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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "MockBackend.hpp"
#include "MockBackendId.hpp"
#include <armnn/BackendRegistry.hpp>
#include <armnn/backends/IBackendContext.hpp>
#include <armnn/backends/IMemoryManager.hpp>
#include <Optimizer.hpp>
#include <SubgraphViewSelector.hpp>
#include <boost/cast.hpp>
#include <algorithm>
namespace
{
bool IsLayerSupported(const armnn::Layer* layer)
{
BOOST_ASSERT(layer != nullptr);
armnn::LayerType layerType = layer->GetType();
switch (layerType)
{
case armnn::LayerType::Input:
case armnn::LayerType::Output:
case armnn::LayerType::Addition:
case armnn::LayerType::Convolution2d:
// Layer supported
return true;
default:
// Layer unsupported
return false;
}
}
bool IsLayerSupported(const armnn::Layer& layer)
{
return IsLayerSupported(&layer);
}
bool IsLayerOptimizable(const armnn::Layer* layer)
{
BOOST_ASSERT(layer != nullptr);
// A Layer is not optimizable if its name contains "unoptimizable"
const std::string layerName(layer->GetName());
bool optimizable = layerName.find("unoptimizable") == std::string::npos;
return optimizable;
}
bool IsLayerOptimizable(const armnn::Layer& layer)
{
return IsLayerOptimizable(&layer);
}
} // Anonymous namespace
namespace armnn
{
namespace
{
static BackendRegistry::StaticRegistryInitializer g_RegisterHelper
{
BackendRegistryInstance(),
MockBackend::GetIdStatic(),
[]()
{
return IBackendInternalUniquePtr(new MockBackend);
}
};
}
const BackendId& MockBackend::GetIdStatic()
{
static const BackendId s_Id{MockBackendId()};
return s_Id;
}
IBackendInternal::IWorkloadFactoryPtr MockBackend::CreateWorkloadFactory(
const IBackendInternal::IMemoryManagerSharedPtr& /*memoryManager*/) const
{
return IWorkloadFactoryPtr{};
}
IBackendInternal::IBackendContextPtr MockBackend::CreateBackendContext(const IRuntime::CreationOptions&) const
{
return IBackendContextPtr{};
}
IBackendInternal::IBackendProfilingContextPtr MockBackend::CreateBackendProfilingContext(
const IRuntime::CreationOptions&, IBackendProfilingPtr&)
{
return IBackendProfilingContextPtr{};
}
IBackendInternal::IMemoryManagerUniquePtr MockBackend::CreateMemoryManager() const
{
return IMemoryManagerUniquePtr{};
}
IBackendInternal::Optimizations MockBackend::GetOptimizations() const
{
return Optimizations{};
}
IBackendInternal::ILayerSupportSharedPtr MockBackend::GetLayerSupport() const
{
static ILayerSupportSharedPtr layerSupport{new MockLayerSupport};
return layerSupport;
}
OptimizationViews MockBackend::OptimizeSubgraphView(const SubgraphView& subgraph) const
{
// Prepare the optimization views
OptimizationViews optimizationViews;
// Get the layers of the input sub-graph
const SubgraphView::Layers& subgraphLayers = subgraph.GetLayers();
// Parse the layers
SubgraphView::Layers supportedLayers;
SubgraphView::Layers unsupportedLayers;
SubgraphView::Layers untouchedLayers;
std::for_each(subgraphLayers.begin(),
subgraphLayers.end(),
[&](Layer* layer)
{
bool supported = IsLayerSupported(layer);
if (supported)
{
// Layer supported, check if it's optimizable
bool optimizable = IsLayerOptimizable(layer);
if (optimizable)
{
// Layer fully supported
supportedLayers.push_back(layer);
}
else
{
// Layer supported but not optimizable
untouchedLayers.push_back(layer);
}
}
else
{
// Layer unsupported
unsupportedLayers.push_back(layer);
}
});
// Check if there are supported layers
