if (!ancestor_of_replicate(operand.getParentRegion())) return false;

  // _TPUDeviceOrdinalPlaceholder implicitly depends on the replica.
  if (llvm::isa<TF::_TPUDeviceOrdinalPlaceholderOp>(op)) return false;

  bool has_replicate_operands = false;
  visitUsedValuesDefinedAbove(op->getRegions(), [&](OpOperand* operand) {
    if (!ancestor_of_replicate(operand->get().getParentRegion()))
      has_replicate_operands = true;
  });

    Value from = std::get<0>(p);
    // TODO(jingpu): move this to RegionUtils.h in MLIR core.
    for (auto& use : llvm::make_early_inc_range(from.getUses())) {
      if (launch_op_region->isAncestor(use.getOwner()->getParentRegion()))
        continue;
      use.set(std::get<1>(p));
    }
  }
}

// Get all escaped live-out values of a region.
void GetLiveOuts(Region* region, llvm::SmallVectorImpl<Value>* live_outs) {

      old_launch_op->GetBody().getTerminator()->getOperands().end());

  for (Value operand : tpu_copy_with_dynamic_shape_op->getOperands()) {
    if (GetOpOfValue(operand)->getParentRegion() ==
        tpu_copy_with_dynamic_shape_op->getParentRegion()) {
      new_launch_op_results.insert(operand);
    }
  }

  for (Value result : tpu_copy_with_dynamic_shape_op->getResults()) {
    new_launch_op_results.remove(result);

    if (auto assign = llvm::dyn_cast<TF::AssignVariableOp>(op)) {
      Value resource_var = assign.getResource();
      if (visited_resources.contains(resource_var) ||
          !resource_var.getParentRegion()->isProperAncestor(
              &replicate_op.getRegion()))
        continue;
      tail_assign_variable_ops.push_back(assign);
    }

    for (Value resource : op_accessed_resources)

      // Skip the folding logic if the block argument is not from the function
      // arguments. This can happen when the argument is from a while loop.
      if (block_arg.getParentRegion() != &func_op.getRegion()) {
        return false;
      }
      if (StringAttr attr = func_op.getArgAttrOfType<StringAttr>(
              block_arg.getArgNumber(), kTFDeviceAttr)) {
        return op_device == attr;

        for (Value operand : op->getOperands()) {
          Operation* operand_op = GetOpOfValue(operand);
          if (head_outside_compiled_ops.count(operand_op)) continue;

          if (operand_op->getParentRegion() == cluster_region)
            return WalkResult::interrupt();
        }
        return WalkResult::advance();
      });

      if (!walk_result.wasInterrupted())

        // Only mirrored args of ReplicateOp can be annotated.
        if (mirrored_replicate_args.count(block_arg.getArgNumber()) == 0) {
          continue;
        }
      } else if (!operand.getParentRegion()->isProperAncestor(
                     &replicate.getBody())) {
        // Not a replication-invariant operand.
        continue;
      }
      func.setArgAttr(entry.index(), kReplicationAttr,

              llvm::dyn_cast_or_null<tf_device::ParallelExecuteOp>(parent)) {
        int operand_idx = use->getOperandNumber();
        auto execute_results = execute.GetRegionOutputs(
            device_return->getParentRegion()->getRegionNumber());
        if (operand_idx >= execute_results.size()) return nullptr;

        auto result_from_use = execute_results[operand_idx];
        if (!result_from_use.hasOneUse()) return nullptr;

  Type expressed_type = value.getType();
  Type new_type = quant_params.castFromExpressedType(expressed_type);
  // This value isn't an expressed type (float), skip.
  if (!new_type) return;

  Block &block = value.getParentRegion()->front();
  Operation *op = value.getDefiningOp();
  if (op) {
    builder.setInsertionPoint(&block, ++Block::iterator(op));
  } else {
    builder.setInsertionPointToStart(&block);
  }