From: Davide Libenzi <davidel@xmailserver.org>
To: Mikael Pettersson <mikpe@it.uu.se>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: if (unlikely(...)) == unnecessary?
Date: Wed, 28 Jan 2009 11:59:01 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.1.10.0901281156290.21401@alien.or.mcafeemobile.com> (raw)
In-Reply-To: <18816.47047.304831.827133@harpo.it.uu.se>
On Wed, 28 Jan 2009, Mikael Pettersson wrote:
> Davide Libenzi writes:
> > I noticed that GCC >= 3.3 (not tried the ones before) automatically
> > branches out the "if" code (and follow-through the "else" code, if there).
> > Is that a coincidence or a rule we can rely on going forward?
>
> Coincidence.
>
> Why on earth would you want to rely on an purely private implementation
> detail like that?
I didn't want to. I was just curious if anyone that actually followed GCC
developments in the last few years could shed some light on it.
- Davide
prev parent reply other threads:[~2009-01-28 19:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-28 16:54 Davide Libenzi
2009-01-28 17:55 ` Chris Snook
2009-01-28 19:41 ` Davide Libenzi
2009-01-28 20:39 ` Chris Snook
2009-01-28 21:10 ` Davide Libenzi
2009-01-28 19:53 ` Mikael Pettersson
2009-01-28 19:59 ` Davide Libenzi [this message]
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