Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2004-04-05 11:13:01 -0700 (Mon, 05 Apr 2004)
Revision: 5599
Log message:
Added reserve as a special stage. The old-style reserve is still
around for constant-sized reserves. Have to figure out whether to
fold this in.
Also, added Core_def, so we can use definitions in our code.