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Re: little problem w/ pre and post increments...
- To: "Fred Baumgarten" <dc6iq at hotmail dot com>
- Subject: Re: little problem w/ pre and post increments...
- From: Alexandre Oliva <aoliva at redhat dot com>
- Date: 16 Jun 2000 14:17:53 -0300
- Cc: gcc-bugs at gcc dot gnu dot org
- Organization: GCC Team, Red Hat
- References: <20000616161742.96612.qmail@hotmail.com>
On Jun 16, 2000, "Fred Baumgarten" <dc6iq@hotmail.com> wrote:
> I tried this one, resulting in different results using optimized code
> or not:
> int y=x++ + ++x;
You modify the same variable twice without intervening sequence
points. This invokes undefined behavior.
--
Alexandre Oliva Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist *Please* write to mailing lists, not to me