Revert "IVGCVSW-2056 + IVGCVSW-2064 : move ClContextControl to the ClBackend"

This reverts commit d4dfa684941a21314b70593d01b0fc2167eebad4.

Change-Id: Id61ce69215505c3cf5d30ec2a7ec9127fb2554fc
diff --git a/src/backends/backendsCommon/BackendContextRegistry.cpp b/src/backends/backendsCommon/BackendContextRegistry.cpp
deleted file mode 100644
index 0168a12..0000000
--- a/src/backends/backendsCommon/BackendContextRegistry.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-//
-// Copyright © 2017 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-
-#include "BackendContextRegistry.hpp"
-
-namespace armnn
-{
-
-BackendContextRegistry& BackendContextRegistryInstance()
-{
-    static BackendContextRegistry instance;
-    return instance;
-}
-
-} // namespace armnn
diff --git a/src/backends/backendsCommon/BackendContextRegistry.hpp b/src/backends/backendsCommon/BackendContextRegistry.hpp
deleted file mode 100644
index 23830a0..0000000
--- a/src/backends/backendsCommon/BackendContextRegistry.hpp
+++ /dev/null
@@ -1,28 +0,0 @@
-//
-// Copyright © 2017 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-#pragma once
-
-#include "IBackendContext.hpp"
-#include "RegistryCommon.hpp"
-
-#include <armnn/IRuntime.hpp>
-#include <armnn/Types.hpp>
-
-namespace armnn
-{
-
-using BackendContextRegistry = RegistryCommon<IBackendContext,
-                                              IBackendContextUniquePtr,
-                                              IRuntime::CreationOptions>;
-
-BackendContextRegistry& BackendContextRegistryInstance();
-
-template <>
-struct RegisteredTypeName<IBackendContext>
-{
-    static const char * Name() { return "IBackendContext"; }
-};
-
-} // namespace armnn
diff --git a/src/backends/backendsCommon/BackendRegistry.hpp b/src/backends/backendsCommon/BackendRegistry.hpp
index ba2d26a..145da88 100644
--- a/src/backends/backendsCommon/BackendRegistry.hpp
+++ b/src/backends/backendsCommon/BackendRegistry.hpp
@@ -12,9 +12,7 @@
 namespace armnn
 {
 
-using BackendRegistry = RegistryCommon<IBackendInternal,
-                                       IBackendInternalUniquePtr,
-                                       EmptyInitializer>;
+using BackendRegistry = RegistryCommon<IBackendInternal, IBackendInternalUniquePtr>;
 
 BackendRegistry& BackendRegistryInstance();
 
diff --git a/src/backends/backendsCommon/CMakeLists.txt b/src/backends/backendsCommon/CMakeLists.txt
index cb89aeb..9dd9b92 100644
--- a/src/backends/backendsCommon/CMakeLists.txt
+++ b/src/backends/backendsCommon/CMakeLists.txt
@@ -4,14 +4,11 @@
 #
 
 list(APPEND armnnBackendsCommon_sources
-    BackendContextRegistry.cpp
-    BackendContextRegistry.hpp
     BackendRegistry.cpp
     BackendRegistry.hpp
     CpuTensorHandle.cpp
     CpuTensorHandleFwd.hpp
     CpuTensorHandle.hpp
-    IBackendContext.hpp
     IBackendInternal.hpp
     ILayerSupport.cpp
     ITensorHandle.hpp
diff --git a/src/backends/backendsCommon/IBackendContext.hpp b/src/backends/backendsCommon/IBackendContext.hpp
deleted file mode 100644
index d073d12..0000000
--- a/src/backends/backendsCommon/IBackendContext.hpp
+++ /dev/null
@@ -1,27 +0,0 @@
-//
-// Copyright © 2017 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-#pragma once
-
-#include <armnn/IRuntime.hpp>
-#include <memory>
-
-namespace armnn
-{
-
-class IBackendContext
-{
-public:
-    virtual ~IBackendContext() {}
-
-protected:
-    IBackendContext(const IRuntime::CreationOptions& options) {}
-
-private:
-    IBackendContext() = delete;
-};
-
-using IBackendContextUniquePtr = std::unique_ptr<IBackendContext>;
-
-} // namespace armnn
diff --git a/src/backends/backendsCommon/IBackendInternal.hpp b/src/backends/backendsCommon/IBackendInternal.hpp
index a24b600..7e44dbd 100644
--- a/src/backends/backendsCommon/IBackendInternal.hpp
+++ b/src/backends/backendsCommon/IBackendInternal.hpp
@@ -4,8 +4,7 @@
 //
 #pragma once
 
