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 2692D3858C50; Fri, 28 Apr 2023 15:09:43 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2692D3858C50
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1682694583;
	bh=dqKJHQlgimMPmB6mMwOFxgc8oloY6hFiavS+3T0g5ZA=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=M2BNTXKvHiqQztWfF1iR/uKUtdPee7nfinAf6v75jU+98fTj4oF89Uu2YON8Kd3Ok
	 7+cK8l8pI5qRwQNJXMI5RPXqt6k6U/iV07z4tq+1FLcN5nsKNvIL57C+St+0iya2X7
	 ZedqVb7ITohGuybAbSutduT0Iulm40mNqP7J7TMI=
From: "gjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109650] avr-gcc incorrect code with -Os
Date: Fri, 28 Apr 2023 15:09:42 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 12.2.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: gjl 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: cc attachments.created
Message-ID: <bug-109650-4-Y8LGErVtk5@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-109650-4@http.gcc.gnu.org/bugzilla/>
References: <bug-109650-4@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=3D109650

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

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

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
Created attachment 54953
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D54953&action=3Dedit
Full C test case that doesn't require hardware like UART.

This testcase tests against the code as generated by avr-gcc-8.5 -Os. It sh=
ould
work for all AVR devices including reduced tiny like ATtiny40, thus eligible
for

testsuite/gcc.target/avr/torture

Pairs that produce different results with avr-gcc v14 (current master). are:

p1,p2 =3D 3,6;  4,6;  5,4;  6,4  and  7,2.=