2 % (c) The GRASP/AQUA Project, Glasgow University, 1993-1996
4 \section[GHC_Main]{Main driver for Glasgow Haskell compiler}
7 module Main ( main ) where
9 #include "HsVersions.h"
11 import IO ( IOMode(..),
12 hGetContents, hPutStr, hClose, openFile,
13 stdin,stderr, hPutStrLn
16 import RdrHsSyn ( RdrName )
17 import BasicTypes ( NewOrData(..) )
19 import ReadPrefix ( rdModule )
20 import Rename ( renameModule )
21 import RnMonad ( ExportEnv )
23 import MkIface -- several functions
24 import TcModule ( typecheckModule )
25 import Desugar ( deSugar, pprDsWarnings )
26 import SimplCore ( core2core )
27 import CoreToStg ( topCoreBindsToStg )
28 import StgSyn ( collectFinalStgBinders, pprStgBindings )
29 import SimplStg ( stg2stg )
30 import CodeGen ( codeGen )
31 #if ! OMIT_NATIVE_CODEGEN
32 import AsmCodeGen ( dumpRealAsm, writeRealAsm )
35 import AbsCSyn ( absCNop, AbstractC )
36 import AbsCUtils ( flattenAbsC )
37 import CoreUnfold ( Unfolding )
38 import Bag ( emptyBag, isEmptyBag )
40 import ErrUtils ( pprBagOfErrors, ghcExit, doIfSet, dumpIfSet )
41 import Maybes ( maybeToBool, MaybeErr(..) )
42 import StgSyn ( GenStgBinding )
43 import TcInstUtil ( InstInfo )
44 import TyCon ( isDataTyCon )
45 import Class ( classTyCon )
46 import UniqSupply ( mkSplitUniqSupply )
48 import PprAbsC ( dumpRealC, writeRealC )
49 import PprCore ( pprCoreBinding )
50 import FiniteMap ( emptyFM )
52 import Char ( isSpace )
53 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
56 import IOExts ( unsafePerformIO )
57 import NativeInfo ( os, arch )
66 cmd_line_info = classifyOpts
72 doIt :: ([CoreToDo], [StgToDo]) -> IO ()
74 doIt (core_cmds, stg_cmds) =
76 (hPutStr stderr "Glasgow Haskell Compiler, version" >>
77 hPutStr stderr compiler_version >>
78 hPutStr stderr ", for Haskell 1.4\n") >>
83 rdModule >>= \ (mod_name, rdr_module) ->
85 dumpIfSet opt_D_dump_rdr "Reader" (ppr rdr_module) >>
87 dumpIfSet opt_D_source_stats "Source Statistics"
88 (ppSourceStats False rdr_module) >>
90 -- UniqueSupplies for later use (these are the only lower case uniques)
92 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
94 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
96 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
98 mkSplitUniqSupply 's' >>= \ sm_uniqs -> -- core-to-core simplifier
100 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
102 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
104 mkSplitUniqSupply 'f' >>= \ fl_uniqs -> -- absC flattener
106 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
109 show_pass "Renamer" >>
112 renameModule rn_uniqs rdr_module >>=
114 case maybe_rn_stuff of {
115 Nothing -> -- Hurrah! Renamer reckons that there's no need to
117 reportCompile (_UNPK_ mod_name) "Compilation NOT required!" >>
120 Just (rn_mod, iface_file_stuff, rn_name_supply, imported_modules) ->
121 -- Oh well, we've got to recompile for real
124 -- Safely past renaming: we can start the interface file:
125 -- (the iface file is produced incrementally, as we have
126 -- the information that we need...; we use "iface<blah>")
127 -- "endIface" finishes the job.
128 startIface mod_name >>= \ if_handle ->
129 ifaceMain if_handle iface_file_stuff >>
132 -- ******* TYPECHECKER
133 show_pass "TypeCheck" >>
135 typecheckModule tc_uniqs rn_name_supply rn_mod >>= \ maybe_tc_stuff ->
136 case maybe_tc_stuff of {
137 Nothing -> ghcExit 1; -- Type checker failed
140 local_tycons, local_classes, inst_info,
146 show_pass "DeSugar" >>
148 deSugar ds_uniqs mod_name all_binds fo_decls >>= \ (desugared, hc_code, h_code, c_code) ->
151 -- ******* CORE-TO-CORE SIMPLIFICATION
152 show_pass "Core2Core" >>
155 local_data_tycons = filter isDataTyCon local_tycons
157 core2core core_cmds mod_name
158 sm_uniqs local_data_tycons desugared
163 -- ******* STG-TO-STG SIMPLIFICATION
164 show_pass "Core2Stg" >>
167 stg_binds = topCoreBindsToStg c2s_uniqs simplified
170 show_pass "Stg2Stg" >>
172 stg2stg stg_cmds mod_name st_uniqs stg_binds
174 \ (stg_binds2, cost_centre_info) ->
176 dumpIfSet opt_D_dump_stg "STG syntax:" (pprStgBindings stg_binds2) >>
178 -- Dump instance decls and type signatures into the interface file
180 final_ids = collectFinalStgBinders stg_binds2
183 ifaceDecls if_handle local_tycons local_classes inst_info final_ids simplified >>
184 endIface if_handle >>
185 -- We are definitely done w/ interface-file stuff at this point:
186 -- (See comments near call to "startIface".)
