spec2000 regression

[Jason Merrill]

>>>>> "Jan" == Jan Hubicka <jh@suse.cz> writes:

> So remaining patch I can't analyze completely is yours to alias.c
> I've failed to find the corresponding email at gcc-patches mailing list
> (even when I believe I've went across it in the pass)

The subject line is "PATCH to get_alias_set".  There were two messages.

> so please can you double-check the patch and try to explain me what
> exactly it is shooting for?

It's trying to avoid recalculating the alias set for a variable.  I suppose
it could cause a performance regression if the initial alias set were
wrong, but I would expect that to cause other problems as well.

Jason