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 CBC2F3839824; Thu, 17 Jun 2021 05:59:40 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CBC2F3839824
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/101008] ICE: in native_encode_rtx, at
 simplify-rtx.c:6594 with -O -g
Date: Thu, 17 Jun 2021 05:59:40 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: FIXED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-101008-4-MfOTY2gLZt@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-101008-4@http.gcc.gnu.org/bugzilla/>
References: <bug-101008-4@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: Thu, 17 Jun 2021 05:59:40 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101008

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:8cd45af39ddc14fc77017a2d4c2aceb9a915ab4b

commit r11-8593-g8cd45af39ddc14fc77017a2d4c2aceb9a915ab4b
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Jun 11 12:59:43 2021 +0200

    simplify-rtx: Fix up simplify_logical_relational_operation for vector I=
OR
[PR101008]

    simplify_relational_operation callees typically return just const0_rtx
    or const_true_rtx and then simplify_relational_operation attempts to fix
    that up if the comparison result has vector mode, or floating mode,
    or punt if it has scalar mode and vector mode operands (it doesn't know=
 how
    exactly to deal with the scalar masks).
    But, simplify_logical_relational_operation has a special case, where
    it attempts to fold (x < y) | (x >=3D y) etc. and if it determines it is
    always true, it just returns const_true_rtx, without doing the dances t=
hat
    simplify_relational_operation does.
    That results in an ICE on the following testcase, where such folding
happens
    during expansion (of debug stmts into DEBUG_INSNs) and we ICE because
    all of sudden a VOIDmode rtx appears where it expects a vector (V4SImod=
e)
    rtx.

    The following patch fixes that by moving the adjustement into a separate
    helper routine and using it from both simplify_relational_operation and
    simplify_logical_relational_operation.

    2021-06-11  Jakub Jelinek  <jakub@redhat.com>

            PR rtl-optimization/101008
            * simplify-rtx.c (relational_result): New function.
            (simplify_logical_relational_operation,
            simplify_relational_operation): Use it.

    (cherry picked from commit 4bdcdd8fa8d7659e5a19a930cf2f0332127f8a46)=