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, pprStgBindings )
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, doIfSet, dumpIfSet )
44 import Maybes ( maybeToBool, MaybeErr(..) )
45 import Specialise ( SpecialiseData(..) )
46 import StgSyn ( GenStgBinding )
47 import TcInstUtil ( InstInfo )
48 import TyCon ( isDataTyCon )
49 import UniqSupply ( mkSplitUniqSupply )
51 import PprAbsC ( dumpRealC, writeRealC )
52 import PprCore ( pprCoreBinding )
55 import Id ( GenId ) -- instances
56 import Name ( Name ) -- instances
57 import PprType ( GenType, GenTyVar ) -- instances
58 import TyVar ( GenTyVar ) -- instances
59 import Unique ( Unique ) -- instances
61 import Outputable ( PprStyle(..), Outputable(..), pprDumpStyle, pprErrorsStyle )
68 hGetContents stdin >>= \ input_pgm ->
70 cmd_line_info = classifyOpts
72 doIt cmd_line_info input_pgm
76 doIt :: ([CoreToDo], [StgToDo]) -> String -> IO ()
78 doIt (core_cmds, stg_cmds) input_pgm
80 (hPutStr stderr ("Glasgow Haskell Compiler, version " ++
81 show PROJECTVERSION ++
82 ", for Haskell 1.4\n")) >>
87 rdModule >>= \ (mod_name, rdr_module) ->
89 dumpIfSet opt_D_dump_rdr "Reader"
90 (ppr pprDumpStyle rdr_module) >>
92 dumpIfSet opt_D_source_stats "Source Statistics"
93 (ppSourceStats rdr_module) >>
95 -- UniqueSupplies for later use (these are the only lower case uniques)
97 mkSplitUniqSupply 'r' >>= \ rn_uniqs -> -- renamer
99 mkSplitUniqSupply 'a' >>= \ tc_uniqs -> -- typechecker
101 mkSplitUniqSupply 'd' >>= \ ds_uniqs -> -- desugarer
103 mkSplitUniqSupply 's' >>= \ sm_uniqs -> -- core-to-core simplifier
105 mkSplitUniqSupply 'c' >>= \ c2s_uniqs -> -- core-to-stg
107 mkSplitUniqSupply 'g' >>= \ st_uniqs -> -- stg-to-stg passes
109 mkSplitUniqSupply 'f' >>= \ fl_uniqs -> -- absC flattener
111 mkSplitUniqSupply 'n' >>= \ ncg_uniqs -> -- native-code generator
114 show_pass "Renamer" >>
117 renameModule rn_uniqs rdr_module >>=
119 case maybe_rn_stuff of {
120 Nothing -> -- Hurrah! Renamer reckons that there's no need to
124 Just (rn_mod, iface_file_stuff, rn_name_supply, imported_modules) ->
125 -- Oh well, we've got to recompile for real
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 typecheckModule tc_uniqs rn_name_supply rn_mod >>= \ maybe_tc_stuff ->
140 case maybe_tc_stuff of {
141 Nothing -> ghcExit 1; -- Type checker failed
144 local_tycons, local_classes, inst_info, pragma_tycon_specs,
149 show_pass "DeSugar" >>
151 deSugar ds_uniqs mod_name all_binds >>= \ desugared ->
154 -- ******* CORE-TO-CORE SIMPLIFICATION
155 show_pass "Core2Core" >>
158 local_data_tycons = filter isDataTyCon local_tycons
160 core2core core_cmds mod_name
161 sm_uniqs local_data_tycons pragma_tycon_specs desugared
164 SpecData _ _ _ gen_data_tycons all_tycon_specs _ _ _) ->
167 -- ******* STG-TO-STG SIMPLIFICATION
168 show_pass "Core2Stg" >>
171 stg_binds = topCoreBindsToStg c2s_uniqs simplified
174 show_pass "Stg2Stg" >>
176 stg2stg stg_cmds mod_name st_uniqs stg_binds
178 \ (stg_binds2, cost_centre_info) ->
180 dumpIfSet opt_D_dump_stg "STG syntax:"
181 (pprStgBindings pprDumpStyle stg_binds2)
184 -- Dump instance decls and type signatures into the interface file
186 final_ids = collectFinalStgBinders stg_binds2
189 ifaceDecls if_handle local_tycons local_classes inst_info final_ids simplified >>
190 endIface if_handle >>
191 -- We are definitely done w/ interface-file stuff at this point:
192 -- (See comments near call to "startIface".)
