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From: Nathan Sidwell <nathan@acm.org> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: c/7284: incorrectly simplifies leftshift followed by signed power-of-2 division Date: Fri, 12 Jul 2002 09:46:00 -0000 [thread overview] Message-ID: <20020712164601.18891.qmail@sources.redhat.com> (raw) The following reply was made to PR c/7284; it has been noted by GNATS. From: Nathan Sidwell <nathan@acm.org> To: Al Grant <AlGrant@myrealbox.com> Cc: falk.hueffner@student.uni-tuebingen.de, nathan@gcc.gnu.org, algrant@acm.org, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: c/7284: incorrectly simplifies leftshift followed by signed power-of-2 division Date: Fri, 12 Jul 2002 17:37:53 +0100 Al Grant wrote: > I read the C89 standard (and the C++ standard). you need to read more carefully. KnR 2 A7.8 says the same as C99, C++ says [5]/5 that if the result is not in the range of representable values, the behaviour is undefined. nathan -- Dr Nathan Sidwell :: Computer Science Department :: Bristol University The voices in my head told me to say this nathan@acm.org http://www.cs.bris.ac.uk/~nathan/ nathan@cs.bris.ac.uk
next reply other threads:[~2002-07-12 16:46 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-07-12 9:46 Nathan Sidwell [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-02-13 16:06 rearnsha 2002-07-12 12:56 Nathan Sidwell 2002-07-12 10:06 Falk Hueffner 2002-07-12 9:26 Falk Hueffner 2002-07-12 8:16 Falk Hueffner 2002-07-12 8:06 Al Grant 2002-07-12 7:12 nathan 2002-07-12 4:26 algrant
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