-#include <armnn/IBackend.hpp>
-#include <memory>
+#include <armnn/Types.hpp>
 
 namespace armnn
 {
@@ -14,6 +13,8 @@
 class IBackendInternal : public IBackend
 {
 protected:
+    // Creation must be done through a specific
+    // backend interface.
     IBackendInternal() = default;
 
 public:
diff --git a/src/backends/backendsCommon/LayerSupportRegistry.hpp b/src/backends/backendsCommon/LayerSupportRegistry.hpp
index 6124685..a5efad0 100644
--- a/src/backends/backendsCommon/LayerSupportRegistry.hpp
+++ b/src/backends/backendsCommon/LayerSupportRegistry.hpp
@@ -6,13 +6,11 @@
 
 #include "RegistryCommon.hpp"
 #include <armnn/ILayerSupport.hpp>
-#include <armnn/Types.hpp>
 
 namespace armnn
 {
-using LayerSupportRegistry = RegistryCommon<ILayerSupport,
-                                            ILayerSupportSharedPtr,
-                                            EmptyInitializer>;
+
+using LayerSupportRegistry = RegistryCommon<ILayerSupport, ILayerSupportSharedPtr>;
 
 LayerSupportRegistry& LayerSupportRegistryInstance();
 
diff --git a/src/backends/backendsCommon/RegistryCommon.hpp b/src/backends/backendsCommon/RegistryCommon.hpp
index 3dbfad2..03bd338 100644
--- a/src/backends/backendsCommon/RegistryCommon.hpp
+++ b/src/backends/backendsCommon/RegistryCommon.hpp
@@ -22,11 +22,11 @@
     static const char * Name() { return "UNKNOWN"; }
 };
 
-template <typename RegisteredType, typename PointerType, typename ParamType>
+template <typename RegisteredType, typename PointerType>
 class RegistryCommon
 {
 public:
-    using FactoryFunction = std::function<PointerType(const ParamType&)>;
+    using FactoryFunction = std::function<PointerType()>;
 
     void Register(const BackendId& id, FactoryFunction factory)
     {
@@ -53,20 +53,6 @@
         return it->second;
     }
 
-    FactoryFunction GetFactory(const BackendId& id,
-                               FactoryFunction defaultFactory) const
-    {
-        auto it = m_Factories.find(id);
-        if (it == m_Factories.end())
-        {
-            return defaultFactory;
-        }
-        else
-        {
-            return it->second;
-        }
-    }
-
     size_t Size() const
     {
         return m_Factories.size();
@@ -131,4 +117,4 @@
     }
 };
 
-} // namespace armnn
\ No newline at end of file
+} // namespace armnn
diff --git a/src/backends/backendsCommon/WorkloadFactory.cpp b/src/backends/backendsCommon/WorkloadFactory.cpp
index 83a20e8..9f97452 100644
--- a/src/backends/backendsCommon/WorkloadFactory.cpp
+++ b/src/backends/backendsCommon/WorkloadFactory.cpp
@@ -68,7 +68,7 @@
 
     auto const& layerSupportRegistry = LayerSupportRegistryInstance();
     auto layerSupportFactory = layerSupportRegistry.GetFactory(backendId);
-    auto layerSupportObject = layerSupportFactory(EmptyInitializer());
+    auto layerSupportObject = layerSupportFactory();
 
     switch(layer.GetType())
     {
diff --git a/src/backends/backendsCommon/common.mk b/src/backends/backendsCommon/common.mk
index 152ada3..b1583b9 100644
--- a/src/backends/backendsCommon/common.mk
+++ b/src/backends/backendsCommon/common.mk
@@ -8,7 +8,6 @@
 # file in the root of ArmNN
 
