From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from [140.186.70.92] (port=48516 helo=eggs.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1Pjuiu-0003z1-Hl
	for qemu-devel@nongnu.org; Mon, 31 Jan 2011 09:27:21 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <christophe.lyon@st.com>) id 1Pjuit-0001GZ-3J
	for qemu-devel@nongnu.org; Mon, 31 Jan 2011 09:27:20 -0500
Received: from eu1sys200aog112.obsmtp.com ([207.126.144.133]:41337)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <christophe.lyon@st.com>) id 1Pjuis-0001Fb-SI
	for qemu-devel@nongnu.org; Mon, 31 Jan 2011 09:27:19 -0500
Message-ID: <4D46C6BA.1010208@st.com>
Date: Mon, 31 Jan 2011 15:27:06 +0100
From: Christophe Lyon <christophe.lyon@st.com>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH 1/8] target-arm: Fixes for several shift
	instructions: VRSHL, VRSHR, VRSHRN, VSHLL, VRSRA.
References: <1296229866-32011-1-git-send-email-christophe.lyon@st.com>
	<1296229866-32011-2-git-send-email-christophe.lyon@st.com>
	<20110131082050.GA4304@volta.aurel32.net> <4D468262.8020703@st.com>
	<20110131094414.GA7112@hall.aurel32.net>
In-Reply-To: <20110131094414.GA7112@hall.aurel32.net>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 8bit
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Aurelien Jarno <aurelien@aurel32.net>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

On 31.01.2011 10:44, Aurelien Jarno wrote:
> On Mon, Jan 31, 2011 at 10:35:30AM +0100, Christophe Lyon wrote:
>> On 31.01.2011 09:20, Aurelien Jarno wrote:
>>> On Fri, Jan 28, 2011 at 04:50:59PM +0100, christophe.lyon@st.com wrote:
>>>> From: Christophe Lyon <christophe.lyon@st.com>
>>>>
>>>> Handle corner cases where the addition of the rounding constant could
>>>> cause overflows.
>>>
>>> After applying this patch, I get the following gcc warning:
>>>   CC    translate.o
>>> cc1: warnings being treated as errors
>>> qemu/target-arm/translate.c: In function ‘disas_neon_data_insn’:
>>> qemu/target-arm/translate.c:4212: error: ‘imm’ may be used uninitialized in this function
>>> make: *** [translate.o] Error 1
>>>
>>
>> Which GCC version are you using? I don't have such a warning (using GCC-4.5.1 on x86_64).
>>
> 
> I get this error with GCC 4.3.5, GCC 4.4.5, GCC 4.5.2 and GCC 4.6.0 
> (r169270). This is also on x86_64.
> 

Well, I can't reproduce this error :-(
For the record, I configure with --target-list=arm-softmmu,arm-linux-user --disable-bluez --enable-debug --disable-sdl and point --host-cc and --cc to GCC-4.5.1.

In verbose mode, I confirm that GCC is invoked with
-Werror -m64 -Wstrict-prototypes -Wredundant-decls -Wall -Wundef -Wendif-labels -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fstack-protector-all -Wmissing-include-dirs -Wempty-body -Wnested-externs -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration -Wold-style-definition -Wtype-limits

I have tried from a freshly cloned qemu.git, and I have no error.
Can you send me your translate.c & translate.i (pre-processed by GCC's C-preprocesssor with -E option)

Christophe.