From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7685 invoked by alias); 8 May 2002 08:57:40 -0000 Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org Received: (qmail 7678 invoked from network); 8 May 2002 08:57:38 -0000 Received: from unknown (HELO Cantor.suse.de) (213.95.15.193) by sources.redhat.com with SMTP; 8 May 2002 08:57:38 -0000 Received: from Hermes.suse.de (Charybdis.suse.de [213.95.15.201]) by Cantor.suse.de (Postfix) with ESMTP id 46B381E571; Wed, 8 May 2002 10:57:26 +0200 (MEST) X-Authentication-Warning: sykes.suse.de: schwab set sender to schwab@suse.de using -f To: Erik Schnetter Cc: gcc@gcc.gnu.org Subject: Re: i386 and asm jumping References: <175EFc-07596WC@fmrl02.sul.t-online.com> X-Yow: I am having FUN... I wonder if it's NET FUN or GROSS FUN? From: Andreas Schwab Date: Wed, 08 May 2002 02:43:00 -0000 In-Reply-To: <175EFc-07596WC@fmrl02.sul.t-online.com> (Erik Schnetter's message of "Wed, 8 May 2002 01:20:08 +0200") Message-ID: User-Agent: Gnus/5.090006 (Oort Gnus v0.06) Emacs/21.2.50 (ia64-suse-linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-SW-Source: 2002-05/txt/msg00562.txt.bz2 Erik Schnetter writes: |> Peter Barada wrote: |> |> > Jumps in asm statements will create problems since the optimizers have |> > no knowledge that there is a possible change in flow caused by the asm |> > statement, and hence will not have an accurate flow diagram of the |> > function. From there its all downhill. |> |> That is true. However, the same could be said from asm code changing |> registers. Why? You can accurately describe this to the compiler. Andreas. -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE GmbH, Deutschherrnstr. 15-19, D-90429 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."