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//
// Copyright © 2019 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "../TestUtils.hpp"
#include <Network.hpp>
#include <Optimizer.hpp>
#include <boost/test/unit_test.hpp>
using namespace armnn;
BOOST_AUTO_TEST_SUITE(Optimizer)
using namespace armnn::optimizations;
namespace
{
/// Shared function for the below tests, so that we test the same network in both cases.
INetworkPtr CreateTestNetwork()
{
// Create a network
INetworkPtr network = INetwork::Create();
auto input = network->AddInputLayer(0, "input");
const TensorInfo inputInfo({ 1, 2, 3, 4 }, DataType::Float32);
input->GetOutputSlot(0).SetTensorInfo(inputInfo);
// Insert Permute which swaps batches and channels dimensions
auto permute = network->AddPermuteLayer(PermuteDescriptor(PermutationVector{ 3, 1, 2, 0 }), "permute");
const TensorInfo permuteInfo({ 4, 2, 3, 1 }, DataType::Float32);
permute->GetOutputSlot(0).SetTensorInfo(permuteInfo);
input->GetOutputSlot(0).Connect(permute->GetInputSlot(0));
// Insert BatchToSpace
BatchToSpaceNdDescriptor batchToSpaceDesc;
batchToSpaceDesc.m_BlockShape = { 2, 2 };
batchToSpaceDesc.m_DataLayout = DataLayout::NHWC;
auto batchToSpace = network->AddBatchToSpaceNdLayer(batchToSpaceDesc, "batchToSpace");
const TensorInfo batchToSpaceInfo({ 1, 4, 6, 1 }, DataType::Float32);
batchToSpace->GetOutputSlot(0).SetTensorInfo(batchToSpaceInfo);
permute->GetOutputSlot(0).Connect(batchToSpace->GetInputSlot(0));
auto output = network->AddOutputLayer(0, "output");
batchToSpace->GetOutputSlot(0).Connect(output->GetInputSlot(0));
return network;
}
} // namespace
/// Tests that the optimization performed by PermuteAndBatchToSpaceAsDepthToSpace is as expected.
/// Note this does not ensure the correctness of the optimization - that is done in the below test.
BOOST_AUTO_TEST_CASE(PermuteAndBatchToSpaceAsDepthToSpaceOptimizerTest)
{
INetworkPtr network = CreateTestNetwork();
Graph graph = static_cast<Network*>(network.get())->GetGraph();
// Confirm initial graph is as we expect
BOOST_TEST(CheckSequence(graph.cbegin(), graph.cend(), &IsLayerOfType<InputLayer>, &IsLayerOfType<PermuteLayer>,
&IsLayerOfType<BatchToSpaceNdLayer>, &IsLayerOfType<OutputLayer>));
// Perform the optimization which should merge the two layers into a DepthToSpace
armnn::Optimizer::Pass(graph, MakeOptimizations(PermuteAndBatchToSpaceAsDepthToSpace()));
// Check that the replacement has been made as expected
auto checkDepthToSpace = [](const Layer* const layer) -> bool {
return IsLayerOfType<DepthToSpaceLayer>(layer) &&
static_cast<const DepthToSpaceLayer*>(layer)->GetParameters().m_BlockSize == 2 &&
static_cast<const DepthToSpaceLayer*>(layer)->GetParameters().m_DataLayout == DataLayout::NHWC &&
layer->GetOutputHandler().GetTensorInfo() == TensorInfo({ 1, 4, 6, 1 }, DataType::Float32);
};
BOOST_TEST(CheckSequence(graph.cbegin(), graph.cend(), &IsLayerOfType<InputLayer>, checkDepthToSpace,
&IsLayerOfType<OutputLayer>));
// Check the new layer has the two merged layers listed as related layers
std::list<std::string> testRelatedLayers = { "batchToSpace", "permute" };
BOOST_TEST(CheckRelatedLayers<DepthToSpaceLayer>(graph, testRelatedLayers));
}
// This unit test needs the reference backend, it's not available if the reference backend is not built
#if defined(ARMNNREF_ENABLED)
/// Tests that a optimization performed by PermuteAndBatchToSpaceAsDepthToSpace does not change the behaviour
/// of the network (i.e. it still produces the correct output).
BOOST_AUTO_TEST_CASE(PermuteAndBatchToSpaceAsDepthToSpaceCorrectnessTest)
{
INetworkPtr network = CreateTestNetwork();
IRuntimePtr runtime = IRuntime::Create(IRuntime::CreationOptions());
IOptimizedNetworkPtr optimizedNetwork = Optimize(*network, { Compute::CpuRef }, runtime->GetDeviceSpec());
// Confirm that the optimization has actually taken place
const Graph& optGraph = static_cast<OptimizedNetwork*>(optimizedNetwork.get())->GetGraph();
BOOST_TEST(CheckSequence(optGraph.cbegin(), optGraph.cend(), &IsLayerOfType<InputLayer>,
&IsLayerOfType<DepthToSpaceLayer>, &IsLayerOfType<OutputLayer>));
// Load the graph into a runtime so we can check it produces the correct output
NetworkId netId;
runtime->LoadNetwork(netId, std::move(optimizedNetwork));
std::vector<float> inputData{
// Each row here is a row of pixels where each pixel has 4 channels
// clang-format off
1.0f, 2.0f, 3.0f, 4.0f, 10.0f, 20.0f, 30.0f, 40.0f, 100.0f, 200.0f, 300.0f, 400.0f,
-1.0f, -2.0f, -3.0f, -4.0f, -10.0f, -20.0f, -30.0f, -40.0f, -100.0f, -200.0f, -300.0f, -400.0f,
// clang-format on
};
ConstTensor input(TensorInfo({ 1, 2, 3, 4 }, DataType::Float32), inputData);
InputTensors inputs = { { 0, input } };
std::vector<float> outputData(4 * 6);
Tensor output(TensorInfo({ 1, 4, 6, 1 }, DataType::Float32), outputData.data());
OutputTensors outputs = { { 0, output } };
runtime->EnqueueWorkload(netId, inputs, outputs);
// Check the output is as expected.
// Note this output has been generated by running the network *without* the optimization.
std::vector<float> expectedOutput = {
// Rows and columns here match exactly with the tensor, as there is only 1 channel.
// clang-format off
1.0f, 2.0f, 10.0f, 20.0f, 100.0f, 200.0f,
3.0f, 4.0f, 30.0f, 40.0f, 300.0f, 400.0f,
-1.0f, -2.0f, -10.0f, -20.0f, -100.0f, -200.0f,
-3.0f, -4.0f, -30.0f, -40.0f, -300.0f, -400.0f,
// clang-format on
};
BOOST_TEST(outputData == expectedOutput);
}
#endif
BOOST_AUTO_TEST_SUITE_END()
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