From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18628 invoked by alias); 29 Mar 2011 12:54:52 -0000 Received: (qmail 18614 invoked by uid 22791); 29 Mar 2011 12:54:51 -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; Tue, 29 Mar 2011 12:54:47 +0000 From: "zsojka at seznam dot cz" To: gcc-bugs@gcc.gnu.org Subject: [Bug debug/48333] New: -fcompare-debug failure (length) - "memmove" x "__builtin_memmove" X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: debug X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: zsojka at seznam dot cz X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Date: Tue, 29 Mar 2011 13:10:00 -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: 2011-03/txt/msg02988.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D48333 Summary: -fcompare-debug failure (length) - "memmove" x "__builtin_memmove" Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: debug AssignedTo: unassigned@gcc.gnu.org ReportedBy: zsojka@seznam.cz CC: aoliva@gcc.gnu.org Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Created attachment 23798 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=3D23798 partially reduced testcase Compiler output: $ gcc -O -fkeep-inline-functions -fcompare-debug testcase.ii=20 testcase.ii: In function =E2=80=98std::_Resetiosflags std::resetiosflags(std::ios_base::fmtflags)=E2=80=99: testcase.ii:20948:5: warning: extended initializer lists only available with -std=3Dc++0x or -std=3Dgnu++0x [enabled by default] testcase.ii: In function =E2=80=98std::_Setiosflags std::setiosflags(std::ios_base::fmtflags)=E2=80=99: testcase.ii:20966:5: warning: extended initializer lists only available with -std=3Dc++0x or -std=3Dgnu++0x [enabled by default] testcase.ii: In function =E2=80=98std::_Setbase std::setbase(int)=E2=80=99: testcase.ii:20984:5: warning: extended initializer lists only available with -std=3Dc++0x or -std=3Dgnu++0x [enabled by default] testcase.ii: In function =E2=80=98std::_Setfill<_CharT> std::setfill(_CharT= )=E2=80=99: testcase.ii:21010:7: warning: extended initializer lists only available with -std=3Dc++0x or -std=3Dgnu++0x [enabled by default] testcase.ii: In function =E2=80=98std::_Setprecision std::setprecision(int)= =E2=80=99: testcase.ii:21028:5: warning: extended initializer lists only available with -std=3Dc++0x or -std=3Dgnu++0x [enabled by default] testcase.ii: In function =E2=80=98std::_Setw std::setw(int)=E2=80=99: testcase.ii:21046:5: warning: extended initializer lists only available with -std=3Dc++0x or -std=3Dgnu++0x [enabled by default] gcc: error: testcase.ii: -fcompare-debug failure (length) $ diff testcase.*gkd 24071c24071 < (call (mem:QI (symbol_ref:DI ("memmove") [flags 0x41] ) [ memmove S1 A8]) --- > (call (mem:QI (symbol_ref:DI ("memmove") [flags 0x41] ) [ __builtin_memmove S1 A8]) Reducing the testcase is very slow. I met this problem several times, but n= ever with a small testcase.