists)
- <- outputForeignStubs dflags this_mod location foreign_stubs
-
- 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) <- {-# SCC "CoreToStg" #-}
- myCoreToStg dflags home_mods this_mod prepd_binds
-
- ------------------ Code generation ------------------
- abstractC <- {-# SCC "CodeGen" #-}
- codeGen dflags home_mods this_mod data_tycons
- foreign_stubs dir_imps cost_centre_info
- stg_binds
-
- ------------------ Code output -----------------------
- (stub_h_exists, stub_c_exists)
- <- codeOutput dflags this_mod location foreign_stubs
- dependencies abstractC
-
- return (stub_h_exists, stub_c_exists, Nothing)
- }
-
hscCmmFile :: DynFlags -> FilePath -> IO Bool
hscCmmFile dflags filename = do
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