188 -- ******* "ABSTRACT", THEN "FLAT", THEN *REAL* C!
189 show_pass "CodeGen" >>
192 all_local_data_tycons = filter isDataTyCon (map classTyCon local_classes)
194 -- Generate info tables for the data constrs arising
195 -- from class decls as well
197 all_tycon_specs = emptyFM -- Not specialising tycons any more
199 abstractC = codeGen mod_name -- module name for CC labelling
201 imported_modules -- import names for CC registering
202 all_local_data_tycons -- type constructors generated locally
203 all_tycon_specs -- tycon specialisations
206 flat_abstractC = flattenAbsC fl_uniqs abstractC
208 dumpIfSet opt_D_dump_absC "Abstract C"
209 (dumpRealC abstractC hc_code) >>
211 dumpIfSet opt_D_dump_flatC "Flat Abstract C"
212 (dumpRealC flat_abstractC hc_code) >>
214 show_pass "CodeOutput" >>
216 -- You can have C (c_output) or assembly-language (ncg_output),
217 -- but not both. [Allowing for both gives a space leak on
218 -- flat_abstractC. WDP 94/10]
220 (flat_absC_c, flat_absC_ncg) =
221 case (maybeToBool opt_ProduceC || opt_D_dump_realC,
222 maybeToBool opt_ProduceS || opt_D_dump_asm) of
223 (True, False) -> (flat_abstractC, absCNop)
224 (False, True) -> (absCNop, flat_abstractC)
225 (False, False) -> (absCNop, absCNop)
226 (True, True) -> error "ERROR: Can't do both .hc and .s at the same time"
228 c_output_d = dumpRealC flat_absC_c hc_code
229 c_output_w = (\ f -> writeRealC f flat_absC_c hc_code)
231 -- C stubs for "foreign export"ed functions.
232 stub_c_output_d = pprCode CStyle c_code
233 stub_c_output_w = showSDoc stub_c_output_d
235 -- Header file protos for "foreign export"ed functions.
236 stub_h_output_d = pprCode CStyle h_code
237 stub_h_output_w = showSDoc stub_h_output_d
239 #if OMIT_NATIVE_CODEGEN
240 ncg_output_d = error "*** GHC not built with a native-code generator ***"
241 ncg_output_w = ncg_output_d
243 ncg_output_d = dumpRealAsm flat_absC_ncg ncg_uniqs
244 ncg_output_w = (\ f -> writeRealAsm f flat_absC_ncg ncg_uniqs)
248 dumpIfSet opt_D_dump_asm "Asm code" ncg_output_d >>
249 doOutput opt_ProduceS ncg_output_w >>
251 dumpIfSet opt_D_dump_realC "Real C" c_output_d >>
252 doOutput opt_ProduceC c_output_w >>
254 dumpIfSet opt_D_dump_foreign "Foreign export header file" stub_h_output_d >>
255 outputHStub opt_ProduceExportHStubs stub_h_output_w >>
257 dumpIfSet opt_D_dump_foreign "Foreign export stubs" stub_c_output_d >>
258 outputCStub mod_name opt_ProduceExportCStubs stub_c_output_w >>
260 reportCompile (_UNPK_ mod_name) (showSDoc (ppSourceStats True rdr_module)) >>
265 -------------------------------------------------------------
266 -- ****** help functions:
269 = if opt_D_show_passes
270 then \ what -> hPutStr stderr ("*** "++what++":\n")
271 else \ what -> return ()
273 doOutput switch io_action
277 openFile fname WriteMode >>= \ handle ->
281 -- don't use doOutput for dumping the f. export stubs
282 -- since it is more than likely that the stubs file will
283 -- turn out to be empty, in which case no file should be created.
