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AD		 1#! /usr/bin/perl -w
2
3# Copyright (C) 2006 Free Software Foundation, Inc.
4#
5# This file is part of Bison, the GNU Compiler Compiler.
6#
7# Bison is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2, or (at your option)
10# any later version.
11#
12# Bison is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
16#
17# You should have received a copy of the GNU General Public License
18# along with autoconf; see the file COPYING. If not, write to
19# the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20# Boston, MA 02110-1301, USA.
21
22use IO::File;
23use Benchmark qw (:all);
24
25my $bison = $ENV{'BISON'} || 'bison';
26my $cc = $ENV{'CC'} || 'gcc';
27
28##################################################################
29
30sub triangular_grammar ($$$)
31{
32 my ($base, $max, $directives) = @_;
33
34 my $out = new IO::File ">$base.y"
35 or die;
36 print $out <<EOF;
37%error-verbose
38%debug
39%{
40#include <stdio.h>
41#include <stdlib.h>
42
43static int yylex (void);
44static void yyerror (const char *msg);
45%}
46%union
47{
48 int val;
49};
50
51%token END "end"
52%type <val> exp input
53EOF
54
55 for my $size (1 .. $max)
56 {
57 print $out "%token t$size $size \"$size\"\n";
58 };
59
60print $out <<EOF;
61%%
62input:
63 exp { if (\$1 != 0) abort (); \$\$ = \$1; }
64| input exp { if (\$2 != \$1 + 1) abort (); \$\$ = \$2; }
65;
66
67exp:
68 END
69 { \$\$ = 0; }
70EOF
71
72for my $size (1 .. $max)
73 {
74 use Text::Wrap;
75 print $out wrap ("| ", " ",
76 (map { "\"$_\"" } (1 .. $size)),
77 " END \n"),
78 " { \$\$ = $size; }\n";
79 };
80print $out ";\n";
81
82print $out <<EOF;
83%%
84static int
85yylex (void)
86{
87 static int inner = 1;
88 static int outer = 0;
89 if (outer > $max)
90 return 0;
91 else if (inner > outer)
92 {
93 inner = 1;
94 ++outer;
95 return END;
96 }
97 return inner++;
98}
99
100static void
101yyerror (const char *msg)
102{
103 fprintf (stderr, "%s\\n", msg);
104}
105
106int
107main (void)
108{
109 yydebug = !!getenv ("YYDEBUG");
110 return yyparse ();
111}
112EOF
113}
114
115##################################################################
116
117sub calc_input ($$)
118{
119 my ($base, $max) = @_;
120 my $out = new IO::File ">$base.input"
121 or die;
122 foreach (1 .. $max)
123 {
124 print $out "0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+55+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+85+86+87+88+89+90+91+92+93+94+95+96+97+98+99\n";
125 print $out "1+1*(2+2*(3+3*(4+4*(5+5*(6+6*(7+7*(8+8*(9+9*(10+10*(11+11*(12+12*(13+13*(14+14*(15+15*(16+16*(17+17*(18+18*(19+19*(20+20*(21+21*(22+22*(23+23*(24+24*(25+25*(26+26*(27+27*(28+28*(29+29*(30+30*(31+31*(32+32*(33+33*(34+34*(35+35*(36+36*(37+37*(38+38*(39+39*(40+40*(41+41*(42+42*(43+43*(44+44*(45+45*(46+46*(47+47*(48+48*(49+49*(50+50*(51+51*(52+52*(53+53*(54+54*(55+55*(56+56*(57+57*(58+58*(59+59*(60+60*(61+61*(62+62*(63+63*(64+64*(65+65*(66+66*(67+67*(68+68*(69+69*(70+70*(71+71*(72+72*(73+73*(74+74*(75+75*(76+76*(77+77*(78+78*(79+79*(80+80*(81+81*(82+82*(83+83*(84+84*(85+85*(86+86*(87+87*(88+88*(89+89*(90+90*(91+91*(92+92*(93+93*(94+94*(95+95*(96+96*(97+97*(98+98*(99+99*(100+100*(101+101*(102+102*(103+103*(104+104*(105+105*(106+106*(107+107*(108+108*(109+109*(110+110*(111+111*(112+112*(113+113*(114+114*(115+115*(116+116*(117+117*(118+118*(119+119*(120+120*(121+121*(122+122*(123+123*(124+124*(125+125*(126