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 or .c)
58 -> HomeSymbolTable -- for home module ModDetails
59 -> PersistentCompilerState -- IN: persistent compiler state
60 -> IO CompResult -- NB. without the Linkable filled in; the
61 -- driver sorts that out.
63 hscMain flags core_cmds stg_cmds summary maybe_old_iface
64 output_filename mod_details pcs =
66 -------------------------- Reader ----------------
70 buf <- hGetStringBuffer True{-expand tabs-} src_filename
72 let glaexts | opt_GlasgowExts = 1#
75 case parse buf PState{ bol = 0#, atbol = 1#,
76 context = [], glasgow_exts = glaexts,
77 loc = mkSrcLoc src_filename 1 } of {
79 PFailed err -> return (CompErrs pcs err);
81 POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
83 dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
85 dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
86 (ppSourceStats False rdr_module) >>
88 -- UniqueSupplies for later use (these are the only lower case uniques)
89 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
90 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
91 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
92 mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
93 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
94 mkSplitUniqSupply 'u' >>= \ tidy_uniqs -> -- tidy up
95 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
96 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
98 -------------------------- Rename ----------------
99 show_pass "Renamer" >>
102 renameModule rn_uniqs rdr_module >>= \ maybe_rn_stuff ->
103 case maybe_rn_stuff of {
104 Nothing -> -- Hurrah! Renamer reckons that there's no need to
106 reportCompile mod_name "Compilation NOT required!" >>
109 Just (this_mod, rn_mod,
110 old_iface, new_iface,
111 rn_name_supply, fixity_env,
113 -- Oh well, we've got to recompile for real
116 -------------------------- Typechecking ----------------
117 show_pass "TypeCheck" >>
119 typecheckModule tc_uniqs rn_name_supply
120 fixity_env rn_mod >>= \ maybe_tc_stuff ->
121 case maybe_tc_stuff of {
122 Nothing -> ghcExit 1; -- Type checker failed
124 Just (tc_results@(TcResults {tc_tycons = local_tycons,
125 tc_classes = local_classes,
126 tc_insts = inst_info })) ->
129 -------------------------- Desugaring ----------------
131 deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
134 -------------------------- Main Core-language transformations ----------------
136 core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
138 -- Do the final tidy-up
139 tidyCorePgm tidy_uniqs this_mod
140 simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
142 -- Run the occurrence analyser one last time, so that
143 -- dead binders get dead-binder info. This is exploited by
144 -- code generators to avoid spitting out redundant bindings.
145 -- The occurrence-zapping in Simplify.simplCaseBinder means
146 -- that the Simplifier nukes useful dead-var stuff especially
148 let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in
150 coreBindsSize occ_anal_tidy_binds `seq`
151 -- TEMP: the above call zaps some space usage allocated by the
152 -- simplifier, which for reasons I don't understand, persists
153 -- thoroughout code generation
157 -------------------------- Convert to STG code -------------------------------
158 show_pass "Core2Stg" >>
161 stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
164 -------------------------- Simplify STG code -------------------------------
165 show_pass "Stg2Stg" >>
167 stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
170 runStgI local_tycons local_classes
171 (map fst stg_binds2) >>= \ i_result ->
172 putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
176 -------------------------- Interface file -------------------------------
177 -- Dump instance decls and type signatures into the interface file
180 final_ids = collectFinalStgBinders (map fst stg_binds2)
182 writeIface this_mod old_iface new_iface
183 local_tycons local_classes inst_info
184 final_ids occ_anal_tidy_binds tidy_orphan_rules >>
187 -------------------------- Code generation -------------------------------
188 show_pass "CodeGen" >>
190 codeGen this_mod imported_modules
193 local_tycons local_classes
194 stg_binds2 >>= \ abstractC ->
197 -------------------------- Code output -------------------------------
198 show_pass "CodeOutput" >>
200 codeOutput this_mod local_tycons local_classes
201 occ_anal_tidy_binds stg_binds2
202 c_code h_code abstractC
206 -------------------------- Final report -------------------------------
207 reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
215 -------------------------------------------------------------
216 -- ****** help functions:
219 = if opt_D_show_passes
220 then \ what -> hPutStr stderr ("*** "++what++":\n")
221 else \ what -> return ()
223 ppSourceStats short (HsModule name version exports imports decls _ src_loc)
224 = (if short then hcat else vcat)
226 [("ExportAll ", export_all), -- 1 if no export list
227 ("ExportDecls ", export_ds),
228 ("ExportModules ", export_ms),
229 ("Imports ", import_no),
230 (" ImpQual ", import_qual),
231 (" ImpAs ", import_as),
232 (" ImpAll ", import_all),
233 (" ImpPartial ", import_partial),
