From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1461 invoked by alias); 14 Nov 2006 01:37:06 -0000 Received: (qmail 1441 invoked by uid 48); 14 Nov 2006 01:36:58 -0000 Date: Tue, 14 Nov 2006 01:37:00 -0000 Message-ID: <20061114013658.1440.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/29818] code with SSE segfaults with gcc-3.4.6, runs fine with gcc-4.1.1 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "sergstesh at yahoo dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2006-11/txt/msg01202.txt.bz2 List-Id: ------- Comment #5 from sergstesh at yahoo dot com 2006-11-14 01:36 ------- (In reply to comment #4) > (In reply to comment #3) > > I am developing pretty heavy SSE-based code, and performance-wise gcc-3.4.6 is > > the best so far. Sorry, I cant' post the code, but here are performance > > figures (output of 'time' command): > > Then, you are not helping the project: a closed branch is not re-opened because > of a bug and posting performance numbers without a *reduced* snippet > pinpointing the specific issue is not useful to the developers (the only > possible effect is making someone slightly nervous ;) > The "real" piece of code I'm working on is 14923 lines long (the "C" file, not the "i" file). I can think of obfuscating it to the point it becomes not clear what it is doing functionally. We can make a deal: I obfuscate and publish the code, you guys fix the bug preserving, if possible, performance. The code is really complex, and it's not realistic for me to make it smaller. By the way, using gcc-3.4.6 with '-O3' makes performance much worse, worse than the one obtained with gcc-4.1.1. On the other hand, '-O3' applied to gcc-4.1.1 does not change the performance that drastic, though I do not remember at the moment whether the performance improves or deteriorates. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29818