--- a/python/ppci/codegen/graph.py	Wed Feb 19 22:32:15 2014 +0100
+++ b/python/ppci/codegen/graph.py	Thu Feb 20 20:04:52 2014 +0100
@@ -9,7 +9,7 @@
         self.edges = set()
         self.adj_map = {}
 
-    def addNode(self, n):
+    def add_node(self, n):
         self.nodes.add(n)
         if n not in self.adj_map:
             self.adj_map[n] = set()
@@ -77,8 +77,8 @@
         self.adj_map[n].add(m)
         self.adj_map[m].add(n)
 
-    def addNode(self, n):
-        super().addNode(n)
+    def add_node(self, n):
+        super().add_node(n)
         if n not in self.suc_map:
             self.suc_map[n] = set()
         if n not in self.pre_map:
@@ -102,3 +102,6 @@
     @property
     def Pred(self):
         return self.g.predecessors(self)
+
+    def __gt__(self, other):
+        return self in other.Succ