From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21703 invoked by alias); 18 Feb 2013 09:10:56 -0000 Received: (qmail 21687 invoked by uid 22791); 18 Feb 2013 09:10:54 -0000 X-SWARE-Spam-Status: No, hits=-6.2 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,KHOP_THREADED,RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Received: from cantor2.suse.de (HELO mx2.suse.de) (195.135.220.15) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 18 Feb 2013 09:10:46 +0000 Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 8F4A4A41E0; Mon, 18 Feb 2013 10:10:45 +0100 (CET) Date: Mon, 18 Feb 2013 09:10:00 -0000 From: Richard Biener To: Gerald Pfeifer Cc: Pat Haugen , gcc-patches@gcc.gnu.org, Jakub Jelinek , hjl.tools@gmail.com Subject: Re: [PATCH][RFC] Add -fno-aggressive-loop-optimizations In-Reply-To: Message-ID: References: <5109579A.7070004@linux.vnet.ibm.com> User-Agent: Alpine 2.00 (LNX 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org X-SW-Source: 2013-02/txt/msg00841.txt.bz2 On Sun, 17 Feb 2013, Gerald Pfeifer wrote: > On Thu, 31 Jan 2013, Richard Biener wrote: > > +

GCC now uses more a aggressive analysis to derive an upper bound for > > I think "a " should be omitted here. Yes, that was fixed before commit. > > +the number of iterations of loops using constraints imposed by language > > +standards. This may cause non-conforming programs to no longer work as > > +expected, such as SPEC CPU 2006 464.h264ref and 416.gamess. A new > > +option, -fno-aggressive-loop-optimizations, was added > > +to disable this aggressive analysis.

> > Personally I would reduce aggressiveness and omit "aggressive" in > the last line above. :-) Heh ... as you like ;) Richard.