From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29504 invoked by alias); 7 Jul 2011 21:52:37 -0000 Received: (qmail 29495 invoked by uid 22791); 7 Jul 2011 21:52:36 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 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; Thu, 07 Jul 2011 21:52:22 +0000 From: "hp at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug regression/49498] [4.7 Regression]: gcc.dg/uninit-pred-8_b.c bogus warning line 20 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: regression X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hp 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: 4.7.0 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 Date: Thu, 07 Jul 2011 21:52:00 -0000 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: 2011-07/txt/msg00555.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49498 --- Comment #11 from Hans-Peter Nilsson 2011-07-07 21:51:54 UTC --- (In reply to comment #8) > > 2) On the targets that have the problem, is branch cost considered cheap? > No idea. I didn't bother to look at why cris-elf triggers the problem, > but x86 doesn't. Presumably it's a branch-cost or similar issue. I forgot so I had to look myself... At one time the default cost was measured as the best and that stuck; grep and behold the comment. So, "only" ports using the default are affected. > > Solution > > 1) fix the test case by disabling jumpthreading and if-merging > Or xfailing it for the affected targets. FWIW, I don't mind. Whatever solution you feel proud of. ;)