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 DA9053AA982D; Thu, 24 Jun 2021 10:22:58 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DA9053AA982D
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/101172] [11/12 Regression] ICE Segmentation fault
Date: Thu, 24 Jun 2021 10:22:58 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: error-recovery, ice-on-invalid-code
X-Bugzilla-Severity: minor
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.2
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-101172-4-dfI3R57ybt@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-101172-4@http.gcc.gnu.org/bugzilla/>
References: <bug-101172-4@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, 24 Jun 2021 10:22:59 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101172

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:65371066d8967560e3508af4a804e0ddb90acee7

commit r12-1771-g65371066d8967560e3508af4a804e0ddb90acee7
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Jun 24 12:22:14 2021 +0200

    stor-layout: Avoid DECL_BIT_FIELD_REPRESENTATIVE with NULL TREE_TYPE
[PR101172]

    finish_bitfield_representative has an early out if the field after a
    bitfield has error_mark_node type, but that early out leads to TREE_TYPE
    of the DECL_BIT_FIELD_REPRESENTATIVE being NULL, which breaks assumptio=
ns
    on code that uses the DECL_BIT_FIELD_REPRESENTATIVE during error-recove=
ry.

    The following patch instead sets TREE_TYPE of the representative to
    error_mark_node, something the users can deal with better.  At this poi=
nt
    the representative can be set as DECL_BIT_FIELD_REPRESENTATIVE for mult=
iple
    bitfields, so making sure that we clear the DECL_BIT_FIELD_REPRESENTATI=
VE
    instead would be harder (but doable, e.g. with the error_mark_node
TREE_TYPE
    set by this patch set some flag in the caller and if the flag is there,
walk
    all the fields once again and clear all DECL_BIT_FIELD_REPRESENTATIVE t=
hat
    have error_mark_node TREE_TYPE).

    2021-06-24  Jakub Jelinek  <jakub@redhat.com>

            PR middle-end/101172
            * stor-layout.c (finish_bitfield_representative): If nextf has
            error_mark_node type, set repr type to error_mark_node too.

            * gcc.dg/pr101172.c: New test.=