[tree-ssa] New g++/libstdc++ regressions with checking disabled.

[Jan Hubicka]

> 
> Incidentally, please do not commit any patches that do not fix these
> regressions.

I've been looking into it with Jason and it seems to be that culprint is
misscopmilation in cp/class.o (at least replacing it by unoptimized
version makes the bug to go away).
The symptom is that method table contains bogus duplicated overload
entries, so it seems to be somewhere in add_method.

HTH
Honza
> 
> 
> Thanks.  Diego.
>