#! /usr/bin/perl -w
# Copyright (C) 2006, 2008-2015 Free Software Foundation, Inc.
#
# This file is part of Bison, the GNU Compiler Compiler.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
=head1 NAME
bench.pl - bench marks for Bison parsers.
=head1 SYNOPSIS
./bench.pl [OPTIONS]... DIRECTIVES
=head1 DIRECTIVES
Specify the set of benches to run. The following grammar defines the
I<directives>:
directives ::=
directives | directives -- Alternation
| directives & directives -- Concatenation
| [ directives> ] -- Optional
| ( directives> ) -- Parentheses
| %b PATH -- Use bison at PATH for this bench
| #d NAME[=VALUE] -- %code { #define NAME [VALUE] }
| %d NAME[=VALUE] -- %define NAME ["VALUE"]
| %s skeleton -- %skeleton "skeleton"
| directive
Parentheses only group to override precedence. For instance:
[ %debug ] & [ %error-verbose ] & [ %define variant ]
will generate eight different cases.
=head1 OPTIONS
=over 4
=item B<-b>, B<--bench>
Predefined benches, that is, combimation between a grammar and a I<directives>
request.
=over 4
=item I<push>
Test the push parser vs. the pull interface. Use the C parser.
=item I<variant>
Test the use of variants instead of union in the C++ parser.
=back
=item B<-c>, B<--cflags>=I<flags>
Flags to pass to the C or C++ compiler. Defaults to -O2.
=item B<-d>, B<--directive>=I<directives>
Add a set of Bison directives to bench against each other.
=item B<-g>, B<--grammar>=I<grammar>
Select the base I<grammar> to use. Defaults to I<calc>.
=over 4
=item I<calc>
Traditional calculator.
=item I<list>
C++ grammar that uses std::string and std::list. Can be used with
or without %define variant.
=item I<triangular>
Artificial grammar with very long rules.
=back
=item B<-h>, B<--help>
Display this message and exit succesfully. The more verbose, the more
details.
=item B<-i>, B<--iterations>=I<integer>
Say how many times a single test of the bench must be run. If
negative, specify the minimum number of CPU seconds to run. Defaults
to -1.
=item B<-q>, B<--quiet>
Decrease the verbosity level (defaults to 1).
=item B<-v>, B<--verbose>
Raise the verbosity level (defaults to 1).
=back
=cut
use strict;
use IO::File;
##################################################################
=head1 VARIABLES
=over 4
=item C<@bench>
The list of benches to run.
=item C<$bison>
The Bison program to use to compile the grammar.
=item C<$cc>
The C compiler.
=item C<$cxx>
The C++ compiler.
=item C<$cflags>
Compiler flags (C or C++).
=item C<@directive>
A list of directive sets to measure against each other.
=item C<$iterations>
The number of times the parser is run for a bench.
=item C<$verbose>
Verbosity level.
=back
=cut
my $bench;
my $bison = $ENV{'BISON'} || '@abs_top_builddir@/tests/bison';
my $cc = $ENV{'CC'} || 'gcc';
my $cxx = $ENV{'CXX'} || 'g++';
my $cflags = '-O2';
my @directive = ();
my $grammar = 'calc';
my $iterations = -1;
my $verbose = 1;
=head1 FUNCTIONS
=over 4
=item C<verbose($level, $message)>
Report the C<$message> is C<$level> E<lt>= C<$verbose>.
=cut
sub verbose($$)
{
my ($level, $message) = @_;
print STDERR $message
if $level <= $verbose;
}
######################################################################
=item C<directives($bench, @directive)>
Format the list of directives for Bison for bench named C<$bench>.
