poolalloc and steensgaard

Dear llvm developers:

Just find that the steensgaard alias analysis pass is removed from the latest poolalloc lib.
So if i want to use this pass, can i use the Steensgaard source code from some previous version and compile it on the current poolalloc code base with some possible modifications?

Or are there any better alternatives?

Thanks,
Daniel.

Stepping up a level, what are you trying to achieve by using the Steensgaard AA code from pooalloc? Perhaps there is a better way to do what you need to do. Regards, John Criswell