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List:       cygwin-apps
Subject:    Re: 64bit: Possible optimizer bug in g++ 4.8.0 20130319
From:       Christian Franke <Christian.Franke () t-online ! de>
Date:       2013-03-26 19:54:47
Message-ID: 5151FD07.3060205 () t-online ! de
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Kai Tietz wrote:
> Hello,
>
> 2013/3/23 Corinna Vinschen schrieb:
>> Thanks for the testcase.  I'm not a gcc expert, so I defer to Kai.
>> Kai, can you have a look what happens here?
>>
>>
>> Thanks,
>> Corinna
> yes, this is a gcc bug.  it isn't sepcial to cygwin64.  It happens
> also for x64 mingw, so please file a regression-bug in gcc's bz.  I
> will take a closer look about its cause.  For me it looks like that
> unwinding-information doesn't reflect difference in stack-use here,
> but I will need to investigate in more detail.
>

Done. Likely a problem with -freorder-blocks and unwinding-info:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56747

Thanks,
Christian

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