IVGCVSW-2458 Refactor the Optimize function (Network.cpp) so that

subgraphs are optimized by the backends

 * Added a new method OptimizeSubGraph to the backend interface
 * Refactored the Optimize function so that the backend-specific
   optimization is performed by the backend itself (through the new
   OptimizeSubGraph interface method)
 * Added a new ApplyBackendOptimizations function to apply the new
   changes
 * Added some new convenient constructors to the SubGraph class
 * Added AddLayer method and a pointer to the parent graph to the
   SubGraph class
 * Updated the sub-graph unit tests to match the changes
 * Added SelectSubGraphs and ReplaceSubGraphConnections overloads
   that work with sub-graphs
 * Removed unused code and minor refactoring where necessary

Change-Id: I46181794c6a9e3b10558944f804e06a8f693a6d0

1 files changed, 0 insertions, 45 deletions

diff --git a/src/armnn/NetworkUtils.cpp b/src/armnn/NetworkUtils.cpp
index 735a6244d5..d0c36dd34f 100644
--- a/src/armnn/NetworkUtils.cpp
+++ b/src/armnn/NetworkUtils.cpp
@@ -111,49 +111,4 @@ std::vector<DebugLayer*> InsertDebugLayerAfter(Graph& graph, Layer& layer)
     return debugLayers;
 }
 
-PreCompiledLayer* CreatePreCompiledLayer(Graph& graph,
-                                         const SubGraph& subGraph,
-                                         unsigned int subGraphIndex,
-                                         const IBackendInternalUniquePtr& backendObjPtr)
-{
-    BOOST_ASSERT(backendObjPtr);
-
-    IBackendInternal::ISubGraphConverterPtr converter =
-            backendObjPtr->CreateSubGraphConverter(std::make_shared<SubGraph>(subGraph));
-    if (!converter)
-    {
-        return nullptr;
-    }
-
-    try
-    {
-        // Attempt to convert and compile sub-graph
-        auto preCompiledObject = converter->GetOutput();
-    }
-    catch (std::exception&)
-    {
-        return nullptr;
-    }
-
-    // Create pre-compiled layer
-    std::string name = "pre-compiled" + std::to_string(subGraphIndex);
-    PreCompiledLayer* preCompiledLayer = graph.AddLayer<PreCompiledLayer>(
-        PreCompiledDescriptor(subGraph.GetNumInputSlots(), subGraph.GetNumOutputSlots()), name.c_str());
-
-    // Copy output tensor infos from sub-graph
-    for (unsigned int i = 0u; i < subGraph.GetNumOutputSlots(); i++)
-    {
-        preCompiledLayer->GetOutputSlot(i).SetTensorInfo(subGraph.GetOutputSlot(i)->GetTensorInfo());
-    }
-
-    // Assign pre-compiled object to layer
-    preCompiledLayer->SetPreCompiledObject(converter->GetOutput());
-
-    // Set the backend-id for the pre-compiled layer
-    BackendId backendId = backendObjPtr->GetId();
-    preCompiledLayer->SetBackendId(backendId);
-
-    return preCompiledLayer;
-}
-
 } // namespace armnn