Attribute zero_attr;
      if (element_type.isIntOrFloat())
        zero_attr = rewriter.getZeroAttr(type);
      else if (element_type.isa<TF::StringType>())
        zero_attr = DenseStringElementsAttr::get(type, {""});

      if (!zero_attr) return failure();

      auto zero_const = rewriter.create<TF::ConstOp>(op.getLoc(), zero_attr);
      ReplaceTfOpWithNewOp<TF::NotEqualOp>(rewriter, op, result_type,