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3cedc2dc
AD		 1#! /usr/bin/perl -w
2
9ca7f077 3# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
f16b0819 4#
3cedc2dc 5# This file is part of Bison, the GNU Compiler Compiler.
f16b0819
PE		 6#
7# This program is free software: you can redistribute it and/or modify
3cedc2dc 8# it under the terms of the GNU General Public License as published by
f16b0819
PE		 9# the Free Software Foundation, either version 3 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
3cedc2dc
AD		 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.
f16b0819 16#
3cedc2dc 17# You should have received a copy of the GNU General Public License
f16b0819
PE		 18# along with this program. If not, see <http://www.gnu.org/licenses/>.
19
15129f25
AD		 20=head1 NAME
21
22bench.pl - perform benches on Bison parsers.
23
24=head1 SYNOPSIS
25
3a2803df 26 ./bench.pl [OPTIONS]... BENCHES
15129f25 27
3a2803df 28=head1 BENCHES
a6df593d
AD		 29
30Specify the set of benches to run. I<bench-name> should be one of:
31
32=over 4
33
34=item I<fusion>
35
36Test F<lalr1.cc> with three stacks against F<lalr1-fusion.cc> which
37uses a single one.
38
39=item I<push>
40
41Test the push parser vs. the pull interface. Use the C parser.
42
43=item I<variant>
44
45Test the use of variants instead of union in the C++ parser.
46
47=back
48
3a2803df
AD		 49=head1 OPTIONS
50
7e5f9c54
AD		 51=item B<-c>, B<--cflags>=I<flags>
52
ef05c4d6
AD		 53Flags to pass to the C or C++ compiler. Defaults to -O2.
54
55=item B<-h>, B<--help>
56
57Display this message and exit succesfully. The more verbose, the more
58details.
7e5f9c54
AD		 59
60=item B<-i>, B<--iterations>=I<integer>
61
d11ee647
AD		 62Say how many times a single test of the bench must be run. If
63negative, specify the minimum number of CPU seconds to run. Defaults
ef05c4d6
AD		 64to -1.
65
66=item B<-q>, B<--quiet>
67
68Decrease the verbosity level (defaults to 1).
7e5f9c54
AD		 69
70=item B<-v>, B<--verbose>
71
ef05c4d6 72Raise the verbosity level (defaults to 1).
7e5f9c54 73
e1b74b92
AD		 74=back
75
15129f25
AD		 76=cut
77
3a2803df 78use strict;
3cedc2dc 79use IO::File;
3cedc2dc 80
e1b74b92
AD		 81##################################################################
82
83=head1 VARIABLES
84
85=over 4
86
3a2803df
AD		 87=item C<@bench>
88
89The list of benches to run.
90
e1b74b92
AD		 91=item C<$bison>
92
93The Bison program to use to compile the grammar.
94
95=item C<$cc>
96
97The C compiler.
98
99=item C<$cxx>
100
101The C++ compiler.
102
103=item C<$cflags>
104
105Compiler flags (C or C++).
106
107=item C<$iterations>
108
109The number of times the parser is run for a bench.
110
111=item C<$verbose>
112
113Verbosity level.
114
115=back
116
117=cut
118
2e7944cb 119my $bison = $ENV{'BISON'} || '@abs_top_builddir@/tests/bison';
3cedc2dc 120my $cc = $ENV{'CC'} || 'gcc';
7109a18d 121my $cxx = $ENV{'CXX'} || 'g++';
ef05c4d6
AD		 122my $cflags = '-O2';
123my $iterations = -1;
124my $verbose = 1;
3cedc2dc 125
e1b74b92 126=head1 FUNCTIONS
3cedc2dc 127
e1b74b92 128=over 4
7e5f9c54 129
e1b74b92 130=item C<verbose($level, $message)>
15129f25 131
e1b74b92
AD		 132Report the C<$message> is C<$level> E<lt>= C<$verbose>.
