Patch to allow Ada to work with tree-ssa

[Richard Kenner]

    In fact I had a patch for tree-unnested to get rid of the impliciant
    uses for OFFSET, see
    <http://gcc.gnu.org/ml/gcc-patches/2004-05/msg00373.html> Which fixed
    the problem a different way.

We discussed this approach and I also mentioned it in my message of yesterday
morning.  The problem is that you are taking the address of things that are
not necessarily addressable.