From: Andreas Schwab <schwab@linux-m68k.org>
To: 18995@debbugs.gnu.org
Cc: haroogan@gmail.com
Subject: bug#18995: Error: Could not reserve dynamic heap area.
Date: Sun, 09 Nov 2014 17:30:21 +0100 [thread overview]
Message-ID: <87vbmoqqua.fsf@igel.home> (raw)
In-Reply-To: <83egtcpd3z.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 09 Nov 2014 18:12:16 +0200")
Eli Zaretskii <eliz@gnu.org> writes:
> Given that, it is justified for GCC to give us what we deserve, i.e. a
> loop "unrolled" by executing its body only once. I present the
> disassembly below, for the curious, and it's clear that there's no
> loop there, and also the value of 'size' is never tested at all, since
> GCC decided that the condition 'size > 0x00100000' is always true.
But if you replace 'size > 0x00100000' with true, you get a loop that is
conditionalized by '!ptr', which depends on the execution of the loop
body. Why would it be correct to execute the loop only once,
unconditionally?
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."
next prev parent reply other threads:[~2014-11-09 16:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-08 15:22 bug#18995: Error: Could not reserve dynamic heap area Alexander Shukaev
2014-11-08 17:29 ` Eli Zaretskii
2014-11-08 18:17 ` Alexander Shukaev
2014-11-08 18:30 ` Eli Zaretskii
2014-11-08 18:40 ` Alexander Shukaev
2014-11-08 18:57 ` Eli Zaretskii
2014-11-08 19:16 ` Alexander Shukaev
2014-11-08 19:50 ` Eli Zaretskii
2014-11-08 19:58 ` Alexander Shukaev
2014-11-08 20:05 ` Eli Zaretskii
2014-11-08 20:49 ` Daniel Colascione
2014-11-09 16:12 ` Eli Zaretskii
2014-11-09 16:30 ` Andreas Schwab [this message]
2014-11-09 16:47 ` Eli Zaretskii
[not found] ` <545F94E4.5060102@dancol.org>
2014-11-09 16:30 ` Alexander Shukaev
[not found] ` <837fz4pc4o.fsf@gnu.org>
2014-11-09 16:40 ` Daniel Colascione
2014-11-09 16:35 ` Andreas Schwab
2014-11-09 16:39 ` Alexander Shukaev
2014-11-09 16:49 ` Eli Zaretskii
2014-11-09 16:53 ` Alexander Shukaev
2014-11-09 17:17 ` Eli Zaretskii
2014-11-09 17:14 ` Eli Zaretskii
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87vbmoqqua.fsf@igel.home \
--to=schwab@linux-m68k.org \
--cc=18995@debbugs.gnu.org \
--cc=haroogan@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).