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 ( hPutStr, stderr )
14 import RdrHsSyn ( RdrNameHsModule )
15 import FastString ( unpackFS )
16 import StringBuffer ( hGetStringBuffer )
17 import Parser ( parse )
18 import Lex ( PState(..), ParseResult(..) )
19 import SrcLoc ( mkSrcLoc )
21 import Rename ( renameModule )
23 import MkIface ( writeIface )
24 import TcModule ( TcResults(..), typecheckModule )
25 import Desugar ( deSugar )
26 import SimplCore ( core2core )
27 import OccurAnal ( occurAnalyseBinds )
28 import CoreUtils ( coreBindsSize )
29 import CoreTidy ( tidyCorePgm )
30 import CoreToStg ( topCoreBindsToStg )
31 import StgSyn ( collectFinalStgBinders )
32 import SimplStg ( stg2stg )
33 import CodeGen ( codeGen )
34 import CodeOutput ( codeOutput )
36 import Module ( ModuleName, moduleNameUserString )
38 import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
39 import UniqSupply ( mkSplitUniqSupply )
42 import Char ( isSpace )
43 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
46 import IOExts ( unsafePerformIO )
47 import NativeInfo ( os, arch )
49 import StgInterp ( runStgI )
51 import Linker ( linkPrelude )
56 main = stderr `seq` -- Bug fix. Sigh
62 parseModule :: IO (ModuleName, RdrNameHsModule)
64 buf <- hGetStringBuffer True{-expand tabs-} (unpackFS src_filename)
65 case parse buf PState{ bol = 0#, atbol = 1#,
66 context = [], glasgow_exts = glaexts,
67 loc = mkSrcLoc src_filename 1 } of
72 return (error "parseModule") -- just to get the types right
74 POk _ m@(HsModule mod _ _ _ _ _ _) ->
77 glaexts | opt_GlasgowExts = 1#
82 doIt :: ([CoreToDo], [StgToDo]) -> IO ()
84 doIt (core_cmds, stg_cmds)
86 (hPutStr stderr "Glasgow Haskell Compiler, Version " >>
87 hPutStr stderr compiler_version >>
88 hPutStr stderr ", for Haskell 98, compiled by GHC version " >>
89 hPutStr stderr booter_version >>
90 hPutStr stderr "\n") >>
96 -------------------------- Reader ----------------
99 parseModule >>= \ (mod_name, rdr_module) ->
101 dumpIfSet opt_D_dump_parsed "Parser" (ppr rdr_module) >>
103 dumpIfSet opt_D_source_stats "Source Statistics"
104 (ppSourceStats False rdr_module) >>
106 -- UniqueSupplies for later use (these are the only lower case uniques)
107 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
108 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
109 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
110 mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
111 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
112 mkSplitUniqSupply 'u' >>= \ tidy_uniqs -> -- tidy up
113 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
114 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
116 -------------------------- Rename ----------------
117 show_pass "Renamer" >>
120 renameModule rn_uniqs rdr_module >>= \ maybe_rn_stuff ->
121 case maybe_rn_stuff of {
122 Nothing -> -- Hurrah! Renamer reckons that there's no need to
124 reportCompile mod_name "Compilation NOT required!" >>
127 Just (this_mod, rn_mod,
128 old_iface, new_iface,
129 rn_name_supply, fixity_env,
131 -- Oh well, we've got to recompile for real
134 -------------------------- Typechecking ----------------
135 show_pass "TypeCheck" >>
137 typecheckModule tc_uniqs rn_name_supply
138 fixity_env rn_mod >>= \ maybe_tc_stuff ->
139 case maybe_tc_stuff of {
140 Nothing -> ghcExit 1; -- Type checker failed
142 Just (tc_results@(TcResults {tc_tycons = local_tycons,
143 tc_classes = local_classes,
144 tc_insts = inst_info })) ->
147 -------------------------- Desugaring ----------------
149 deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
152 -------------------------- Main Core-language transformations ----------------
154 core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
156 -- Do the final tidy-up
157 tidyCorePgm tidy_uniqs this_mod
158 simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
160 -- Run the occurrence analyser one last time, so that
161 -- dead binders get dead-binder info. This is exploited by
162 -- code generators to avoid spitting out redundant bindings.
