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 E5A473858D3C; Mon, 27 Dec 2021 09:15:41 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E5A473858D3C
From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/103842] New: [12 regression] ICE on ilmbase-2.5.7:
 during RTL pass: expand
Date: Mon, 27 Dec 2021 09:15:41 +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: 12.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: slyfox 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: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
 cf_gcctarget
Message-ID: <bug-103842-4@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: Mon, 27 Dec 2021 09:15:42 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103842

            Bug ID: 103842
           Summary: [12 regression] ICE on ilmbase-2.5.7: during RTL pass:
                    expand
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: slyfox at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

Noticed new ICE on this week's gcc snapshot on ilmbase-2.5.7. Here is minim=
ized
source:

    void abs(float *);
    struct Matrix33 {
      float x[3][3];
      float *operator[](int i) { return x[i]; }
      Matrix33();
      Matrix33(float f, float g) {
        x[1][0] =3D x[1][1] =3D x[1][2] =3D f;
        x[2][0] =3D g;
      }
      void equalWithAbsError();
      Matrix33 inverse() {
        Matrix33 s(x[1][2] - x[1][2], x[1][1] - x[1][1]);
        float r =3D s[2][0];
        if (r)
          for (int i =3D 0; i < 3; ++i)
            for (int j =3D 0; j < 3; ++j)
              s[i][j] /=3D r;
        for (int i =3D 0;;) {
          float *__trans_tmp_2 =3D s[i];
          abs(__trans_tmp_2);
        }
      }
    };
    void __assert_fail() {
      Matrix33 m, inv1 =3D m.inverse(), ident1 =3D inv1;
      ident1.equalWithAbsError();
    }

$ g++-12.0.0 -O3 -c bug.cpp.cpp
during RTL pass: expand
bug.cpp.cpp: In function 'void __assert_fail()':
bug.cpp.cpp:27:5: internal compiler error: Segmentation fault
   27 |     }
      |     ^
0x21196c6 internal_error(char const*, ...)
        ???:0

$ g++-12.0.0 -v
Using built-in specs.
COLLECT_GCC=3D/nix/store/hw64v14l9lzircg596kmj1bjiy76wcih-gcc-12.0.0/bin/g++
COLLECT_LTO_WRAPPER=3D/nix/store/hw64v14l9lzircg596kmj1bjiy76wcih-gcc-12.0.=
0/libexec/gcc/x86_64-unknown-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with:
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20211226 (experimental) (GCC)

Also attaching the unminimized preprocessed file in case it introduced
unrelated uninitialized values as `bug.cpp.cpp.orig`.=