=cut
sub directives($@)
{
my ($bench, @directive) = @_;
my $res = "/* Directives for bench '$bench'. */\n";
$res .= join ("\n", @directive) . "\n";
$res .= "/* End of directives for bench '$bench'. */\n";
return $res;
}
######################################################################
=item C<generate_grammar_triangular ($base, $max, @directive)>
Create a large triangular grammar which looks like :
input:
exp { if ($1 != 0) abort (); $$ = $1; }
| input exp { if ($2 != $1 + 1) abort (); $$ = $2; }
;
exp:
END { $$ = 0; }
| "1" END { $$ = 1; }
| "1" "2" END { $$ = 2; }
| "1" "2" "3" END { $$ = 3; }
| "1" "2" "3" "4" END { $$ = 4; }
| "1" "2" "3" "4" "5" END { $$ = 5; }
;
C<$base> is the base name for the file to create (F<$base.y>).
C<$max> is the number of such rules (here, 5). You may pass
additional Bison C<@directive>.
The created parser is self contained: it includes its scanner, and
source of input.
=cut
sub generate_grammar_triangular ($$@)
{
my ($base, $max, @directive) = @_;
my $directives = directives ($base, @directive);
my $out = new IO::File ">$base.y"
or die;
print $out <<EOF;
%error-verbose
%{
#include <stdio.h>
#include <stdlib.h>
static int yylex (void);
static void yyerror (const char *msg);
%}
$directives
%union
{
int val;
};
%token END "end"
%type <val> exp input
EOF
for my $size (1 .. $max)
{
print $out "%token t$size $size \"$size\"\n";
};
print $out <<EOF;
%%
input:
exp { if (\$1 != 0) abort (); \$\$ = \$1; }
| input exp { if (\$2 != \$1 + 1) abort (); \$\$ = \$2; }
;
exp:
END
{ \$\$ = 0; }
EOF
for my $size (1 .. $max)
{
use Text::Wrap;
print $out wrap ("| ", " ",
(map { "\"$_\"" } (1 .. $size)),
" END \n"),
" { \$\$ = $size; }\n";
};
print $out ";\n";
print $out <<EOF;
%%
static int
yylex (void)
{
static int inner = 1;
static int outer = 0;
if (outer > $max)
return 0;
else if (inner > outer)
{
inner = 1;
++outer;
return END;
}
return inner++;
}
static void
yyerror (const char *msg)
{
fprintf (stderr, "%s\\n", msg);
}
int
main (void)
{
#if YYDEBUG
yydebug = !!getenv ("YYDEBUG");
#endif
return yyparse ();
}
EOF
}
##################################################################
=item C<calc_input ($base, $max)>
Generate the input file F<$base.input> for the calc parser. The input
is composed of two expressions. The first one is using left recursion
only and consumes no stack. The second one requires a deep stack.
These two expressions are repeated C<$max> times in the output file.
=cut
sub calc_input ($$)
{
my ($base, $max) = @_;
my $out = new IO::File ">$base.input"
or die;
foreach (1 .. $max)
{
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";
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";
}
}
##################################################################
=item C<generate_grammar_calc ($base, $max, @directive)>
Generate a Bison file F<$base.y> for a calculator parser in C. Pass
the additional Bison C<@directive>. C<$max> is ignored, but left to
have the same interface as C<triangular_grammar>.
=cut
sub generate_grammar_calc ($$@)
{
my ($base, $max, @directive) = @_;
my $directives = directives ($base, @directive);