133
134=cut
135
136sub verbose($$)
137{
138 my ($level, $message) = @_;
139 print STDERR $message
140 if $level <= $verbose;
141}
15129f25 142
3a2803df
AD		 143
144######################################################################
145
922730fe
AD		 146=item C<directives($bench, @directive)>
147
148Format the list of directives for Bison for bench named C<$bench>.
149
150=cut
151
152sub directives($@)
153{
5b421a4e 154 my ($bench, @directive) = @_;
922730fe 155 my $res = "/* Directives for bench `$bench'. */\n";
f6038cb8 156 $res .= join ("\n", @directive) . "\n";
922730fe
AD		 157 $res .= "/* End of directives for bench `$bench'. */\n";
158 return $res;
159}
160
3a2803df
AD		 161######################################################################
162
163=item C<generate_grammar_triangular ($base, $max, @directive)>
15129f25
AD		 164
165Create a large triangular grammar which looks like :
166
167 input:
168 exp { if ($1 != 0) abort (); $$ = $1; }
169 | input exp { if ($2 != $1 + 1) abort (); $$ = $2; }
170 ;
171
172 exp:
173 END { $$ = 0; }
174 | "1" END { $$ = 1; }
175 | "1" "2" END { $$ = 2; }
176 | "1" "2" "3" END { $$ = 3; }
177 | "1" "2" "3" "4" END { $$ = 4; }
178 | "1" "2" "3" "4" "5" END { $$ = 5; }
179 ;
180
7e5f9c54 181C<$base> is the base name for the file to create (F<$base.y>).
15129f25 182C<$max> is the number of such rules (here, 5). You may pass
5b421a4e 183additional Bison C<@directive>.
15129f25
AD		 184
185The created parser is self contained: it includes its scanner, and
186source of input.
187=cut
188
3a2803df 189sub generate_grammar_triangular ($$@)
3cedc2dc 190{
5b421a4e
AD		 191 my ($base, $max, @directive) = @_;
192 my $directives = directives ($base, @directive);
3cedc2dc
AD		 193
194 my $out = new IO::File ">$base.y"
195 or die;
196 print $out <<EOF;
197%error-verbose
198%debug
199%{
200#include <stdio.h>
201#include <stdlib.h>
202
203static int yylex (void);
204static void yyerror (const char *msg);
205%}
922730fe 206$directives
3cedc2dc
AD		 207%union
208{
209 int val;
210};
211
212%token END "end"
213%type <val> exp input
214EOF
215
216 for my $size (1 .. $max)
217 {
218 print $out "%token t$size $size \"$size\"\n";
219 };
220
221print $out <<EOF;
222%%
223input:
224 exp { if (\$1 != 0) abort (); \$\$ = \$1; }
225| input exp { if (\$2 != \$1 + 1) abort (); \$\$ = \$2; }
226;
227
228exp:
229 END
230 { \$\$ = 0; }
231EOF
232
233for my $size (1 .. $max)
234 {
235 use Text::Wrap;
236 print $out wrap ("| ", " ",
237 (map { "\"$_\"" } (1 .. $size)),
238 " END \n"),
239 " { \$\$ = $size; }\n";
240 };
241print $out ";\n";
242
243print $out <<EOF;
244%%
245static int
246yylex (void)
247{
248 static int inner = 1;
249 static int outer = 0;
250 if (outer > $max)
251 return 0;
252 else if (inner > outer)
253 {
254 inner = 1;
255 ++outer;
256 return END;
257 }
258 return inner++;
259}
260
261static void
262yyerror (const char *msg)
263{
264 fprintf (stderr, "%s\\n", msg);
265}
266
267int
268main (void)
269{
270 yydebug = !!getenv ("YYDEBUG");
271 return yyparse ();
272}
273EOF
274}
275
276##################################################################
277
15129f25
AD		 278=item C<calc_input ($base, $max)>
279
7e5f9c54 280Generate the input file F<$base.input> for the calc parser. The input
15129f25
AD		 281is composed of two expressions. The first one is using left recursion
282only and consumes no stack. The second one requires a deep stack.