234 (" ImpHiding ", import_hiding),
235 ("FixityDecls ", fixity_ds),
236 ("DefaultDecls ", default_ds),
237 ("TypeDecls ", type_ds),
238 ("DataDecls ", data_ds),
239 ("NewTypeDecls ", newt_ds),
240 ("DataConstrs ", data_constrs),
241 ("DataDerivings ", data_derivs),
242 ("ClassDecls ", class_ds),
243 ("ClassMethods ", class_method_ds),
244 ("DefaultMethods ", default_method_ds),
245 ("InstDecls ", inst_ds),
246 ("InstMethods ", inst_method_ds),
247 ("TypeSigs ", bind_tys),
248 ("ValBinds ", val_bind_ds),
249 ("FunBinds ", fn_bind_ds),
250 ("InlineMeths ", method_inlines),
251 ("InlineBinds ", bind_inlines),
252 -- ("SpecialisedData ", data_specs),
253 -- ("SpecialisedInsts ", inst_specs),
254 ("SpecialisedMeths ", method_specs),
255 ("SpecialisedBinds ", bind_specs)
258 pp_val (str, 0) = empty
260 | not short = hcat [text str, int n]
261 | otherwise = hcat [text (trim str), equals, int n, semi]
263 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
265 fixity_ds = length [() | FixD d <- decls]
266 -- NB: this omits fixity decls on local bindings and
267 -- in class decls. ToDo
269 tycl_decls = [d | TyClD d <- decls]
270 (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
272 inst_decls = [d | InstD d <- decls]
273 inst_ds = length inst_decls
274 default_ds = length [() | DefD _ <- decls]
275 val_decls = [d | ValD d <- decls]
277 real_exports = case exports of { Nothing -> []; Just es -> es }
278 n_exports = length real_exports
279 export_ms = length [() | IEModuleContents _ <- real_exports]
280 export_ds = n_exports - export_ms
281 export_all = case exports of { Nothing -> 1; other -> 0 }
283 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
284 = count_binds (foldr ThenBinds EmptyBinds val_decls)
286 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
287 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
288 (data_constrs, data_derivs)
289 = foldr add2 (0,0) (map data_info tycl_decls)
290 (class_method_ds, default_method_ds)
291 = foldr add2 (0,0) (map class_info tycl_decls)
292 (inst_method_ds, method_specs, method_inlines)
293 = foldr add3 (0,0,0) (map inst_info inst_decls)
296 count_binds EmptyBinds = (0,0,0,0,0)
297 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
298 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
299 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
301 count_monobinds EmptyMonoBinds = (0,0)
302 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
303 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
304 count_monobinds (PatMonoBind p r _) = (0,1)
305 count_monobinds (FunMonoBind f _ m _) = (0,1)
307 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
309 sig_info (Sig _ _ _) = (1,0,0,0)
310 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
311 sig_info (SpecSig _ _ _) = (0,0,1,0)
312 sig_info (InlineSig _ _ _) = (0,0,0,1)
313 sig_info (NoInlineSig _ _ _) = (0,0,0,1)
314 sig_info _ = (0,0,0,0)
316 import_info (ImportDecl _ _ qual as spec _)
317 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
322 spec_info Nothing = (0,0,0,1,0,0)
323 spec_info (Just (False, _)) = (0,0,0,0,1,0)
324 spec_info (Just (True, _)) = (0,0,0,0,0,1)
326 data_info (TyData _ _ _ _ _ nconstrs derivs _ _ _ _)
327 = (nconstrs, case derivs of {Nothing -> 0; Just ds -> length ds})
328 data_info other = (0,0)
330 class_info (ClassDecl _ _ _ _ meth_sigs def_meths _ _ _ )
331 = case count_sigs meth_sigs of
333 (classops, addpr (count_monobinds def_meths))
334 class_info other = (0,0)
336 inst_info (InstDecl _ inst_meths inst_sigs _ _)
337 = case count_sigs inst_sigs of
339 (addpr (count_monobinds inst_meths), ss, is)
341 addpr :: (Int,Int) -> Int
342 add1 :: Int -> Int -> Int
343 add2 :: (Int,Int) -> (Int,Int) -> (Int, Int)
344 add3 :: (Int,Int,Int) -> (Int,Int,Int) -> (Int, Int, Int)
345 add4 :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
346 add5 :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
347 add6 :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)
351 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
352 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
353 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
354 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
355 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)
362 reportCompile :: ModuleName -> String -> IO ()
363 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
364 reportCompile mod_name info
365 | not opt_ReportCompile = return ()
369 sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
370 ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
371 return ()) `catch` (\ _ -> return ())
373 motherShip :: IO SockAddr
375 he <- getHostByName "laysan.dcs.gla.ac.uk"
376 case (hostAddresses he) of
377 [] -> IOERROR (userError "No address!")
378 (x:_) -> return (SockAddrInet motherShipPort x)
381 motherShipPort :: PortNumber
382 motherShipPort = mkPortNumber 12345
384 -- creates a socket capable of sending datagrams,
385 -- binding it to a port
386 -- ( 0 => have the system pick next available port no.)
387 udpSocket :: Int -> IO Socket
389 pr <- getProtocolNumber "udp"
390 s <- socket AF_INET Datagram pr
391 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
394 reportCompile _ _ = return ()