163 -- The occurrence-zapping in Simplify.simplCaseBinder means
164 -- that the Simplifier nukes useful dead-var stuff especially
166 let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in
168 coreBindsSize occ_anal_tidy_binds `seq`
169 -- TEMP: the above call zaps some space usage allocated by the
170 -- simplifier, which for reasons I don't understand, persists
171 -- thoroughout code generation
175 -------------------------- Convert to STG code -------------------------------
176 show_pass "Core2Stg" >>
179 stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
182 -------------------------- Simplify STG code -------------------------------
183 show_pass "Stg2Stg" >>
185 stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
188 runStgI local_tycons local_classes
189 (map fst stg_binds2) >>= \ i_result ->
190 putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
194 -------------------------- Interface file -------------------------------
195 -- Dump instance decls and type signatures into the interface file
198 final_ids = collectFinalStgBinders (map fst stg_binds2)
200 writeIface this_mod old_iface new_iface
201 local_tycons local_classes inst_info
202 final_ids occ_anal_tidy_binds tidy_orphan_rules >>
205 -------------------------- Code generation -------------------------------
206 show_pass "CodeGen" >>
208 codeGen this_mod imported_modules
211 local_tycons local_classes
212 stg_binds2 >>= \ abstractC ->
215 -------------------------- Code output -------------------------------
216 show_pass "CodeOutput" >>
218 codeOutput this_mod local_tycons local_classes
219 occ_anal_tidy_binds stg_binds2
220 c_code h_code abstractC
224 -------------------------- Final report -------------------------------
225 reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
233 -------------------------------------------------------------
234 -- ****** help functions:
237 = if opt_D_show_passes
238 then \ what -> hPutStr stderr ("*** "++what++":\n")
239 else \ what -> return ()
241 ppSourceStats short (HsModule name version exports imports decls _ src_loc)
242 = (if short then hcat else vcat)
244 [("ExportAll ", export_all), -- 1 if no export list
245 ("ExportDecls ", export_ds),
246 ("ExportModules ", export_ms),
247 ("Imports ", import_no),
248 (" ImpQual ", import_qual),
249 (" ImpAs ", import_as),
250 (" ImpAll ", import_all),
251 (" ImpPartial ", import_partial),
252 (" ImpHiding ", import_hiding),
253 ("FixityDecls ", fixity_ds),
254 ("DefaultDecls ", default_ds),
255 ("TypeDecls ", type_ds),
256 ("DataDecls ", data_ds),
257 ("NewTypeDecls ", newt_ds),
258 ("DataConstrs ", data_constrs),
259 ("DataDerivings ", data_derivs),
260 ("ClassDecls ", class_ds),
261 ("ClassMethods ", class_method_ds),
262 ("DefaultMethods ", default_method_ds),
263 ("InstDecls ", inst_ds),
264 ("InstMethods ", inst_method_ds),
265 ("TypeSigs ", bind_tys),
266 ("ValBinds ", val_bind_ds),
267 ("FunBinds ", fn_bind_ds),
268 ("InlineMeths ", method_inlines),
269 ("InlineBinds ", bind_inlines),
270 -- ("SpecialisedData ", data_specs),
271 -- ("SpecialisedInsts ", inst_specs),
272 ("SpecialisedMeths ", method_specs),
273 ("SpecialisedBinds ", bind_specs)
276 pp_val (str, 0) = empty
278 | not short = hcat [text str, int n]
279 | otherwise = hcat [text (trim str), equals, int n, semi]
281 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
283 fixity_ds = length [() | FixD d <- decls]
284 -- NB: this omits fixity decls on local bindings and
285 -- in class decls. ToDo
287 tycl_decls = [d | TyClD d <- decls]
288 (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
290 inst_decls = [d | InstD d <- decls]
291 inst_ds = length inst_decls
292 default_ds = length [() | DefD _ <- decls]
293 val_decls = [d | ValD d <- decls]
295 real_exports = case exports of { Nothing -> []; Just es -> es }
296 n_exports = length real_exports
