2 % (c) The GRASP/AQUA Project, Glasgow University, 1993-1998
4 \section[GHC_Main]{Main driver for Glasgow Haskell compiler}
7 module Main ( main ) where
9 #include "HsVersions.h"
11 import IO ( IOMode(..), hPutStr, hClose, openFile, stderr )
13 import BasicTypes ( NewOrData(..) )
15 import ReadPrefix ( rdModule )
16 import Rename ( renameModule )
18 import MkIface -- several functions
19 import TcModule ( typecheckModule )
20 import Desugar ( deSugar )
21 import SimplCore ( core2core )
22 import CoreToStg ( topCoreBindsToStg )
23 import StgSyn ( collectFinalStgBinders, pprStgBindingsWithSRTs )
24 import SimplStg ( stg2stg )
25 import CodeGen ( codeGen )
26 #if ! OMIT_NATIVE_CODEGEN
27 import AsmCodeGen ( dumpRealAsm, writeRealAsm )
30 import OccName ( Module, moduleString )
31 import AbsCSyn ( absCNop )
32 import AbsCUtils ( flattenAbsC )
34 import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
35 import Maybes ( maybeToBool, MaybeErr(..) )
36 import TyCon ( isDataTyCon )
37 import Class ( classTyCon )
38 import UniqSupply ( mkSplitUniqSupply )
40 import PprAbsC ( dumpRealC, writeRealC )
41 import FiniteMap ( emptyFM )
43 import Char ( isSpace )
44 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
47 import IOExts ( unsafePerformIO )
48 import NativeInfo ( os, arch )
60 doIt :: ([CoreToDo], [StgToDo]) -> IO ()
62 doIt (core_cmds, stg_cmds)
64 (hPutStr stderr "Glasgow Haskell Compiler, version " >>
65 hPutStr stderr compiler_version >>
66 hPutStr stderr ", for Haskell 1.4\n") >>
71 rdModule >>= \ (mod_name, rdr_module) ->
73 dumpIfSet opt_D_dump_rdr "Reader" (ppr rdr_module) >>
75 dumpIfSet opt_D_source_stats "Source Statistics"
76 (ppSourceStats False rdr_module) >>
78 -- UniqueSupplies for later use (these are the only lower case uniques)
80 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
82 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
84 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
86 mkSplitUniqSupply 's' >>= \ sm_uniqs -> -- core-to-core simplifier
88 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
90 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
92 mkSplitUniqSupply 'f' >>= \ fl_uniqs -> -- absC flattener
94 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
97 show_pass "Renamer" >>
100 renameModule rn_uniqs rdr_module >>=
102 case maybe_rn_stuff of {
103 Nothing -> -- Hurrah! Renamer reckons that there's no need to
105 reportCompile mod_name "Compilation NOT required!" >>
108 Just (rn_mod, iface_file_stuff, rn_name_supply, imported_modules) ->
109 -- Oh well, we've got to recompile for real
112 -- Safely past renaming: we can start the interface file:
113 -- (the iface file is produced incrementally, as we have
114 -- the information that we need...; we use "iface<blah>")
115 -- "endIface" finishes the job.
116 startIface mod_name >>= \ if_handle ->
117 ifaceMain if_handle iface_file_stuff >>
120 -- ******* TYPECHECKER
121 show_pass "TypeCheck" >>
123 typecheckModule tc_uniqs rn_name_supply rn_mod >>= \ maybe_tc_stuff ->
124 case maybe_tc_stuff of {
125 Nothing -> ghcExit 1; -- Type checker failed
128 local_tycons, local_classes, inst_info,
134 show_pass "DeSugar" >>
136 deSugar ds_uniqs global_env mod_name all_binds fo_decls >>= \ (desugared, h_code, c_code) ->
139 -- ******* CORE-TO-CORE SIMPLIFICATION
140 show_pass "Core2Core" >>
143 local_data_tycons = filter isDataTyCon local_tycons
145 core2core core_cmds mod_name local_classes
151 -- ******* STG-TO-STG SIMPLIFICATION
152 show_pass "Core2Stg" >>
155 stg_binds = topCoreBindsToStg c2s_uniqs simplified
158 show_pass "Stg2Stg" >>
160 stg2stg stg_cmds mod_name st_uniqs stg_binds
162 \ (stg_binds2, cost_centre_info) ->
164 dumpIfSet opt_D_dump_stg "STG syntax:"
165 (pprStgBindingsWithSRTs stg_binds2) >>
167 -- Dump instance decls and type signatures into the interface file
169 final_ids = collectFinalStgBinders (map fst stg_binds2)
172 ifaceDecls if_handle local_tycons local_classes inst_info final_ids simplified >>
173 endIface if_handle >>
174 -- We are definitely done w/ interface-file stuff at this point:
175 -- (See comments near call to "startIface".)
