2 % (c) The GRASP/AQUA Project, Glasgow University, 1993-1998
4 \section[GHC_Main]{Main driver for Glasgow Haskell compiler}
7 module HscMain ( hscMain ) 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 )
55 -> ModSummary -- summary, including source filename
56 -> Maybe ModIFace -- old interface, if available
57 -> String -- file in which to put the output (.s, .hc, .java etc.)
58 -> HomeSymbolTable -- for home module ModDetails
59 -> PersistentCompilerState -- IN: persistent compiler state
62 hscMain flags core_cmds stg_cmds summary maybe_old_iface
63 output_filename mod_details pcs1 =
65 -------------------------- Reader ----------------
69 let src_filename -- name of the preprocessed source file
70 = case ms_ppsource summary of
71 Just (filename, fingerprint) -> filename
72 Nothing -> pprPanic "hscMain:summary is not of a source module"
75 buf <- hGetStringBuffer True{-expand tabs-} src_filename
77 let glaexts | opt_GlasgowExts = 1#
80 case parse buf PState{ bol = 0#, atbol = 1#,
81 context = [], glasgow_exts = glaexts,
82 loc = mkSrcLoc src_filename 1 } of {
84 PFailed err -> return (CompErrs pcs err)
86 POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
88 dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
90 dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
91 (ppSourceStats False rdr_module) >>
93 -- UniqueSupplies for later use (these are the only lower case uniques)
94 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
95 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
96 mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
97 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
98 mkSplitUniqSupply 'u' >>= \ tidy_uniqs -> -- tidy up
99 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
100 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
102 -------------------------- Rename ----------------
103 show_pass "Renamer" >>
106 renameModule rn_uniqs rdr_module >>= \ maybe_rn_stuff ->
107 case maybe_rn_stuff of {
108 Nothing -> -- Hurrah! Renamer reckons that there's no need to
110 reportCompile mod_name "Compilation NOT required!" >>
113 Just (this_mod, rn_mod,
114 old_iface, new_iface,
115 rn_name_supply, fixity_env,
117 -- Oh well, we've got to recompile for real
120 -------------------------- Typechecking ----------------
121 show_pass "TypeCheck" >>
123 typecheckModule tc_uniqs rn_name_supply
124 fixity_env rn_mod >>= \ maybe_tc_stuff ->
125 case maybe_tc_stuff of {
126 Nothing -> ghcExit 1; -- Type checker failed
128 Just (tc_results@(TcResults {tc_tycons = local_tycons,
129 tc_classes = local_classes,
130 tc_insts = inst_info })) ->
133 -------------------------- Desugaring ----------------
135 deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
138 -------------------------- Main Core-language transformations ----------------
140 core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
142 -- Do the final tidy-up
143 tidyCorePgm tidy_uniqs this_mod
144 simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
146 -- Run the occurrence analyser one last time, so that
147 -- dead binders get dead-binder info. This is exploited by
148 -- code generators to avoid spitting out redundant bindings.
149 -- The occurrence-zapping in Simplify.simplCaseBinder means
150 -- that the Simplifier nukes useful dead-var stuff especially
152 let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in
154 coreBindsSize occ_anal_tidy_binds `seq`
155 -- TEMP: the above call zaps some space usage allocated by the
156 -- simplifier, which for reasons I don't understand, persists
157 -- thoroughout code generation
161 -------------------------- Convert to STG code -------------------------------
162 show_pass "Core2Stg" >>
165 stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
168 -------------------------- Simplify STG code -------------------------------
169 show_pass "Stg2Stg" >>
171 stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
174 runStgI local_tycons local_classes
175 (map fst stg_binds2) >>= \ i_result ->
176 putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
180 -------------------------- Interface file -------------------------------
181 -- Dump instance decls and type signatures into the interface file
184 final_ids = collectFinalStgBinders (map fst stg_binds2)
186 writeIface this_mod old_iface new_iface
187 local_tycons local_classes inst_info
188 final_ids occ_anal_tidy_binds tidy_orphan_rules >>
191 -------------------------- Code generation -------------------------------
192 show_pass "CodeGen" >>
194 codeGen this_mod imported_modules
197 local_tycons local_classes
198 stg_binds2 >>= \ abstractC ->
201 -------------------------- Code output -------------------------------
202 show_pass "CodeOutput" >>
204 codeOutput this_mod local_tycons local_classes
205 occ_anal_tidy_binds stg_binds2
206 c_code h_code abstractC
210 -------------------------- Final report -------------------------------
211 reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
219 -------------------------------------------------------------
220 -- ****** help functions:
223 = if opt_D_show_passes
224 then \ what -> hPutStr stderr ("*** "++what++":\n")
225 else \ what -> return ()
227 ppSourceStats short (HsModule name version exports imports decls _ src_loc)
228 = (if short then hcat else vcat)
230 [("ExportAll ", export_all), -- 1 if no export list
231 ("ExportDecls ", export_ds),
