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 )
13 import BasicTypes ( NewOrData(..) )
15 import RdrHsSyn ( RdrNameHsModule )
16 import FastString ( mkFastCharString, unpackFS )
17 import StringBuffer ( hGetStringBuffer )
18 import Parser ( parse )
19 import Lex ( PState(..), P, ParseResult(..) )
20 import SrcLoc ( mkSrcLoc )
22 import Rename ( renameModule )
24 import MkIface ( writeIface )
25 import TcModule ( TcResults(..), typecheckModule )
26 import Desugar ( deSugar )
27 import SimplCore ( core2core )
28 import OccurAnal ( occurAnalyseBinds )
29 import CoreLint ( endPass )
30 import CoreUtils ( coreBindsSize )
31 import CoreTidy ( tidyCorePgm )
32 import CoreToStg ( topCoreBindsToStg )
33 import StgSyn ( collectFinalStgBinders, pprStgBindings )
34 import SimplStg ( stg2stg )
35 import CodeGen ( codeGen )
36 import CodeOutput ( codeOutput )
38 import Module ( ModuleName, moduleNameUserString )
39 import AbsCSyn ( absCNop )
41 import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
42 import Maybes ( maybeToBool, MaybeErr(..) )
43 import TyCon ( isDataTyCon )
44 import Class ( classTyCon )
45 import UniqSupply ( mkSplitUniqSupply )
47 import FiniteMap ( emptyFM )
49 import Char ( isSpace )
50 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
53 import IOExts ( unsafePerformIO )
54 import NativeInfo ( os, arch )
60 main = stderr `seq` -- Bug fix. Sigh
66 parseModule :: IO (ModuleName, RdrNameHsModule)
68 buf <- hGetStringBuffer True{-expand tabs-} (unpackFS src_filename)
69 case parse buf PState{ bol = 0#, atbol = 1#,
70 context = [], glasgow_exts = glaexts,
71 loc = mkSrcLoc src_filename 1 } of
76 return (error "parseModule") -- just to get the types right
78 POk _ m@(HsModule mod _ _ _ _ _ _) ->
81 glaexts | opt_GlasgowExts = 1#
86 doIt :: ([CoreToDo], [StgToDo]) -> IO ()
88 doIt (core_cmds, stg_cmds)
90 (hPutStr stderr "Glasgow Haskell Compiler, version " >>
91 hPutStr stderr compiler_version >>
92 hPutStr stderr ", for Haskell 98, compiled by GHC version " >>
93 hPutStr stderr booter_version >>
94 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 -------------------------- Interface file -------------------------------
189 -- Dump instance decls and type signatures into the interface file
192 final_ids = collectFinalStgBinders (map fst stg_binds2)
194 writeIface this_mod old_iface new_iface
195 local_tycons local_classes inst_info
196 final_ids occ_anal_tidy_binds tidy_orphan_rules >>
199 -------------------------- Code generation -------------------------------
200 show_pass "CodeGen" >>
202 codeGen this_mod imported_modules
205 local_tycons local_classes
206 stg_binds2 >>= \ abstractC ->
209 -------------------------- Code output -------------------------------
210 show_pass "CodeOutput" >>
212 codeOutput this_mod local_tycons local_classes
213 occ_anal_tidy_binds stg_binds2
214 c_code h_code abstractC
218 -------------------------- Final report -------------------------------
219 reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
224 -------------------------------------------------------------
225 -- ****** help functions:
228 = if opt_D_show_passes
229 then \ what -> hPutStr stderr ("*** "++what++":\n")
230 else \ what -> return ()
232 ppSourceStats short (HsModule name version exports imports decls _ src_loc)
233 = (if short then hcat else vcat)
235 [("ExportAll ", export_all), -- 1 if no export list
236 ("ExportDecls ", export_ds),
237 ("ExportModules ", export_ms),
238 ("Imports ", import_no),
239 (" ImpQual ", import_qual),
240 (" ImpAs ", import_as),
241 (" ImpAll ", import_all),
242 (" ImpPartial ", import_partial),
243 (" ImpHiding ", import_hiding),
244 ("FixityDecls ", fixity_ds),
245 ("DefaultDecls ", default_ds),
246 ("TypeDecls ", type_ds),
247 ("DataDecls ", data_ds),
248 ("NewTypeDecls ", newt_ds),
249 ("DataConstrs ", data_constrs),
250 ("DataDerivings ", data_derivs),
251 ("ClassDecls ", class_ds),
252 ("ClassMethods ", class_method_ds),
253 ("DefaultMethods ", default_method_ds),
254 ("InstDecls ", inst_ds),
255 ("InstMethods ", inst_method_ds),
256 ("TypeSigs ", bind_tys),
257 ("ValBinds ", val_bind_ds),
258 ("FunBinds ", fn_bind_ds),
259 ("InlineMeths ", method_inlines),
260 ("InlineBinds ", bind_inlines),
261 -- ("SpecialisedData ", data_specs),
262 -- ("SpecialisedInsts ", inst_specs),
263 ("SpecialisedMeths ", method_specs),
264 ("SpecialisedBinds ", bind_specs)
267 pp_val (str, 0) = empty
269 | not short = hcat [text str, int n]