+126*(127+127*(128+128*(129+129*(130+130*(131+131*(132+132*(133+133*(134+134*(135+135*(136+136*(137+137*(138+138*(139+139*(140+140*(141+141*(142+142*(143+143*(144+144*(145+145*(146+146*(147+147*(148+148*(149+149*(150+150*(151+151*(152+152*(153+153*(154+154*(155+155*(156+156*(157+157*(158+158*(159+159*(160+160*(161+161*(162+162*(163+163*(164+164*(165+165*(166+166*(167+167*(168+168*(169+169*(170+170*(171+171*(172+172*(173+173*(174+174*(175+175*(176+176*(177+177*(178+178*(179+179*(180+180*(181+181*(182+182*(183+183*(184+184*(185+185*(186+186*(187+187*(188+188*(189+189*(190+190*(191+191*(192+192*(193+193*(194+194*(195+195*(196+196*(197+197*(198+198*(199+199*(200+200*(201+201*(202+202*(203+203*(204+204*(205+205*(206+206*(207+207*(208+208*(209+209*(210+210*(211+211*(212+212*(213+213*(214+214*(215+215*(216+216*(217+217*(218+218*(219+219*(220+220*(221+221*(222+222*(223+223*(224+224*(225+225*(226+226*(227+227*(228+228*(229+229*(230+230*(231+231*(232+232*(233+233*(234+234*(235+235*(236+236*(237+237*(238+238*(239+239*(240+240*(241+241*(242+242*(243+243*(244+244*(245+245*(246+246*(247+247*(248+248*(249+249*(250+250*(251+251*(252+252*(253+253*(254+254*(255+255*(256+256*(257+257*(258+258*(259+259*(260+260*(261+261*(262+262*(263+263*(264+264*(265+265*(266+266*(267+267*(268+268*(269+269*(270+270*(271+271*(272+272*(273+273*(274+274*(275+275*(276+276*(277+277*(278+278*(279+279*(280+280*(281+281*(282+282*(283+283*(284+284*(285+285*(286+286*(287+287*(288+288*(289+289*(290+290*(291+291*(292+292*(293+293*(294+294*(295+295*(296+296*(297+297*(298+298*(299+299*(300+300*(301+301*(302+302*(303+303*(304+304*(305+305*(306+306*(307+307*(308+308*(309+309*(310+310*(311+311*(312+312*(313+313*(314+314*(315+315*(316+316*(317+317*(318+318*(319+319*(320+320*(321+321*(322+322*(323+323*(324+324*(325+325*(326+326*(327+327*(328+328*(329+329*(330+330*(331+331*(332+332*(333+333*(334+334*(335+335*(336+336*(337+337*(338+338*(339+339*(340+340*(341+341*(342+342*(343+343*(344+344*(345+345*(346+346*(347+347*(348+348*(349+349*(350+350*(351+351*(352+352*(353+353*(354+354*(355+355*(356+356*(357+357*(358+358*(359+359*(360+360*(361+361*(362+362*(363+363*(364+364*(365+365*(366+366*(367+367*(368+368*(369+369*(370+370*(371+371*(372+372*(373+373*(374+374*(375+375*(376+376*(377+377*(378+378*(379+379*(380+380*(381+381*(382+382*(383+383*(384+384*(385+385*(386+386*(387+387*(388+388*(389+389*(390+390*(391+391*(392+392*(393+393*(394+394*(395+395*(396+396*(397+397*(398+398*(399+399*(400+400*(401+401*(402+402*(403+403*(404+404*(405+405*(406+406*(407+407*(408+408*(409+409*(410+410*(411+411*(412+412*(413+413*(414+414*(415+415*(416+416*(417+417*(418+418*(419+419*(420+420*(421+421*(422+422*(423+423*(424+424*(425+425*(426+426*(427+427*(428+428*(429+429*(430+430*(431+431*(432+432*(433+433*(434+434*(435+435*(436+436*(437+437*(438+438*(439+439*(440+440*(441+441*(442+442*(443+443*(444+444*(445+445*(446+446*(447+447*(448+448*(449+449*(450+450*(451+451*(452+452*(453+453*(454+454*(455+455*(456+456*(457+457*(458+458*(459+459*(460+460*(461+461*(462+462*(463+463*(464+464*(465+465*(466+466*(467+467*(468+468*(469+469*(470+470*(471+471*(472+472*(473+473*(474+474*(475+475*(476+476*(477+477*(478+478*(479+479*(480+480*(481+481*(482+482*(483+483*(484+484*(485+485*(486+486*(487+487*(488+488*(489+489*(490+490*(491+491*(492+492*(493+493*(494+494*(495+495*(496+496*(497+497*(498+498*(499+499*(500+500*(501+501*(502+502*(503+503*(504+504*(505+505