// Use mhlo.Constant when it is consumed by the lowering passes since they
      // can't lower tf.Const.
      Value cst;
      if (use_mhlo_const) {
        cst = builder.create<mhlo::ConstantOp>(func_op->getLoc(), attrs);
      } else {
        cst = builder.create<TF::ConstOp>(func_op->getLoc(), attrs);
      }
      func_op.getArgument(i).replaceAllUsesWith(cst);
    }
    return module_op;
  }

            DenseFPElementsAttr attr;
            if (!matchPattern(q.getOperand(), m_Constant(&attr))) {
              continue;
            }
            auto cst = rewriter.create<arith::ConstantOp>(
                quantized_op->getLoc(), attr);
            quantizing_op->setOperand(i, cst.getResult());
          }
        }

        for (int i = 0, e = quantized_op->getNumResults(); i < e; ++i) {