I need to look at the CFG of a loop during debugging. However the
containing function is very large, so it is rather difficult to use the
CFG of the complete function. I tried using the ViewGraph method, but
the compiler kept complaining about undefined symbols related to
DOTGraphTraits. Is there any example that I could look at to find out,
what exactly I need to call something like
ViewGraph(loop, "CFG") ?