JLocalVariable var = (JLocalVariable)vars.get(popCount);
JLocalVariable var = (JLocalVariable)it.next();
		public Object visitPopExpression(SIRPopExpression oldSelf,						    CType oldTapeType) {		    // visit super		    SIRPopExpression self = 			(SIRPopExpression)			super.visitPopExpression(oldSelf, oldTapeType);		    		    // get the local var that we should be referencing		    JLocalVariable var = (JLocalVariable)vars.get(popCount);		    		    // increment the pop count		    popCount++;		    // make local var references instead of popping		    return new JLocalVariableExpression(null, var);		}