Patch to allow Ada to work with tree-ssa

[Richard Henderson]

On Wed, Jun 23, 2004 at 04:15:08PM -0700, Mark Mitchell wrote:
> Adding a bit to a type node to say whether or not you need to do the 
> expensive check (iterating through the FIELD_DECLs) is surely not gated 
> by RTH's changes.  And, desirable no matter what you do eventually -- 
> knowing which types have this uncommon feature cannot but help.

Surely this walk is only applicable to some particular traversal of the
tree, and thus a bit is not needed at all.  Surely the one walk that
needs it can explicitly choose to iterate the fields simply by
recursively calling walk_tree.

Of course, he's not given any specifics whatsoever about what led him
to modify walk_tree.  Only that at some nebulous point he needed to see
the fields.



r~