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 pcs =
65 -------------------------- Reader ----------------
69 buf <- hGetStringBuffer True{-expand tabs-} src_filename
71 let glaexts | opt_GlasgowExts = 1#
74 case parse buf PState{ bol = 0#, atbol = 1#,
75 context = [], glasgow_exts = glaexts,
76 loc = mkSrcLoc src_filename 1 } of {
78 PFailed err -> return (CompErrs pcs err);
80 POk _ rdr_module@(HsModule mod_name _ _ _ _ _ _) ->
82 dumpIfSet (dopt_D_dump_parsed flags) "Parser" (ppr rdr_module) >>
84 dumpIfSet (dopt_D_source_stats flags) "Source Statistics"
85 (ppSourceStats False rdr_module) >>
87 -- UniqueSupplies for later use (these are the only lower case uniques)
88 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
89 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
90 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
91 mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
92 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
93 mkSplitUniqSupply 'u' >>= \ tidy_uniqs -> -- tidy up
94 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
95 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
97 -------------------------- Rename ----------------
98 show_pass "Renamer" >>
101 renameModule rn_uniqs rdr_module >>= \ maybe_rn_stuff ->
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 (this_mod, rn_mod,
109 old_iface, new_iface,
110 rn_name_supply, fixity_env,
112 -- Oh well, we've got to recompile for real
115 -------------------------- Typechecking ----------------
116 show_pass "TypeCheck" >>
118 typecheckModule tc_uniqs rn_name_supply
119 fixity_env rn_mod >>= \ maybe_tc_stuff ->
120 case maybe_tc_stuff of {
121 Nothing -> ghcExit 1; -- Type checker failed
123 Just (tc_results@(TcResults {tc_tycons = local_tycons,
124 tc_classes = local_classes,
125 tc_insts = inst_info })) ->
128 -------------------------- Desugaring ----------------
130 deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
133 -------------------------- Main Core-language transformations ----------------
135 core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
137 -- Do the final tidy-up
138 tidyCorePgm tidy_uniqs this_mod
139 simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
141 -- Run the occurrence analyser one last time, so that
142 -- dead binders get dead-binder info. This is exploited by
143 -- code generators to avoid spitting out redundant bindings.
144 -- The occurrence-zapping in Simplify.simplCaseBinder means
145 -- that the Simplifier nukes useful dead-var stuff especially
147 let occ_anal_tidy_binds = occurAnalyseBinds tidy_binds in
149 coreBindsSize occ_anal_tidy_binds `seq`
150 -- TEMP: the above call zaps some space usage allocated by the
151 -- simplifier, which for reasons I don't understand, persists
152 -- thoroughout code generation
156 -------------------------- Convert to STG code -------------------------------
157 show_pass "Core2Stg" >>
160 stg_binds = topCoreBindsToStg c2s_uniqs occ_anal_tidy_binds
163 -------------------------- Simplify STG code -------------------------------
164 show_pass "Stg2Stg" >>
166 stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
169 runStgI local_tycons local_classes
170 (map fst stg_binds2) >>= \ i_result ->
171 putStr ("\nANSWER = " ++ show i_result ++ "\n\n")
175 -------------------------- Interface file -------------------------------
176 -- Dump instance decls and type signatures into the interface file
179 final_ids = collectFinalStgBinders (map fst stg_binds2)
181 writeIface this_mod old_iface new_iface
182 local_tycons local_classes inst_info
183 final_ids occ_anal_tidy_binds tidy_orphan_rules >>
186 -------------------------- Code generation -------------------------------
187 show_pass "CodeGen" >>
189 codeGen this_mod imported_modules
192 local_tycons local_classes
193 stg_binds2 >>= \ abstractC ->
196 -------------------------- Code output -------------------------------
197 show_pass "CodeOutput" >>
199 codeOutput this_mod local_tycons local_classes
200 occ_anal_tidy_binds stg_binds2
201 c_code h_code abstractC
205 -------------------------- Final report -------------------------------
206 reportCompile mod_name (showSDoc (ppSourceStats True rdr_module)) >>
214 -------------------------------------------------------------
215 -- ****** help functions:
218 = if opt_D_show_passes
219 then \ what -> hPutStr stderr ("*** "++what++":\n")
220 else \ what -> return ()
222 ppSourceStats short (HsModule name version exports imports decls _ src_loc)
223 = (if short then hcat else vcat)
225 [("ExportAll ", export_all), -- 1 if no export list
226 ("ExportDecls ", export_ds),
227 ("ExportModules ", export_ms),
228 ("Imports ", import_no),
229 (" ImpQual ", import_qual),
230 (" ImpAs ", import_as),
231 (" ImpAll ", import_all),
232 (" ImpPartial ", import_partial),
233 (" ImpHiding ", import_hiding),
234 ("FixityDecls ", fixity_ds),
235 ("DefaultDecls ", default_ds),
236 ("TypeDecls ", type_ds),
237 ("DataDecls ", data_ds),
238 ("NewTypeDecls ", newt_ds),
239 ("DataConstrs ", data_constrs),
