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 EB28F3857C7D; Tue, 25 Aug 2020 10:59:21 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EB28F3857C7D
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1598353161;
 bh=NP7iVtC3v4XBdqWZYO6GYK/p4RIEjC4E/gvsUH6srT4=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=kilW+Ov7RydMrzwbIgmjpm76CBVmks/Bm+NFBGWUnnb2j7obs+pdVCh6HO2mVZUA5
 qMqE49rTG+EAXp1pvkqi2K5A3Ht3rXL1SpKiq9LUDzT+mmvcwsfBeVJpdWVrrkzl9k
 nN76VYsjf54YvT63TSbUnnIpkPyKFsjX2cFRPQVA=
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/96693] [11 Regression] GCC produces incorrect
 code with -O2 for loops
Date: Tue, 25 Aug 2020 10:59:21 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-96693-4-2x5y5PC47p@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96693-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96693-4@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: Tue, 25 Aug 2020 10:59:22 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96693

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
unsigned int var_4 =3D 140810747U;
bool var_7 =3D (bool)0;
unsigned char var_20 =3D (unsigned char)82;
unsigned short var_22 =3D 42;
long long int arr_9 [23] ;

void __attribute__((noipa)) test(unsigned a, bool b, long long p12[23])
{
  for (int c =3D 0; c < 2;) {
      if (b) {
          for (int d =3D 0; d < 4082; d +=3D 2)
            for (int e =3D 0; e < a; e =3D 2)
              var_20 =3D 0;
          var_22 =3D 0;
      }
      c =3D p12[c];
  }
}

int main()
{
  for (unsigned long i_0 =3D 0; i_0 < 23; ++i_0)
    arr_9 [i_0] =3D -722784397873599555LL;
  test(var_4, var_7, arr_9);
  if (var_22 !=3D 42)
    __builtin_abort ();
}=