 COMMON_SOURCES := \
-    BackendContextRegistry.cpp \
     BackendRegistry.cpp \
     CpuTensorHandle.cpp \
     ILayerSupport.cpp \
@@ -27,4 +26,3 @@
     test/WorkloadDataValidation.cpp \
     test/TensorCopyUtils.cpp \
     test/LayerTests.cpp
-
diff --git a/src/backends/backendsCommon/test/BackendRegistryTests.cpp b/src/backends/backendsCommon/test/BackendRegistryTests.cpp
index 4afe273..0bc655b 100644
--- a/src/backends/backendsCommon/test/BackendRegistryTests.cpp
+++ b/src/backends/backendsCommon/test/BackendRegistryTests.cpp
@@ -54,7 +54,7 @@
     StaticRegistryInitializer<BackendRegistry> factoryHelper(
         BackendRegistryInstance(),
         "HelloWorld",
-        [&called](const EmptyInitializer&)
+        [&called]()
         {
             called = true;
             return armnn::IBackendInternalUniquePtr(nullptr);
@@ -69,7 +69,7 @@
     // sanity check: the factory still not called
     BOOST_TEST(called == false);
 
-    factoryFunction(EmptyInitializer());
+    factoryFunction();
     BOOST_TEST(called == true);
 }
 
@@ -81,7 +81,7 @@
     bool called = false;
     BackendRegistryInstance().Register(
         "HelloWorld",
-        [&called](const EmptyInitializer&)
+        [&called]()
         {
             called = true;
             return armnn::IBackendInternalUniquePtr(nullptr);
@@ -96,7 +96,7 @@
     // sanity check: the factory still not called
     BOOST_TEST(called == false);
 
-    factoryFunction(EmptyInitializer());
+    factoryFunction();
     BOOST_TEST(called == true);
 }
 
diff --git a/src/backends/cl/CMakeLists.txt b/src/backends/cl/CMakeLists.txt
index 3025458..d751854 100644
--- a/src/backends/cl/CMakeLists.txt
+++ b/src/backends/cl/CMakeLists.txt
@@ -3,23 +3,18 @@
 # SPDX-License-Identifier: MIT
 #
 
-list(APPEND armnnClBackend_sources
-    ClBackendId.hpp
-    ClLayerSupport.cpp
-    ClLayerSupport.hpp
-    ClWorkloadFactory.cpp
-    ClWorkloadFactory.hpp
-)
-
 if(ARMCOMPUTECL)
     list(APPEND armnnClBackend_sources
-        ClBackendContext.cpp
-        ClBackendContext.hpp
         ClBackend.cpp
         ClBackend.hpp
+        ClBackendId.hpp
         ClContextControl.cpp
         ClContextControl.hpp
+        ClLayerSupport.cpp
+        ClLayerSupport.hpp
         ClTensorHandle.hpp
+        ClWorkloadFactory.cpp
+        ClWorkloadFactory.hpp
         OpenClTimer.cpp
         OpenClTimer.hpp
     )
@@ -29,10 +24,20 @@
     if(BUILD_UNIT_TESTS)
         add_subdirectory(test)
     endif()
+
+else()
+    list(APPEND armnnClBackend_sources
+        ClBackendId.hpp
+        ClContextControl.cpp
+        ClContextControl.hpp
+        ClLayerSupport.cpp
+        ClLayerSupport.hpp
+        ClWorkloadFactory.cpp
+        ClWorkloadFactory.hpp
+    )
 endif()
 
 add_library(armnnClBackend OBJECT ${armnnClBackend_sources})
 target_include_directories(armnnClBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnn)
 target_include_directories(armnnClBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnnUtils)
 target_include_directories(armnnClBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/backends)
-
diff --git a/src/backends/cl/ClBackend.cpp b/src/backends/cl/ClBackend.cpp
index 5d5cad5..b1857a3 100644
--- a/src/backends/cl/ClBackend.cpp
+++ b/src/backends/cl/ClBackend.cpp
@@ -8,7 +8,6 @@
 #include "ClWorkloadFactory.hpp"
 
 #include <backendsCommon/BackendRegistry.hpp>
-#include <boost/log/trivial.hpp>
 
 namespace armnn
 {
@@ -20,13 +19,13 @@
 {
     BackendRegistryInstance(),
     ClBackend::GetIdStatic(),
-    [](const EmptyInitializer&)
+    []()
     {
         return IBackendInternalUniquePtr(new ClBackend);
     }
 };
 
-} // anonymous namespace
+}
 
 const BackendId& ClBackend::GetIdStatic()
 {
@@ -39,4 +38,4 @@
     return std::make_unique<ClWorkloadFactory>();
 }
 