284 outputCStub mod_name switch "" = return ()
285 outputCStub mod_name switch doc_str
288 Just fname -> writeFile fname ("#include \"rtsdefs.h\"\n"++rest)
290 rest = "#include "++show ((_UNPK_ mod_name) ++ "_stub.h") ++ '\n':doc_str
292 outputHStub switch "" = return ()
293 outputHStub switch doc_str
296 Just fname -> writeFile fname ("#include \"rtsdefs.h\"\n"++doc_str)
298 ppSourceStats short (HsModule name version exports imports fixities decls src_loc)
299 = (if short then hcat else vcat)
301 [("ExportAll ", export_all), -- 1 if no export list
302 ("ExportDecls ", export_ds),
303 ("ExportModules ", export_ms),
304 ("Imports ", import_no),
305 (" ImpQual ", import_qual),
306 (" ImpAs ", import_as),
307 (" ImpAll ", import_all),
308 (" ImpPartial ", import_partial),
309 (" ImpHiding ", import_hiding),
310 ("FixityDecls ", fixity_ds),
311 ("DefaultDecls ", default_ds),
312 ("TypeDecls ", type_ds),
313 ("DataDecls ", data_ds),
314 ("NewTypeDecls ", newt_ds),
315 ("DataConstrs ", data_constrs),
316 ("DataDerivings ", data_derivs),
317 ("ClassDecls ", class_ds),
318 ("ClassMethods ", class_method_ds),
319 ("DefaultMethods ", default_method_ds),
320 ("InstDecls ", inst_ds),
321 ("InstMethods ", inst_method_ds),
322 ("TypeSigs ", bind_tys),
323 ("ValBinds ", val_bind_ds),
324 ("FunBinds ", fn_bind_ds),
325 ("InlineMeths ", method_inlines),
326 ("InlineBinds ", bind_inlines),
327 -- ("SpecialisedData ", data_specs),
328 -- ("SpecialisedInsts ", inst_specs),
329 ("SpecialisedMeths ", method_specs),
330 ("SpecialisedBinds ", bind_specs)
333 pp_val (str, 0) = empty
335 | not short = hcat [text str, int n]
336 | otherwise = hcat [text (trim str), equals, int n, semi]
338 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
340 fixity_ds = length fixities
341 type_decls = [d | TyD d@(TySynonym _ _ _ _) <- decls]
342 data_decls = [d | TyD d@(TyData DataType _ _ _ _ _ _ _) <- decls]
343 newt_decls = [d | TyD d@(TyData NewType _ _ _ _ _ _ _) <- decls]
344 type_ds = length type_decls
345 data_ds = length data_decls
346 newt_ds = length newt_decls
347 class_decls = [d | ClD d <- decls]
348 class_ds = length class_decls
349 inst_decls = [d | InstD d <- decls]
350 inst_ds = length inst_decls
351 default_ds = length [() | DefD _ <- decls]
352 val_decls = [d | ValD d <- decls]
354 real_exports = case exports of { Nothing -> []; Just es -> es }
355 n_exports = length real_exports
356 export_ms = length [() | IEModuleContents _ <- real_exports]
357 export_ds = n_exports - export_ms
358 export_all = case exports of { Nothing -> 1; other -> 0 }
360 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
361 = count_binds (foldr ThenBinds EmptyBinds val_decls)
363 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
364 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
365 (data_constrs, data_derivs)
366 = foldr add2 (0,0) (map data_info (newt_decls ++ data_decls))
367 (class_method_ds, default_method_ds)
368 = foldr add2 (0,0) (map class_info class_decls)
369 (inst_method_ds, method_specs, method_inlines)
370 = foldr add3 (0,0,0) (map inst_info inst_decls)
373 count_binds EmptyBinds = (0,0,0,0,0)
374 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
375 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
376 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
378 count_monobinds EmptyMonoBinds = (0,0)
379 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
380 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
381 count_monobinds (PatMonoBind p r _) = (0,1)
382 count_monobinds (FunMonoBind f _ m _) = (0,1)
384 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
386 sig_info (Sig _ _ _) = (1,0,0,0)
387 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
388 sig_info (SpecSig _ _ _ _) = (0,0,1,0)
389 sig_info (InlineSig _ _) = (0,0,0,1)
390 sig_info _ = (0,0,0,0)
392 import_info (ImportDecl _ qual _ as spec _)
393 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
398 spec_info Nothing = (0,0,0,1,0,0)
399 spec_info (Just (False, _)) = (0,0,0,0,1,0)
400 spec_info (Just (True, _)) = (0,0,0,0,0,1)
402 data_info (TyData _ _ _ _ constrs derivs _ _)
403 = (length constrs, case derivs of {Nothing -> 0; Just ds -> length ds})
405 class_info (ClassDecl _ _ _ meth_sigs def_meths _ _ _ _)
406 = case count_sigs meth_sigs of
408 (classops, addpr (count_monobinds def_meths))
410 inst_info (InstDecl _ inst_meths inst_sigs _ _)
411 = case count_sigs inst_sigs of
413 (addpr (count_monobinds inst_meths), ss, is)
417 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
418 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
419 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
420 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
421 add6 (x1,x2,x3,x4,x5,x6) (y1,y2,y3,y4,y5,y6) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5,x6+y6)
425 compiler_version :: String
427 case (show opt_HiVersion) of
429 ls@[x,y] -> "0." ++ ls
432 -- 10232353 => 10232.53
439 reportCompile :: String -> String -> IO ()
440 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
441 reportCompile mod_name info
442 | not opt_ReportCompile = return ()
446 sendTo sock (mod_name++ ';': compiler_version ++ ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
447 return ()) `catch` (\ _ -> return ())
449 motherShip :: IO SockAddr
451 he <- getHostByName "laysan.dcs.gla.ac.uk"
452 case (hostAddresses he) of
453 [] -> fail (userError "No address!")
454 (x:_) -> return (SockAddrInet motherShipPort x)
457 motherShipPort :: PortNumber
458 motherShipPort = mkPortNumber 12345
460 -- creates a socket capable of sending datagrams,
461 -- binding it to a port
462 -- ( 0 => have the system pick next available port no.)
463 udpSocket :: Int -> IO Socket
465 pr <- getProtocolNumber "udp"
466 s <- socket AF_INET Datagram pr
467 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
470 reportCompile _ _ = return ()