From: Arjan van de Ven <arjan@infradead.org>
To: Oleg Verych <olecom@flower.upol.cz>
Cc: rae l <crquan@gmail.com>,
trivial@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] trivial: the memset operation on a automatic array variable should be optimized out by data initialization
Date: Sun, 24 Jun 2007 15:15:17 -0700 [thread overview]
Message-ID: <1182723318.6819.5.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <20070624222518.GA10398@flower.upol.cz>
> > I think all these benefits are the gcc's __builtin_memset optimization
> > than the explicit call to memset.
>
> ... or from complex memset() implementation (some chips even didn't do
> `rep' fast enough somehow). Maybe code like below will be acceptable for
> both optimizers and maintainers?
we should just alias our memset to the __builtin one, and then provide a
generic one from lib/ for the cases gcc needs to do a fallback.
next prev parent reply other threads:[~2007-06-24 22:15 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-23 5:15 [PATCH] trivial: the memset operation on a automatic array variable should be optimized out by data initialization Denis Cheng
2007-06-23 7:59 ` Oleg Verych
2007-06-23 13:13 ` Adrian Bunk
2007-06-23 13:41 ` Oleg Verych
2007-06-23 13:57 ` Adrian Bunk
2007-06-23 15:21 ` Segher Boessenkool
2007-06-24 12:58 ` rae l
2007-06-24 22:25 ` Oleg Verych
2007-06-24 22:15 ` Arjan van de Ven [this message]
2007-06-24 23:23 ` Benjamin LaHaise
2007-06-25 0:09 ` Arjan van de Ven
2007-06-25 0:12 ` Benjamin LaHaise
2007-06-25 0:23 ` Arjan van de Ven
2007-06-25 0:41 ` -Os versus -O2 Adrian Bunk
2007-06-25 0:58 ` Arjan van de Ven
2007-06-25 1:08 ` david
2007-06-25 1:17 ` Arjan van de Ven
2007-06-25 1:33 ` david
2007-06-25 1:41 ` Rene Herman
2007-06-25 5:04 ` Willy Tarreau
2007-06-25 7:08 ` Segher Boessenkool
2007-06-25 7:15 ` david
2007-06-25 7:41 ` Segher Boessenkool
2007-06-25 8:19 ` Willy Tarreau
2007-06-25 8:41 ` Segher Boessenkool
2007-06-25 7:03 ` Segher Boessenkool
2007-06-25 7:13 ` david
2007-06-25 7:35 ` Segher Boessenkool
2007-06-25 1:33 ` Adrian Bunk
2007-06-25 1:23 ` Rene Herman
2007-06-25 1:31 ` Rene Herman
2007-06-25 1:34 ` Jeff Garzik
2007-06-25 1:46 ` Adrian Bunk
2007-06-25 2:19 ` david
2007-06-24 23:33 ` memset() with zeroes (Re: [PATCH] trivial: the memset operation on a automatic array variable should be optimized out by data initialization) Oleg Verych
-- strict thread matches above, loose matches on Subject: below --
2007-06-18 10:05 [PATCH] trivial: the memset operation on a automatic array variable should be optimized out by data initialization Denis Cheng
2007-06-18 10:25 ` Robert P. J. Day
2007-06-18 14:24 ` WANG Cong
2007-06-18 17:07 ` Jeremy Fitzhardinge
2007-06-19 13:27 ` Adrian Bunk
2007-06-21 13:21 ` rae l
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