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 6BEA93858C60; Thu,  9 Feb 2023 12:39:21 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6BEA93858C60
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1675946361;
	bh=L7fSjp2qL64PSWsLYCLusNrttUPQOdR2bVBZICzmWL0=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=Fs162PGim3y/5bJFFKtg/GU4/ZM4CtmeSgz0P7u+zNfdk5Ymr5njCPuN1aXBQrRSk
	 4hONaE4bfLqc4QXh82h53OPDeeS4EsH5OMI1ecSRLvmYlqzh6xTdgXKpBK/HvR5DMS
	 V1IYLRtrHb3TKePow5/+UTTgmcsvgB5Ep1UgJUuk=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/108741] [OpenMP] Wrong code for lastprivate with
 pointer iteration variable
Date: Thu, 09 Feb 2023 12:39:21 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub 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: 
Message-ID: <bug-108741-4-Dpdrg9Tc7x@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-108741-4@http.gcc.gnu.org/bugzilla/>
References: <bug-108741-4@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=3D108741

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
  #pragma omp simd collapse(2) lastprivate(a0,a1,j)
  for (a0 =3D 1; a0 <=3D 10; a0++)
    for (j =3D 1; j <=3D 20; j++)
      **a1 =3D a0;    /// Segfaults here as *a0 points to invalid memory
You mean *a1.  That testcase is invalid, when a1 is lastprivate, it's
privatized copy
is uninitialized at the start and a1 is assigned the last iteration's value=
.=