2 % (c) The GRASP/AQUA Project, Glasgow University, 1993-1996
4 \section[GHC_Main]{Main driver for Glasgow Haskell compiler}
7 #include "HsVersions.h"
9 module Main ( main ) where
12 IMPORT_1_3(IO(hGetContents,stdin,stderr,hPutStr,hClose,openFile,IOMode(..)))
15 import RdrHsSyn ( RdrName )
16 import BasicTypes ( NewOrData(..) )
18 import ReadPrefix ( rdModule )
19 import Rename ( renameModule )
20 import RnMonad ( ExportEnv )
22 import MkIface -- several functions
23 import TcModule ( typecheckModule )
24 import Desugar ( deSugar, pprDsWarnings
25 #if __GLASGOW_HASKELL__ <= 200
26 , DsMatchContext, DsWarnFlavour
29 import SimplCore ( core2core )
30 import CoreToStg ( topCoreBindsToStg )
31 import StgSyn ( collectFinalStgBinders )
32 import SimplStg ( stg2stg )
33 import CodeGen ( codeGen )
34 #if ! OMIT_NATIVE_CODEGEN
35 import AsmCodeGen ( dumpRealAsm, writeRealAsm )
38 import AbsCSyn ( absCNop, AbstractC )
39 import AbsCUtils ( flattenAbsC )
40 import CoreUnfold ( Unfolding )
41 import Bag ( emptyBag, isEmptyBag )
43 import ErrUtils ( pprBagOfErrors, ghcExit )
44 import Maybes ( maybeToBool, MaybeErr(..) )
45 import Specialise ( SpecialiseData(..) )
46 import StgSyn ( pprPlainStgBinding, GenStgBinding )
47 import TcInstUtil ( InstInfo )
48 import TyCon ( isDataTyCon )
49 import UniqSupply ( mkSplitUniqSupply )
51 import PprAbsC ( dumpRealC, writeRealC )
52 import PprCore ( pprCoreBinding )
53 import Outputable ( PprStyle(..), Outputable(..) )
56 import Id ( GenId ) -- instances
57 import Name ( Name ) -- instances
58 import PprType ( GenType, GenTyVar ) -- instances
59 import TyVar ( GenTyVar ) -- instances
60 import Unique ( Unique ) -- instances
66 hGetContents stdin >>= \ input_pgm ->
68 cmd_line_info = classifyOpts
70 doIt cmd_line_info input_pgm
74 doIt :: ([CoreToDo], [StgToDo]) -> String -> IO ()
76 doIt (core_cmds, stg_cmds) input_pgm
77 = doDump opt_Verbose ("Glasgow Haskell Compiler, version " ++ show PROJECTVERSION ++ ", for Haskell 1.4" "") >>
81 rdModule >>= \ (mod_name, rdr_module) ->
83 doDump opt_D_dump_rdr "Reader:"
84 (pp_show (ppr pprStyle rdr_module)) >>
86 doDump opt_D_source_stats "\nSource Statistics:"
87 (pp_show (ppSourceStats rdr_module)) >>
89 -- UniqueSupplies for later use (these are the only lower case uniques)
91 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
93 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
95 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
97 mkSplitUniqSupply 's' >>= \ sm_uniqs -> -- core-to-core simplifier
99 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
101 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
103 mkSplitUniqSupply 'f' >>= \ fl_uniqs -> -- absC flattener
105 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
108 show_pass "Renamer" >>
111 renameModule rn_uniqs rdr_module >>=
112 \ (maybe_rn_stuff, rn_errs_bag, rn_warns_bag) ->
114 checkErrors rn_errs_bag rn_warns_bag >>
115 case maybe_rn_stuff of {
116 Nothing -> -- Hurrah! Renamer reckons that there's no need to
120 -- Oh well, we've got to recompile for real
121 Just (rn_mod, iface_file_stuff, rn_name_supply, imported_modules) ->
125 doDump opt_D_dump_rn "Renamer:"
126 (pp_show (ppr pprStyle rn_mod)) >>
128 -- Safely past renaming: we can start the interface file:
129 -- (the iface file is produced incrementally, as we have
130 -- the information that we need...; we use "iface<blah>")
131 -- "endIface" finishes the job.
