Re: c/7344: performance regression on huge case statements

["Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>]

The following reply was made to PR c/7344; it has been noted by GNATS.

From: "Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>
To: jh@suse.cz
Cc: gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-patches@gcc.gnu.org,
        geoffk@apple.com, neroden@twcny.rr.com, nobody@gcc.gnu.org,
        rschiele@uni-mannheim.de, rth@redhat.com
Subject: Re: c/7344: performance regression on huge case statements
Date: Tue, 15 Oct 2002 14:50:39 -0400 (EDT)

 Jan,
 
 This hunk:
 
 *** expr.c	7 Oct 2002 07:37:09 -0000	1.486
 --- expr.c	11 Oct 2002 14:49:57 -0000
 *************** do_tablejump (index, mode, range, table_
 *** 10941,10946 ****
 --- 10930,10938 ----
        enum machine_mode mode;
   {
     rtx temp, vector;
 + 
 +   if (range > cfun->max_jumptable_ents)
 +     cfun->max_jumptable_ents = range;
 
 can't be right, `range' is an rtx and ->max_jumptable_ents is an int.
 
 It causes a warning regression in gcc (and a hard error with irix6-cc.)
 
 		--Kaveh
 
 PS: Geoff, an automated warning regression checker would have caught
 this... ;-)
 
 --
 Kaveh R. Ghazi			ghazi@caip.rutgers.edu