-} // namespace armnn
\ No newline at end of file
+} // namespace armnn
diff --git a/src/backends/cl/ClBackend.hpp b/src/backends/cl/ClBackend.hpp
index 381d808..223aeb3 100644
--- a/src/backends/cl/ClBackend.hpp
+++ b/src/backends/cl/ClBackend.hpp
@@ -12,8 +12,8 @@
 class ClBackend : public IBackendInternal
 {
 public:
-    ClBackend() = default;
-    ~ClBackend() override = default;
+    ClBackend()  = default;
+    ~ClBackend() = default;
 
     static const BackendId& GetIdStatic();
     const BackendId& GetId() const override { return GetIdStatic(); }
diff --git a/src/backends/cl/ClBackendContext.cpp b/src/backends/cl/ClBackendContext.cpp
deleted file mode 100644
index 7789415..0000000
--- a/src/backends/cl/ClBackendContext.cpp
+++ /dev/null
@@ -1,111 +0,0 @@
-//
-// Copyright © 2017 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-
-#include "ClBackendContext.hpp"
-#include "ClBackendId.hpp"
-#include "ClContextControl.hpp"
-
-#include <backendsCommon/BackendContextRegistry.hpp>
-#include <boost/log/trivial.hpp>
-
-#include <mutex>
-
-#ifdef ARMCOMPUTECL_ENABLED
-// Needed for the CL scheduler calls
-#include <arm_compute/core/CL/OpenCL.h>
-#include <arm_compute/core/CL/CLKernelLibrary.h>
-#include <arm_compute/runtime/CL/CLScheduler.h>
-#endif
-
-namespace armnn
-{
-
-namespace
-{
-
-static StaticRegistryInitializer<BackendContextRegistry> g_RegisterHelper
-{
-    BackendContextRegistryInstance(),
-    ClBackendId(),
-    [](const IRuntime::CreationOptions& options)
-    {
-        return IBackendContextUniquePtr(new ClBackendContext{options});
-    }
-};
-
-static std::mutex g_ContextControlMutex;
-
-std::shared_ptr<ClBackendContext::ContextControlWrapper>
-GetContextControlWrapper(const IRuntime::CreationOptions& options)
-{
-    static std::weak_ptr<ClBackendContext::ContextControlWrapper> contextControlWrapper;
-
-    std::lock_guard<std::mutex> lockGuard(g_ContextControlMutex);
-    std::shared_ptr<ClBackendContext::ContextControlWrapper> result;
-
-    if (contextControlWrapper.expired())
-    {
-        result = std::make_shared<ClBackendContext::ContextControlWrapper>(options);
-        contextControlWrapper = result;
-    }
-    else
-    {
-        result = contextControlWrapper.lock();
-    }
-
-    return result;
-}
-
-} // anonymous namespace
-
-
-#ifdef ARMCOMPUTECL_ENABLED
-struct ClBackendContext::ContextControlWrapper
-{
-    ContextControlWrapper(const IRuntime::CreationOptions& options)
-    : m_ClContextControl{options.m_GpuAccTunedParameters.get(),
-                         options.m_EnableGpuProfiling}
-    {
-    }
-
-    ~ContextControlWrapper()
-    {
-        if (arm_compute::CLScheduler::get().context()() != NULL)
-        {
-            // Waits for all queued CL requests to finish before unloading the network they may be using.
-            try
-            {
-                // Coverity fix: arm_compute::CLScheduler::sync() may throw an exception of type cl::Error.
-                arm_compute::CLScheduler::get().sync();
-                m_ClContextControl.ClearClCache();
-            }
-            catch (const cl::Error&)
-            {
-                BOOST_LOG_TRIVIAL(warning) << "WARNING: Runtime::UnloadNetwork(): an error occurred while waiting for "
-                                            "the queued CL requests to finish";
-            }
-        }
-    }
-
-    ClContextControl m_ClContextControl;
-};
-#else //ARMCOMPUTECL_ENABLED
-struct ClBackendContext::ContextControlWrapper
-{
-    ContextControlWrapper(const IRuntime::CreationOptions&){}
-};
-#endif //ARMCOMPUTECL_ENABLED
-
-ClBackendContext::ClBackendContext(const IRuntime::CreationOptions& options)
-: IBackendContext{options}
-, m_ContextControl{GetContextControlWrapper(options)}
-{
-}
-
-ClBackendContext::~ClBackendContext()
-{
-}
-
-} // namespace armnn
\ No newline at end of file
diff --git a/src/backends/cl/ClBackendContext.hpp b/src/backends/cl/ClBackendContext.hpp
deleted file mode 100644
index 4aaa8a9..0000000
--- a/src/backends/cl/ClBackendContext.hpp
+++ /dev/null
@@ -1,23 +0,0 @@
-//
-// Copyright © 2017 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-#pragma once
-
-#include <backendsCommon/IBackendContext.hpp>
-
-namespace armnn
-{
-
-class ClBackendContext : public IBackendContext
-{
-public:
-    ClBackendContext(const IRuntime::CreationOptions& options);
-    ~ClBackendContext() override;
-
-    struct ContextControlWrapper;
-private:
-    std::shared_ptr<ContextControlWrapper> m_ContextControl;
-};
-
-} // namespace armnn
\ No newline at end of file
diff --git a/src/backends/cl/ClLayerSupport.cpp b/src/backends/cl/ClLayerSupport.cpp
index ab62eee..f4e14c2 100644
--- a/src/backends/cl/ClLayerSupport.cpp
+++ b/src/backends/cl/ClLayerSupport.cpp
@@ -53,7 +53,7 @@
 static StaticRegistryInitializer<LayerSupportRegistry> g_RegisterHelper{
     LayerSupportRegistryInstance(),
     ClBackendId(),
-    [](const EmptyInitializer&)
+    []()
     {
         return GetLayerSupportPointer();
     }
diff --git a/src/backends/cl/backend.mk b/src/backends/cl/backend.mk
index 8433240..97df8e4 100644
--- a/src/backends/cl/backend.mk
+++ b/src/backends/cl/backend.mk
@@ -8,7 +8,6 @@
 # file in the root of ArmNN
 