177 -- ******* "ABSTRACT", THEN "FLAT", THEN *REAL* C!
178 show_pass "CodeGen" >>
181 all_local_data_tycons = filter isDataTyCon (map classTyCon local_classes)
183 -- Generate info tables for the data constrs arising
184 -- from class decls as well
186 all_tycon_specs = emptyFM -- Not specialising tycons any more
188 abstractC = codeGen mod_name -- module name for CC labelling
190 imported_modules -- import names for CC registering
191 all_local_data_tycons -- type constructors generated locally
192 all_tycon_specs -- tycon specialisations
195 flat_abstractC = flattenAbsC fl_uniqs abstractC
197 dumpIfSet opt_D_dump_absC "Abstract C" (dumpRealC abstractC) >>
199 show_pass "CodeOutput" >>
201 -- You can have C (c_output) or assembly-language (ncg_output),
202 -- but not both. [Allowing for both gives a space leak on
203 -- flat_abstractC. WDP 94/10]
205 (flat_absC_c, flat_absC_ncg) =
206 case (maybeToBool opt_ProduceC || opt_D_dump_realC,
207 maybeToBool opt_ProduceS || opt_D_dump_asm) of
208 (True, False) -> (flat_abstractC, absCNop)
209 (False, True) -> (absCNop, flat_abstractC)
210 (False, False) -> (absCNop, absCNop)
211 (True, True) -> error "ERROR: Can't do both .hc and .s at the same time"
213 -- C stubs for "foreign export"ed functions.
214 stub_c_output_d = pprCode CStyle c_code
215 stub_c_output_w = showSDoc stub_c_output_d
217 -- Header file protos for "foreign export"ed functions.
218 stub_h_output_d = pprCode CStyle h_code
219 stub_h_output_w = showSDoc stub_h_output_d
221 c_output_d = dumpRealC flat_absC_c
222 c_output_w = (\ f -> writeRealC f flat_absC_c)
224 #if OMIT_NATIVE_CODEGEN
225 ncg_output_d = error "*** GHC not built with a native-code generator ***"
226 ncg_output_w = ncg_output_d
228 ncg_output_d = dumpRealAsm flat_absC_ncg ncg_uniqs
229 ncg_output_w = (\ f -> writeRealAsm f flat_absC_ncg ncg_uniqs)
233 dumpIfSet opt_D_dump_asm "Asm code" ncg_output_d >>
234 doOutput opt_ProduceS ncg_output_w >>
236 dumpIfSet opt_D_dump_foreign "Foreign export header file" stub_h_output_d >>
237 outputHStub opt_ProduceExportHStubs stub_h_output_w >>
239 dumpIfSet opt_D_dump_foreign "Foreign export stubs" stub_c_output_d >>
240 outputCStub mod_name opt_ProduceExportCStubs stub_c_output_w >>
242 dumpIfSet opt_D_dump_realC "Real C" c_output_d >>
243 doOutput opt_ProduceC c_output_w >>
245 reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
250 -------------------------------------------------------------
251 -- ****** help functions:
254 = if opt_D_show_passes
255 then \ what -> hPutStr stderr ("*** "++what++":\n")
256 else \ what -> return ()
258 doOutput switch io_action
262 openFile fname WriteMode >>= \ handle ->
266 -- don't use doOutput for dumping the f. export stubs
267 -- since it is more than likely that the stubs file will
268 -- turn out to be empty, in which case no file should be created.
