From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13165 invoked by alias); 15 Jan 2012 20:37:34 -0000 Received: (qmail 13157 invoked by uid 22791); 15 Jan 2012 20:37:33 -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; Sun, 15 Jan 2012 20:37:08 +0000 From: "krebbel at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug bootstrap/51860] [4.7 regression] s390 esa mode bootstrap comparison failure since transactional memory branch merge Date: Sun, 15 Jan 2012 20:44:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: bootstrap X-Bugzilla-Keywords: X-Bugzilla-Severity: critical X-Bugzilla-Who: krebbel at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P1 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 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: 2012-01/txt/msg01710.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51860 --- Comment #3 from Andreas Krebbel 2012-01-15 20:37:02 UTC --- (In reply to comment #2) > Reducing a -fcompare-debug failure on c-common.c with delta. Thanks for working on this! I already had a quick look. The problem has to do with the s390 reorg pass having to split the literal pool. The jump over the literal pool is placed differently with and without debug info. There are several places where we still use NEXT_INSN or INSN_P what will be affected by DEBUG_INSNs being present. I'll track this down tomorrow. no debug info: L33: 0x4ff9fc basr r13, r0 0x4ff9fe la r13, 14(r13) 0x4ffa02 basr r14, r12 0x4ffa04 basr r14, r11 0x4ffa06 j L34 0x4ffa0a nopr r7 L34: 0x4ffb60 lhi r1, 0 0x4ffb64 icm r1, 3, 0(r2) with debug info: L33: 0x4ff9fc basr r13, r0 0x4ff9fe la r13, 18(r13) 0x4ffa02 basr r14, r12 0x4ffa04 basr r14, r11 0x4ffa06 lhi r1, 0 0x4ffa0a j L34 0x4ffa0e nopr r7 L34: 0x4ffb64 icm r1, 3, 0(r2)