APFloat cst_value = *cst.value_begin<APFloat>();

    // Affine op.
    Value filter = fc_op.getFilter();
    Value bias = fc_op.getBias();
    DenseFPElementsAttr filter_cst, bias_cst;
    if (!matchPattern(filter, m_Constant(&filter_cst))) {
      // The filter maybe quantized, then we should set it to the real constant.
      auto dq = llvm::dyn_cast_or_null<DequantizeOp>(filter.getDefiningOp());