wine, gcc and clang with CPUTYPE

[Dimitry Andric]

On 2012-10-24 09:57, Volodymyr Kostyrko wrote:
> I just have taken some time to inspect CPUTYPE support for clang. It
> seems to me that clang generates incorrect code in some cases.
>
> The first failure point I discovered was inability to build gcc from
> sources or compile something with gcc. Code produced by gcc seem to fail
> whether this was gcc compiled from bootstrap or anything else:
>
> http://lists.freebsd.org/pipermail/freebsd-multimedia/2012-October/013469.html

Can you attempt to figure out what the illegal instruction was, in that
case?


> I started testing by commenting out CPUTYPE in make.conf. After first
> rebuild I also updated the ports and installed new version of
> wine-devel. And to my surprise it works like a charm. Rolling back to
> the world built with CPUTYPE=native makes wine break again.
>
> To my surprise CPUTYPE was not the cause of wine failure per se. Wine
> continues to work for k6, k6-3, athlon and athlon-tbird. But it
> completely fails when the world was built with athlon-4 and athlon-xp.
>
> Trying to recompile gcc I also found that everything works and yet again
> up to the athlon-tbird.
>
> My conclusion is: clang incorrectly produces code within one of core
> libraries (I haven't tested which one yet, but I suspect libgcc_s.so)
> when optimizing for athlon-4 or athlon-xp.

On the problematic athlons, can you please post the exact CPUIDs from
dmesg?  If you have WITH_CLANG_EXTRAS enabled, please also post the
output of "opt -version".