[GCC 4.2 Project] Omega data dependence test

[Sebastian Pop]

Daniel Berlin wrote:
> 
> Sebastian,  I really think you are worrying too much.

right.

> It's pretty rare that it will take going all the way to omega to be able
> to disambiguate two dependences.
> 

for dependence tests we exercise only a limited part of omega, but now
suppose that we'll use omega for other purposes, for example cache
miss equations, scheduling, regalloc, etc.  One of these users will
sooner or later end by triggering the exponential bullet.