COMPMID-797: Switch to new graph.

- Cleaned up build system

Change-Id: If2faa27ee5b31fa8b972836960ab3ef671059c8d
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/126435
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Tello <pablo.tello@arm.com>

18 files changed, 1262 insertions, 0 deletions

diff --git a/arm_compute/graph/backends/BackendRegistrar.h b/arm_compute/graph/backends/BackendRegistrar.h
new file mode 100644
index 0000000000..f7f2f7f9d2
--- /dev/null
+++ b/arm_compute/graph/backends/BackendRegistrar.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_GRAPH_BACKEND_REGISTRAR_H__
+#define ARM_COMPUTE_GRAPH_BACKEND_REGISTRAR_H__
+
+#include "arm_compute/graph/Types.h"
+#include "arm_compute/graph/backends/BackendRegistry.h"
+
+#include <utility>
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+namespace detail
+{
+/** Helper class to statically register a backend */
+template <typename T>
+class BackendRegistrar final
+{
+public:
+    /** Add a new backend to the backend registry
+     *
+     * @param[in] target Execution target
+     */
+    BackendRegistrar(Target target);
+};
+
+template <typename T>
+inline BackendRegistrar<T>::BackendRegistrar(Target target)
+{
+    BackendRegistry::get().add_backend<T>(target);
+}
+} // namespace detail
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_GRAPH_BACKEND_REGISTRAR_H__ */
\ No newline at end of file
diff --git a/arm_compute/graph/backends/BackendRegistry.h b/arm_compute/graph/backends/BackendRegistry.h
new file mode 100644
index 0000000000..69114ed26d
--- /dev/null
+++ b/arm_compute/graph/backends/BackendRegistry.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_BACKEND_REGISTRY_H__
+#define __ARM_COMPUTE_GRAPH_BACKEND_REGISTRY_H__
+
+#include "arm_compute/graph/IDeviceBackend.h"
+#include "arm_compute/graph/Types.h"
+#include "support/ToolchainSupport.h"
+
+#include <map>
+#include <memory>
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** Registry holding all the supported backends */
+class BackendRegistry final
+{
+public:
+    /** Gets backend registry instance
+     *
+     * @return Backend registry instance
+     */
+    static BackendRegistry &get();
+    /** Finds a backend in the registry
+     *
+     * @param[in] target Backend target
+     *
+     * @return Pointer to the backend interface if found, else nullptr
+     */
+    IDeviceBackend *find_backend(Target target);
+    /** Checks if a backend for a given target exists
+     *
+     * @param[in] target Execution target
+     *
+     * @return True if exists else false
+     */
+    bool contains(Target target) const;
+    /** Backends accessor
+     *
+     * @return Map containing the registered backends
+     */
+    const std::map<Target, std::unique_ptr<IDeviceBackend>> &backends() const;
+    /** Registers a backend to the registry
+     *
+     * @param[in] target Execution target to register for
+     */
+    template <typename T>
+    void add_backend(Target target);
+
+private:
+    /** Default Constructor */
+    BackendRegistry();
+
+private:
+    std::map<Target, std::unique_ptr<IDeviceBackend>> _registered_backends;
+};
+
+template <typename T>
+inline void BackendRegistry::add_backend(Target target)
+{
+    _registered_backends[target] = support::cpp14::make_unique<T>();
+}
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_BACKEND_REGISTRY_H__ */
diff --git a/arm_compute/graph/backends/CL/CLDeviceBackend.h b/arm_compute/graph/backends/CL/CLDeviceBackend.h
new file mode 100644
index 0000000000..5adbe0e1a8
--- /dev/null
+++ b/arm_compute/graph/backends/CL/CLDeviceBackend.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_CLDEVICEBACKEND_H__
+#define __ARM_COMPUTE_GRAPH_CLDEVICEBACKEND_H__
+
+#include "arm_compute/graph/IDeviceBackend.h"
+
+#include "arm_compute/runtime/CL/CLBufferAllocator.h"