# Putting this request here is stupid, since the input will be
# generated each time we generate a grammar.
calc_input ('calc', 200);
my $out = new IO::File ">$base.y"
or die;
print $out <<EOF;
%{
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define USE(Var)
/* Exercise pre-prologue dependency to %union. */
typedef int semantic_value;
static semantic_value global_result = 0;
static int global_count = 0;
%}
$directives
%error-verbose
/* Exercise %union. */
%union
{
semantic_value ival;
};
%{
static int power (int base, int exponent);
/* yyerror receives the location if:
- %location & %pure & %glr
- %location & %pure & %yacc & %parse-param. */
static void yyerror (const char *s);
#if YYPURE
static int yylex (YYSTYPE* yylvalp);
#else
static int yylex (void);
#endif
%}
/* Bison Declarations */
%token CALC_EOF 0 "end of input"
%token <ival> NUM "number"
%type <ival> exp
%nonassoc '=' /* comparison */
%left '-' '+'
%left '*' '/'
%left NEG /* negation--unary minus */
%right '^' /* exponentiation */
/* Grammar follows */
%%
input:
line
| input line
;
line:
'\\n'
| exp '\\n' { USE (\$1); }
;
exp:
NUM { \$\$ = \$1; }
| exp '=' exp
{
if (\$1 != \$3)
fprintf (stderr, "calc: error: %d != %d\\n", \$1, \$3);
\$\$ = \$1;
}
| exp '+' exp { \$\$ = \$1 + \$3; }
| exp '-' exp { \$\$ = \$1 - \$3; }
| exp '*' exp { \$\$ = \$1 * \$3; }
| exp '/' exp { \$\$ = \$1 / \$3; }
| '-' exp %prec NEG { \$\$ = -\$2; }
| exp '^' exp { \$\$ = power (\$1, \$3); }
| '(' exp ')' { \$\$ = \$2; }
| '(' error ')' { \$\$ = 1111; }
| '!' { \$\$ = 0; YYERROR; }
| '-' error { \$\$ = 0; YYERROR; }
;
%%
/* The input. */
static FILE *input;
static void
yyerror (const char *s)
{
fprintf (stderr, "%s\\n", s);
}
static int
get_char (void)
{
return getc (input);
}
static void
unget_char ( int c)
{
ungetc (c, input);
}
static int
read_signed_integer (void)
{
int c = get_char ();
int sign = 1;
int n = 0;
if (c == '-')
{
c = get_char ();
sign = -1;
}
while (isdigit (c))
{
n = 10 * n + (c - '0');
c = get_char ();
}
unget_char (c);
return sign * n;
}
static int
#if YYPURE
# define yylval (*yylvalp)
yylex (YYSTYPE* yylvalp)
#else
yylex (void)
#endif
{
int c;
/* Skip white space. */
while ((c = get_char ()) == ' ' || c == '\t')
continue;
/* process numbers */
if (c == '.' || isdigit (c))
{
unget_char ( c);
yylval.ival = read_signed_integer ();
return NUM;
}
/* Return end-of-file. */
if (c == EOF)
return CALC_EOF;
/* Return single chars. */
return c;
}
static int
power (int base, int exponent)
{
assert (0 <= exponent);
int res = 1;
for (/* Niente */; exponent; --exponent)
res *= base;
return res;
}
int
main (int argc, const char **argv)
{
semantic_value result = 0;
int count = 0;
int status;
#if YYDEBUG
yydebug = !!getenv ("YYDEBUG");
#endif
input = fopen ("calc.input", "r");
if (!input)
{
perror ("calc.input");
return 3;
}
status = yyparse ();
if (global_result != result)
abort ();
if (global_count != count)
abort ();
return status;
}
EOF
}
##################################################################
=item C<generate_grammar_list ($base, $max, @directive)>
Generate a Bison file F<$base.y> for a C++ parser that uses C++
objects (std::string, std::list). Tailored for using %define variant.
=cut
sub generate_grammar_list ($$@)
{
my ($base, $max, @directive) = @_;
my $directives = directives ($base, @directive);
my $variant = grep { /%define "?variant"?/ } @directive;
my $token_ctor = grep { /%define "?api.token.constructor"?/ } @directive;
my $out = new IO::File ">$base.y"
or die;
print $out <<EOF;
%language "C++"
%defines
%locations
$directives
%code requires // *.h
{
#include <string>
}
%code // *.c
{
#include <algorithm>
#include <iostream>
#include <sstream>
#define STAGE_MAX ($max * 10) // max = $max
#define USE_TOKEN_CTOR $token_ctor
#define USE_VARIANTS $variant
// Prototype of the yylex function providing subsequent tokens.