232 ("ExportModules ", export_ms),
233 ("Imports ", import_no),
234 (" ImpQual ", import_qual),
235 (" ImpAs ", import_as),
236 (" ImpAll ", import_all),
237 (" ImpPartial ", import_partial),
238 (" ImpHiding ", import_hiding),
239 ("FixityDecls ", fixity_ds),
240 ("DefaultDecls ", default_ds),
241 ("TypeDecls ", type_ds),
242 ("DataDecls ", data_ds),
243 ("NewTypeDecls ", newt_ds),
244 ("DataConstrs ", data_constrs),
245 ("DataDerivings ", data_derivs),
246 ("ClassDecls ", class_ds),
247 ("ClassMethods ", class_method_ds),
248 ("DefaultMethods ", default_method_ds),
249 ("InstDecls ", inst_ds),
250 ("InstMethods ", inst_method_ds),
251 ("TypeSigs ", bind_tys),
252 ("ValBinds ", val_bind_ds),
253 ("FunBinds ", fn_bind_ds),
254 ("InlineMeths ", method_inlines),
255 ("InlineBinds ", bind_inlines),
256 -- ("SpecialisedData ", data_specs),
257 -- ("SpecialisedInsts ", inst_specs),
258 ("SpecialisedMeths ", method_specs),
259 ("SpecialisedBinds ", bind_specs)
262 pp_val (str, 0) = empty
264 | not short = hcat [text str, int n]
265 | otherwise = hcat [text (trim str), equals, int n, semi]
267 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
269 fixity_ds = length [() | FixD d <- decls]
270 -- NB: this omits fixity decls on local bindings and
271 -- in class decls. ToDo
273 tycl_decls = [d | TyClD d <- decls]
274 (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
276 inst_decls = [d | InstD d <- decls]
277 inst_ds = length inst_decls
278 default_ds = length [() | DefD _ <- decls]
279 val_decls = [d | ValD d <- decls]
281 real_exports = case exports of { Nothing -> []; Just es -> es }
282 n_exports = length real_exports
283 export_ms = length [() | IEModuleContents _ <- real_exports]
284 export_ds = n_exports - export_ms
285 export_all = case exports of { Nothing -> 1; other -> 0 }
287 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
288 = count_binds (foldr ThenBinds EmptyBinds val_decls)
290 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
291 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
292 (data_constrs, data_derivs)
293 = foldr add2 (0,0) (map data_info tycl_decls)
294 (class_method_ds, default_method_ds)
295 = foldr add2 (0,0) (map class_info tycl_decls)
296 (inst_method_ds, method_specs, method_inlines)
297 = foldr add3 (0,0,0) (map inst_info inst_decls)
300 count_binds EmptyBinds = (0,0,0,0,0)
301 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
302 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
303 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
305 count_monobinds EmptyMonoBinds = (0,0)
306 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
307 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
308 count_monobinds (PatMonoBind p r _) = (0,1)
309 count_monobinds (FunMonoBind f _ m _) = (0,1)
311 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
313 sig_info (Sig _ _ _) = (1,0,0,0)
314 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
315 sig_info (SpecSig _ _ _) = (0,0,1,0)
316 sig_info (InlineSig _ _ _) = (0,0,0,1)
317 sig_info (NoInlineSig _ _ _) = (0,0,0,1)
318 sig_info _ = (0,0,0,0)
320 import_info (ImportDecl _ _ qual as spec _)
321 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
326 spec_info Nothing = (0,0,0,1,0,0)
327 spec_info (Just (False, _)) = (0,0,0,0,1,0)
328 spec_info (Just (True, _)) = (0,0,0,0,0,1)
330 data_info (TyData _ _ _ _ _ nconstrs derivs _ _ _ _)
331 = (nconstrs, case derivs of {Nothing -> 0; Just ds -> length ds})
332 data_info other = (0,0)
334 class_info (ClassDecl _ _ _ _ meth_sigs def_meths _ _ _ )
335 = case count_sigs meth_sigs of
337 (classops, addpr (count_monobinds def_meths))
338 class_info other = (0,0)
340 inst_info (InstDecl _ inst_meths inst_sigs _ _)
341 = case count_sigs inst_sigs of
343 (addpr (count_monobinds inst_meths), ss, is)
345 addpr :: (Int,Int) -> Int
346 add1 :: Int -> Int -> Int
347 add2 :: (Int,Int) -> (Int,Int) -> (Int, Int)
348 add3 :: (Int,Int,Int) -> (Int,Int,Int) -> (Int, Int, Int)
349 add4 :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
350 add5 :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
351 add6 :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)
355 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
356 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
357 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
358 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
359 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)
366 reportCompile :: ModuleName -> String -> IO ()
367 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
368 reportCompile mod_name info
369 | not opt_ReportCompile = return ()
373 sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
374 ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
375 return ()) `catch` (\ _ -> return ())
377 motherShip :: IO SockAddr
379 he <- getHostByName "laysan.dcs.gla.ac.uk"
380 case (hostAddresses he) of
381 [] -> IOERROR (userError "No address!")
382 (x:_) -> return (SockAddrInet motherShipPort x)
385 motherShipPort :: PortNumber
386 motherShipPort = mkPortNumber 12345
388 -- creates a socket capable of sending datagrams,
389 -- binding it to a port
390 -- ( 0 => have the system pick next available port no.)
391 udpSocket :: Int -> IO Socket
393 pr <- getProtocolNumber "udp"
394 s <- socket AF_INET Datagram pr
395 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
398 reportCompile _ _ = return ()