+#include "arm_compute/runtime/CL/CLTuner.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** OpenCL device backend */
+class CLDeviceBackend final : public IDeviceBackend
+{
+public:
+    /** Default Constructor */
+    CLDeviceBackend();
+    /** Destructor */
+    ~CLDeviceBackend();
+    /** Switchs on or off the kernel tuning
+     *
+     * @note When true the tuner set is used, if no tuner is set a new default one is created
+     *
+     * @param[in] enable_tuning Enables tuning if false else true
+     */
+    void set_kernel_tuning(bool enable_tuning);
+
+    // Inherited overridden methods
+    void initialize_backend() override;
+    void setup_backend_context(GraphContext &ctx) override;
+    bool                           is_backend_supported() override;
+    std::unique_ptr<ITensorHandle> create_tensor(const Tensor &tensor) override;
+    std::unique_ptr<ITensorHandle> create_subtensor(ITensorHandle *parent, TensorShape shape, Coordinates coords, bool extend_parent) override;
+    std::unique_ptr<arm_compute::IFunction> configure_node(INode &node, GraphContext &ctx) override;
+    Status validate_node(INode &node) override;
+    std::shared_ptr<arm_compute::IMemoryManager> create_memory_manager(MemoryManagerAffinity affinity) override;
+
+private:
+    CLTuner           _tuner;     /**< CL kernel tuner */
+    CLBufferAllocator _allocator; /**< CL buffer affinity allocator */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_CLDEVICEBACKEND_H__
diff --git a/arm_compute/graph/backends/CL/CLFunctionFactory.h b/arm_compute/graph/backends/CL/CLFunctionFactory.h
new file mode 100644
index 0000000000..6caca547cf
--- /dev/null
+++ b/arm_compute/graph/backends/CL/CLFunctionFactory.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_CLFUNCTIONFACTORY_H__
+#define __ARM_COMPUTE_GRAPH_CLFUNCTIONFACTORY_H__
+
+#include "arm_compute/runtime/IFunction.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+namespace graph
+{
+// Forward declarations
+class INode;
+class GraphContext;
+
+namespace backends
+{
+/** Factory for generating OpenCL backend functions **/
+class CLFunctionFactory final
+{
+public:
+    /** Create a backend execution function depending on the node type
+     *
+     * @param[in] node Node to create the backend function for
+     * @param[in] ctx  Context to use
+     *
+     * @return Backend function
+     */
+    static std::unique_ptr<arm_compute::IFunction> create(INode *node, GraphContext &ctx);
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_CLFUNCTIONFACTORY_H__
diff --git a/arm_compute/graph/backends/CL/CLNodeValidator.h b/arm_compute/graph/backends/CL/CLNodeValidator.h
new file mode 100644
index 0000000000..9bd4842cf7
--- /dev/null
+++ b/arm_compute/graph/backends/CL/CLNodeValidator.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_CLNODEVALIDATOR_H__
+#define __ARM_COMPUTE_GRAPH_CLNODEVALIDATOR_H__
+
+#include "arm_compute/core/Error.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+// Forward declarations
+class INode;
+
+namespace backends
+{
+class CLNodeValidator final
+{
+public:
+    /** Validate a node
+     *
+     * @param[in] node Node to validate
+     *
+     * @return An error status
+     */
+    static Status validate(INode *node);
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_CLNODEVALIDATOR_H__
diff --git a/arm_compute/graph/backends/CL/CLSubTensorHandle.h b/arm_compute/graph/backends/CL/CLSubTensorHandle.h
new file mode 100644
index 0000000000..4be5842c70
--- /dev/null
+++ b/arm_compute/graph/backends/CL/CLSubTensorHandle.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_CLSUBTENSORHANDLE_H__
+#define __ARM_COMPUTE_GRAPH_CLSUBTENSORHANDLE_H__
+
+#include "arm_compute/graph/ITensorHandle.h"
+