195 -- ******* "ABSTRACT", THEN "FLAT", THEN *REAL* C!
196 show_pass "CodeGen" >>
199 abstractC = codeGen mod_name -- module name for CC labelling
201 imported_modules -- import names for CC registering
202 gen_data_tycons -- type constructors generated locally
203 all_tycon_specs -- tycon specialisations
206 flat_abstractC = flattenAbsC fl_uniqs abstractC
208 dumpIfSet opt_D_dump_absC "Abstract C"
209 (dumpRealC abstractC) >>
211 dumpIfSet opt_D_dump_flatC "Flat Abstract C"
212 (dumpRealC flat_abstractC) >>
214 show_pass "CodeOutput" >>
216 -- You can have C (c_output) or assembly-language (ncg_output),
217 -- but not both. [Allowing for both gives a space leak on
218 -- flat_abstractC. WDP 94/10]
220 (flat_absC_c, flat_absC_ncg) =
221 case (maybeToBool opt_ProduceC || opt_D_dump_realC,
222 maybeToBool opt_ProduceS || opt_D_dump_asm) of
223 (True, False) -> (flat_abstractC, absCNop)
224 (False, True) -> (absCNop, flat_abstractC)
225 (False, False) -> (absCNop, absCNop)
226 (True, True) -> error "ERROR: Can't do both .hc and .s at the same time"
228 c_output_d = dumpRealC flat_absC_c
229 c_output_w = (\ f -> writeRealC f flat_absC_c)
231 #if OMIT_NATIVE_CODEGEN
232 ncg_output_d = error "*** GHC not built with a native-code generator ***"
233 ncg_output_w = ncg_output_d
235 ncg_output_d = dumpRealAsm flat_absC_ncg ncg_uniqs
236 ncg_output_w = (\ f -> writeRealAsm f flat_absC_ncg ncg_uniqs)
240 dumpIfSet opt_D_dump_asm "Asm code" ncg_output_d >>
241 doOutput opt_ProduceS ncg_output_w >>
243 dumpIfSet opt_D_dump_realC "Real C" c_output_d >>
244 doOutput opt_ProduceC c_output_w >>
249 -------------------------------------------------------------
250 -- ****** help functions:
253 = if opt_D_show_passes
254 then \ what -> hPutStr stderr ("*** "++what++":\n")
255 else \ what -> return ()
257 doOutput switch io_action
261 openFile fname WriteMode >>= \ handle ->
266 ppSourceStats (HsModule name version exports imports fixities decls src_loc)
268 [("ExportAll ", export_all), -- 1 if no export list
269 ("ExportDecls ", export_ds),
270 ("ExportModules ", export_ms),
271 ("Imports ", import_no),
272 (" ImpQual ", import_qual),
273 (" ImpAs ", import_as),
274 (" ImpAll ", import_all),
275 (" ImpPartial ", import_partial),
276 (" ImpHiding ", import_hiding),
277 ("FixityDecls ", fixity_ds),
278 ("DefaultDecls ", default_ds),
279 ("TypeDecls ", type_ds),
280 ("DataDecls ", data_ds),
281 ("NewTypeDecls ", newt_ds),
282 ("DataConstrs ", data_constrs),
283 ("DataDerivings ", data_derivs),
284 ("ClassDecls ", class_ds),
285 ("ClassMethods ", class_method_ds),
286 ("DefaultMethods ", default_method_ds),
287 ("InstDecls ", inst_ds),
288 ("InstMethods ", inst_method_ds),
289 ("TypeSigs ", bind_tys),
290 ("ValBinds ", val_bind_ds),
291 ("FunBinds ", fn_bind_ds),
292 ("InlineMeths ", method_inlines),
293 ("InlineBinds ", bind_inlines),
294 -- ("SpecialisedData ", data_specs),
295 -- ("SpecialisedInsts ", inst_specs),
296 ("SpecialisedMeths ", method_specs),
297 ("SpecialisedBinds ", bind_specs)
300 pp_val (str, 0) = empty
301 pp_val (str, n) = hcat [text str, int n]
