Method OptimizeSubgraphView

src/backends/cl/ClBackend.cpp:292–729

}

OptimizationViews ClBackend::OptimizeSubgraphView(const SubgraphView& subgraph,
                                                  const ModelOptions& modelOptions) const
{
    OptimizationViews optimizationViews(modelOptions);

    auto it = subgraph.end();
    bool isFastMathEnabled = false;
    std::map<LayerGuid, Layer*> untouched;

    while (it != subgraph.begin())
    {
        --it;
        Layer& base = *(PolymorphicDowncast<Layer*>(*it));
        untouched.insert({base.GetGuid(), &base});
    }

    it = subgraph.end();
#if defined(ARMCOMPUTECL_ENABLED)
    IBackendInternal::IBackendSpecificModelContextPtr modelContextPtr = CreateBackendSpecificModelContext(modelOptions);

    if (modelContextPtr)
    {
        auto clModelOptions = dynamic_cast<ClBackendModelContext*>(modelContextPtr.get());
        if (clModelOptions)
        {
            isFastMathEnabled = clModelOptions->IsFastMathEnabled();
        }
    }
#endif
    while (it != subgraph.begin())
    {
        --it;
        Layer& base = *(PolymorphicDowncast<Layer*>(*it));

        // Fuse activation into previous layer if supported by backend
        if ((base.GetType() == LayerType::DepthwiseConvolution2d || base.GetType() == LayerType::Convolution2d
            || base.GetType() == LayerType::BatchNormalization || base.GetType() == LayerType::FullyConnected
            || base.GetType() == LayerType::Addition || base.GetType() == LayerType::Multiplication
            || base.GetType() == LayerType::Subtraction || base.GetType() == LayerType::Division
            || base.GetType() == LayerType::ElementwiseBinary)
            && (base.GetAdditionalInformation<ActivationDescriptor>() == nullptr))
        {
            for (auto output = base.BeginOutputSlots(); output != base.EndOutputSlots(); ++output)
            {
                if (output->GetNumConnections() == 1)
                {
                    for (auto&& childInput : output->GetConnections())
                    {
                        if ((childInput->GetOwningLayer().GetType() == LayerType::Activation) &&
                            (checkDataTypeInputandOutput(childInput->GetOwningLayer())))
                        {
                            Layer& child = childInput->GetOwningLayer();

                            auto* activationLayer = PolymorphicDowncast<ActivationLayer*>(&child);
                            // Before we proceed make sure that this activation layer is in the subgraph. It could be
                            // the first layer in the next subgraph.
                            if (untouched.find(activationLayer->GetGuid()) == untouched.end())
                            {