From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26981 invoked by alias); 30 Jul 2015 06:41:56 -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 Received: (qmail 26921 invoked by uid 48); 30 Jul 2015 06:41:52 -0000 From: "sebastian.huber@embedded-brains.de" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/67064] New: Register asm variable broken Date: Thu, 30 Jul 2015 06:41:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 6.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: sebastian.huber@embedded-brains.de X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-07/txt/msg02611.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D67064 Bug ID: 67064 Summary: Register asm variable broken Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: sebastian.huber@embedded-brains.de Target Milestone: --- The following test case fails on x86_64-pc-linux-gnu, powerpc-rtems, sparc-rtems: struct s { int i; }; register struct s *reg __asm__( "1" ); int f(void) { int i; i =3D reg->i; i =3D (reg)->i; return i; } Yields: prreg.cc:5:20: warning: call-clobbered register used for global register variable register struct s *reg __asm__( "1" ); ^ prreg.cc: In function =E2=80=98int f()=E2=80=99: prreg.cc:12:8: error: address of explicit register variable =E2=80=98reg=E2= =80=99 requested i =3D (reg)->i; ^ Please note, that the line 11 "i =3D reg->i;" works. >>From gcc-bugs-return-493722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jul 30 06:44:21 2015 Return-Path: Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 28553 invoked by alias); 30 Jul 2015 06:44:21 -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 Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 28406 invoked by uid 48); 30 Jul 2015 06:44:17 -0000 From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/67064] Register asm variable broken Date: Thu, 30 Jul 2015 06:44:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 6.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-07/txt/msg02612.txt.bz2 Content-length: 224 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67064 --- Comment #1 from Andrew Pinski --- C++11 rules about (x) have changed. If you use -std=gnu++98 you would get the same behavior as before.