GNU bug report logs - #2790
emacs 22.1.1 cannot open 5GB file on 64GB 64-bit Linux box

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Package: emacs;

Reported by: Mike Coleman <tutufan <at> gmail.com>

Date: Thu, 26 Mar 2009 16:00:03 UTC

Severity: normal

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 2790 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>,
        tutufan <at> 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

> 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
This bug report was last modified 13 years and 315 days ago.

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