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154 commits

Author SHA1 Message Date
Bill Currie
da446fd343 Detect natural loops. 
Non-nested loops that have the same head-node are merged into one loop.
However, loop nesting is not currently detected (next step).
 2012-11-15 13:44:07 +09:00
Bill Currie
1fead50f4e Calculate the dominators of each node in the flow graph. 
The dominators are represented by sets using the node numbers.
 2012-11-15 13:44:07 +09:00
Bill Currie
7853bf1859 Calculate a node's successors and predecessors. 
The dot graphs are a little odd (arrow heads on the wrong end of the
predecessor edges), but things seem to be correct.
 2012-11-15 13:44:06 +09:00
Bill Currie
739ebc522c Begin working on flow analysis. 
For now, variable and flow graph node maps are built.
 2012-11-15 13:44:06 +09:00