297 export_ms = length [() | IEModuleContents _ <- real_exports]
298 export_ds = n_exports - export_ms
299 export_all = case exports of { Nothing -> 1; other -> 0 }
301 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
302 = count_binds (foldr ThenBinds EmptyBinds val_decls)
304 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
305 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
306 (data_constrs, data_derivs)
307 = foldr add2 (0,0) (map data_info tycl_decls)
308 (class_method_ds, default_method_ds)
309 = foldr add2 (0,0) (map class_info tycl_decls)
310 (inst_method_ds, method_specs, method_inlines)
311 = foldr add3 (0,0,0) (map inst_info inst_decls)
314 count_binds EmptyBinds = (0,0,0,0,0)
315 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
316 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
317 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
319 count_monobinds EmptyMonoBinds = (0,0)
320 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
321 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
322 count_monobinds (PatMonoBind p r _) = (0,1)
323 count_monobinds (FunMonoBind f _ m _) = (0,1)
325 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
327 sig_info (Sig _ _ _) = (1,0,0,0)
328 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
329 sig_info (SpecSig _ _ _) = (0,0,1,0)
330 sig_info (InlineSig _ _ _) = (0,0,0,1)
331 sig_info (NoInlineSig _ _ _) = (0,0,0,1)
332 sig_info _ = (0,0,0,0)
334 import_info (ImportDecl _ _ qual as spec _)
335 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
340 spec_info Nothing = (0,0,0,1,0,0)
341 spec_info (Just (False, _)) = (0,0,0,0,1,0)
342 spec_info (Just (True, _)) = (0,0,0,0,0,1)
344 data_info (TyData _ _ _ _ _ nconstrs derivs _ _ _ _)
345 = (nconstrs, case derivs of {Nothing -> 0; Just ds -> length ds})
346 data_info other = (0,0)
348 class_info (ClassDecl _ _ _ _ meth_sigs def_meths _ _ _ )
349 = case count_sigs meth_sigs of
351 (classops, addpr (count_monobinds def_meths))
352 class_info other = (0,0)
354 inst_info (InstDecl _ inst_meths inst_sigs _ _)
355 = case count_sigs inst_sigs of
357 (addpr (count_monobinds inst_meths), ss, is)
359 addpr :: (Int,Int) -> Int
360 add1 :: Int -> Int -> Int
361 add2 :: (Int,Int) -> (Int,Int) -> (Int, Int)
362 add3 :: (Int,Int,Int) -> (Int,Int,Int) -> (Int, Int, Int)
363 add4 :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
364 add5 :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
365 add6 :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)
369 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
370 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
371 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
372 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
373 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)
377 compiler_version :: String
379 case (show opt_HiVersion) of
381 ls@[x,y] -> "0." ++ ls
384 -- 10232353 => 10232.53
390 \ __GLASGOW_HASKELL__" of
396 reportCompile :: ModuleName -> String -> IO ()
397 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
398 reportCompile mod_name info
399 | not opt_ReportCompile = return ()
403 sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
404 ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
405 return ()) `catch` (\ _ -> return ())
407 motherShip :: IO SockAddr
409 he <- getHostByName "laysan.dcs.gla.ac.uk"
410 case (hostAddresses he) of
411 [] -> IOERROR (userError "No address!")
412 (x:_) -> return (SockAddrInet motherShipPort x)
415 motherShipPort :: PortNumber
416 motherShipPort = mkPortNumber 12345
418 -- creates a socket capable of sending datagrams,
419 -- binding it to a port
420 -- ( 0 => have the system pick next available port no.)
421 udpSocket :: Int -> IO Socket
423 pr <- getProtocolNumber "udp"
424 s <- socket AF_INET Datagram pr
425 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
428 reportCompile _ _ = return ()