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 CoreLint ( endPass )
29 import CoreUtils ( coreBindsSize )
30 import CoreTidy ( tidyCorePgm )
31 import CoreToStg ( topCoreBindsToStg )
32 import StgSyn ( collectFinalStgBinders, pprStgBindings )
33 import SimplStg ( stg2stg )
34 import CodeGen ( codeGen )
35 import CodeOutput ( codeOutput )
37 import Module ( ModuleName, moduleNameUserString )
38 import AbsCSyn ( absCNop )
40 import ErrUtils ( ghcExit, doIfSet, dumpIfSet )
41 import Maybes ( maybeToBool, MaybeErr(..) )
42 import TyCon ( isDataTyCon )
43 import Class ( classTyCon )
44 import UniqSupply ( mkSplitUniqSupply )
46 import FiniteMap ( emptyFM )
48 import Char ( isSpace )
49 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
52 import IOExts ( unsafePerformIO )
53 import NativeInfo ( os, arch )
59 main = stderr `seq` -- Bug fix. Sigh
65 parseModule :: IO (ModuleName, RdrNameHsModule)
67 buf <- hGetStringBuffer True{-expand tabs-} (unpackFS src_filename)
68 case parse buf PState{ bol = 0#, atbol = 1#,
69 context = [], glasgow_exts = glaexts,
70 loc = mkSrcLoc src_filename 1 } of
75 return (error "parseModule") -- just to get the types right
77 POk _ m@(HsModule mod _ _ _ _ _ _) ->
80 glaexts | opt_GlasgowExts = 1#
85 doIt :: ([CoreToDo], [StgToDo]) -> IO ()
87 doIt (core_cmds, stg_cmds)
89 (hPutStr stderr "Glasgow Haskell Compiler, version " >>
90 hPutStr stderr compiler_version >>
91 hPutStr stderr ", for Haskell 98, compiled by GHC version " >>
92 hPutStr stderr booter_version >>
93 hPutStr stderr "\n") >>
95 -------------------------- Reader ----------------
98 parseModule >>= \ (mod_name, rdr_module) ->
100 dumpIfSet opt_D_dump_parsed "Parser" (ppr rdr_module) >>
102 dumpIfSet opt_D_source_stats "Source Statistics"
103 (ppSourceStats False rdr_module) >>
105 -- UniqueSupplies for later use (these are the only lower case uniques)
106 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
107 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
108 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
109 mkSplitUniqSupply 'r' >>= \ ru_uniqs -> -- rules
110 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
111 mkSplitUniqSupply 'u' >>= \ tidy_uniqs -> -- tidy up
112 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
113 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
115 -------------------------- Rename ----------------
116 show_pass "Renamer" >>
119 renameModule rn_uniqs rdr_module >>= \ maybe_rn_stuff ->
120 case maybe_rn_stuff of {
121 Nothing -> -- Hurrah! Renamer reckons that there's no need to
123 reportCompile mod_name "Compilation NOT required!" >>
126 Just (this_mod, rn_mod,
127 old_iface, new_iface,
128 rn_name_supply, fixity_env,
130 -- Oh well, we've got to recompile for real
133 -------------------------- Typechecking ----------------
134 show_pass "TypeCheck" >>
136 typecheckModule tc_uniqs rn_name_supply
137 fixity_env rn_mod >>= \ maybe_tc_stuff ->
138 case maybe_tc_stuff of {
139 Nothing -> ghcExit 1; -- Type checker failed
141 Just (tc_results@(TcResults {tc_tycons = local_tycons,
142 tc_classes = local_classes,
143 tc_insts = inst_info })) ->
146 -------------------------- Desugaring ----------------
148 deSugar this_mod ds_uniqs tc_results >>= \ (desugared, rules, h_code, c_code, fe_binders) ->
151 -------------------------- Main Core-language transformations ----------------
153 core2core core_cmds desugared rules >>= \ (simplified, orphan_rules) ->
155 -- Do the final tidy-up
156 tidyCorePgm tidy_uniqs this_mod
157 simplified orphan_rules >>= \ (tidy_binds, tidy_orphan_rules) ->
159 coreBindsSize tidy_binds `seq`
160 -- TEMP: the above call zaps some space usage allocated by the
161 -- simplifier, which for reasons I don't understand, persists
162 -- thoroughout code generation
166 -------------------------- Convert to STG code -------------------------------
167 show_pass "Core2Stg" >>
170 stg_binds = topCoreBindsToStg c2s_uniqs tidy_binds
173 -------------------------- Simplify STG code -------------------------------
174 show_pass "Stg2Stg" >>
176 stg2stg stg_cmds this_mod st_uniqs stg_binds >>= \ (stg_binds2, cost_centre_info) ->
179 -------------------------- Interface file -------------------------------
180 -- Dump instance decls and type signatures into the interface file
183 final_ids = collectFinalStgBinders (map fst stg_binds2)
185 writeIface this_mod old_iface new_iface
186 local_tycons local_classes inst_info
187 final_ids tidy_binds tidy_orphan_rules >>
190 -------------------------- Code generation -------------------------------
191 show_pass "CodeGen" >>
193 codeGen this_mod imported_modules
196 local_tycons local_classes
197 stg_binds2 >>= \ abstractC ->
200 -------------------------- Code output -------------------------------
201 show_pass "CodeOutput" >>
203 codeOutput this_mod local_tycons local_classes
204 tidy_binds stg_binds2
205 c_code h_code abstractC
209 -------------------------- Final report -------------------------------
210 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)
359 compiler_version :: String
361 case (show opt_HiVersion) of
363 ls@[x,y] -> "0." ++ ls
366 -- 10232353 => 10232.53
372 \ __GLASGOW_HASKELL__" of
378 reportCompile :: ModuleName -> String -> IO ()
379 #if REPORT_TO_MOTHERLODE && __GLASGOW_HASKELL__ >= 303
380 reportCompile mod_name info
381 | not opt_ReportCompile = return ()
385 sendTo sock (moduleNameUserString mod_name ++ ';': compiler_version ++
386 ';': os ++ ';':arch ++ '\n':' ':info ++ "\n") addr
387 return ()) `catch` (\ _ -> return ())
389 motherShip :: IO SockAddr
391 he <- getHostByName "laysan.dcs.gla.ac.uk"
392 case (hostAddresses he) of
393 [] -> IOERROR (userError "No address!")
394 (x:_) -> return (SockAddrInet motherShipPort x)
397 motherShipPort :: PortNumber
398 motherShipPort = mkPortNumber 12345
400 -- creates a socket capable of sending datagrams,
401 -- binding it to a port
402 -- ( 0 => have the system pick next available port no.)
403 udpSocket :: Int -> IO Socket
405 pr <- getProtocolNumber "udp"
406 s <- socket AF_INET Datagram pr
407 bindSocket s (SockAddrInet (mkPortNumber p) iNADDR_ANY)
410 reportCompile _ _ = return ()