static
#if USE_TOKEN_CTOR
yy::parser::symbol_type yylex();
#else
yy::parser::token_type yylex(yy::parser::semantic_type* yylvalp,
yy::parser::location_type* yyllocp);
#endif
// Conversion to string.
template <typename T>
inline
std::string
string_cast (const T& t)
{
std::ostringstream o;
o << t;
return o.str ();
}
}
%token END_OF_FILE 0
EOF
if ($variant)
{
print $out <<'EOF';
%token <std::string> TEXT
%token <int> NUMBER
%printer { std::cerr << "Number: " << $$; } <int>
%printer { std::cerr << "Text: " << $$; } <std::string>
%type <std::string> text result
%%
result:
text { /* Throw away the result. */ }
;
text:
/* nothing */ { /* This will generate an empty string */ }
| text TEXT { std::swap ($$, $2); }
| text NUMBER { $$ = string_cast($2); }
;
EOF
}
else
{
# Not using Bison variants.
print $out <<'EOF';
%union {int ival; std::string* sval;}
%token <sval> TEXT
%token <ival> NUMBER
%printer { std::cerr << "Number: " << $$; } <ival>
%printer { std::cerr << "Text: " << *$$; } <sval>
%type <sval> text result
%%
result:
text { delete $1; }
;
text:
/* nothing */ { $$ = new std::string; }
| text TEXT { delete $1; $$ = $2; }
| text NUMBER { delete $1; $$ = new std::string (string_cast ($2)); }
;
EOF
}
print $out <<'EOF';
%%
#
static
#if USE_TOKEN_CTOR
yy::parser::symbol_type yylex()
#else
yy::parser::token_type yylex(yy::parser::semantic_type* yylvalp,
yy::parser::location_type* yyllocp)
#endif
{
typedef yy::parser::location_type location_type;
typedef yy::parser::token token;
static int stage = -1;
++stage;
if (stage == STAGE_MAX)
{
#if USE_TOKEN_CTOR
return yy::parser::make_END_OF_FILE (location_type ());
#else
*yyllocp = location_type ();
return token::END_OF_FILE;
#endif
}
else if (stage % 2)
{
#if USE_TOKEN_CTOR
return yy::parser::make_NUMBER (stage, location_type ());
#else
# if defined ONE_STAGE_BUILD
yylvalp->build(stage);
# elif USE_VARIANTS
yylvalp->build<int>() = stage;
# else
yylvalp->ival = stage;
# endif
*yyllocp = location_type ();
return token::NUMBER;
#endif
}
else
{
#if USE_TOKEN_CTOR
return yy::parser::make_TEXT ("A string.", location_type ());
#else
# if defined ONE_STAGE_BUILD
yylvalp->build(std::string("A string."));
# elif USE_VARIANTS
yylvalp->build<std::string>() = std::string("A string.");
# else
yylvalp->sval = new std::string("A string.");
# endif
*yyllocp = location_type ();
return token::TEXT;
#endif
}
abort();
}
// Mandatory error function
void
yy::parser::error(const yy::parser::location_type& loc, const std::string& msg)
{
std::cerr << loc << ": " << msg << std::endl;
}
int main(int argc, char *argv[])
{
yy::parser p;
#if YYDEBUG
p.set_debug_level(!!getenv("YYDEBUG"));
#endif
p.parse();
return 0;
}
EOF
}
##################################################################
=item C<generate_grammar ($name, $base, @directive)>
Generate F<$base.y> by calling C<&generate_grammar_$name>.
=cut
sub generate_grammar ($$@)
{
my ($name, $base, @directive) = @_;
verbose 3, "Generating $base.y\n";
my %generator =
(
"calc" => \&generate_grammar_calc,
"list" => \&generate_grammar_list,
"triangular" => \&generate_grammar_triangular,
);
&{$generator{$name}}($base, 200, @directive);
}
##################################################################
=item C<run ($command)>
Run, possibly verbosely, the shell C<$command>.
