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
13 import PreludeGlaST ( thenPrimIO, _FILE{-instances-} ) -- ToDo: STOP using this...
18 import ReadPrefix ( rdModule )
19 import Rename ( renameModule )
20 import Typecheck ( typecheckModule, InstInfo )
21 import Desugar ( deSugar, DsMatchContext, pprDsWarnings )
22 import SimplCore ( core2core )
23 import CoreToStg ( topCoreBindsToStg )
24 import SimplStg ( stg2stg )
25 import CodeGen ( codeGen )
26 #if ! OMIT_NATIVE_CODEGEN
27 import AsmCodeGen ( dumpRealAsm, writeRealAsm )
30 import AbsCSyn ( absCNop, AbstractC )
31 import AbsCUtils ( flattenAbsC )
32 import Bag ( emptyBag, isEmptyBag )
34 import ErrUtils ( pprBagOfErrors )
35 import Maybes ( maybeToBool, MaybeErr(..) )
36 import PrelInfo ( builtinNameInfo )
37 import RdrHsSyn ( getRawExportees )
38 import Specialise ( SpecialiseData(..) )
39 import StgSyn ( pprPlainStgBinding, GenStgBinding )
41 import PprAbsC ( dumpRealC, writeRealC )
42 import PprCore ( pprCoreBinding )
43 import PprStyle ( PprStyle(..) )
46 import Id ( GenId ) -- instances
47 import Name ( Name, RdrName ) -- instances
48 import PprType ( GenType, GenTyVar ) -- instances
49 import RnHsSyn ( RnName ) -- instances
50 import TyVar ( GenTyVar ) -- instances
51 import Unique ( Unique ) -- instances
54 --import MkIface ( mkInterface )
61 = readMn stdin `thenMn` \ input_pgm ->
63 cmd_line_info = classifyOpts
65 doIt cmd_line_info input_pgm
69 doIt :: ([CoreToDo], [StgToDo]) -> String -> MainIO ()
71 doIt (core_cmds, stg_cmds) input_pgm
72 = doDump opt_Verbose "Glasgow Haskell Compiler, version 1.3-xx" ""
76 show_pass "Reader" `thenMn_`
79 \ (mod_name, rdr_module) ->
82 -- reader things used much later
83 ds_mod_name = mod_name
84 if_mod_name = mod_name
85 co_mod_name = mod_name
86 st_mod_name = mod_name
87 cc_mod_name = mod_name
89 doDump opt_D_dump_rdr "Reader:"
90 (pp_show (ppr pprStyle rdr_module)) `thenMn_`
92 doDump opt_D_source_stats "\nSource Statistics:"
93 (pp_show (ppSourceStats rdr_module)) `thenMn_`
95 -- UniqueSupplies for later use (these are the only lower case uniques)
96 getSplitUniqSupplyMn 'r' `thenMn` \ rn_uniqs -> -- renamer
97 getSplitUniqSupplyMn 't' `thenMn` \ tc_uniqs -> -- typechecker
98 getSplitUniqSupplyMn 'd' `thenMn` \ ds_uniqs -> -- desugarer
99 getSplitUniqSupplyMn 's' `thenMn` \ sm_uniqs -> -- core-to-core simplifier
100 getSplitUniqSupplyMn 'c' `thenMn` \ c2s_uniqs -> -- core-to-stg
101 getSplitUniqSupplyMn 'g' `thenMn` \ st_uniqs -> -- stg-to-stg passes
102 getSplitUniqSupplyMn 'f' `thenMn` \ fl_uniqs -> -- absC flattener
103 getSplitUniqSupplyMn 'n' `thenMn` \ ncg_uniqs -> -- native-code generator
106 show_pass "Renamer" `thenMn_`
109 of { (wiredin_fm, key_fm, idinfo_fm) ->
111 renameModule wiredin_fm key_fm rn_uniqs rdr_module `thenMn`
112 \ (rn_mod, rn_env, import_names,
113 version_info, instance_modules,
114 rn_errs_bag, rn_warns_bag) ->
116 if (not (isEmptyBag rn_errs_bag)) then
117 writeMn stderr (ppShow pprCols (pprBagOfErrors pprErrorsStyle rn_errs_bag))
118 `thenMn_` writeMn stderr "\n" `thenMn_`
119 writeMn stderr (ppShow pprCols (pprBagOfErrors pprErrorsStyle rn_warns_bag))
120 `thenMn_` writeMn stderr "\n" `thenMn_`
123 else -- No renaming errors ...
