Re: Pass specific annotation data for trees

[Daniel Berlin <dberlin at dberlin dot org>]

> If doing this, you have to be careful that a pass isn't called from
> within another pass. out-of-ssa can be called from within DOM, for
> instance, so dom and out-of-ssa can't have their pass info in a union.

Yes they can, they just have to have a substructure that is shared 
between them that is the first member, and part of the union :)

> This is the same situation we have with tree_nodes and all the
> bits/flags found therein.
yup yup

> Andrew