=cut
sub run ($)
{
my ($command) = @_;
verbose 3, "$command\n";
system ("$command") == 0
or die "$command failed";
}
##################################################################
=item C<compile ($base)>
Compile C<$base.y> to an executable C, Using the C or C++ compiler
depending on the %language specification in C<$base.y>.
=cut
sub compile ($)
{
my ($base) = @_;
my $language = `sed -ne '/%language "\\(.*\\)"/{s//\\1/;p;q;}' $base.y`;
chomp $language;
my $compiler = $language eq 'C++' ? $cxx : $cc;
my $my_bison = `sed -ne '/%bison "\\(.*\\)"/{s//\\1/;p;q;}' $base.y`;
run ((length $my_bison ? $my_bison : $bison) . " $base.y -o $base.c");
run "$compiler -o $base $cflags $base.c";
}
######################################################################
=item C<bench ($grammar, @token)>
Generate benches for the C<$grammar> and the directive specification
given in the list of C<@token>.
=cut
sub bench ($@)
{
my ($grammar, @token) = @_;
use Benchmark qw (:all :hireswallclock);
my @directive = parse (@token);
# Set up the benches as expected by timethese.
my %bench;
# A counter of directive sets.
my $count = 1;
for my $d (@directive)
{
$bench{$count} = $d;
printf " %2d. %s\n", $count, join (' ', split ("\n", $d));
$count++;
};
# For each bench, capture the size.
my %size;
while (my ($name, $directives) = each %bench)
{
generate_grammar ($grammar, $name, $directives);
# Compile the executable.
compile ($name);
$bench{$name} = "system ('./$name');";
chop($size{$name} = `wc -c <$name`);
}
# Run the benches.
#
# STYLE can be any of 'all', 'none', 'noc', 'nop' or 'auto'. 'all'
# shows each of the 5 times available ('wallclock' time, user time,
# system time, user time of children, and system time of
# children). 'noc' shows all except the two children times. 'nop'
# shows only wallclock and the two children times. 'auto' (the
# default) will act as 'all' unless the children times are both
# zero, in which case it acts as 'noc'. 'none' prevents output.
verbose 3, "Running the benches for $grammar\n";
my $res = timethese ($iterations, \%bench, 'nop');
# Output the speed result.
cmpthese ($res, 'nop');
# Display the sizes.
print "Sizes (decreasing):\n";
my $width = 10;
for my $bench (keys %size)
{
$width = length $bench
if $width < length $bench;
}
# Benches sorted by decreasing size.
my @benches_per_size = sort {$size{$b} <=> $size{$a}} keys %size;
for my $bench (@benches_per_size)
{
printf "%${width}s: %5.2fkB\n", $bench, $size{$bench} / 1024;
}
}
######################################################################
=item C<bench_push_parser ()>
Bench the C push parser against the pull parser, pure and impure
interfaces.
=cut
sub bench_push_parser ()
{
bench ('calc',
qw(
[ %d api.pure ]
&
[ %d api.push-pull=both ]
));
}
######################################################################
=item C<bench_variant_parser ()>
Bench the C++ lalr1.cc parser using variants or %union.
=cut
sub bench_variant_parser ()
{
bench ('list',
qw(
[
%d variant
&
[ #d ONE_STAGE_BUILD | %d api.token.constructor ]
]
)
);
}
############################################################################
sub help ($)
{
my ($verbose) = @_;
use Pod::Usage;
# See <URL:http://perldoc.perl.org/pod2man.html#NOTES>.
pod2usage( { -message => "Bench Bison parsers",
-exitval => 0,
-verbose => $verbose,
-output => \*STDOUT });
}
######################################################################
# The end of the directives to parse.
my $eod = "end of directives";
# The list of tokens parsed by the following functions.
my @token;
