--- a/python/ir/module.py	Fri Apr 19 12:42:21 2013 +0200
+++ b/python/ir/module.py	Fri Apr 19 19:22:52 2013 +0200
@@ -38,11 +38,11 @@
    def dumpgv(self, outf):
       outf.write('digraph G \n{\n')
       for f in self.Functions:
-         outf.write('{0} [label="{1}"]\n'.format(id(f), f))
+         outf.write('{0} [label="{1}" shape=box3d]\n'.format(id(f), f))
          for bb in f.BasicBlocks:
             contents = str(bb) + '\n'
             contents += '\n'.join([str(i) for i in bb.Instructions])
-            outf.write('{0} [label="{1}"];\n'.format(id(bb), contents))
+            outf.write('{0} [shape=note label="{1}"];\n'.format(id(bb), contents))
             for successor in bb.Successors:
                outf.write('"{0}" -> "{1}"\n'.format(id(bb), id(successor)))
          outf.write('"{0}" -> "{1}" [label="entry"]\n'.format(id(f), id(f.entry)))
@@ -55,5 +55,5 @@
          for t in i.defs:
             assert type(t) is Value, "def must be Value, not {0}".format(type(t))
          for t in i.uses:
-            assert type(t) is Value, "use must be Value, not {0}".format(type(t))
+            assert type(t) is Use, "use must be Value, not {0}".format(type(t))