From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 3354F386F800; Wed, 20 May 2020 08:16:26 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3354F386F800
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1589962586;
 bh=3QNLZMr6KFtqhGaZFh+4KdL1Ad0gI8mFwhDD7VGDUVk=;
 h=From:To:Subject:Date:From;
 b=BnxX7xZXMqubBqAVhGcwGU7V8QG22rGqmsWsmi/jcHUVKbZGJuPgJQu2bho8ra8yM
 HJZpCgVroVLXgaySJ7ZW3PjhhmH3628kNO6dI3oFCwAb54ZgvCTm2tB+BJRsPLFTU4
 kIO0wzA5Yne3C4YZoONCDOGCIJhuVirJ3i7DnJPI=
From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/95229] New: ice in mark_jump_label_1
Date: Wed, 20 May 2020 08:16:26 +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: unknown
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dcb314 at hotmail dot com
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: <bug-95229-4@http.gcc.gnu.org/bugzilla/>
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-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 20 May 2020 08:16:26 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95229

            Bug ID: 95229
           Summary: ice in mark_jump_label_1
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For this C++ code:

struct a {
  unsigned long b;
  unsigned long c;
};
class {
public:
  a d;
} e;
struct f {
  unsigned g;
  unsigned h;
  int i();
};
int f::i() {
  e.d.b +=3D g;
  e.d.c +=3D h;
}

compiled with recent gcc trunk and compiler flag -O3 -march=3Dnative,
I get

$ /home/dcb/gcc/results/bin/gcc -c -O3 -march=3Dnative bug609.cc
bug609.cc: In member function =E2=80=98int f::i()=E2=80=99:
bug609.cc:17:1: warning: no return statement in function returning non-void
[-Wreturn-type]
   17 | }
      | ^
during RTL pass: expand
bug609.cc:17:1: internal compiler error: Segmentation fault
0xf4bbb9 crash_signal(int)
        ../../trunk.git/gcc/toplev.c:328
0xd5878a mark_jump_label_1(rtx_def*, rtx_insn*, bool, bool)
        ../../trunk.git/gcc/jump.c:1087
0xd588b0 mark_jump_label_1(rtx_def*, rtx_insn*, bool, bool)
        ../../trunk.git/gcc/jump.c:1211
0xd588b0 mark_jump_label_1(rtx_def*, rtx_insn*, bool, bool)
        ../../trunk.git/gcc/jump.c:1211

The bug first seems to occur on today's gcc. Yesterdays seems fine:

/home/dcb/gcc/results.20200519/bin/gcc
/home/dcb/gcc/results.20200520/bin/gcc
during RTL pass: expand
...

Native is x86_64, AMD FX(tm)-8350, Piledriver, bdver2.=