283These two expressions are repeated C<$max> times in the output file.
284
285=cut
286
3cedc2dc
AD		 287sub calc_input ($$)
288{
289 my ($base, $max) = @_;
290 my $out = new IO::File ">$base.input"
291 or die;
292 foreach (1 .. $max)
293 {
294 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";
295 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";
296 }
297}
298
299##################################################################
3a2803df
AD		 300
301=item C<generate_grammar_calc ($base, $max, @directive)>
15129f25 302
7e5f9c54 303Generate a Bison file F<$base.y> for a calculator parser in C. Pass
5b421a4e 304the additional Bison C<@directive>. C<$max> is ignored, but left to
7109a18d 305have the same interface as C<triangular_grammar>.
15129f25
AD		 306
307=cut
3cedc2dc 308
3a2803df 309sub generate_grammar_calc ($$@)
3cedc2dc 310{
5b421a4e
AD		 311 my ($base, $max, @directive) = @_;
312 my $directives = directives ($base, @directive);
3cedc2dc
AD		 313
314 my $out = new IO::File ">$base.y"
315 or die;
316 print $out <<EOF;
317%{
318#include <stdio.h>
319
320#include <stdlib.h>
321#include <string.h>
322#include <ctype.h>
323#define USE(Var)
324
325/* Exercise pre-prologue dependency to %union. */
326typedef int semantic_value;
327
328static semantic_value global_result = 0;
329static int global_count = 0;
330%}
331
3cedc2dc
AD		 332$directives
333%error-verbose
922730fe 334/* Exercise %union. */
3cedc2dc
AD		 335%union
336{
337 semantic_value ival;
338};
339
340%{
341static int power (int base, int exponent);
342/* yyerror receives the location if:
343 - %location & %pure & %glr
344 - %location & %pure & %yacc & %parse-param. */
345static void yyerror (const char *s);
346#if YYPURE
347static int yylex (YYSTYPE* yylvalp);
348#else
349static int yylex (void);
350#endif
351%}
352
353/* Bison Declarations */
354%token CALC_EOF 0 "end of input"
355%token <ival> NUM "number"
356%type <ival> exp
357
358%nonassoc '=' /* comparison */
359%left '-' '+'
360%left '*' '/'
361%left NEG /* negation--unary minus */
362%right '^' /* exponentiation */
363
364/* Grammar follows */
365%%
366input:
367 line
368| input line
369;
370
371line:
372 '\\n'
373| exp '\\n' { USE (\$1); }
374;
375
376exp:
377 NUM { \$\$ = \$1; }
378| exp '=' exp
379 {
380 if (\$1 != \$3)
381 fprintf (stderr, "calc: error: %d != %d\\n", \$1, \$3);
382 \$\$ = \$1;
383 }
384| exp '+' exp { \$\$ = \$1 + \$3; }
385| exp '-' exp { \$\$ = \$1 - \$3; }
386| exp '*' exp { \$\$ = \$1 * \$3; }
387| exp '/' exp { \$\$ = \$1 / \$3; }
388| '-' exp %prec NEG { \$\$ = -\$2; }
389| exp '^' exp { \$\$ = power (\$1, \$3); }
390| '(' exp ')' { \$\$ = \$2; }
391| '(' error ')' { \$\$ = 1111; }
392| '!' { \$\$ = 0; YYERROR; }
393| '-' error { \$\$ = 0; YYERROR; }
394;
395%%
396/* The input. */
397static FILE *input;
398
399static void
400yyerror (const char *s)
401{
402 fprintf (stderr, "%s\\n", s);
403}
404
405static int
406get_char (void)
407{
408 return getc (input);
409}
410
411
412static void
413unget_char ( int c)
414{
415 ungetc (c, input);
416}
417
418static int
419read_signed_integer (void)
420{
421 int c = get_char ();
422 int sign = 1;
423 int n = 0;
424
425 if (c == '-')
426 {
427 c = get_char ();
428 sign = -1;
429 }
430
431 while (isdigit (c))
432 {