if (!supportedLayers.empty())
{
// Select the layers that are neither inputs or outputs, but that are optimizable
auto supportedSubgraphSelector = [](const Layer& layer)
{
return layer.GetType() != LayerType::Input &&
layer.GetType() != LayerType::Output &&
IsLayerSupported(layer) &&
IsLayerOptimizable(layer);
};
// Apply the subgraph selector to the supported layers to group them into sub-graphs were appropriate
SubgraphView mutableSubgraph(subgraph);
SubgraphViewSelector::Subgraphs supportedSubgraphs =
SubgraphViewSelector::SelectSubgraphs(mutableSubgraph, supportedSubgraphSelector);
// Create a substitution pair for each supported sub-graph
std::for_each(supportedSubgraphs.begin(),
supportedSubgraphs.end(),
[&optimizationViews](const SubgraphView::SubgraphViewPtr& supportedSubgraph)
{
BOOST_ASSERT(supportedSubgraph != nullptr);
PreCompiledLayer* preCompiledLayer =
optimizationViews.GetGraph().AddLayer<PreCompiledLayer>(
PreCompiledDescriptor(supportedSubgraph->GetNumInputSlots(),
supportedSubgraph->GetNumOutputSlots()),
"pre-compiled");
preCompiledLayer->SetBackendId(MockBackendId());
SubgraphView substitutionSubgraph(*supportedSubgraph);
SubgraphView replacementSubgraph(preCompiledLayer);
optimizationViews.AddSubstitution({ substitutionSubgraph, replacementSubgraph });
});
}
// Check if there are unsupported layers
if (!unsupportedLayers.empty())
{
// Select the layers that are neither inputs or outputs, and are not optimizable
auto unsupportedSubgraphSelector = [](const Layer& layer)
{
return layer.GetType() != LayerType::Input &&
layer.GetType() != LayerType::Output &&
!IsLayerSupported(layer);
};
// Apply the subgraph selector to the unsupported layers to group them into sub-graphs were appropriate
SubgraphView mutableSubgraph(subgraph);
SubgraphViewSelector::Subgraphs unsupportedSubgraphs =
SubgraphViewSelector::SelectSubgraphs(mutableSubgraph, unsupportedSubgraphSelector);
// Add each unsupported sub-graph to the list of failed sub-graphs in the optimizization views
std::for_each(unsupportedSubgraphs.begin(),
unsupportedSubgraphs.end(),
[&optimizationViews](const SubgraphView::SubgraphViewPtr& unsupportedSubgraph)
{
BOOST_ASSERT(unsupportedSubgraph != nullptr);
optimizationViews.AddFailedSubgraph(SubgraphView(*unsupportedSubgraph));
});
}
// Check if there are untouched layers
if (!untouchedLayers.empty())
{
// Select the layers that are neither inputs or outputs, that are supported but that and are not optimizable
auto untouchedSubgraphSelector = [](const Layer& layer)
{
return layer.GetType() != LayerType::Input &&
layer.GetType() != LayerType::Output &&
IsLayerSupported(layer) &&
!IsLayerOptimizable(layer);
};
// Apply the subgraph selector to the untouched layers to group them into sub-graphs were appropriate
SubgraphView mutableSubgraph(subgraph);
SubgraphViewSelector::Subgraphs untouchedSubgraphs =
SubgraphViewSelector::SelectSubgraphs(mutableSubgraph, untouchedSubgraphSelector);
// Add each untouched sub-graph to the list of untouched sub-graphs in the optimizization views
std::for_each(untouchedSubgraphs.begin(),
untouchedSubgraphs.end(),
[&optimizationViews](const SubgraphView::SubgraphViewPtr& untouchedSubgraph)
{
BOOST_ASSERT(untouchedSubgraph != nullptr);
optimizationViews.AddUntouchedSubgraph(SubgraphView(*untouchedSubgraph));
});
}
return optimizationViews;
}
} // namespace armnn
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