COMPMID-550: Adds support for branches.

Change-Id: I778007c9221ce3156400284c4039b90245eb2b7f
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/90043
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/src/graph/SubGraph.cpp b/src/graph/SubGraph.cpp
new file mode 100644
index 0000000000..977cd4a4ae
--- /dev/null
+++ b/src/graph/SubGraph.cpp
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+#include "arm_compute/graph/SubGraph.h"
+
+#include "arm_compute/graph/Graph.h"
+#include "arm_compute/graph/INode.h"
+#include "arm_compute/graph/Tensor.h"
+
+using namespace arm_compute::graph;
+
+SubGraph::SubGraph()
+    : _nodes(), _input(nullptr), _output(nullptr)
+{
+}
+
+void SubGraph::add_node(std::unique_ptr<INode> node)
+{
+    _nodes.push_back(std::move(node));
+}
+
+void SubGraph::add_tensor_object(std::unique_ptr<ITensorObject> tensor)
+{
+    // If it's the first Tensor added then it will be the input of the Graph.
+    if(_input == nullptr)
+    {
+        _input = std::move(tensor);
+    }
+    else
+    {
+        _output = std::move(tensor);
+    }
+}
+
+std::unique_ptr<Graph> SubGraph::construct(TargetHint hint, std::unique_ptr<ITensorObject> input, std::unique_ptr<ITensorObject> output)
+{
+    auto graph = arm_compute::support::cpp14::make_unique<Graph>();
+
+    // Set hint
+    // TODO(geopin01): store hints of sub-graph
+    graph->hints().set_target_hint(hint);
+
+    // Configure input
+    if(_input == nullptr)
+    {
+        _input = std::move(input);
+    }
+    graph->add_tensor_object(std::move(_input));
+
+    // Construct nodes
+    for(auto &node : _nodes)
+    {
+        graph->add_node(std::move(node));
+    }
+
+    // Configure output
+    if(_output == nullptr)
+    {
+        _output = std::move(output);
+    }
+    graph->add_tensor_object(std::move(_output));
+
+    return graph;
+}
+
+bool SubGraph::has_input() const
+{
+    return _input != nullptr;
+}
+
+bool SubGraph::has_output() const
+{
+    return _output != nullptr;
+}
+
+SubGraph &arm_compute::graph::operator<<(SubGraph &graph, Tensor &&tensor)
+{
+    graph.add_tensor_object(arm_compute::support::cpp14::make_unique<Tensor>(std::move(tensor)));
+    return graph;
+}
+
+SubGraph &arm_compute::graph::operator<<(SubGraph &graph, SubTensor &&sub_tensor)
+{
+    graph.add_tensor_object(arm_compute::support::cpp14::make_unique<SubTensor>(std::move(sub_tensor)));
+    return graph;
+}