433 n = 10 * n + (c - '0');
434 c = get_char ();
435 }
436
437 unget_char (c);
438
439 return sign * n;
440}
441
3cedc2dc
AD		 442static int
443#if YYPURE
444# define yylval (*yylvalp)
445yylex (YYSTYPE* yylvalp)
446#else
447yylex (void)
448#endif
449{
450 int c;
451
452 /* Skip white space. */
453 while ((c = get_char ()) == ' ' || c == '\t')
0925d5bf 454 continue;
3cedc2dc
AD		 455
456 /* process numbers */
457 if (c == '.' || isdigit (c))
458 {
459 unget_char ( c);
460 yylval.ival = read_signed_integer ();
461 return NUM;
462 }
463
464 /* Return end-of-file. */
465 if (c == EOF)
466 return CALC_EOF;
467
468 /* Return single chars. */
469 return c;
470}
471
472static int
473power (int base, int exponent)
474{
475 int res = 1;
476 if (exponent < 0)
477 exit (3);
478 for (/* Niente */; exponent; --exponent)
479 res *= base;
480 return res;
481}
482
483
3cedc2dc
AD		 484int
485main (int argc, const char **argv)
486{
487 semantic_value result = 0;
488 int count = 0;
489 int status;
490
491 input = fopen ("calc.input", "r");
492 if (!input)
493 {
494 perror ("calc.input");
495 return 3;
496 }
497
498 status = yyparse ();
499 if (global_result != result)
500 abort ();
501 if (global_count != count)
502 abort ();
503
504 return status;
505}
506EOF
507}
508
509##################################################################
510
3a2803df 511=item C<generate_grammar_variant ($base, $max, @directive)>
7109a18d 512
7e5f9c54 513Generate a Bison file F<$base.y> that uses, or not, the Boost.Variants
5b421a4e 514depending on the C<@directive>.
7109a18d
AD		 515
516=cut
517
3a2803df 518sub generate_grammar_variant ($$@)
7109a18d 519{
5b421a4e
AD		 520 my ($base, $max, @directive) = @_;
521 my $directives = directives ($base, @directive);
f6038cb8 522 my $variant = grep { $_ eq '%define variant' } @directive;
7109a18d
AD		 523
524 my $out = new IO::File ">$base.y"
525 or die;
526 print $out <<EOF;
7109a18d
AD		 527%language "C++"
528%defines
5b421a4e 529$directives
7109a18d 530
5b421a4e 531%code requires // variant.h
7109a18d
AD		 532{
533#include <string>
534}
535
5b421a4e 536%code // variant.c
7109a18d
AD		 537{
538#include <algorithm>
539#include <iostream>
540#include <sstream>
541
542// Prototype of the yylex function providing subsequent tokens.
543static yy::parser::token_type yylex(yy::parser::semantic_type* yylval);
544
3a2803df 545#define STAGE_MAX ($max * 10) // max = $max
7109a18d
AD		 546#define USE_VARIANTS $variant
547#if USE_VARIANTS
548# define IF_VARIANTS(True, False) True
549#else
550# define IF_VARIANTS(True, False) False
551#endif
552}
553EOF
554
555 if ($variant)
556 {
557 print $out <<'EOF';
7109a18d
AD		 558%token <std::string> TEXT
559%token <int> NUMBER
560%printer { std::cerr << "Number: " << $$; } <int>
561%printer { std::cerr << "Text: " << $$; } <std::string>
562%token END_OF_FILE 0
563%type <std::string> text result
564
565%%
566result:
567 text { /* Throw away the result. */ }
568;
569
570text:
571 /* nothing */ { /* This will generate an empty string */ }
572| text TEXT { std::swap($$,$1); $$.append($2); }
573| text NUMBER {
574 std::swap($$,$1);
575 std::ostringstream ss;
576 ss << ' ' << $2;
577 $$.append(ss.str());
578 }
579;
580EOF
581 }
582 else
583 {
8901f32e 584 # Not using Bison variants.