 BACKEND_SOURCES := \
-        ClBackendContext.cpp \
         ClBackend.cpp \
         ClContextControl.cpp \
         ClLayerSupport.cpp \
@@ -55,4 +54,3 @@
         test/ClRuntimeTests.cpp \
         test/Fp16SupportTest.cpp \
         test/OpenClTimerTest.cpp
-
diff --git a/src/backends/neon/CMakeLists.txt b/src/backends/neon/CMakeLists.txt
index 0f7759d..badad2f 100644
--- a/src/backends/neon/CMakeLists.txt
+++ b/src/backends/neon/CMakeLists.txt
@@ -3,20 +3,17 @@
 # SPDX-License-Identifier: MIT
 #
 
-list(APPEND armnnNeonBackend_sources
-    NeonBackendId.hpp
-    NeonLayerSupport.cpp
-    NeonLayerSupport.hpp
-    NeonWorkloadFactory.cpp
-    NeonWorkloadFactory.hpp
-)
-
 if(ARMCOMPUTENEON)
     list(APPEND armnnNeonBackend_sources
         NeonBackend.cpp
         NeonBackend.hpp
+        NeonBackendId.hpp
         NeonInterceptorScheduler.hpp
         NeonInterceptorScheduler.cpp
+        NeonLayerSupport.cpp
+        NeonLayerSupport.hpp
+        NeonWorkloadFactory.cpp
+        NeonWorkloadFactory.hpp
         NeonTensorHandle.hpp
         NeonTimer.hpp
         NeonTimer.cpp
@@ -27,10 +24,18 @@
     if(BUILD_UNIT_TESTS)
         add_subdirectory(test)
     endif()
+
+else()
+    list(APPEND armnnNeonBackend_sources
+        NeonBackendId.hpp
+        NeonLayerSupport.cpp
+        NeonLayerSupport.hpp
+        NeonWorkloadFactory.cpp
+        NeonWorkloadFactory.hpp
+    )
 endif()
 
 add_library(armnnNeonBackend OBJECT ${armnnNeonBackend_sources})
 target_include_directories(armnnNeonBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnn)
 target_include_directories(armnnNeonBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/armnnUtils)
 target_include_directories(armnnNeonBackend PRIVATE ${PROJECT_SOURCE_DIR}/src/backends)
-
diff --git a/src/backends/neon/NeonBackend.cpp b/src/backends/neon/NeonBackend.cpp
index 1e9f633..7058d24 100644
--- a/src/backends/neon/NeonBackend.cpp
+++ b/src/backends/neon/NeonBackend.cpp
@@ -9,6 +9,8 @@
 