+#include "arm_compute/runtime/CL/CLSubTensor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** OpenCL Sub-Tensor handle interface object **/
+class CLSubTensorHandle final : public ITensorHandle
+{
+public:
+    /** Default constructor
+     *
+     * @param[in] parent_handle Parent tensor handle
+     * @param[in] shape         Sub-Tensor shape
+     * @param[in] coords        Starting coordinates
+     * @param[in] extend_parent Extends parent shape if true
+     */
+    CLSubTensorHandle(ITensorHandle *parent_handle, const TensorShape &shape, const Coordinates &coords, bool extend_parent = false);
+    /** Destructor: free the tensor's memory */
+    ~CLSubTensorHandle() = default;
+    /** Allow instances of this class to be move constructed */
+    CLSubTensorHandle(CLSubTensorHandle &&) = default;
+    /** Allow instances of this class to be moved */
+    CLSubTensorHandle &operator=(CLSubTensorHandle &&) = default;
+
+    // Inherited overridden methods
+    void                        allocate() override;
+    arm_compute::ITensor       &tensor() override;
+    const arm_compute::ITensor &tensor() const override;
+    void map(bool blocking) override;
+    void unmap() override;
+    void release_if_unused() override;
+    bool is_subtensor() const override;
+
+private:
+    arm_compute::CLSubTensor _sub_tensor; /**< Backend Sub-Tensor */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_CLSUBTENSORHANDLE_H__ */
diff --git a/arm_compute/graph/backends/CL/CLTensorHandle.h b/arm_compute/graph/backends/CL/CLTensorHandle.h
new file mode 100644
index 0000000000..8f5a70cbbb
--- /dev/null
+++ b/arm_compute/graph/backends/CL/CLTensorHandle.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_CLTENSORHANDLE_H__
+#define __ARM_COMPUTE_GRAPH_CLTENSORHANDLE_H__
+
+#include "arm_compute/graph/ITensorHandle.h"
+
+#include "arm_compute/runtime/CL/CLTensor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** OpenCL Tensor handle interface object **/
+class CLTensorHandle final : public ITensorHandle
+{
+public:
+    /** Default Constructor
+     *
+     * @param[in] info Tensor metadata
+     */
+    CLTensorHandle(const ITensorInfo &info);
+    /** Destructor: free the tensor's memory */
+    ~CLTensorHandle() = default;
+    /** Allow instances of this class to be move constructed */
+    CLTensorHandle(CLTensorHandle &&) = default;
+    /** Allow instances of this class to be moved */
+    CLTensorHandle &operator=(CLTensorHandle &&) = default;
+
+    // Inherited overridden methods
+    void                        allocate() override;
+    arm_compute::ITensor       &tensor() override;
+    const arm_compute::ITensor &tensor() const override;
+    void map(bool blocking) override;
+    void unmap() override;
+    void release_if_unused() override;
+    bool is_subtensor() const override;
+
+private:
+    arm_compute::CLTensor _tensor; /**< Backend Tensor */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_CLTENSORHANDLE_H__ */
diff --git a/arm_compute/graph/backends/GLES/GCDeviceBackend.h b/arm_compute/graph/backends/GLES/GCDeviceBackend.h
new file mode 100644
index 0000000000..be81a8f1f2
--- /dev/null
+++ b/arm_compute/graph/backends/GLES/GCDeviceBackend.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_GCDEVICEBACKEND_H__
+#define __ARM_COMPUTE_GRAPH_GCDEVICEBACKEND_H__
+
+#include "arm_compute/graph/IDeviceBackend.h"
+
+#include "arm_compute/runtime/GLES_COMPUTE/GCBufferAllocator.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** GLES Compute device backend */
+class GCDeviceBackend final : public IDeviceBackend
+{
+public:
+    /** Default Constructor */
+    GCDeviceBackend();
+
+    // Inherited overridden methods
+    void initialize_backend() override;
+    void setup_backend_context(GraphContext &ctx) override;
+    bool                           is_backend_supported() override;
