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From: Mark Mitchell <mark@codesourcery.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: c/7139: Shifting 1 through a 64bit int fails at 32bit line
Date: Thu, 27 Jun 2002 15:56:00 -0000 [thread overview]
Message-ID: <20020627225601.17376.qmail@sources.redhat.com> (raw)
The following reply was made to PR c/7139; it has been noted by GNATS.
From: Mark Mitchell <mark@codesourcery.com>
To: Simon Shapiro <shimon@nomis-storage.com>,
"mmitchel@gcc.gnu.org" <mmitchel@gcc.gnu.org>,
"gcc-bugs@gcc.gnu.org" <gcc-bugs@gcc.gnu.org>,
"gcc-prs@gcc.gnu.org" <gcc-prs@gcc.gnu.org>,
"nobody@gcc.gnu.org" <nobody@gcc.gnu.org>,
"shimon@simon-shapiro.com" <shimon@simon-shapiro.com>,
"gcc-gnats@gcc.gnu.org" <gcc-gnats@gcc.gnu.org>
Cc:
Subject: Re: c/7139: Shifting 1 through a 64bit int fails at 32bit line
Date: Thu, 27 Jun 2002 15:46:41 -0700
--On Thursday, June 27, 2002 06:26:25 PM +0100 Simon Shapiro
<shimon@nomis-storage.com> wrote:
> Thax for looking into this problem.
>
> However, I would like to suggest that you may have dismissed the
> problem a bit too quickly.
No, I understood it.
You need to take a look at the C standard.
If ints have 32 bits, (1 << 32) has undefined behavior.
--
Mark Mitchell mark@codesourcery.com
CodeSourcery, LLC http://www.codesourcery.com
next reply other threads:[~2002-06-27 22:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-27 15:56 Mark Mitchell [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-07-01 17:06 Simon Shapiro
2002-06-27 15:36 Simon Shapiro
2002-06-27 15:12 mmitchel
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