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Date: Wed, 03 Aug 2011 23:03:52 +0200
From: Stefan Weil <weil@mail.berlios.de>
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Subject: Re: [Qemu-devel] [PATCH v3 2/6] Add copy and constant propagation.
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To: Stefan Weil <weil@mail.berlios.de>
Cc: Blue Swirl <blauwirbel@gmail.com>, qemu-devel@nongnu.org, zhur@ispras.ru, Kirill Batuzov <batuzovk@ispras.ru>

Am 03.08.2011 22:56, schrieb Stefan Weil:
> Am 03.08.2011 22:20, schrieb Blue Swirl:
>> On Wed, Aug 3, 2011 at 7:00 PM, Stefan Weil <weil@mail.berlios.de> 
>> wrote:
>>> Am 07.07.2011 14:37, schrieb Kirill Batuzov:
>>>>
>>>> Make tcg_constant_folding do copy and constant propagation. It is a
>>>> preparational work before actual constant folding.
>>>>
>>>> Signed-off-by: Kirill Batuzov<batuzovk@ispras.ru>
>>>> ---
>>>>  tcg/optimize.c |  182
>>>> +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
>>>>  1 files changed, 180 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/tcg/optimize.c b/tcg/optimize.c
>>>> index c7c7da9..f8afe71 100644
>>>> --- a/tcg/optimize.c
>>>> +++ b/tcg/optimize.c
>>>>
>>>
>>> ...
>>>
>>> This patch breaks QEMU on 32 bit hosts (tested on 386 Linux
>>> and w32 hosts). Simply running qemu (BIOS only) terminates
>>> with abort(). As the error is easy to reproduce, I don't provide
>>> a stack frame here.
>>
>> I can't reproduce, i386/Linux and win32 versions of i386, Sparc32 and
>> Sparc64 emulators work fine.
>>
>> Maybe you have a stale build (bug in Makefile dependencies)?
>
> Sorry, an important information was wrong / missing in my report.
> It's not qemu, but qemu-system-x86_64 which fails to work.
>
> I just tested it once more with a new build:
>
> $ bin/x86_64-softmmu/qemu-system-x86_64 -L pc-bios
> /qemu/tcg/tcg.c:1646: tcg fatal error
> Abgebrochen
>
> Cheers,
> Stefan

qemu-system-mips64el fails with the same error, so the problem
occurs when running 64 bit emulations on 32 bit hosts.