+    std::unique_ptr<ITensorHandle> create_tensor(const Tensor &tensor) override;
+    std::unique_ptr<ITensorHandle> create_subtensor(ITensorHandle *parent, TensorShape shape, Coordinates coords, bool extend_parent) override;
+    std::unique_ptr<arm_compute::IFunction> configure_node(INode &node, GraphContext &ctx) override;
+    Status validate_node(INode &node) override;
+    std::shared_ptr<arm_compute::IMemoryManager> create_memory_manager(MemoryManagerAffinity affinity) override;
+
+private:
+    GCBufferAllocator _allocator; /**< GLES buffer affinity allocator */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_GCDEVICEBACKEND_H__
diff --git a/arm_compute/graph/backends/GLES/GCFunctionFactory.h b/arm_compute/graph/backends/GLES/GCFunctionFactory.h
new file mode 100644
index 0000000000..c819c034f6
--- /dev/null
+++ b/arm_compute/graph/backends/GLES/GCFunctionFactory.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_GCFUNCTIONFACTORY_H__
+#define __ARM_COMPUTE_GRAPH_GCFUNCTIONFACTORY_H__
+
+#include "arm_compute/runtime/IFunction.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+namespace graph
+{
+// Forward declarations
+class INode;
+class GraphContext;
+
+namespace backends
+{
+/** Factory for generating GLES compute backend functions **/
+class GCFunctionFactory final
+{
+public:
+    /** Create a backend execution function depending on the node type
+     *
+     * @param[in] node Node to create the backend function for
+     * @param[in] ctx  Context to use
+     *
+     * @return Backend function
+     */
+    static std::unique_ptr<arm_compute::IFunction> create(INode *node, GraphContext &ctx);
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_GCFUNCTIONFACTORY_H__
diff --git a/arm_compute/graph/backends/GLES/GCNodeValidator.h b/arm_compute/graph/backends/GLES/GCNodeValidator.h
new file mode 100644
index 0000000000..6fdfbdd894
--- /dev/null
+++ b/arm_compute/graph/backends/GLES/GCNodeValidator.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_GCNODEVALIDATOR_H__
+#define __ARM_COMPUTE_GRAPH_GCNODEVALIDATOR_H__
+
+#include "arm_compute/core/Error.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+// Forward declarations
+class INode;
+
+namespace backends
+{
+class GCNodeValidator final
+{
+public:
+    /** Validate a node
+     *
+     * @param[in] node Node to validate
+     *
+     * @return An error status
+     */
+    static Status validate(INode *node);
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_GCNODEVALIDATOR_H__
diff --git a/arm_compute/graph/backends/GLES/GCTensorHandle.h b/arm_compute/graph/backends/GLES/GCTensorHandle.h
new file mode 100644
index 0000000000..774268fd3f
--- /dev/null
+++ b/arm_compute/graph/backends/GLES/GCTensorHandle.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_GCTENSORHANDLE_H__
+#define __ARM_COMPUTE_GRAPH_GCTENSORHANDLE_H__
+
+#include "arm_compute/graph/ITensorHandle.h"
+
+#include "arm_compute/runtime/GLES_COMPUTE/GCTensor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** GLES compute tensor handle interface object **/
+class GCTensorHandle final : public ITensorHandle
+{
+public:
+    /** Default Constructor
+     *
+     * @param[in] info Tensor metadata
+     */
+    GCTensorHandle(const ITensorInfo &info);
+    /** Destructor: free the tensor's memory */
+    ~GCTensorHandle() = default;
+    /** Allow instances of this class to be move constructed */
+    GCTensorHandle(GCTensorHandle &&) = default;
+    /** Allow instances of this class to be moved */
+    GCTensorHandle &operator=(GCTensorHandle &&) = default;
+
+    // Inherited overridden methods
+    void                        allocate() override;
+    arm_compute::ITensor       &tensor() override;
+    const arm_compute::ITensor &tensor() const override;
+    void map(bool blocking) override;
+    void unmap() override;
