|Impact of large yacc grammar on optimizations firstname.lastname@example.org (1996-06-26)|
|Re: Impact of large yacc grammar on optimizations email@example.com (1996-06-30)|
|From:||firstname.lastname@example.org (Gene Wirchenko)|
|Date:||30 Jun 1996 16:45:03 -0400|
|Organization:||MIND LINK! - British Columbia, Canada|
|Keywords:||yacc, C, comment|
email@example.com (Colm McHugh) wrote:
>I have a question about what C compiler optimizations get lost when
>compiling an enormous piece of code.
>For example, I have a large yacc grammar with a lot of actions, and
>yacc produces a yyparse function that is 10626 lines, with a switch
>statement that is 10204 lines long, and has 986 cases.
I do not have a copy of the Standard, but have seen posts in C
newsgroups claiming that the number of cases required to be handled by
a compiler is rather lower than 986. You may wish to consult both the
Standard and your compiler's documentation with regard to their
[Good point -- the standard only requires compilers to accept 257 case
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