269 outputCStub mod_name switch "" = return ()
270 outputCStub mod_name switch doc_str
273 Just fname -> writeFile fname ("#include \"Rts.h\"\n#include \"RtsAPI.h\"\n"++rest)
275 rest = "#include "++show (moduleString mod_name ++ "_stub.h") ++ '\n':doc_str
277 outputHStub switch "" = return ()
278 outputHStub switch doc_str
281 Just fname -> writeFile fname ("#include \"Rts.h\"\n"++doc_str)
283 ppSourceStats short (HsModule name version exports imports decls src_loc)
284 = (if short then hcat else vcat)
286 [("ExportAll ", export_all), -- 1 if no export list
287 ("ExportDecls ", export_ds),
288 ("ExportModules ", export_ms),
289 ("Imports ", import_no),
290 (" ImpQual ", import_qual),
291 (" ImpAs ", import_as),
292 (" ImpAll ", import_all),
293 (" ImpPartial ", import_partial),
294 (" ImpHiding ", import_hiding),
295 ("FixityDecls ", fixity_ds),
296 ("DefaultDecls ", default_ds),
297 ("TypeDecls ", type_ds),
298 ("DataDecls ", data_ds),
299 ("NewTypeDecls ", newt_ds),
300 ("DataConstrs ", data_constrs),
301 ("DataDerivings ", data_derivs),
302 ("ClassDecls ", class_ds),
303 ("ClassMethods ", class_method_ds),
304 ("DefaultMethods ", default_method_ds),
305 ("InstDecls ", inst_ds),
306 ("InstMethods ", inst_method_ds),
307 ("TypeSigs ", bind_tys),
308 ("ValBinds ", val_bind_ds),
309 ("FunBinds ", fn_bind_ds),
310 ("InlineMeths ", method_inlines),
311 ("InlineBinds ", bind_inlines),
312 -- ("SpecialisedData ", data_specs),
313 -- ("SpecialisedInsts ", inst_specs),
314 ("SpecialisedMeths ", method_specs),
315 ("SpecialisedBinds ", bind_specs)
318 pp_val (str, 0) = empty
320 | not short = hcat [text str, int n]
321 | otherwise = hcat [text (trim str), equals, int n, semi]
323 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
325 fixity_ds = length [() | FixD d <- decls]
326 -- NB: this omits fixity decls on local bindings and
327 -- in class decls. ToDo
329 tycl_decls = [d | TyClD d <- decls]
330 (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
332 inst_decls = [d | InstD d <- decls]
333 inst_ds = length inst_decls
334 default_ds = length [() | DefD _ <- decls]
335 val_decls = [d | ValD d <- decls]
337 real_exports = case exports of { Nothing -> []; Just es -> es }
338 n_exports = length real_exports
339 export_ms = length [() | IEModuleContents _ <- real_exports]
340 export_ds = n_exports - export_ms
341 export_all = case exports of { Nothing -> 1; other -> 0 }
343 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
344 = count_binds (foldr ThenBinds EmptyBinds val_decls)
346 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
347 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
348 (data_constrs, data_derivs)
349 = foldr add2 (0,0) (map data_info tycl_decls)
350 (class_method_ds, default_method_ds)
351 = foldr add2 (0,0) (map class_info tycl_decls)
352 (inst_method_ds, method_specs, method_inlines)
353 = foldr add3 (0,0,0) (map inst_info inst_decls)
356 count_binds EmptyBinds = (0,0,0,0,0)
357 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
358 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
359 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
361 count_monobinds EmptyMonoBinds = (0,0)
362 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
363 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
364 count_monobinds (PatMonoBind p r _) = (0,1)
365 count_monobinds (FunMonoBind f _ m _) = (0,1)
367 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
369 sig_info (Sig _ _ _) = (1,0,0,0)
370 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
371 sig_info (SpecSig _ _ _ _) = (0,0,1,0)
372 sig_info (InlineSig _ _) = (0,0,0,1)
373 sig_info _ = (0,0,0,0)
375 import_info (ImportDecl _ qual _ as spec _)
376 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
381 spec_info Nothing = (0,0,0,1,0,0)
382 spec_info (Just (False, _)) = (0,0,0,0,1,0)
383 spec_info (Just (True, _)) = (0,0,0,0,0,1)
385 data_info (TyData _ _ _ _ constrs derivs _ _)
386 = (length constrs, case derivs of {Nothing -> 0; Just ds -> length ds})
387 data_info other = (0,0)
389 class_info (ClassDecl _ _ _ meth_sigs def_meths _ _ _ _)
390 = case count_sigs meth_sigs of
392 (classops, addpr (count_monobinds def_meths))
393 class_info other = (0,0)
395 inst_info (InstDecl _ inst_meths inst_sigs _ _)
396 = case count_sigs inst_sigs of
398 (addpr (count_monobinds inst_meths), ss, is)
402 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
403 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
404 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
405 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
406 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)
410 compiler_version :: String
412 case (show opt_HiVersion) of
414 ls@[x,y] -> "0." ++ ls
417 -- 10232353 => 10232.53
424 reportCompile :: Module -> String -> IO ()
425 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
426 reportCompile mod_name info
427 | not opt_ReportCompile = return ()
431 sendTo sock (moduleString mod_name ++ ';': compiler_version ++ ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
432 return ()) `catch` (\ _ -> return ())
434 motherShip :: IO SockAddr
436 he <- getHostByName "laysan.dcs.gla.ac.uk"
437 case (hostAddresses he) of
438 [] -> IOERROR (userError "No address!")
439 (x:_) -> return (SockAddrInet motherShipPort x)
442 motherShipPort :: PortNumber
443 motherShipPort = mkPortNumber 12345
445 -- creates a socket capable of sending datagrams,
446 -- binding it to a port
447 -- ( 0 => have the system pick next available port no.)
448 udpSocket :: Int -> IO Socket
450 pr <- getProtocolNumber "udp"
451 s <- socket AF_INET Datagram pr
452 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
455 reportCompile _ _ = return ()