+    void release_if_unused() override;
+    bool is_subtensor() const override;
+
+private:
+    arm_compute::GCTensor _tensor; /**< Backend Tensor */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_GCTENSORHANDLE_H__ */
diff --git a/arm_compute/graph/backends/NEON/NEDeviceBackend.h b/arm_compute/graph/backends/NEON/NEDeviceBackend.h
new file mode 100644
index 0000000000..b23c83adea
--- /dev/null
+++ b/arm_compute/graph/backends/NEON/NEDeviceBackend.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_NEDEVICEBACKEND_H__
+#define __ARM_COMPUTE_GRAPH_NEDEVICEBACKEND_H__
+
+#include "arm_compute/graph/IDeviceBackend.h"
+
+#include "arm_compute/runtime/Allocator.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** NEON device backend */
+class NEDeviceBackend final : public IDeviceBackend
+{
+public:
+    NEDeviceBackend();
+
+    // Inherited overridden methods
+    void initialize_backend() override;
+    void setup_backend_context(GraphContext &ctx) override;
+    bool                           is_backend_supported() override;
+    std::unique_ptr<ITensorHandle> create_tensor(const Tensor &tensor) override;
+    std::unique_ptr<ITensorHandle> create_subtensor(ITensorHandle *parent, TensorShape shape, Coordinates coords, bool extend_parent) override;
+    std::unique_ptr<arm_compute::IFunction> configure_node(INode &node, GraphContext &ctx) override;
+    Status validate_node(INode &node) override;
+    std::shared_ptr<arm_compute::IMemoryManager> create_memory_manager(MemoryManagerAffinity affinity) override;
+
+private:
+    Allocator _allocator; /**< NEON backend allocator */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_NEDEVICEBACKEND_H__
diff --git a/arm_compute/graph/backends/NEON/NEFunctionFactory.h b/arm_compute/graph/backends/NEON/NEFunctionFactory.h
new file mode 100644
index 0000000000..1143c29c5b
--- /dev/null
+++ b/arm_compute/graph/backends/NEON/NEFunctionFactory.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_NEFUNCTIONFACTORY_H__
+#define __ARM_COMPUTE_GRAPH_NEFUNCTIONFACTORY_H__
+
+#include "arm_compute/runtime/IFunction.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+namespace graph
+{
+// Forward declarations
+class INode;
+class GraphContext;
+
+namespace backends
+{
+/** Factory for generating NEON backend functions **/
+class NEFunctionFactory final
+{
+public:
+    /** Create a backend execution function depending on the node type
+     *
+     * @param[in] node Node to create the backend function for
+     * @param[in] ctx  Context to use
+     *
+     * @return Backend function
+     */
+    static std::unique_ptr<arm_compute::IFunction> create(INode *node, GraphContext &ctx);
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_NEFUNCTIONFACTORY_H__
diff --git a/arm_compute/graph/backends/NEON/NENodeValidator.h b/arm_compute/graph/backends/NEON/NENodeValidator.h
new file mode 100644
index 0000000000..38f58a9d91
--- /dev/null
+++ b/arm_compute/graph/backends/NEON/NENodeValidator.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_NENODEVALIDATOR_H__
+#define __ARM_COMPUTE_GRAPH_NENODEVALIDATOR_H__
+
+#include "arm_compute/core/Error.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+// Forward declarations
+class INode;
+
+namespace backends
+{
+class NENodeValidator final
+{
+public:
+    /** Validate a node
+     *
+     * @param[in] node Node to validate
+     *
+     * @return An error status
+     */
+    static Status validate(INode *node);
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif //__ARM_COMPUTE_GRAPH_NENODEVALIDATOR_H__
diff --git a/arm_compute/graph/backends/NEON/NESubTensorHandle.h b/arm_compute/graph/backends/NEON/NESubTensorHandle.h
new file mode 100644
index 0000000000..11dcec60f3
--- /dev/null
+++ b/arm_compute/graph/backends/NEON/NESubTensorHandle.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_NESUBTENSORHANDLE_H__
