Check the visualizer

I have a nice prototype of the visualizing tools that I am coding. The code for the pass is here. It is practically done. The only thing that is missing is the liveness information for physical registers. I will try to fix this on the comming days. But it outputs nicely the liveness information for all the virtual registers. For a function like this one, it renders a dataflow graph like this. Hum... actually it only renders the dot description of the data flow graph. In order to see the graphic output, you must use something like Graphviz, that, by the way, is free.