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 93AFA3858001; Tue,  3 Nov 2020 02:08:01 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 93AFA3858001
From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/97684] New: [11 Regression] ICE in reg_preferred_class,
 at reginfo.c:789
Date: Tue, 03 Nov 2020 02:08:01 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: asolokha at gmx 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
 cf_gcctarget
Message-ID: <bug-97684-4@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: <https://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: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 03 Nov 2020 02:08:01 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97684

            Bug ID: 97684
           Summary: [11 Regression] ICE in reg_preferred_class, at
                    reginfo.c:789
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: powerpc-*-linux-gnu

gcc-11.0.0-alpha20201101 snapshot (g:590febb5f6624f78b36402a7c9a9c318978f1e=
fa)
ICEs when compiling the following testcase w/ -mcpu=3Dpower9 -O2
-flive-range-shrinkage -fselective-scheduling -fno-plt:

void
uc (void);

void
hb ()
{
  uc ();
  uc ();
  hb (0);
}

% powerpc-e300c3-linux-gnu-gcc-11.0.0 -mcpu=3Dpower9 -O2 -flive-range-shrin=
kage
-fselective-scheduling -fno-plt -c eij2zyqf.c
during RTL pass: ira
eij2zyqf.c: In function 'hb':
eij2zyqf.c:10:1: internal compiler error: in reg_preferred_class, at
reginfo.c:789
   10 | }
      | ^
0x677ffe reg_preferred_class(int)
=20=20=20=20=20=20=20
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20201101/wo=
rk/gcc-11-20201101/gcc/reginfo.c:789
0xbe27e4 update_equiv_regs
=20=20=20=20=20=20=20
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20201101/wo=
rk/gcc-11-20201101/gcc/ira.c:3516
0xbe92c2 ira
=20=20=20=20=20=20=20
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20201101/wo=
rk/gcc-11-20201101/gcc/ira.c:5498
0xbe92c2 execute
=20=20=20=20=20=20=20
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-11.0.0_alpha20201101/wo=
rk/gcc-11-20201101/gcc/ira.c:5861=