control flow

 I am relatively a new user to sage. The manual says that control flow and
data dependence analysis primitives have not yet been implemented in Sage.

Has it been implemented as of now. Is there any way I can generate control 
flow graph or a petri net graph using Sage.

Thanks in advance.

Arun Muthukumar
Dept. of EE
University of Kentucky.				arunp@engr.uky.edu