vrp?

[David Edelsohn]

Richard> Any idea what the state of the last value-range propagation patch is?

Jeff> I think we had some minor differences in how we thought it ought to
Jeff> work, but nothing drastic.  Of course there were also the compile-time
Jeff> issues since I my recollection was that it was a traditional iterate
Jeff> iterate iterate until you reach a fixed point solution.  

	The RTL VRP is an interesting theoretical exercise, but not
properly designed for a commercial compiler, IMHO.

David