125 (if (isEmptyBag rn_warns_bag) then
128 writeMn stderr (ppShow pprCols (pprBagOfErrors pprErrorsStyle rn_warns_bag))
129 `thenMn_` writeMn stderr "\n"
132 doDump opt_D_dump_rn "Renamer:"
133 (pp_show (ppr pprStyle rn_mod)) `thenMn_`
138 -- ******* TYPECHECKER
139 show_pass "TypeCheck" `thenMn_`
140 case (case (typecheckModule tc_uniqs {-idinfo_fm-} rn_env rn_mod) of
141 Succeeded (stuff, warns)
142 -> (emptyBag, warns, stuff)
144 -> (errs, warns, error "tc_results"))
146 of { (tc_errs_bag, tc_warns_bag, tc_results) ->
148 if (not (isEmptyBag tc_errs_bag)) then
149 writeMn stderr (ppShow pprCols (pprBagOfErrors pprErrorsStyle tc_errs_bag))
150 `thenMn_` writeMn stderr "\n" `thenMn_`
151 writeMn stderr (ppShow pprCols (pprBagOfErrors pprErrorsStyle tc_warns_bag))
152 `thenMn_` writeMn stderr "\n" `thenMn_`
155 else ( -- No typechecking errors ...
157 (if (isEmptyBag tc_warns_bag) then
160 writeMn stderr (ppShow pprCols (pprBagOfErrors pprErrorsStyle tc_warns_bag))
161 `thenMn_` writeMn stderr "\n"
165 of { (typechecked_quint@(recsel_binds, class_binds, inst_binds, val_binds, const_binds),
166 interface_stuff@(_,_,_,_,_), -- @-pat just for strictness...
167 (local_tycons,local_classes), pragma_tycon_specs, ddump_deriv) ->
169 doDump opt_D_dump_tc "Typechecked:"
171 ppr pprStyle recsel_binds,
172 ppr pprStyle class_binds,
173 ppr pprStyle inst_binds,
174 ppAboves (map (\ (i,e) -> ppr pprStyle (VarMonoBind i e)) const_binds),
175 ppr pprStyle val_binds])) `thenMn_`
177 doDump opt_D_dump_deriv "Derived instances:"
178 (pp_show (ddump_deriv pprStyle)) `thenMn_`
181 show_pass "DeSugar" `thenMn_`
183 (desugared,ds_warnings)
184 = deSugar ds_uniqs ds_mod_name typechecked_quint
186 (if isEmptyBag ds_warnings then
189 writeMn stderr (ppShow pprCols (pprDsWarnings pprErrorsStyle ds_warnings))
190 `thenMn_` writeMn stderr "\n"
193 doDump opt_D_dump_ds "Desugared:" (pp_show (ppAboves
194 (map (pprCoreBinding pprStyle) desugared)))
197 -- ******* CORE-TO-CORE SIMPLIFICATION (NB: I/O op)
198 core2core core_cmds co_mod_name pprStyle
199 sm_uniqs local_tycons pragma_tycon_specs desugared
202 \ (simplified, inlinings_env,
203 SpecData _ _ _ gen_tycons all_tycon_specs _ _ _) ->
205 doDump opt_D_dump_simpl "Simplified:" (pp_show (ppAboves
206 (map (pprCoreBinding pprStyle) simplified)))
209 -- ******* STG-TO-STG SIMPLIFICATION
210 show_pass "Core2Stg" `thenMn_`
212 stg_binds = topCoreBindsToStg c2s_uniqs simplified
215 show_pass "Stg2Stg" `thenMn_`
216 stg2stg stg_cmds st_mod_name pprStyle st_uniqs stg_binds
219 \ (stg_binds2, cost_centre_info) ->
221 doDump opt_D_dump_stg "STG syntax:"
222 (pp_show (ppAboves (map (pprPlainStgBinding pprStyle) stg_binds2)))
226 -- ******* INTERFACE GENERATION (needs STG output)
228 mod_name = "_TestName_"
229 export_list_fns = (\ x -> False, \ x -> False)
230 inlinings_env = nullIdEnv
235 if_inst_info = emptyBag
239 show_pass "Interface" `thenMn_`
242 = mkInterface if_mod_name export_list_fns
243 inlinings_env all_tycon_specs
247 doOutput opt_ProduceHi ( \ file ->
248 ppAppendFile file 1000{-pprCols-} mod_interface )
252 -- ******* "ABSTRACT", THEN "FLAT", THEN *REAL* C!
