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 B2D293857821; Fri, 22 Oct 2021 11:22:39 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B2D293857821
From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/102897] New: [12 Regression]
 simplify_permutation ICEs on assert
Date: Fri, 22 Oct 2021 11:22:39 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: tnfchris 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
Message-ID: <bug-102897-4@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: Fri, 22 Oct 2021 11:22:39 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102897

            Bug ID: 102897
           Summary: [12 Regression] simplify_permutation ICEs on assert
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tnfchris at gcc dot gnu.org
  Target Milestone: ---

The following testcase

typedef __attribute__((vector_size(8))) signed char int8x8_t;
typedef __attribute__((vector_size(8))) unsigned char uint8x8_t;

int8x8_t fn1(int8x8_t val20, char tmp) {
  uint8x8_t __trans_tmp_3;
  __trans_tmp_3 =3D (uint8x8_t){tmp};
  int8x8_t __a =3D (int8x8_t)__trans_tmp_3;
  return __builtin_shuffle(__a, val20, (uint8x8_t){});
}

ICEs at -O1 and higher with

during GIMPLE pass: forwprop
<source>: In function 'fn1':
<source>:12:1: internal compiler error: in simplify_permutation, at
tree-ssa-forwprop.c:2271
   12 | }
      | ^
0x1000e00 simplify_permutation
        src/gcc/gcc/tree-ssa-forwprop.c:2271
0x1007ae8 execute
        src/gcc/gcc/tree-ssa-forwprop.c:3397

That line contains an assert with the comment

          tree op2_type =3D TREE_TYPE (op2);
          /* Should have folded this before.  */
          gcc_assert (op2_type !=3D tgt_type);=