getEOGPathEdges
Function returns two lists in a list. The first list contains all eog nodes with no predecessor in the subgraph with root 'n'. The second list contains eog edges that have no successor in the subgraph with root 'n'. The first List marks the entry and the second marks the exit nodes of the cfg in this subgraph.
Return
Two lists, list 1 contains all eog entries and list 2 contains all exits.
Parameters
n
root of the subgraph.