7109a18d
AD		 585 print $out <<'EOF';
586%union {int ival; std::string* sval;}
587%token <sval> TEXT
588%token <ival> NUMBER
589%printer { std::cerr << "Number: " << $$; } <ival>
590%printer { std::cerr << "Text: " << *$$; } <sval>
591%token END_OF_FILE 0
592%type <sval> text result
593
594%%
595result:
596 text { delete $1; }
597;
598
599text:
600 /* nothing */ { $$ = new std::string; }
601| text TEXT { $$->append(*$2); delete $2; }
602| text NUMBER {
603 std::ostringstream ss;
604 ss << ' ' << $2;
605 $$->append(ss.str());
606 }
607;
608EOF
609 }
610
611 print $out <<'EOF';
612%%
613static
614yy::parser::token_type
615yylex(yy::parser::semantic_type* yylval)
616{
617 static int stage = -1;
618 ++stage;
619 if (stage == STAGE_MAX)
620 return yy::parser::token::END_OF_FILE;
621 else if (stage % 2)
622 {
a6df593d 623 IF_VARIANTS(yylval->build<int>(), yylval->ival) = stage;
7109a18d
AD		 624 return yy::parser::token::NUMBER;
625 }
626 else
627 {
a6df593d 628 IF_VARIANTS(yylval->build<std::string>() =, yylval->sval = new) std::string("A string.");
7109a18d
AD		 629 return yy::parser::token::TEXT;
630 }
631 abort();
632}
633
634// Mandatory error function
635void
636yy::parser::error(const yy::parser::location_type& yylloc,
637 const std::string& message)
638{
639 std::cerr << yylloc << ": " << message << std::endl;
640}
641
642int main(int argc, char *argv[])
643{
644 yy::parser p;
5b421a4e 645#if YYDEBUG
7109a18d 646 p.set_debug_level(!!getenv("YYDEBUG"));
5b421a4e 647#endif
7109a18d
AD		 648 p.parse();
649 return 0;
650}
651EOF
652}
653
654##################################################################
655
3a2803df
AD		 656=item C<generate_grammar ($name, $base, @directive)>
657
658Generate F<$base.y> by calling C<&generate_grammar_$name>.
659
660=cut
661
662sub generate_grammar ($$@)
663{
664 my ($name, $base, @directive) = @_;
665 verbose 2, "Generating $base.y\n";
666 my %generator =
667 (
668 "calc" => \&generate_grammar_calc,
669 "triangular" => \&generate_grammar_triangular,
670 "variant" => \&generate_grammar_variant,
671 );
672 &{$generator{$name}}($base, 200, @directive);
673}
674
675##################################################################
676
677=item C<run ($command)>
678
679Run, possibly verbosely, the shell C<$command>.
680
681=cut
682
683sub run ($)
684{
685 my ($command) = @_;
686 verbose 2, "$command\n";
687 system ("$command") == 0
688 or die "$command failed";
689}
690
691##################################################################
692
15129f25
AD		 693=item C<compile ($base)>
694
7109a18d
AD		 695Compile C<$base.y> to an executable C, Using the C or C++ compiler
696depending on the %language specification in C<$base.y>.