+#define __ARM_COMPUTE_GRAPH_NESUBTENSORHANDLE_H__
+
+#include "arm_compute/graph/ITensorHandle.h"
+
+#include "arm_compute/runtime/SubTensor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** NEON Sub-Tensor handle interface object **/
+class NESubTensorHandle final : public ITensorHandle
+{
+public:
+    /** Default constructor
+     *
+     * @param[in] parent_handle Parent tensor handle
+     * @param[in] shape         Sub-Tensor shape
+     * @param[in] coords        Starting coordinates
+     * @param[in] extend_parent Extends parent shape if true
+     */
+    NESubTensorHandle(ITensorHandle *parent_handle, const TensorShape &shape, const Coordinates &coords, bool extend_parent = false);
+    /** Destructor: free the tensor's memory */
+    ~NESubTensorHandle() = default;
+    /** Allow instances of this class to be move constructed */
+    NESubTensorHandle(NESubTensorHandle &&) = default;
+    /** Allow instances of this class to be moved */
+    NESubTensorHandle &operator=(NESubTensorHandle &&) = default;
+
+    // Inherited overridden methods
+    void                        allocate() override;
+    arm_compute::ITensor       &tensor() override;
+    const arm_compute::ITensor &tensor() const override;
+    void map(bool blocking) override;
+    void unmap() override;
+    void release_if_unused() override;
+    bool is_subtensor() const override;
+
+private:
+    arm_compute::SubTensor _sub_tensor; /**< Backend Sub-Tensor */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_NESUBTENSORHANDLE_H__ */
diff --git a/arm_compute/graph/backends/NEON/NETensorHandle.h b/arm_compute/graph/backends/NEON/NETensorHandle.h
new file mode 100644
index 0000000000..06ccdd83cc
--- /dev/null
+++ b/arm_compute/graph/backends/NEON/NETensorHandle.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_NETENSORHANDLE_H__
+#define __ARM_COMPUTE_GRAPH_NETENSORHANDLE_H__
+
+#include "arm_compute/graph/ITensorHandle.h"
+
+#include "arm_compute/runtime/Tensor.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** NEON Tensor handle interface object **/
+class NETensorHandle final : public ITensorHandle
+{
+public:
+    /** Default Constructor
+     *
+     * @param[in] info Tensor metadata
+     */
+    NETensorHandle(const ITensorInfo &info);
+    /** Destructor: free the tensor's memory */
+    ~NETensorHandle() = default;
+    /** Allow instances of this class to be move constructed */
+    NETensorHandle(NETensorHandle &&) = default;
+    /** Allow instances of this class to be moved */
+    NETensorHandle &operator=(NETensorHandle &&) = default;
+
+    // Inherited overridden methods
+    void                        allocate() override;
+    arm_compute::ITensor       &tensor() override;
+    const arm_compute::ITensor &tensor() const override;
+    void map(bool blocking) override;
+    void unmap() override;
+    void release_if_unused() override;
+    bool is_subtensor() const override;
+
+private:
+    arm_compute::Tensor _tensor; /**< Backend Tensor */
+};
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_NETENSORHANDLE_H__ */
diff --git a/arm_compute/graph/backends/Utils.h b/arm_compute/graph/backends/Utils.h
new file mode 100644
index 0000000000..b902d17c0e
--- /dev/null
+++ b/arm_compute/graph/backends/Utils.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_BACKENDS_UTILS_H__
+#define __ARM_COMPUTE_GRAPH_BACKENDS_UTILS_H__
+
+#include "arm_compute/graph/GraphContext.h"
+#include "arm_compute/runtime/IMemoryManager.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+/** Creates and configures a named function
+ *
+ * @param[in] name Name of the function
+ * @param[in] args Function arguments
+ *
+ * @return  A configured backend function
+ */
+template <typename FunctionType, typename FunctionNameType, typename... ParameterType>
