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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/52699] infinite loop generated with -O0
Date: Thu, 12 Apr 2012 13:10:00 -0000	[thread overview]
Message-ID: <bug-52699-4-1Yn5LIq7wN@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52699-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52699

--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-04-12 13:09:39 UTC ---
And the problem seems pretty clear: we have computations like:

      __s0 = result_type(1) << __w0;

with __w0 which can be 32, result_type 32 bits, thus definitely we aren't
handling a mathematical 2^32, as we should per 26.5.4.3. A fix should be
relatively easy.


  parent reply	other threads:[~2012-04-12 13:10 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-24  7:54 [Bug c++/52699] New: " jarrydb at cse dot unsw.edu.au
2012-03-24  7:55 ` [Bug c++/52699] " jarrydb at cse dot unsw.edu.au
2012-03-24  7:56 ` jarrydb at cse dot unsw.edu.au
2012-03-24  7:57 ` jarrydb at cse dot unsw.edu.au
2012-03-24  8:07 ` jarrydb at cse dot unsw.edu.au
2012-03-24  8:42 ` [Bug libstdc++/52699] " pinskia at gcc dot gnu.org
2012-04-12 12:53 ` paolo.carlini at oracle dot com
2012-04-12 13:10 ` paolo.carlini at oracle dot com [this message]
2012-04-14 22:34 ` paolo at gcc dot gnu.org
2012-04-15  2:15 ` paolo at gcc dot gnu.org
2012-04-15  2:15 ` paolo.carlini at oracle dot com

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