Broke swim interchange through aliasing

[Daniel Berlin]

On Sun, 2005-07-10 at 15:49 -0400, Daniel Berlin wrote:
> It looks like we are now giving type tags to global that didn't use to
> have type tags, and are *not* pointers.
> 

As a followup, it looks like alias grouping went crazy and turned on
here, when it didn't before.

It looks like we used to think for this testcase that we had 0 aliased
vops, and now we think we have 586
hmmmm.

:)