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From: bangerth@dealii.org To: ernstberg@bigvalley.net, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org Subject: Re: c/10176: Broken nested Do loop: simple example. gcc 3.2 redhat Date: Fri, 21 Mar 2003 01:51:00 -0000 [thread overview] Message-ID: <20030321015128.19756.qmail@sources.redhat.com> (raw) Synopsis: Broken nested Do loop: simple example. gcc 3.2 redhat State-Changed-From-To: open->feedback State-Changed-By: bangerth State-Changed-When: Fri Mar 21 01:51:28 2003 State-Changed-Why: Your program 4x.c is essentially equivalent to this one: -------------------------- int main(void) { unsigned int count = 1; do { if( count % 3 ) { count *= 4; count += 2; } else { count /= 3; } if( count == 1 ) break; if( count == 3 ) break; } while(1); return(0); } ---------------------- What happens is that you never jump out of the inner loop. Unfortunately, I don't see right away why the loop should terminate at all. gcc seems to have the same problem, as does icc. Can you give a simple argument why it should? Thanks Wolfgang http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10176
next reply other threads:[~2003-03-21 1:51 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-21 1:51 bangerth [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-03-21 15:04 bangerth 2003-03-21 1:16 ernstberg
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