240 ("DataDerivings ", data_derivs),
241 ("ClassDecls ", class_ds),
242 ("ClassMethods ", class_method_ds),
243 ("DefaultMethods ", default_method_ds),
244 ("InstDecls ", inst_ds),
245 ("InstMethods ", inst_method_ds),
246 ("TypeSigs ", bind_tys),
247 ("ValBinds ", val_bind_ds),
248 ("FunBinds ", fn_bind_ds),
249 ("InlineMeths ", method_inlines),
250 ("InlineBinds ", bind_inlines),
251 -- ("SpecialisedData ", data_specs),
252 -- ("SpecialisedInsts ", inst_specs),
253 ("SpecialisedMeths ", method_specs),
254 ("SpecialisedBinds ", bind_specs)
257 pp_val (str, 0) = empty
259 | not short = hcat [text str, int n]
260 | otherwise = hcat [text (trim str), equals, int n, semi]
262 trim ls = takeWhile (not.isSpace) (dropWhile isSpace ls)
264 fixity_ds = length [() | FixD d <- decls]
265 -- NB: this omits fixity decls on local bindings and
266 -- in class decls. ToDo
268 tycl_decls = [d | TyClD d <- decls]
269 (class_ds, data_ds, newt_ds, type_ds) = countTyClDecls tycl_decls
271 inst_decls = [d | InstD d <- decls]
272 inst_ds = length inst_decls
273 default_ds = length [() | DefD _ <- decls]
274 val_decls = [d | ValD d <- decls]
276 real_exports = case exports of { Nothing -> []; Just es -> es }
277 n_exports = length real_exports
278 export_ms = length [() | IEModuleContents _ <- real_exports]
279 export_ds = n_exports - export_ms
280 export_all = case exports of { Nothing -> 1; other -> 0 }
282 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
283 = count_binds (foldr ThenBinds EmptyBinds val_decls)
285 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
286 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
287 (data_constrs, data_derivs)
288 = foldr add2 (0,0) (map data_info tycl_decls)
289 (class_method_ds, default_method_ds)
290 = foldr add2 (0,0) (map class_info tycl_decls)
291 (inst_method_ds, method_specs, method_inlines)
292 = foldr add3 (0,0,0) (map inst_info inst_decls)
295 count_binds EmptyBinds = (0,0,0,0,0)
296 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
297 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
298 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
300 count_monobinds EmptyMonoBinds = (0,0)
301 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
302 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
303 count_monobinds (PatMonoBind p r _) = (0,1)
304 count_monobinds (FunMonoBind f _ m _) = (0,1)
306 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
308 sig_info (Sig _ _ _) = (1,0,0,0)
309 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
310 sig_info (SpecSig _ _ _) = (0,0,1,0)
311 sig_info (InlineSig _ _ _) = (0,0,0,1)
312 sig_info (NoInlineSig _ _ _) = (0,0,0,1)
313 sig_info _ = (0,0,0,0)
315 import_info (ImportDecl _ _ qual as spec _)
316 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
321 spec_info Nothing = (0,0,0,1,0,0)
322 spec_info (Just (False, _)) = (0,0,0,0,1,0)
323 spec_info (Just (True, _)) = (0,0,0,0,0,1)
325 data_info (TyData _ _ _ _ _ nconstrs derivs _ _ _ _)
326 = (nconstrs, case derivs of {Nothing -> 0; Just ds -> length ds})
327 data_info other = (0,0)
329 class_info (ClassDecl _ _ _ _ meth_sigs def_meths _ _ _ )
330 = case count_sigs meth_sigs of
332 (classops, addpr (count_monobinds def_meths))
333 class_info other = (0,0)
335 inst_info (InstDecl _ inst_meths inst_sigs _ _)
336 = case count_sigs inst_sigs of
338 (addpr (count_monobinds inst_meths), ss, is)
340 addpr :: (Int,Int) -> Int
341 add1 :: Int -> Int -> Int
342 add2 :: (Int,Int) -> (Int,Int) -> (Int, Int)
343 add3 :: (Int,Int,Int) -> (Int,Int,Int) -> (Int, Int, Int)
344 add4 :: (Int,Int,Int,Int) -> (Int,Int,Int,Int) -> (Int, Int, Int, Int)
345 add5 :: (Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int)
346 add6 :: (Int,Int,Int,Int,Int,Int) -> (Int,Int,Int,Int,Int,Int) -> (Int, Int, Int, Int, Int, Int)
350 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
351 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
352 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
353 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
354 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)
361 reportCompile :: ModuleName -> String -> IO ()
362 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
363 reportCompile mod_name info
364 | not opt_ReportCompile = return ()
368 sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
369 ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
370 return ()) `catch` (\ _ -> return ())
372 motherShip :: IO SockAddr
374 he <- getHostByName "laysan.dcs.gla.ac.uk"
375 case (hostAddresses he) of
376 [] -> IOERROR (userError "No address!")
377 (x:_) -> return (SockAddrInet motherShipPort x)
380 motherShipPort :: PortNumber
381 motherShipPort = mkPortNumber 12345
383 -- creates a socket capable of sending datagrams,
384 -- binding it to a port
385 -- ( 0 => have the system pick next available port no.)
386 udpSocket :: Int -> IO Socket
388 pr <- getProtocolNumber "udp"
389 s <- socket AF_INET Datagram pr
390 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
393 reportCompile _ _ = return ()