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Thu May 9 12:54:34 EDT 2013

Refactoring

Making a couple of changes.
1.  Loop vars are explicitly typed as Int
2.  First pass keeps the current loop stack.



What about this: perform the lifting in the first step, and perform
the optimization (re-using internals) in the second.

Hmmm... makes me doubt the whole auto-lifting approach again.


It seems simple in the abstract: introduce references.




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