Re: [Qemu-devel] [PATCH 1/8] target-arm: Fixes for several shift instructions: VRSHL, VRSHR, VRSHRN, VSHLL, VRSRA.

[Aurelien Jarno <aurelien@aurel32.net>]

Christophe Lyon a écrit :
> 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.
> 

It seems the problems come from here, if I add --enable-debug, I am not
able to reproduce the problem anymore. I don't understand why though.

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
aurelien@aurel32.net                 http://www.aurel32.net