+std::pair<std::unique_ptr<arm_compute::IFunction>, FunctionNameType> create_named_function(FunctionNameType name, ParameterType... args)
+{
+    auto f = arm_compute::support::cpp14::make_unique<FunctionType>();
+    f->configure(std::forward<ParameterType>(args)...);
+    return std::make_pair(std::move(f), name);
+}
+
+/** Creates and configures a named function
+ *
+ * @param[in] name Name of the function
+ * @param[in] mm   Memory manager to use
+ * @param[in] args Function arguments
+ *
+ * @return  A configured backend function
+ */
+template <typename FunctionType, typename FunctionNameType, typename MemoryManagerType, typename... ParameterType>
+std::pair<std::unique_ptr<arm_compute::IFunction>, FunctionNameType> create_named_memory_managed_function(FunctionNameType name,
+                                                                                                          MemoryManagerType mm,
+                                                                                                          ParameterType... args)
+{
+    auto f = arm_compute::support::cpp14::make_unique<FunctionType>(mm);
+    f->configure(std::forward<ParameterType>(args)...);
+    return std::make_pair(std::move(f), name);
+}
+
+/** Checks if an operation is in place
+ *
+ * @param[in] input  Pointer to input
+ * @param[in] output Pointer to output
+ *
+ * @return True if output is nullptr or input is equal to the output, else false
+ */
+inline bool is_in_place_operation(void *input, void *output)
+{
+    return (output == nullptr) || (input == output);
+}
+
+/** Returns the memory manager for a given target
+ *
+ * @param[in] ctx    Graph context containing memory management metadata
+ * @param[in] target Target to retrieve the memory manager from
+ *
+ * @return The memory manager for the given target else false
+ */
+inline std::shared_ptr<IMemoryManager> get_memory_manager(GraphContext &ctx, Target target)
+{
+    bool enabled = ctx.config().use_function_memory_manager && (ctx.memory_management_ctx(target) != nullptr);
+    return enabled ? ctx.memory_management_ctx(target)->mm : nullptr;
+}
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+
+#endif /* __ARM_COMPUTE_GRAPH_BACKENDS_UTILS_H__ */
diff --git a/arm_compute/graph/backends/ValidateHelpers.h b/arm_compute/graph/backends/ValidateHelpers.h
new file mode 100644
index 0000000000..ca01295d15
--- /dev/null
+++ b/arm_compute/graph/backends/ValidateHelpers.h
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_BACKENDS_DETAIL_VALIDATE_HELPERS_H__
+#define __ARM_COMPUTE_GRAPH_BACKENDS_DETAIL_VALIDATE_HELPERS_H__
+
+#include "arm_compute/graph/Logger.h"
+#include "arm_compute/graph/Tensor.h"
+#include "arm_compute/graph/Types.h"
+#include "arm_compute/graph/nodes/Nodes.h"
+
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/ITensorInfo.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+namespace backends
+{
+namespace detail
+{
+/** Returns backing tensor info of a given tensor
+ *
+ * @param[in] tensor Tensor to extract the backing tensor from
+ *
+ * @return Backing tensor tensor info if present else nullptr
+ */
+inline arm_compute::ITensorInfo *get_backing_tensor_info(arm_compute::graph::Tensor *tensor)
+{
+    return ((tensor == nullptr) || (tensor->handle() == nullptr)) ? nullptr : tensor->handle()->tensor().info();
+}
+
+/** Validates a Convolution layer node
+ *
+ * @tparam ConvolutionLayer          Default Convolution layer function type
+ * @tparam DirectConvolutionLayer    Direct Convolution layer function type
+ * @tparam GEMMConvolutionLayer      GEMM Convolution layer function type
+ * @tparam WinogradConvolutionLayer  Winograd Convolution layer function type
+ *
+ * @param[in] node Node to validate
+ *
+ * @return Status
+ */
