toplevelSIR = new SIRPipeline("TopLevel" + globalID++);
toplevelSIR = new SIRPipeline("TopLevel" + globalID++ + suffix(top.contents));
    public FlatGraphToSIR(FlatNode top)     {        toplevel = top;        id = 0;        toplevelSIR = new SIRPipeline("TopLevel" + globalID++);        reSIR(toplevelSIR, toplevel, new HashSet<FlatNode>());    }