*(506+506*(507+507*(508+508*(509+509*(510+510*(511+511*(512+512*(513+513*(514+514*(515+515*(516+516*(517+517*(518+518*(519+519*(520+520*(521+521*(522+522*(523+523*(524+524*(525+525*(526+526*(527+527*(528+528*(529+529*(530+530*(531+531*(532+532*(533+533*(534+534*(535+535*(536+536*(537+537*(538+538*(539+539*(540+540*(541+541*(542+542*(543+543*(544+544*(545+545*(546+546*(547+547*(548+548*(549+549*(550+550*(551+551*(552+552*(553+553*(554+554*(555+555*(556+556*(557+557*(558+558*(559+559*(560+560*(561+561*(562+562*(563+563*(564+564*(565+565*(566+566*(567+567*(568+568*(569+569*(570+570*(571+571*(572+572*(573+573*(574+574*(575+575*(576+576*(577+577*(578+578*(579+579*(580+580*(581+581*(582+582*(583+583*(584+584*(585+585*(586+586*(587+587*(588+588*(589+589*(590+590*(591+591*(592+592*(593+593*(594+594*(595+595*(596+596*(597+597*(598+598*(599+599*(600+600*(601+601*(602+602*(603+603*(604+604*(605+605*(606+606*(607+607*(608+608*(609+609*(610+610*(611+611*(612+612*(613+613*(614+614*(615+615*(616+616*(617+617*(618+618*(619+619*(620+620*(621+621*(622+622*(623+623*(624+624*(625+625*(626+626*(627+627*(628+628*(629+629*(630+630*(631+631*(632+632*(633+633*(634+634*(635+635*(636+636*(637+637*(638+638*(639+639*(640+640*(641+641*(642+642*(643+643*(644+644*(645+645*(646+646*(647+647*(648+648*(649+649*(650+650*(651+651*(652+652*(653+653*(654+654*(655+655*(656+656*(657+657*(658+658*(659+659*(660+660*(661+661*(662+662*(663+663*(664+664*(665+665*(666+666*(667+667*(668+668*(669+669*(670+670*(671+671*(672+672*(673+673*(674+674*(675+675*(676+676*(677+677*(678+678*(679+679*(680+680*(681+681*(682+682*(683+683*(684+684*(685+685*(686+686*(687+687*(688+688*(689+689*(690+690*(691+691*(692+692*(693+693*(694+694*(695+695*(696+696*(697+697*(698+698*(699+699*(700+700*(701+701*(702+702*(703+703*(704+704*(705+705*(706+706*(707+707*(708+708*(709+709*(710+710*(711+711*(712+712*(713+713*(714+714*(715+715*(716+716*(717+717*(718+718*(719+719*(720+720*(721+721*(722+722*(723+723*(724+724*(725+725*(726+726*(727+727*(728+728*(729+729*(730+730*(731+731*(732+732*(733+733*(734+734*(735+735*(736+736*(737+737*(738+738*(739+739*(740+740*(741+741*(742+742*(743+743*(744+744*(745+745*(746+746*(747+747*(748+748*(749+749*(750+750*(751+751*(752+752*(753+753*(754+754*(755+755*(756+756*(757+757*(758+758*(759+759*(760+760*(761+761*(762+762*(763+763*(764+764*(765+765*(766+766*(767+767*(768+768*(769+769*(770+770*(771+771*(772+772*(773+773*(774+774*(775+775*(776+776*(777+777*(778+778*(779+779*(780+780*(781+781*(782+782*(783+783*(784+784*(785+785*(786+786*(787+787*(788+788*(789+789*(790+790*(791+791*(792+792*(793+793*(794+794*(795+795*(796+796*(797+797*(798+798*(799+799*(800+800*(801+801*(802+802*(803+803*(804+804*(805+805*(806+806*(807+807*(808+808*(809+809*(810+810*(811+811*(812+812*(813+813*(814+814*(815+815*(816+816*(817+817*(818+818*(819+819*(820+820*(821+821*(822+822*(823+823*(824+824*(825+825*(826+826*(827+827*(828+828*(829+829*(830+830*(831+831*(832+832*(833+833*(834+834*(835+835*(836+836*(837+837*(838+838*(839+839*(840+840*(841+841*(842+842*(843+843*(844+844*(845+845*(846+846*(847+847*(848+848*(849+849*(850+850*(851+851*(852+852*(853+853*(854+854*(855+855*(856+856*(857+857*(858+858*(859+859*(860+860*(861+861*(862+862*(863+863*(864+864*(865+865*(866+866*(867+867*(868+868*(869+869*(870+870*(871+871*(872+872*(873+873*(874+874*(875+875*(876+876*(877+877*(878+878*(879+879*(880+880*(881+881*(882+882*(883+883*(884+884*(885+885*(886+886*(887+887*(888+888*(889+889*(890+890*(891+891*(892+892*(893+893*(894+894*(895+895*(896+896*(897+897*(898+898*(899+899*(900+900*(901+901*(902+902*(903+903*(904+904*(905+905*(906+906*(907+907*(908+908*(909+909*(910+910*(911+911*(912+912*(913+913*(914+914*(915+915*(916+916*(917+917*(918+918*(919+919*(920+920*(921+921*(922+922*(923+923*(924+924*(925+925*(926+926*(927+927*(928+928*(929+929*(930+930*(931+931*(932+932*(933+933*(934+934*(935+935*(936+936*(937+937*(938+938*(939+939*(940+940*(941+941*(942+942*(943+943*(944+944*(945+945*(946+946*(947+947*(948+948*(949+949*(950+950*(951+951*(952+952*(953+953*(954+954*(955+955*(956+956*(957+957*(958+958*(959+959*(960+960*(961+961*(962+962*(963+963*(964+964*(965+965*(966+966*(967+967*(968+968*(969+969*(970+970*(971+971*(972+972*(973+973*(974+974*(975+975*(976+976*(977+977*(978+978*(979+979*(980+980*(981+981*(982+982*(983+983*(984+984*(985+985*(986+986*(987+987*(988+988*(989+989*(990+990*(991+991*(992+992*(993+993*(994+994*(995+995*(996+996*(997+997*(998+998*(999+999*(1000+1000*(1001))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))\n";
126 }
127}
128
129##################################################################
130
131sub calc_grammar ($$$)
132{
133 my ($base, $max, $directives) = @_;
134
135 my $out = new IO::File ">$base.y"
136 or die;
137 print $out <<EOF;
138%{
139#include <stdio.h>
140
141#include <stdlib.h>
142#include <string.h>
143#include <ctype.h>
144#define USE(Var)
145
146/* Exercise pre-prologue dependency to %union. */
147typedef int semantic_value;
148
149static semantic_value global_result = 0;
150static int global_count = 0;
151%}
152
153/* Exercise %union. */
154$directives
155%error-verbose
156%union
157{
158 semantic_value ival;
159};
160
161%{
162static int power (int base, int exponent);
163/* yyerror receives the location if:
164 - %location & %pure & %glr
165 - %location & %pure & %yacc & %parse-param. */
166static void yyerror (const char *s);
167#if YYPURE
168static int yylex (YYSTYPE* yylvalp);
169#else
170static int yylex (void);
171#endif
172%}
173
174/* Bison Declarations */
175%token CALC_EOF 0 "end of input"
176%token <ival> NUM "number"
177%type <ival> exp
178
179%nonassoc '=' /* comparison */
180%left '-' '+'
181%left '*' '/'
182%left NEG /* negation--unary minus */
183%right '^' /* exponentiation */
184
185/* Grammar follows */
186%%
187input:
188 line
189| input line
190;
191
192line:
193 '\\n'
194| exp '\\n' { USE (\$1); }
195;
196
197exp:
198 NUM { \$\$ = \$1; }
199| exp '=' exp
200 {
201 if (\$1 != \$3)
202 fprintf (stderr, "calc: error: %d != %d\\n", \$1, \$3);
203 \$\$ = \$1;
204 }
205| exp '+' exp { \$\$ = \$1 + \$3; }
206| exp '-' exp { \$\$ = \$1 - \$3; }
207| exp '*' exp { \$\$ = \$1 * \$3; }
208| exp '/' exp { \$\$ = \$1 / \$3; }
209| '-' exp %prec NEG { \$\$ = -\$2; }
210| exp '^' exp { \$\$ = power (\$1, \$3); }
211| '(' exp ')' { \$\$ = \$2; }
212| '(' error ')' { \$\$ = 1111; }
213| '!' { \$\$ = 0; YYERROR; }
214| '-' error { \$\$ = 0; YYERROR; }
215;
216%%
217/* The input. */
218static FILE *input;
219
220static void
221yyerror (const char *s)
222{
223 fprintf (stderr, "%s\\n", s);
224}
225
226static int
227get_char (void)
228{
229 return getc (input);
230}
231
232
233static void
234unget_char ( int c)
235{
236 ungetc (c, input);
237}
238
239static int
240read_signed_integer (void)
241{
242 int c = get_char ();
243 int sign = 1;
244 int n = 0;
245
246 if (c == '-')
247 {
248 c = get_char ();
249 sign = -1;
250 }
251
252 while (isdigit (c))
253 {
254 n = 10 * n + (c - '0');
255 c = get_char ();
256 }
257
258 unget_char (c);
259
260 return sign * n;
261}
262
263#if YYPUSH
264#ifndef HAVE_YYSTYPE
265static YYSTYPE yylval;
266#endif
267#endif
268
269static int
270#if YYPURE
271# define yylval (*yylvalp)
272yylex (YYSTYPE* yylvalp)
273#else
274yylex (void)
275#endif
276{
277 int c;
278
279 /* Skip white space. */
280 while ((c = get_char ()) == ' ' || c == '\t')
281 {
282
283 }
284
285 /* process numbers */
286 if (c == '.' || isdigit (c))
287 {
288 unget_char ( c);
289 yylval.ival = read_signed_integer ();
290 return NUM;
291 }
292
293 /* Return end-of-file. */
294 if (c == EOF)
295 return CALC_EOF;
296
297 /* Return single chars. */
298 return c;
299}
300
301static int
302power (int base, int exponent)
303{
304 int res = 1;
305 if (exponent < 0)
306 exit (3);
307 for (/* Niente */; exponent; --exponent)
308 res *= base;
309 return res;
310}
311
312
313#if YYPUSH
314static int
315yyparse_wrapper ()
316{
317 struct yypvars *ctx = yypvarsinit ();
318 do {
319 set_yychar (ctx, yylex ());
320 ctx->yylval = yylval;
321 yyparse (ctx);
322 } while (get_yyresult (ctx) != 0);
323 free (ctx);
324}
325#define yyparse yyparse_wrapper
326#endif
327
328int
329main (int argc, const char **argv)
330{
331 semantic_value result = 0;
332 int count = 0;
333 int status;
334
335 input = fopen ("calc.input", "r");
336 if (!input)
337 {
338 perror ("calc.input");
339 return 3;
340 }
341
342 status = yyparse ();
343 if (global_result != result)
344 abort ();
345 if (global_count != count)
346 abort ();
347
348 return status;
349}
350EOF
351}
352
353##################################################################
354
355sub compile ($)
356{
357 my ($base) = @_;
358 system ("$bison $base.y -o $base.c") == 0
359 or die;
360 system ("$cc -o $base $base.c") == 0
361 or die;
362}
363
364sub bench_grammar ($)
365{
366 my ($gram) = @_;
367 my %test =
368 (
369 "yacc-yacc" => '',
370 "yacc-pure" => '%pure-parser',
371 "push-yacc" => '%skeleton "push.c"',
372 "push-pure" => '%skeleton "push.c" %pure-parser',
373 "push-push" => '%skeleton "push.c" %push-parser',
374 "push-opt-yacc" => '%skeleton "push_opt.c"',
375 "push-opt-pure" => '%skeleton "push_opt.c" %pure-parser',
376 "push-opt-push" => '%skeleton "push_opt.c" %push-parser',
377 );
378
379 my %bench;
380 while (my ($name, $directives) = each %test)
381 {
382 print STDERR "$name\n";
383 my $generator = "$gram" . "_grammar";
384 &$generator ($name, 200, $directives);
385 compile ($name);
386 $bench{$name} = "system ('./$name');";
387 }
388
389 print "$gram:\n";
390 my $res = timethese (50, \%bench, 'nop');
391 cmpthese ($res, 'nop');
392}
393
394print STDERR "Using $bison, $cc.\n";
395calc_input ('calc', 200);
396bench_grammar ('calc');
397
398### Setup "GNU" style for perl-mode and cperl-mode.
399## Local Variables:
400## perl-indent-level: 2
401## perl-continued-statement-offset: 2
402## perl-continued-brace-offset: 0
403## perl-brace-offset: 0
404## perl-brace-imaginary-offset: 0
405## perl-label-offset: -2
406## cperl-indent-level: 2
407## cperl-brace-offset: 0
408## cperl-continued-brace-offset: 0
409## cperl-label-offset: -2
410## cperl-extra-newline-before-brace: t
411## cperl-merge-trailing-else: nil
412## cperl-continued-statement-offset: 2
413## End:
bison