No basic improvements branch for 3.5 - work on tree-ssa

[Richard Kenner]

    I would expect that the GCC problems I refer to hurt performance of all
    languages that use struct/record types.

    Other languages will benefit from tree-ssa even more, and front ends will
    be easier to write.

Nobody is trying to argue that it isn't worthwhile to persue, just
that the statement that nothing else is important enough to justify a
3.5 seems extreme.