303 fixity_ds = length fixities
304 type_decls = [d | TyD d@(TySynonym _ _ _ _) <- decls]
305 data_decls = [d | TyD d@(TyData DataType _ _ _ _ _ _ _) <- decls]
306 newt_decls = [d | TyD d@(TyData NewType _ _ _ _ _ _ _) <- decls]
307 type_ds = length type_decls
308 data_ds = length data_decls
309 newt_ds = length newt_decls
310 class_decls = [d | ClD d <- decls]
311 class_ds = length class_decls
312 inst_decls = [d | InstD d <- decls]
313 inst_ds = length inst_decls
314 default_ds = length [() | DefD _ <- decls]
315 val_decls = [d | ValD d <- decls]
317 real_exports = case exports of { Nothing -> []; Just es -> es }
318 n_exports = length real_exports
319 export_ms = length [() | IEModuleContents _ <- real_exports]
320 export_ds = n_exports - export_ms
321 export_all = case exports of { Nothing -> 1; other -> 0 }
323 (val_bind_ds, fn_bind_ds, bind_tys, bind_specs, bind_inlines)
324 = count_binds (foldr ThenBinds EmptyBinds val_decls)
326 (import_no, import_qual, import_as, import_all, import_partial, import_hiding)
327 = foldr add6 (0,0,0,0,0,0) (map import_info imports)
328 (data_constrs, data_derivs)
329 = foldr add2 (0,0) (map data_info (newt_decls ++ data_decls))
330 (class_method_ds, default_method_ds)
331 = foldr add2 (0,0) (map class_info class_decls)
332 (inst_method_ds, method_specs, method_inlines)
333 = foldr add3 (0,0,0) (map inst_info inst_decls)
336 count_binds EmptyBinds = (0,0,0,0,0)
337 count_binds (ThenBinds b1 b2) = count_binds b1 `add5` count_binds b2
338 count_binds (MonoBind b sigs _) = case (count_monobinds b, count_sigs sigs) of
339 ((vs,fs),(ts,_,ss,is)) -> (vs,fs,ts,ss,is)
341 count_monobinds EmptyMonoBinds = (0,0)
342 count_monobinds (AndMonoBinds b1 b2) = count_monobinds b1 `add2` count_monobinds b2
343 count_monobinds (PatMonoBind (VarPatIn n) r _) = (1,0)
344 count_monobinds (PatMonoBind p r _) = (0,1)
345 count_monobinds (FunMonoBind f _ m _) = (0,1)
347 count_sigs sigs = foldr add4 (0,0,0,0) (map sig_info sigs)
349 sig_info (Sig _ _ _) = (1,0,0,0)
350 sig_info (ClassOpSig _ _ _ _) = (0,1,0,0)
351 sig_info (SpecSig _ _ _ _) = (0,0,1,0)
352 sig_info (InlineSig _ _) = (0,0,0,1)
353 sig_info _ = (0,0,0,0)
355 import_info (ImportDecl _ qual _ as spec _)
356 = add6 (1, qual_info qual, as_info as, 0,0,0) (spec_info spec)
361 spec_info Nothing = (0,0,0,1,0,0)
362 spec_info (Just (False, _)) = (0,0,0,0,1,0)
363 spec_info (Just (True, _)) = (0,0,0,0,0,1)
365 data_info (TyData _ _ _ _ constrs derivs _ _)
366 = (length constrs, case derivs of {Nothing -> 0; Just ds -> length ds})
368 class_info (ClassDecl _ _ _ meth_sigs def_meths _ _)
369 = case count_sigs meth_sigs of
371 (classops, addpr (count_monobinds def_meths))
373 inst_info (InstDecl _ inst_meths inst_sigs _ _)
374 = case count_sigs inst_sigs of
376 (addpr (count_monobinds inst_meths), ss, is)
380 add2 (x1,x2) (y1,y2) = (x1+y1,x2+y2)
381 add3 (x1,x2,x3) (y1,y2,y3) = (x1+y1,x2+y2,x3+y3)
382 add4 (x1,x2,x3,x4) (y1,y2,y3,y4) = (x1+y1,x2+y2,x3+y3,x4+y4)
383 add5 (x1,x2,x3,x4,x5) (y1,y2,y3,y4,y5) = (x1+y1,x2+y2,x3+y3,x4+y4,x5+y5)
384 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)