270 | otherwise = hcat [text (trim str), equals, int n, semi]
272 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
274 fixity_ds = length [() | FixD d <- decls]
275 -- NB: this omits fixity decls on local bindings and
276 -- in class decls. ToDo
278 tycl_decls = [d | TyClD d <- decls]
279 (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
281 inst_decls = [d | InstD d <- decls]
282 inst_ds = length inst_decls
283 default_ds = length [() | DefD _ <- decls]
284 val_decls = [d | ValD d <- decls]
286 real_exports = case exports of { Nothing -> []; Just es -> es }
287 n_exports = length real_exports
288 export_ms = length [() | IEModuleContents _ <- real_exports]
289 export_ds = n_exports - export_ms
290 export_all = case exports of { Nothing -> 1; other -> 0 }
292 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
293 = count_binds (foldr ThenBinds EmptyBinds val_decls)
295 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
296 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
297 (data_constrs, data_derivs)
298 = foldr add2 (0,0) (map data_info tycl_decls)
299 (class_method_ds, default_method_ds)
300 = foldr add2 (0,0) (map class_info tycl_decls)
301 (inst_method_ds, method_specs, method_inlines)
302 = foldr add3 (0,0,0) (map inst_info inst_decls)
305 count_binds EmptyBinds = (0,0,0,0,0)
306 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
307 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
308 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
310 count_monobinds EmptyMonoBinds = (0,0)
311 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
312 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
313 count_monobinds (PatMonoBind p r _) = (0,1)
314 count_monobinds (FunMonoBind f _ m _) = (0,1)
316 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
318 sig_info (Sig _ _ _) = (1,0,0,0)
319 sig_info (ClassOpSig _ _ _ _ _) = (0,1,0,0)
320 sig_info (SpecSig _ _ _) = (0,0,1,0)
321 sig_info (InlineSig _ _ _) = (0,0,0,1)
322 sig_info (NoInlineSig _ _ _) = (0,0,0,1)
323 sig_info _ = (0,0,0,0)
325 import_info (ImportDecl _ _ qual as spec _)
326 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
331 spec_info Nothing = (0,0,0,1,0,0)
332 spec_info (Just (False, _)) = (0,0,0,0,1,0)
333 spec_info (Just (True, _)) = (0,0,0,0,0,1)
335 data_info (TyData _ _ _ _ _ nconstrs derivs _ _)
336 = (nconstrs, case derivs of {Nothing -> 0; Just ds -> length ds})
337 data_info other = (0,0)
339 class_info (ClassDecl _ _ _ _ meth_sigs def_meths _ _ _ _ _ _)
340 = case count_sigs meth_sigs of
342 (classops, addpr (count_monobinds def_meths))
343 class_info other = (0,0)
345 inst_info (InstDecl _ inst_meths inst_sigs _ _)
346 = case count_sigs inst_sigs of
348 (addpr (count_monobinds inst_meths), ss, is)
350 addpr :: (Int,Int) -> Int
351 add1 :: Int -> Int -> Int
352 add2 :: (Int,Int) -> (Int,Int) -> (Int, Int)
353 add3 :: (Int,Int,Int) -> (Int,Int,Int) -> (Int, Int, Int)
354 add4 :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
355 add5 :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
356 add6 :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)
360 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
361 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
362 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
363 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
364 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)
368 compiler_version :: String
370 case (show opt_HiVersion) of
372 ls@[x,y] -> "0." ++ ls
375 -- 10232353 => 10232.53
381 \ __GLASGOW_HASKELL__" of
387 reportCompile :: ModuleName -> String -> IO ()
388 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
389 reportCompile mod_name info
390 | not opt_ReportCompile = return ()
394 sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
395 ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
396 return ()) `catch` (\ _ -> return ())
398 motherShip :: IO SockAddr
400 he <- getHostByName "laysan.dcs.gla.ac.uk"
401 case (hostAddresses he) of
402 [] -> IOERROR (userError "No address!")
403 (x:_) -> return (SockAddrInet motherShipPort x)
406 motherShipPort :: PortNumber
407 motherShipPort = mkPortNumber 12345
409 -- creates a socket capable of sending datagrams,
410 -- binding it to a port
411 -- ( 0 => have the system pick next available port no.)
412 udpSocket :: Int -> IO Socket
414 pr <- getProtocolNumber "udp"
415 s <- socket AF_INET Datagram pr
416 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
419 reportCompile _ _ = return ()