253 show_pass "CodeGen" `thenMn_`
255 abstractC = codeGen cc_mod_name -- module name for CC labelling
257 import_names -- import names for CC registering
258 gen_tycons -- type constructors generated locally
259 all_tycon_specs -- tycon specialisations
262 flat_abstractC = flattenAbsC fl_uniqs abstractC
264 doDump opt_D_dump_absC "Abstract C:"
265 (dumpRealC abstractC) `thenMn_`
267 doDump opt_D_dump_flatC "Flat Abstract C:"
268 (dumpRealC flat_abstractC) `thenMn_`
270 -- You can have C (c_output) or assembly-language (ncg_output),
271 -- but not both. [Allowing for both gives a space leak on
272 -- flat_abstractC. WDP 94/10]
274 (flat_absC_c, flat_absC_ncg) =
275 case (maybeToBool opt_ProduceC || opt_D_dump_realC,
276 maybeToBool opt_ProduceS || opt_D_dump_asm) of
277 (True, False) -> (flat_abstractC, absCNop)
278 (False, True) -> (absCNop, flat_abstractC)
279 (False, False) -> (absCNop, absCNop)
280 (True, True) -> error "ERROR: Can't do both .hc and .s at the same time"
282 c_output_d = dumpRealC flat_absC_c
283 c_output_w = (\ f -> writeRealC f flat_absC_c)
285 #if OMIT_NATIVE_CODEGEN
286 ncg_output_d = error "*** GHC not built with a native-code generator ***"
287 ncg_output_w = ncg_output_d
289 ncg_output_d = dumpRealAsm flat_absC_ncg ncg_uniqs
290 ncg_output_w = (\ f -> writeRealAsm f flat_absC_ncg ncg_uniqs)
294 doDump opt_D_dump_asm "" ncg_output_d `thenMn_`
295 doOutput opt_ProduceS ncg_output_w `thenMn_`
297 doDump opt_D_dump_realC "" c_output_d `thenMn_`
298 doOutput opt_ProduceC c_output_w `thenMn_`
307 -------------------------------------------------------------
308 -- ****** printing styles and column width:
310 pprCols = (80 :: Int) -- could make configurable
312 (pprStyle, pprErrorsStyle)
313 = if opt_PprStyle_All then
314 (PprShowAll, PprShowAll)
315 else if opt_PprStyle_Debug then
317 else if opt_PprStyle_User then
318 (PprForUser, PprForUser)
320 (PprDebug, PprForUser)
322 pp_show p = ppShow {-WAS:pprCols-}10000{-random-} p
324 -------------------------------------------------------------
325 -- ****** help functions:
328 = if opt_D_show_passes
329 then \ what -> writeMn stderr ("*** "++what++":\n")
330 else \ what -> returnMn ()
332 doOutput switch io_action
334 Nothing -> returnMn ()
336 fopen fname "a+" `thenPrimIO` \ file ->
337 if (file == ``NULL'') then
338 error ("doOutput: failed to open:"++fname)
340 io_action file `thenMn` \ () ->
341 fclose file `thenPrimIO` \ status ->
344 else error ("doOutput: closed failed: "{-++show status++" "-}++fname)
346 doDump switch hdr string
348 then writeMn stderr hdr `thenMn_`
349 writeMn stderr ('\n': string) `thenMn_`
354 ppSourceStats (HsModule name version exports imports fixities typedecls typesigs
355 classdecls instdecls instsigs defdecls binds
356 [{-no sigs-}] src_loc)
357 = ppAboves (map pp_val
358 [("ExportAll ", export_all), -- 1 if no export list
359 ("ExportDecls ", export_ds),
360 ("ExportModules ", export_ms),
361 ("Imports ", import_no),
362 (" ImpQual ", import_qual),
363 (" ImpAs ", import_as),
364 (" ImpAll ", import_all),
365 (" ImpPartial ", import_partial),
366 (" ImpHiding ", import_hiding),
367 ("FixityDecls ", fixity_ds),
368 ("DefaultDecls ", defalut_ds),
369 ("TypeDecls ", type_ds),
370 ("DataDecls ", data_ds),
371 ("NewTypeDecls ", newt_ds),
372 ("DataConstrs ", data_constrs),
373 ("DataDerivings ", data_derivs),
374 ("ClassDecls ", class_ds),
375 ("ClassMethods ", class_method_ds),
376 ("DefaultMethods ", default_method_ds),
377 ("InstDecls ", inst_ds),
378 ("InstMethods ", inst_method_ds),
379 ("TypeSigs ", bind_tys),
380 ("ValBinds ", val_bind_ds),
381 ("FunBinds ", fn_bind_ds),
