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 6B83B3858D1E; Mon, 27 Feb 2023 04:05:39 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6B83B3858D1E
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1677470739;
	bh=dLo0gFVlGlYhyhBGTlz4h9pdSVHViY69eEiuzYz+JO8=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=ssvjy+khRk9hJIGE+Pur2ho4QjGFqk99xY6+5SxUKXdBHi0we+x/0ZXpDjhq0KVUe
	 QLAitaBe0rsROIVnZwpMdDvolWBlMKCbzwrxfF6bqIpwOX3TO/w8mlTLTHWbjXsA0k
	 tNu2zRIUWg5rGrnaoivKY6xupyXyOO+GlnWMUnlI=
From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/108461] '-fcompare-debug' failure (length) w/
 -mcpu=e500mc -O2 -ftrapv -fno-expensive-optimizations
 -fno-guess-branch-probability -fno-tree-dce -fno-tree-dse
Date: Mon, 27 Feb 2023 04:05:38 +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: 13.0
X-Bugzilla-Keywords: compare-debug-failure
X-Bugzilla-Severity: normal
X-Bugzilla-Who: asolokha at gmx dot com
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: attachments.created
Message-ID: <bug-108461-4-598oiVPVda@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-108461-4@http.gcc.gnu.org/bugzilla/>
References: <bug-108461-4@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=3D108461

--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
Created attachment 54540
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D54540&action=3Dedit
gkd diff #2

I believe this simpler testcase demonstrates the same issue.

long long int m, n;

void
foo (void)
{
  if (m)
    m =3D 0;

  n =3D m =3D 0;
}

% powerpc-e300c3-linux-gnu-gcc-13 -mcpu=3D8540 -O2 -fcompare-debug
-fno-expensive-optimizations -fno-tree-dse -c fqrz27ap.c
powerpc-e300c3-linux-gnu-gcc-13: error: fqrz27ap.c: '-fcompare-debug' failu=
re
(length)=