Fix tree-optimization/20920

[Andrew Pinski]

On Apr 9, 2005, at 11:27 PM, Diego Novillo wrote:

> Sigh.  Another SSA_NAME flowing through EH edges getting in the
> way.
>
> I'm starting to think that it would be much better to make these
> SSA_NAME_OCCURS_IN_ABNORMAL_PHI into virtuals.  We would avoid
> all the monkeying around that optimizers have to do.  It would
> involve a bit of trickery because we only detect them when they
> first go into SSA form, but it's doable.  Comments from EH folks?
>
> Not committed yet.  Mainline is segfaulting somewhere in libjava
> with and without my patch.  Somewhere in final code generation.
> I still haven't looked hard.
>
> Could anyone with access to a darwin machine test this patch for
> me?

This fixes the bootstrap problem for me on powerpc-darwin.

Thanks,
Andrew Pinski