From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1842 invoked by alias); 30 Jul 2012 16:15:52 -0000 Received: (qmail 1832 invoked by uid 22791); 30 Jul 2012 16:15:48 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 30 Jul 2012 16:15:36 +0000 From: "steven at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug pch/53880] [4.8 Regression] compile time regression when generating precompiled headers for boost Date: Mon, 30 Jul 2012 16:15:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: pch X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: steven at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2012-07/txt/msg02163.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53880 --- Comment #30 from Steven Bosscher 2012-07-30 16:15:35 UTC --- Created attachment 27898 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27898 Hack to avoid quadratic loops This makes use of the assumption that this_obj and its comparison companion are loop invariant (they have to be for pointer rewriting). Drops compile time to worse-than-gcc47-but-acceptable levels. Markus, could you give this a try, please?