From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: 2790@emacsbugs.donarmstrong.com, tutufan@gmail.com
Subject: bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit GNU/Linux box
Date: Mon, 30 Mar 2009 09:01:01 -0400 [thread overview]
Message-ID: <jwvvdprw4l5.fsf-monnier+emacsbugreports@gnu.org> (raw)
In-Reply-To: <m2zlf3302d.fsf@igel.home> (Andreas Schwab's message of "Mon, 30 Mar 2009 10:08:10 +0200")
> The compiler can (and does) optimize on the fact that overflow does not
> occur, thus the operation x*4/4 becomes a no-op.
No way!? Hmm... yes, I guess it's within the allowed semantics, indeed.
We could prevent optimization by going through a volatile var,
of course.
So in the end, I still prefer the current solution of removing the
check altogether.
Stefan
next prev parent reply other threads:[~2009-03-30 13:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-26 15:50 bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit Linux box Mike Coleman
2009-03-26 19:58 ` Eli Zaretskii
2009-03-26 21:01 ` Mike Coleman
2009-03-26 21:14 ` Eli Zaretskii
2009-03-26 21:33 ` Mike Coleman
2009-03-27 0:32 ` Stefan Monnier
2009-03-27 0:39 ` Mike Coleman
2009-03-27 3:08 ` bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit Linux Stefan Monnier
2009-03-27 16:29 ` Mike Coleman
2009-03-27 8:46 ` bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit Linux box Eli Zaretskii
2009-03-27 11:21 ` Andreas Schwab
2009-03-27 4:59 ` bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit GNU/Linux box Richard M Stallman
2009-03-27 16:27 ` Mike Coleman
2009-03-27 17:42 ` Eli Zaretskii
2009-03-28 2:12 ` Stefan Monnier
2009-03-28 5:24 ` Mike Coleman
2009-03-29 19:59 ` bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit Stefan Monnier
2009-03-28 8:45 ` bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit GNU/Linux box Eli Zaretskii
2009-03-28 11:12 ` Andreas Schwab
2009-03-28 12:03 ` Eli Zaretskii
2009-03-28 12:40 ` Andreas Schwab
2009-03-28 13:52 ` Eli Zaretskii
2009-03-29 20:13 ` Stefan Monnier
2009-03-29 20:10 ` Stefan Monnier
2009-03-29 20:44 ` Andreas Schwab
2009-03-30 0:59 ` Stefan Monnier
2009-03-30 8:08 ` Andreas Schwab
2009-03-30 13:01 ` Stefan Monnier [this message]
2009-03-30 13:22 ` Andreas Schwab
2009-03-29 2:15 ` Richard M Stallman
2009-03-29 20:14 ` Stefan Monnier
2009-03-28 15:17 ` Richard M Stallman
2009-03-28 16:27 ` Mike Coleman
[not found] ` <mailman.4163.1238258635.31690.bug-gnu-emacs@gnu.org>
2009-03-31 14:17 ` Ted Zlatanov
2011-09-11 22:10 ` bug#2790: emacs 22.1.1 cannot open 5GB file on 64GB 64-bit Linux box Lars Magne Ingebrigtsen
2011-09-12 2:59 ` Eli Zaretskii
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