if (f.getPeekInt() != f.getPopInt()) { return true; }
if (f.getPeekInt() != f.getPopEstimate()) { return true; }
    static public boolean needsModularBuffer (int src, int dst) {        if (! KjcOptions.modfusion) { return false; }        SIROperator dst_oper = NodeEnumerator.getOperator(dst);        if (dst_oper instanceof SIRFilter) {            SIRFilter f = (SIRFilter)dst_oper;            if (f.getPeekInt() != f.getPopInt()) { return true; }        }        return false;    }