if (!s.ok()) {
              return;
            }
            node_map[n] = copy;
          }

          // Only handle input edges. Output edges will be added later as
          // its output nodes' input edges.
          for (auto e : n->in_edges()) {
            if (node_map.find(e->src()) == node_map.end()) {
              s = errors::Internal("Cannot find node image for ",

  return nodes;
}

// Returns a sorted vector of (src, dst) edges in 'graph'.
std::vector<std::pair<string, string>> GraphEdges(const Graph& graph) {
  std::vector<std::pair<string, string>> edges;
  for (const Edge* edge : graph.edges()) {
    if (edge->src()->IsSource() || edge->dst()->IsSink()) continue;
    edges.emplace_back(
        absl::StrCat(edge->src()->name(), ":", edge->src_output()),

    result.types.push_back(type);
  }

  // Surprisingly input edges can be nondeterministically ordered. This
  // particularly seems to be the case for the control edges between _SOURCE
  // and _SINK that the Graph constructor inserts. Copy the input edges and
  // sort the edges, but only the control edges, not data edges!
  // TODO(jmolloy): We should probably just ignore _SOURCE and _SINK nodes.

  // Populate the model control dependencies metadata entry.
  if (std::any_of(
          model_control_dependencies_.begin(),
          model_control_dependencies_.end(),
          [](const tflite::ControlEdges& edges) { return !edges.empty(); })) {
    metadata.push_back(
        BuildMetadata(tflite::kModelControlDependenciesMetadataKey,
                      tflite::SerializeModelControlDependencies(

		name           string
		graph          trustGraphDescription
		expectedChains []string
		expectedErr    string
	}{
		{
			// Build the following graph from RFC 4158, figure 7 (note that in this graph edges represent
			// certificates where the parent is the issuer and the child is the subject.) For the certificate
			// C->B, use an unsupported ExtKeyUsage (in this case ExtKeyUsageCodeSigning) which invalidates

//===----------------------------------------------------------------------===//

bool GeneratorDatasetRegionOp::areTypesCompatible(Type t1, Type t2) {
  return true;  // Don't enforce type checking across control-flow edges.
}

void GeneratorDatasetRegionOp::getRegionInvocationBounds(
    ArrayRef<Attribute> operands,
    SmallVectorImpl<InvocationBounds>& invocationBounds) {

  let constructor = "TFTPU::CreateTPUColocateSplitsPass()";
  let description = [{
    It is beneficial for performance to assign a `Split` op to the same device
    as its predecessor. This is because the weight of cut edges is always
    minimized when the `Split` is with its predecessor. This colocation
    constraint will be used by the placer graph optimization to assign a device
    to the op.

  invocationBounds.emplace_back(InvocationBounds::getUnknown());
}

bool WhileRegionOp::areTypesCompatible(Type t1, Type t2) {
  // For now, we don't enforce type checking across control-flow edges.
  return true;
}

//===----------------------------------------------------------------------===//
// WhileRegionOp canonicalization

    [HasParent<"mlir::func::FuncOp">, RecursiveMemoryEffects, SingleBlockImplicitTerminator<"YieldOp">]> {
  let summary = [{
    The `TFL.control_node` operation wraps single-block operations in order to attach control edges.
  }];

  let description = [{
    This is used to wrap regions and attach control dependencies to them. Typically,
    this will happen in one of the last steps before emitting the flatbuffer model

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// Gentlent, Inc. : https://www.gentlent.com
// Submitted by Tom Klein <******@****.***>
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gentlentapis.com
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// Ghost Foundation : https://ghost.org
// Submitted by Matt Hanley <******@****.***>
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// GignoSystemJapan: http://gsj.bz
// Submitted by GignoSystemJapan <******@****.***>