Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755237AbXFXXXj (ORCPT ); Sun, 24 Jun 2007 19:23:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752351AbXFXXXa (ORCPT ); Sun, 24 Jun 2007 19:23:30 -0400 Received: from kanga.kvack.org ([66.96.29.28]:54186 "EHLO kanga.kvack.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752347AbXFXXX3 (ORCPT ); Sun, 24 Jun 2007 19:23:29 -0400 Date: Sun, 24 Jun 2007 19:23:14 -0400 From: Benjamin LaHaise To: Arjan van de Ven Cc: Oleg Verych , rae l , 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 Message-ID: <20070624232314.GA971@kvack.org> References: <467cac85.081b600a.5b88.457f@mx.google.com> <91b13c310706240558p70dbaed2g570b57ab480aa974@mail.gmail.com> <20070624222518.GA10398@flower.upol.cz> <1182723318.6819.5.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1182723318.6819.5.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 687 Lines: 16 On Sun, Jun 24, 2007 at 03:15:17PM -0700, Arjan van de Ven wrote: > 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. The last time I checked, gcc generated horrible badly performing code for builtin memset/memcpy() when -Os is specified. -ben -- "Time is of no importance, Mr. President, only life is important." Don't Email: . - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/