Any plan for rewriting loop.c using cfgloop.c

[Richard Kenner]

    Rest of loop optimizer is going to be more dificult as many of
    transformations are better done on higher level IL than RTL is 

I will take this opportunity to state again that I *strongly* disagree
with that statement.  Many of the transformation can't be done until
the RTL level because knowing what to do requires detailed knowlege
of the available instructions.