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 AAF453858C41; Wed, 17 Apr 2024 14:42:50 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AAF453858C41
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1713364970;
	bh=NwmtXlGP4Jm25lDzwT63hQIiEyNqiPMNyfdxNjfnXYA=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=Q1F6Dphv2JlGKdsDyiGihA5LDmJifH6jzDRVeG9PRGHfgC0bRlE6lih5ZwZ+n3Uao
	 Mrn4Qslt4Dj5Evl9UQaRml3WS5RAqPRoYh0GtsUHzZtsrHC/R5OhOrJKjqZTbnG5pn
	 4zv1lLsC6zTitx4ga/G5khG65FAJLqhuCqOOnGP8=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/114509] [11/12/13/14 Regression] an infinite loop or
 ICE with openmp after errors in some cases
Date: Wed, 17 Apr 2024 14:42:49 +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: 13.2.0
X-Bugzilla-Keywords: error-recovery, ice-checking, ice-on-invalid-code,
 openmp
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-114509-4-7uS6EwA3Hd@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-114509-4@http.gcc.gnu.org/bugzilla/>
References: <bug-114509-4@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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114509

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase:
void bar (void *);

void
foo (int x)
{
  struct S { int a[x]; int b; } s;
#pragma omp parallel for
  for (int i =3D 0; i < 10; i++)
    bar (&s);
}

We don't really support variable length structures/unions in OpenMP/OpenACC
lowering/expansion, and I don't see why we should spend time on that, varia=
ble
length structures/unions just shouldn't be used in C (they are already inva=
lid
in C++ and not present in Fortran either), I think that extension exists ju=
st
because Ada needs to support that.  Though Ada on the other side doesn't
support OpenMP/OpenACC.
So, I think we should just sorry if something attempts to privatize/map
variable length structure/union; making it shared should be fine.=