# eat ($EXPECTED)
# ---------------
# Check that the current token is $EXPECTED, and move to the next.
sub eat ($)
{
my ($expected) = @_;
die "expected $expected, unexpected: $token[0] (@token)\n"
unless $token[0] eq $expected;
shift @token;
}
# Parse directive specifications:
# expr: term (| term)*
# term: fact (& fact)*
# fact: ( expr ) | [ expr ] | dirs
# dirs: %s SKELETON | #d NAME[=VALUE] | %d NAME[=VALUE] | directive
sub parse (@)
{
@token = (@_, $eod);
verbose 3, "Parsing: @token\n";
my @res = parse_expr ();
eat ($eod);
return @res;
}
sub parse_expr ()
{
my @res = parse_term ();
while ($token[0] eq '|')
{
eat ('|');
# Alternation.
push @res, parse_term ();
}
return @res;
}
sub parse_term ()
{
my @res = parse_fact ();
while ($token[0] eq '&')
{
eat ('&');
# Cartesian product.
my @lhs = @res;
@res = ();
for my $rhs (parse_fact ())
{
for my $lhs (@lhs)
{
push @res, $lhs . ($lhs && $rhs ? "\n" : "") . $rhs;
}
}
}
return @res;
}
sub parse_fact ()
{
my @res;
die "unexpected end of expression"
unless defined $token[0];
if ($token[0] eq '(')
{
eat ('(');
@res = parse_expr ();
eat (')');
}
elsif ($token[0] eq '[')
{
eat ('[');
@res = (parse_expr (), '');
eat (']');
}
else
{
@res = parse_dirs ();
}
return @res;
}
sub parse_dirs ()
{
my @res;
die "unexpected end of expression"
unless defined $token[0];
if ($token[0] eq '#d')
{
eat ('#d');
$token[0] =~ s/(.*?)=(.*)/$1 $2/;
@res = ("%code {\n#define $token[0]\n}");
shift @token;
}
elsif ($token[0] eq '%d')
{
shift @token;
$token[0] =~ s/(.*?)=(.*)/$1 "$2"/;
@res = ("%define $token[0]");
shift @token;
}
elsif ($token[0] eq '%s')
{
shift @token;
@res = ("%skeleton \"$token[0]\"");
shift @token;
}
elsif ($token[0] eq '%b')
{
shift @token;
@res = ("/*\n%bison \"$token[0]\"\\\n*/");
shift @token;
}
else
{
@res = $token[0];
shift @token;
}
return @res;
}
######################################################################
sub getopt ()
{
use Getopt::Long;
my %option = (
"b|bench=s" => \$bench,
"c|cflags=s" => \$cflags,
"d|directive=s" => \@directive,
"g|grammar=s" => \$grammar,
"h|help" => sub { help ($verbose) },
"i|iterations=i" => \$iterations,
"q|quiet" => sub { --$verbose },
"v|verbose" => sub { ++$verbose },
);
Getopt::Long::Configure ("bundling", "pass_through");
GetOptions (%option)
or exit 1;
}
######################################################################
getopt;
# Create the directory we work in.
mkdir "benches" or die "cannot create benches"
unless -d "benches";
my $count = 1;
++$count
while -d "benches/$count";
my $dir = "benches/$count";
mkdir $dir
or die "cannot create $dir";
chdir $dir
or die "cannot chdir $dir";
# The following message is tailored to please Emacs' compilation-mode.
verbose 1, "Entering directory `$dir'\n";
verbose 1, "Using bison=$bison.\n";
verbose 2, "Using cc=$cc.\n";
verbose 2, "Using cxx=$cxx.\n";
verbose 2, "Using cflags=$cflags.\n";
verbose 2, "Grammar: $grammar\n";
# Support -b: predefined benches.
my %bench =
(
"push" => \&bench_push_parser,
"variant" => \&bench_variant_parser,
);
if (defined $bench)
{
die "invalid argument for --bench: $bench"
unless defined $bench{$bench};
&{$bench{$bench}}();
exit 0;
}
else
{
# Launch the bench marking.
bench ($grammar, @ARGV);
}
### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End: