More stats on new reg allocator

[Daniel Berlin <dan at www dot cgsoftware dot com>]

So i found some random code that generate spills with the old register
allocator  (rsne.c in libI77), and wanted to see how the new allocator
did.

Well, the stats are very encouraging.
(When i say spill, i mean reload couldn't avoid spilling it either, if
you count the ones reload puts back into registers, you have a lot
more spills)
While we spill at least once (usually at least 3-4 times) per procedure
with the
old allocator, we don't spill at all with the new one.
In fact, in the procedure with the most regs, x_rsne (72 regs need
allocating with -O2), we spill with the old allocator about 30 times, and
use 25 regs, with the new allocator, we don't spill, and use 14 regs.

Nice, eh?

(For those wondering how i testd to make sure it spills when
necessary, and spills the right stuff, i told the allocator it only
had 3 registers available)
--Dan