IVGCVSW-4906 Add front-end support for FILL operator

 * Added new fill layer
 * Added visitor tests

Signed-off-by: Ryan OShea <Ryan.OShea2@arm.com>
Change-Id: Iea677014866b4f2d514004623f59ee83f3c0eef8
Signed-off-by: Keith Davis <keith.davis@arm.com>

2 files changed, 92 insertions, 0 deletions

diff --git a/src/armnn/layers/FillLayer.cpp b/src/armnn/layers/FillLayer.cpp
new file mode 100644
index 0000000000..03f93f76da
--- /dev/null
+++ b/src/armnn/layers/FillLayer.cpp
@@ -0,0 +1,51 @@
+//
+// Copyright © 2020 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#include "FillLayer.hpp"
+
+#include "LayerCloneBase.hpp"
+
+#include <armnn/TypesUtils.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+namespace armnn
+{
+
+FillLayer::FillLayer(const FillDescriptor& param, const char* name)
+    : LayerWithParameters(1, 1, LayerType::Fill, param, name)
+{
+}
+
+std::unique_ptr<IWorkload> FillLayer::CreateWorkload(const IWorkloadFactory& factory) const
+{
+    FillQueueDescriptor descriptor;
+    return factory.CreateFill(descriptor, PrepInfoAndDesc(descriptor) );
+}
+
+FillLayer* FillLayer::Clone(Graph& graph) const
+{
+    return CloneBase<FillLayer>(graph, m_Param, GetName());
+}
+
+void FillLayer::ValidateTensorShapesFromInputs()
+{
+    VerifyLayerConnections(1, CHECK_LOCATION());
+
+    auto inferredShapes = InferOutputShapes({ GetInputSlot(0).GetConnection()->GetTensorInfo().GetShape() });
+
+    ARMNN_ASSERT(inferredShapes.size() == 1);
+
+    ConditionalThrowIfNotEqual<LayerValidationException>(
+        "FillLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
+        GetOutputSlot(0).GetTensorInfo().GetShape(),
+        inferredShapes[0]);
+}
+
+void FillLayer::Accept(ILayerVisitor& visitor) const
+{
+    visitor.VisitGatherLayer(this, GetName());
+}
+
+} // namespace armnn
diff --git a/src/armnn/layers/FillLayer.hpp b/src/armnn/layers/FillLayer.hpp
new file mode 100644
index 0000000000..b9a972a27a
--- /dev/null
+++ b/src/armnn/layers/FillLayer.hpp
@@ -0,0 +1,41 @@
+//
+// Copyright © 2020 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include "LayerWithParameters.hpp"
+
+namespace armnn
+{
+
+/// This layer represents a fill operation.
+class FillLayer : public LayerWithParameters<FillDescriptor>
+{
+public:
+    /// Makes a workload for the Fill layer.
+    /// @param [in] factory The workload factory which will create the workload.
+    /// @return A pointer to the created workload, or nullptr if not created.
+    virtual std::unique_ptr<IWorkload> CreateWorkload(const IWorkloadFactory& factory) const override;
+
+    /// Creates a dynamically-allocated copy of this layer.
+    /// @param [in] graph The graph into which this layer is being cloned.
+    FillLayer* Clone(Graph& graph) const override;
+
+    /// Check if the input tensor shape(s)
+    /// will lead to a valid configuration of @ref FillLayer.
+    void ValidateTensorShapesFromInputs() override;
+
+    void Accept(ILayerVisitor& visitor) const override;
+
+protected:
+    /// Constructor to create a FillLayer.
+    /// @param [in] descriptor to configure the fill operation.
+    /// @param [in] name Optional name for the layer.
+    FillLayer(const FillDescriptor& descriptor, const char* name);
+
+    /// Default destructor
+    ~FillLayer() = default;
+};
+
+} // namespace