132 startIface mod_name >>= \ if_handle ->
133 ifaceMain if_handle iface_file_stuff >>
136 -- ******* TYPECHECKER
137 show_pass "TypeCheck" >>
139 case (case (typecheckModule tc_uniqs {-idinfo_fm-} rn_name_supply rn_mod) of
140 Succeeded (stuff, warns)
141 -> (emptyBag, warns, stuff)
143 -> (errs, warns, error "tc_results"))
145 of { (tc_errs_bag, tc_warns_bag, tc_results) ->
147 checkErrors tc_errs_bag tc_warns_bag >>
151 local_tycons, local_classes, inst_info, pragma_tycon_specs,
154 doDump opt_D_dump_tc "Typechecked:"
155 (pp_show (ppr pprStyle all_binds)) >>
157 doDump opt_D_dump_deriv "Derived instances:"
158 (pp_show (ddump_deriv pprStyle)) >>
161 show_pass "DeSugar" >>
164 (desugared,ds_warnings)
165 = deSugar ds_uniqs mod_name all_binds
167 (if isEmptyBag ds_warnings then
170 hPutStr stderr (pp_show (pprDsWarnings pprErrorsStyle ds_warnings))
171 >> hPutStr stderr "\n"
174 doDump opt_D_dump_ds "Desugared:" (pp_show (vcat
175 (map (pprCoreBinding pprStyle) desugared)))
178 -- ******* CORE-TO-CORE SIMPLIFICATION (NB: I/O op)
179 show_pass "Core2Core" >>
182 local_data_tycons = filter isDataTyCon local_tycons
184 core2core core_cmds mod_name pprStyle
185 sm_uniqs local_data_tycons pragma_tycon_specs desugared
189 SpecData _ _ _ gen_data_tycons all_tycon_specs _ _ _) ->
191 doDump opt_D_dump_simpl "Simplified:" (pp_show (vcat
192 (map (pprCoreBinding pprStyle) simplified)))
195 -- ******* STG-TO-STG SIMPLIFICATION
196 show_pass "Core2Stg" >>
199 stg_binds = topCoreBindsToStg c2s_uniqs simplified
202 show_pass "Stg2Stg" >>
204 stg2stg stg_cmds mod_name pprStyle st_uniqs stg_binds
207 \ (stg_binds2, cost_centre_info) ->
209 doDump opt_D_dump_stg "STG syntax:"
210 (pp_show (vcat (map (pprPlainStgBinding pprStyle) stg_binds2)))
213 -- Dump instance decls and type signatures into the interface file
215 final_ids = collectFinalStgBinders stg_binds2
218 ifaceDecls if_handle local_tycons local_classes inst_info final_ids simplified >>
219 endIface if_handle >>
220 -- We are definitely done w/ interface-file stuff at this point:
221 -- (See comments near call to "startIface".)
224 -- ******* "ABSTRACT", THEN "FLAT", THEN *REAL* C!
225 show_pass "CodeGen" >>
228 abstractC = codeGen mod_name -- module name for CC labelling
230 imported_modules -- import names for CC registering
231 gen_data_tycons -- type constructors generated locally
232 all_tycon_specs -- tycon specialisations
235 flat_abstractC = flattenAbsC fl_uniqs abstractC
237 doDump opt_D_dump_absC "Abstract C:"
238 (dumpRealC abstractC) >>
240 doDump opt_D_dump_flatC "Flat Abstract C:"
241 (dumpRealC flat_abstractC) >>
243 show_pass "CodeOutput" >>
245 -- You can have C (c_output) or assembly-language (ncg_output),
246 -- but not both. [Allowing for both gives a space leak on
247 -- flat_abstractC. WDP 94/10]
249 (flat_absC_c, flat_absC_ncg) =
250 case (maybeToBool opt_ProduceC || opt_D_dump_realC,
251 maybeToBool opt_ProduceS || opt_D_dump_asm) of
252 (True, False) -> (flat_abstractC, absCNop)
253 (False, True) -> (absCNop, flat_abstractC)
254 (False, False) -> (absCNop, absCNop)
255 (True, True) -> error "ERROR: Can't do both .hc and .s at the same time"
257 c_output_d = dumpRealC flat_absC_c
258 c_output_w = (\ f -> writeRealC f flat_absC_c)
260 #if OMIT_NATIVE_CODEGEN
261 ncg_output_d = error "*** GHC not built with a native-code generator ***"
262 ncg_output_w = ncg_output_d
264 ncg_output_d = dumpRealAsm flat_absC_ncg ncg_uniqs
265 ncg_output_w = (\ f -> writeRealAsm f flat_absC_ncg ncg_uniqs)
269 doDump opt_D_dump_asm "" ncg_output_d >>
270 doOutput opt_ProduceS ncg_output_w >>
272 doDump opt_D_dump_realC "" c_output_d >>
273 doOutput opt_ProduceC c_output_w >>
278 -------------------------------------------------------------
279 -- ****** printing styles and column width:
282 -------------------------------------------------------------
283 -- ****** help functions:
286 = if opt_D_show_passes
287 then \ what -> hPutStr stderr ("*** "++what++":\n")
288 else \ what -> return ()
290 doOutput switch io_action
294 openFile fname WriteMode >>= \ handle ->
298 doDump switch hdr string
300 then hPutStr stderr ("\n\n" ++ (take 80 $ repeat '=')) >>
301 hPutStr stderr ('\n': hdr) >>
302 hPutStr stderr ('\n': string) >>
307 pprCols = (80 :: Int) -- could make configurable
309 (pprStyle, pprErrorsStyle)
310 | opt_PprStyle_All = (PprShowAll, PprShowAll)
311 | opt_PprStyle_Debug = (PprDebug, PprDebug)
312 | opt_PprStyle_User = (PprQuote, PprQuote)
313 | otherwise = (PprDebug, PprQuote)
315 pp_show p = show p -- ToDo: use pprCols
317 checkErrors errs_bag warns_bag