+template <typename ConvolutionLayer, typename DirectConvolutionLayer, typename GEMMConvolutionLayer, typename WinogradConvolutionLayer>
+Status validate_convolution_layer(ConvolutionLayerNode &node)
+{
+    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Validating ConvolutionLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_inputs() != 3);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_outputs() != 1);
+
+    // Extract IO and info
+    arm_compute::ITensorInfo *input          = get_backing_tensor_info(node.input(0));
+    arm_compute::ITensorInfo *weights        = get_backing_tensor_info(node.input(1));
+    arm_compute::ITensorInfo *biases         = get_backing_tensor_info(node.input(2));
+    arm_compute::ITensorInfo *output         = get_backing_tensor_info(node.output(0));
+    const PadStrideInfo       conv_info      = node.convolution_info();
+    const ConvolutionMethod   conv_algorithm = node.convolution_method();
+
+    // Validate function
+    Status status{};
+    switch(conv_algorithm)
+    {
+        case ConvolutionMethod::DIRECT:
+            status = DirectConvolutionLayer::validate(input, weights, biases, output, conv_info);
+            break;
+        case ConvolutionMethod::GEMM:
+            status = GEMMConvolutionLayer::validate(input, weights, biases, output, conv_info);
+            break;
+        case ConvolutionMethod::WINOGRAD:
+            status = WinogradConvolutionLayer::validate(input, weights, biases, output, conv_info);
+            break;
+        default:
+            break;
+    }
+
+    // If validation fails try the Default approach
+    if(!bool(status) || (conv_algorithm == ConvolutionMethod::DEFAULT))
+    {
+        std::cout << status.error_description() << std::endl;
+        status = ConvolutionLayer::validate(input, weights, biases, output, conv_info);
+        if(bool(status))
+        {
+            ARM_COMPUTE_LOG_GRAPH_INFO("Switched ConvolutionLayer method of node with ID : "
+                                       << node.id() << " and Name: " << node.name() << std::endl);
+            node.set_convolution_method(ConvolutionMethod::DEFAULT);
+        }
+    }
+
+    return status;
+}
+
+/** Validates a Depthwise Convolution layer node
+ *
+ * @tparam DepthwiseConvolutionLayer    Default Depthwise Convolution layer type
+ * @tparam DepthwiseConvolutionLayer3x3 Optimized 3x3 Depthwise Convolution layer type
+ *
+ * @param[in] node Node to validate
+ *
+ * @return Status
+ */
+template <typename DepthwiseConvolutionLayer, typename DepthwiseConvolutionLayer3x3>
+Status validate_depthwise_convolution_layer(DepthwiseConvolutionLayerNode &node)
+{
+    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Validating DepthwiseConvolutionLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_inputs() != 3);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_outputs() != 1);
+
+    // Extract IO and info
+    arm_compute::ITensorInfo        *weights       = detail::get_backing_tensor_info(node.input(1));
+    const DepthwiseConvolutionMethod dwc_algorithm = node.depthwise_convolution_method();
+    ARM_COMPUTE_ERROR_ON(weights == nullptr);
+
+    // TODO (geopin01) : Switch when validation is implemented
+    // Validate function
+    if((dwc_algorithm == DepthwiseConvolutionMethod::OPTIMIZED_3x3) && (weights->tensor_shape().x() != 3))
+    {
+        ARM_COMPUTE_LOG_GRAPH_INFO("Switched DepthwiseConvolutionLayer method of node with ID : "
+                                   << node.id() << " and Name: " << node.name() << std::endl);
+        node.set_depthwise_convolution_method(DepthwiseConvolutionMethod::DEFAULT);
+    }
+
+    return Status{};
+}
+} // namespace detail
+} // namespace backends
+} // namespace graph
+} // namespace arm_compute
+
+#endif /* __ARM_COMPUTE_GRAPH_BACKENDS_DETAIL_VALIDATE_HELPERS_H__ */