if (quantizing_op->getNumRegions() != 0) {
        for (const auto& indexed_regions :
             llvm::enumerate(quantizing_op->getRegions())) {
          Region& target_region =
              quantized_op->getRegion(indexed_regions.index());
          IRMapping mapping;
          indexed_regions.value().cloneInto(&target_region, mapping);
        }
      }
      for (auto output : outputs_replaced) {