 #include <backendsCommon/BackendRegistry.hpp>
 
+#include <boost/cast.hpp>
+
 namespace armnn
 {
 
@@ -19,7 +21,7 @@
 {
     BackendRegistryInstance(),
     NeonBackend::GetIdStatic(),
-    [](const EmptyInitializer&)
+    []()
     {
         return IBackendInternalUniquePtr(new NeonBackend);
     }
diff --git a/src/backends/neon/NeonBackend.hpp b/src/backends/neon/NeonBackend.hpp
index 27ad94d..b8bbd78 100644
--- a/src/backends/neon/NeonBackend.hpp
+++ b/src/backends/neon/NeonBackend.hpp
@@ -12,8 +12,8 @@
 class NeonBackend : public IBackendInternal
 {
 public:
-    NeonBackend() = default;
-    ~NeonBackend() override = default;
+    NeonBackend()  = default;
+    ~NeonBackend() = default;
 
     static const BackendId& GetIdStatic();
     const BackendId& GetId() const override { return GetIdStatic(); }
diff --git a/src/backends/neon/NeonLayerSupport.cpp b/src/backends/neon/NeonLayerSupport.cpp
index 4704135..a4a6b67 100644
--- a/src/backends/neon/NeonLayerSupport.cpp
+++ b/src/backends/neon/NeonLayerSupport.cpp
@@ -49,7 +49,7 @@
 static StaticRegistryInitializer<LayerSupportRegistry> g_RegisterHelper{
     LayerSupportRegistryInstance(),
     NeonBackendId(),
-    [](const EmptyInitializer&)
+    []()
     {
         return GetLayerSupportPointer();
     }
diff --git a/src/backends/neon/backend.mk b/src/backends/neon/backend.mk
index 29b3527..8f7e72b 100644
--- a/src/backends/neon/backend.mk
+++ b/src/backends/neon/backend.mk
@@ -49,4 +49,3 @@
         test/NeonOptimizedNetworkTests.cpp \
         test/NeonRuntimeTests.cpp \
         test/NeonTimerTest.cpp
-
diff --git a/src/backends/reference/CMakeLists.txt b/src/backends/reference/CMakeLists.txt
index 1799275..ff16f18 100644
--- a/src/backends/reference/CMakeLists.txt
+++ b/src/backends/reference/CMakeLists.txt
@@ -23,4 +23,3 @@
 if(BUILD_UNIT_TESTS)
     add_subdirectory(test)
 endif()
-
diff --git a/src/backends/reference/RefBackend.cpp b/src/backends/reference/RefBackend.cpp
index 91fc3c9..b6fb0ff 100644
--- a/src/backends/reference/RefBackend.cpp
+++ b/src/backends/reference/RefBackend.cpp
@@ -9,6 +9,8 @@
 
 #include <backendsCommon/BackendRegistry.hpp>
 
+#include <boost/cast.hpp>
+
 namespace armnn
 {
 
@@ -19,7 +21,7 @@
 {
     BackendRegistryInstance(),
     RefBackend::GetIdStatic(),
-    [](const EmptyInitializer&)
+    []()
     {
         return IBackendInternalUniquePtr(new RefBackend);
     }
diff --git a/src/backends/reference/RefBackend.hpp b/src/backends/reference/RefBackend.hpp
index e2f264d..48a9d52 100644
--- a/src/backends/reference/RefBackend.hpp
+++ b/src/backends/reference/RefBackend.hpp
@@ -12,8 +12,8 @@
 class RefBackend : public IBackendInternal
 {
 public:
-    RefBackend() = default;
-    ~RefBackend() override = default;
+    RefBackend()  = default;
+    ~RefBackend() = default;
 
     static const BackendId& GetIdStatic();
     const BackendId& GetId() const override { return GetIdStatic(); }
diff --git a/src/backends/reference/RefLayerSupport.cpp b/src/backends/reference/RefLayerSupport.cpp
index 1e8fa75..629903e 100644
--- a/src/backends/reference/RefLayerSupport.cpp
+++ b/src/backends/reference/RefLayerSupport.cpp
@@ -31,7 +31,7 @@
 static StaticRegistryInitializer<LayerSupportRegistry> g_RegisterHelper{
     LayerSupportRegistryInstance(),
     RefBackendId(),
-    [](const EmptyInitializer&)
+    []()
     {
         return GetLayerSupportPointer();
     }
diff --git a/src/backends/reference/backend.mk b/src/backends/reference/backend.mk
index 8a8a78a..007efce 100644
--- a/src/backends/reference/backend.mk
+++ b/src/backends/reference/backend.mk
@@ -71,4 +71,3 @@
         test/RefLayerTests.cpp \
         test/RefOptimizedNetworkTests.cpp \
         test/RefRuntimeTests.cpp
-