bufferVarInit = new JVariableDefinition[1];
    public FilterFusionState(FlatNode fnode)    {	super(fnode);	filter = (SIRFilter)node.contents;	//two stage filters are currently only introduced by partitioning 	assert !(filter instanceof SIRTwoStageFilter);		assert node.ways <= 1 : "Filter FlatNode with more than one outgoing buffer";	    		bufferVar = new JVariableDefinition[1];	bufferVarInit = new JVariableDefinition[1];    }