382 ("InlineMeths ", method_inlines),
383 ("InlineBinds ", bind_inlines),
384 ("SpecialisedData ", data_specs),
385 ("SpecialisedInsts ", inst_specs),
386 ("SpecialisedMeths ", method_specs),
387 ("SpecialisedBinds ", bind_specs)
390 pp_val (str, 0) = ppNil
391 pp_val (str, n) = ppBesides [ppStr str, ppInt n]
393 (export_decls, export_mods) = getRawExportees exports
394 type_decls = filter is_type_decl typedecls
395 data_decls = filter is_data_decl typedecls
396 newt_decls = filter is_newt_decl typedecls
398 export_ds = length export_decls
399 export_ms = length export_mods
400 export_all = if export_ds == 0 && export_ms == 0 then 1 else 0
402 fixity_ds = length fixities
403 defalut_ds = length defdecls
404 type_ds = length type_decls
405 data_ds = length data_decls
406 newt_ds = length newt_decls
407 class_ds = length classdecls
408 inst_ds = length instdecls
410 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
413 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
414 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
415 (data_constrs, data_derivs)
416 = foldr add2 (0,0) (map data_info (newt_decls ++ data_decls))
417 (class_method_ds, default_method_ds)
418 = foldr add2 (0,0) (map class_info classdecls)
419 (inst_method_ds, method_specs, method_inlines)
420 = foldr add3 (0,0,0) (map inst_info instdecls)
422 data_specs = length typesigs
423 inst_specs = length instsigs
425 count_binds EmptyBinds = (0,0,0,0,0)
426 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
427 count_binds (SingleBind b) = case count_bind b of
428 (vs,fs) -> (vs,fs,0,0,0)
429 count_binds (BindWith b sigs) = case (count_bind b, count_sigs sigs) of
430 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
432 count_bind EmptyBind = (0,0)
433 count_bind (NonRecBind b) = count_monobinds b
434 count_bind (RecBind b) = count_monobinds b
436 count_monobinds EmptyMonoBinds = (0,0)
437 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
438 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
439 count_monobinds (PatMonoBind p r _) = (0,1)
440 count_monobinds (FunMonoBind f _ m _) = (0,1)
442 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
444 sig_info (Sig _ _ _ _) = (1,0,0,0)
445 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
446 sig_info (SpecSig _ _ _ _) = (0,0,1,0)
447 sig_info (InlineSig _ _) = (0,0,0,1)
448 sig_info _ = (0,0,0,0)
450 import_info (ImportDecl _ qual as spec _)
451 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
456 spec_info Nothing = (0,0,0,1,0,0)
457 spec_info (Just (False, _)) = (0,0,0,0,1,0)
458 spec_info (Just (True, _)) = (0,0,0,0,0,1)
460 data_info (TyData _ _ _ constrs derivs _ _)
461 = (length constrs, case derivs of {Nothing -> 0; Just ds -> length ds})
462 data_info (TyNew _ _ _ constr derivs _ _)
463 = (length constr, case derivs of {Nothing -> 0; Just ds -> length ds})
465 class_info (ClassDecl _ _ _ meth_sigs def_meths _ _)
466 = case count_sigs meth_sigs of
468 (classops, addpr (count_monobinds def_meths))
470 inst_info (InstDecl _ _ inst_meths _ _ inst_sigs _ _)
471 = case count_sigs inst_sigs of
473 (addpr (count_monobinds inst_meths), ss, is)
475 is_type_decl (TySynonym _ _ _ _) = True
476 is_type_decl _ = False
477 is_data_decl (TyData _ _ _ _ _ _ _) = True
478 is_data_decl _ = False
479 is_newt_decl (TyNew _ _ _ _ _ _ _) = True
480 is_newt_decl _ = False
484 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
485 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
486 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
487 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
488 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)