318 | not (isEmptyBag errs_bag)
319 = hPutStr stderr (pp_show (pprBagOfErrors pprErrorsStyle errs_bag))
320 >> hPutStr stderr "\n" >>
321 hPutStr stderr (pp_show (pprBagOfErrors pprErrorsStyle warns_bag))
322 >> hPutStr stderr "\n" >>
325 | not (isEmptyBag warns_bag)
326 = hPutStr stderr (pp_show (pprBagOfErrors pprErrorsStyle warns_bag)) >>
329 | otherwise = return ()
332 ppSourceStats (HsModule name version exports imports fixities decls src_loc)
334 [("ExportAll ", export_all), -- 1 if no export list
335 ("ExportDecls ", export_ds),
336 ("ExportModules ", export_ms),
337 ("Imports ", import_no),
338 (" ImpQual ", import_qual),
339 (" ImpAs ", import_as),
340 (" ImpAll ", import_all),
341 (" ImpPartial ", import_partial),
342 (" ImpHiding ", import_hiding),
343 ("FixityDecls ", fixity_ds),
344 ("DefaultDecls ", default_ds),
345 ("TypeDecls ", type_ds),
346 ("DataDecls ", data_ds),
347 ("NewTypeDecls ", newt_ds),
348 ("DataConstrs ", data_constrs),
349 ("DataDerivings ", data_derivs),
350 ("ClassDecls ", class_ds),
351 ("ClassMethods ", class_method_ds),
352 ("DefaultMethods ", default_method_ds),
353 ("InstDecls ", inst_ds),
354 ("InstMethods ", inst_method_ds),
355 ("TypeSigs ", bind_tys),
356 ("ValBinds ", val_bind_ds),
357 ("FunBinds ", fn_bind_ds),
358 ("InlineMeths ", method_inlines),
359 ("InlineBinds ", bind_inlines),
360 -- ("SpecialisedData ", data_specs),
361 -- ("SpecialisedInsts ", inst_specs),
362 ("SpecialisedMeths ", method_specs),
363 ("SpecialisedBinds ", bind_specs)
366 pp_val (str, 0) = empty
367 pp_val (str, n) = hcat [text str, int n]
369 fixity_ds = length fixities
370 type_decls = [d | TyD d@(TySynonym _ _ _ _) <- decls]
371 data_decls = [d | TyD d@(TyData DataType _ _ _ _ _ _ _) <- decls]
372 newt_decls = [d | TyD d@(TyData NewType _ _ _ _ _ _ _) <- decls]
373 type_ds = length type_decls
374 data_ds = length data_decls
375 newt_ds = length newt_decls
376 class_decls = [d | ClD d <- decls]
377 class_ds = length class_decls
378 inst_decls = [d | InstD d <- decls]
379 inst_ds = length inst_decls
380 default_ds = length [() | DefD _ <- decls]
381 val_decls = [d | ValD d <- decls]
383 real_exports = case exports of { Nothing -> []; Just es -> es }
384 n_exports = length real_exports
385 export_ms = length [() | IEModuleContents _ <- real_exports]
386 export_ds = n_exports - export_ms
387 export_all = case exports of { Nothing -> 1; other -> 0 }
389 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
390 = count_binds (foldr ThenBinds EmptyBinds val_decls)
392 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
393 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
394 (data_constrs, data_derivs)
395 = foldr add2 (0,0) (map data_info (newt_decls ++ data_decls))
396 (class_method_ds, default_method_ds)
397 = foldr add2 (0,0) (map class_info class_decls)
398 (inst_method_ds, method_specs, method_inlines)
399 = foldr add3 (0,0,0) (map inst_info inst_decls)
402 count_binds EmptyBinds = (0,0,0,0,0)
403 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
404 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
405 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
407 count_monobinds EmptyMonoBinds = (0,0)
408 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
409 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
410 count_monobinds (PatMonoBind p r _) = (0,1)
411 count_monobinds (FunMonoBind f _ m _) = (0,1)
413 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
415 sig_info (Sig _ _ _) = (1,0,0,0)
416 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
417 sig_info (SpecSig _ _ _ _) = (0,0,1,0)
418 sig_info (InlineSig _ _) = (0,0,0,1)
419 sig_info _ = (0,0,0,0)
421 import_info (ImportDecl _ qual _ as spec _)
422 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
427 spec_info Nothing = (0,0,0,1,0,0)
428 spec_info (Just (False, _)) = (0,0,0,0,1,0)
429 spec_info (Just (True, _)) = (0,0,0,0,0,1)
431 data_info (TyData _ _ _ _ constrs derivs _ _)
432 = (length constrs, case derivs of {Nothing -> 0; Just ds -> length ds})
434 class_info (ClassDecl _ _ _ meth_sigs def_meths _ _)
435 = case count_sigs meth_sigs of
437 (classops, addpr (count_monobinds def_meths))
439 inst_info (InstDecl _ inst_meths inst_sigs _ _)
440 = case count_sigs inst_sigs of
442 (addpr (count_monobinds inst_meths), ss, is)
446 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
447 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
448 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
449 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
450 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)