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Lemon update 2015-11-09 15:06:26 on branch trunk

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- Avoid recursion in the yy_find_shift_action() routine of the Lemon-generated parser, so that routine can be inlined, for a size reduction and performance increase. (user: drh)
This commit is contained in:
Randy Heit 2016-03-20 12:08:36 -05:00
parent bcdef59c3c
commit 59b14415ff
1 changed files with 51 additions and 41 deletions
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14
tools/lemon/lempar.c
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@ -401,6 +401,7 @@ static int yy_find_shift_action(
if( stateno>=YY_MIN_REDUCE ) return stateno;
assert( stateno <= YY_SHIFT_COUNT );
do{
i = yy_shift_ofst[stateno];
if( i==YY_SHIFT_USE_DFLT ) return yy_default[stateno];
assert( iLookAhead!=YYNOCODE );
@ -417,7 +418,9 @@ static int yy_find_shift_action(
yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[iFallback]);
}
#endif
return yy_find_shift_action(pParser, iFallback);
assert( yyFallback[iFallback]==0 ); /* Fallback loop must terminate */
iLookAhead = iFallback;
continue;
}
#endif
#ifdef YYWILDCARD
@ -435,7 +438,8 @@ static int yy_find_shift_action(
#ifndef NDEBUG
if( yyTraceFILE ){
fprintf(yyTraceFILE, "%sWILDCARD %s => %s\n",
yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[YYWILDCARD]);
yyTracePrompt, yyTokenName[iLookAhead],
yyTokenName[YYWILDCARD]);
}
#endif /* NDEBUG */
return yy_action[j];
@ -447,6 +451,7 @@ static int yy_find_shift_action(
}else{
return yy_action[i];
}
}while(1);
}
/*
@ -625,6 +630,7 @@ static void yy_reduce(
*/
%%
};
assert( yyruleno>=0 && yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
yygoto = yyRuleInfo[yyruleno].lhs;
yysize = yyRuleInfo[yyruleno].nrhs;
yypParser->yyidx -= yysize;
@ -732,7 +738,9 @@ void Parse(
){
YYMINORTYPE yyminorunion;
int yyact; /* The parser action. */
#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
int yyendofinput; /* True if we are at the end of input */
#endif
#ifdef YYERRORSYMBOL
int yyerrorhit = 0; /* True if yymajor has invoked an error */
#endif
@ -755,7 +763,9 @@ void Parse(
yypParser->yystack[0].major = 0;
}
yyminorunion.yy0 = yyminor;
#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
yyendofinput = (yymajor==0);
#endif
ParseARG_STORE;
#ifndef NDEBUG