15129f25
AD		 697
698=cut
699
3cedc2dc
AD		 700sub compile ($)
701{
702 my ($base) = @_;
7109a18d
AD		 703 my $language = `sed -ne '/%language "\\(.*\\)"/{s//\\1/;p;q;}' $base.y`;
704 chomp $language;
705
706 my $compiler = $language eq 'C++' ? $cxx : $cc;
707
3a2803df
AD		 708 run "$bison $base.y -o $base.c";
709 run "$compiler -o $base $cflags $base.c";
3cedc2dc
AD		 710}
711
3a2803df
AD		 712######################################################################
713
7484f1d4 714=item C<bench_grammar ($gram, %bench)>
15129f25
AD		 715
716Generate benches for C<$gram>. C<$gram> should be C<calc> or
7484f1d4
AD		 717C<triangle>. C<%bench> is a hash of the form:
718
5b421a4e 719 $name => @directive
7484f1d4 720
5b421a4e 721where C<$name> is the name of the bench, and C<@directive> are the
7484f1d4
AD		 722Bison directive to use for this bench. All the benches are compared
723against each other, repeated 50 times.
15129f25
AD		 724
725=cut
726
7484f1d4 727sub bench_grammar ($%)
3cedc2dc 728{
7484f1d4 729 my ($gram, %test) = @_;
f16b0819 730
d11ee647
AD		 731 use Benchmark qw (:all :hireswallclock);
732
7484f1d4 733 # Set up the benches as expected by timethese.
3cedc2dc 734 my %bench;
d11ee647
AD		 735 # For each bench, capture the size.
736 my %size;
3cedc2dc
AD		 737 while (my ($name, $directives) = each %test)
738 {
3a2803df 739 generate_grammar ($gram, $name, @$directives);
5b421a4e 740 # Compile the executable.
3cedc2dc
AD		 741 compile ($name);
742 $bench{$name} = "system ('./$name');";
d11ee647 743 chop($size{$name} = `wc -c <$name`);
3cedc2dc
AD		 744 }
745
7484f1d4 746 # Run the benches.
d11ee647
AD		 747 #
748 # STYLE can be any of 'all', 'none', 'noc', 'nop' or 'auto'. 'all'
749 # shows each of the 5 times available ('wallclock' time, user time,
750 # system time, user time of children, and system time of
751 # children). 'noc' shows all except the two children times. 'nop'
752 # shows only wallclock and the two children times. 'auto' (the
753 # default) will act as 'all' unless the children times are both
754 # zero, in which case it acts as 'noc'. 'none' prevents output.
ef05c4d6 755 verbose 2, "Running the benches for $gram\n";
7e5f9c54 756 my $res = timethese ($iterations, \%bench, 'nop');
d11ee647
AD		 757
758 # Output the speed result.
3cedc2dc 759 cmpthese ($res, 'nop');
d11ee647
AD		 760
761 # Display the sizes.
cac9e09b 762 print "Sizes (decreasing):\n";
0cc5bead 763 my $width = 10;
d11ee647
AD		 764 for my $bench (keys %size)
765 {
0cc5bead
AD		 766 $width = length $bench
767 if $width < length $bench;
768 }
cac9e09b
AD		 769 # Benches sorted by decreasing size.
770 my @benches_per_size = sort {$size{$b} <=> $size{$a}} keys %size;
771 for my $bench (@benches_per_size)
0cc5bead 772 {
cac9e09b 773 printf "%${width}s: %5.2fkB\n", $bench, $size{$bench} / 1024;
d11ee647 774 }
3cedc2dc
AD		 775}
776
3a2803df 777######################################################################
7484f1d4
AD		 778
779=item C<bench_push_parser ()>
780
781Bench the C push parser against the pull parser, pure and impure
782interfaces.
783
784=cut
785
786sub bench_push_parser ()
787{
7484f1d4
AD		 788 calc_input ('calc', 200);
789 bench_grammar
790 ('calc',
791 (
922730fe
AD		 792 "pull-impure" => [],
793 "pull-pure" => ['%define api.pure'],
794 "push-impure" => ['%define api.push_pull "both"'],
795 "push-pure" => ['%define api.push_pull "both"', '%define api.pure'],
7484f1d4
AD		 796 )
797 );
798}
799
3a2803df
AD		 800######################################################################
801
7109a18d
AD		 802=item C<bench_variant_parser ()>
803
804Bench the C++ lalr1.cc parser using Boost.Variants or %union.
805
806=cut
807
808sub bench_variant_parser ()
809{
810 bench_grammar
811 ('variant',
812 (
8901f32e
AD		 813 "f-union" => ['%skeleton "lalr1.cc"'],
814 "f-uni-deb" => ['%skeleton "lalr1.cc"', '%debug'],
815 "f-var" => ['%skeleton "lalr1.cc"', '%define variant'],
816 "f-var-deb" => ['%skeleton "lalr1.cc"', '%debug', '%define variant'],
817 "f-var-dtr" => ['%skeleton "lalr1.cc"', '%define variant', "%code {\n#define VARIANT_DESTROY\n}"],
818 "f-var-deb-dtr" => ['%skeleton "lalr1.cc"', '%debug', '%define variant', "%code {\n#define VARIANT_DESTROY\n}"],
819 "f-var-deb-dtr-ass" => ['%skeleton "lalr1.cc"', '%debug', '%define variant', "%code {\n#define VARIANT_DESTROY\n}", "%define assert"],
7109a18d
AD		 820 )
821 );
822}
823
3a2803df
AD		 824######################################################################
825
429b4848
AD		 826=item C<bench_fusion_parser ()>
827
828Bench the C++ lalr1.cc parser using Boost.Variants or %union.
829
830=cut
831
832sub bench_fusion_parser ()
833{
834 bench_grammar
835 ('variant',
836 (
8901f32e
AD		 837 "split" => ['%skeleton "lalr1-split.cc"'],
838 "fused" => ['%skeleton "lalr1.cc"'],
429b4848
AD		 839 )
840 );
841}
842
7109a18d
AD		 843############################################################################
844
7e5f9c54
AD		 845sub help ($)
846{
847 my ($verbose) = @_;
848 use Pod::Usage;
849 # See <URL:http://perldoc.perl.org/pod2man.html#NOTES>.
850 pod2usage( { -message => "Bench Bison parsers",
851 -exitval => 0,
852 -verbose => $verbose,
853 -output => \*STDOUT });
854}
855
3a2803df
AD		 856######################################################################
857
7e5f9c54
AD		 858sub getopt ()
859{
860 use Getopt::Long;
3a2803df 861 my %option = (
a6df593d
AD		 862 "c|cflags=s" => \$cflags,
863 "h|help" => sub { help ($verbose) },
864 "i|iterations=i" => \$iterations,
ef05c4d6 865 "q|quiet" => sub { --$verbose },
a6df593d
AD		 866 "v|verbose" => sub { ++$verbose },
867 );
7e5f9c54
AD		 868 Getopt::Long::Configure ("bundling", "pass_through");
869 GetOptions (%option)
870 or exit 1;
871}
872
873######################################################################
874
875getopt;
e1b74b92
AD		 876verbose 1, "Using bison=$bison.\n";
877verbose 1, "Using cc=$cc.\n";
878verbose 1, "Using cxx=$cxx.\n";
879verbose 1, "Using cflags=$cflags.\n";
a6df593d 880
3a2803df
AD		 881for my $b (@ARGV)
882{
883 verbose 1, "Running benchmark $b.\n";
884 bench_fusion_parser() if $b eq "fusion";
885 bench_push_parser() if $b eq "push";
886 bench_variant_parser() if $b eq "variant";
887}
3cedc2dc
AD		 888
889### Setup "GNU" style for perl-mode and cperl-mode.
890## Local Variables:
891## perl-indent-level: 2
892## perl-continued-statement-offset: 2
893## perl-continued-brace-offset: 0
894## perl-brace-offset: 0
895## perl-brace-imaginary-offset: 0
896## perl-label-offset: -2
897## cperl-indent-level: 2
898## cperl-brace-offset: 0
899## cperl-continued-brace-offset: 0
900## cperl-label-offset: -2
901## cperl-extra-newline-before-brace: t
902## cperl-merge-trailing-else: nil
903## cperl-continued-statement-offset: 2
904## End:
bison