COMPMID-996: Add support for grouped convolution.
Change-Id: I279e29ce20b3dde57445264dc11491f127b44d70
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/124429
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/src/graph2/mutators/SplitLayerSubTensorMutator.cpp b/src/graph2/mutators/SplitLayerSubTensorMutator.cpp
new file mode 100644
index 0000000..33494ba
--- /dev/null
+++ b/src/graph2/mutators/SplitLayerSubTensorMutator.cpp
@@ -0,0 +1,89 @@
+/*
+ * 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.
+ */
+#include "arm_compute/graph2/mutators/SplitLayerSubTensorMutator.h"
+
+#include "arm_compute/graph2/Graph.h"
+#include "arm_compute/graph2/Logger.h"
+#include "arm_compute/graph2/backends/BackendRegistry.h"
+#include "arm_compute/graph2/nodes/SplitLayerNode.h"
+
+#include "arm_compute/core/utils/misc/Cast.h"
+#include "arm_compute/core/utils/misc/Iterable.h"
+
+namespace arm_compute
+{
+namespace graph2
+{
+const char *SplitLayerSubTensorMutator::name()
+{
+ return "SplitLayerSubTensorMutator";
+}
+
+void SplitLayerSubTensorMutator::mutate(Graph &g)
+{
+ // Should be in reverse order of execution
+ for(auto &node : arm_compute::utils::iterable::reverse_iterate(g.nodes()))
+ {
+ if(node && node->type() == NodeType::SplitLayer && node->input(0) != nullptr)
+ {
+ // Get output tensor
+ Tensor *input_tensor = node->input(0);
+
+ // Check that all tensor have the same target and are valid
+ bool is_valid = std::all_of(node->outputs().cbegin(), node->outputs().cend(),
+ [&](const TensorID & tid)
+ {
+ return (g.tensor(tid) != nullptr) && (g.tensor(tid)->desc().target == input_tensor->desc().target);
+ });
+
+ // Create subtensors
+ if(is_valid && backends::BackendRegistry::get().find_backend(input_tensor->desc().target) != nullptr)
+ {
+ ARM_COMPUTE_LOG_GRAPH_VERBOSE("Using sub-tensors for the node with ID : "
+ << node->id() << " and name : " << node->name() << std::endl);
+
+ auto *split_node = arm_compute::utils::cast::polymorphic_downcast<SplitLayerNode *>(node.get());
+
+ const unsigned int axis = split_node->axis();
+ const unsigned int num_splits = split_node->num_splits();
+ const bool extend_parent = (axis < 2);
+
+ // Create sub-tensor handles
+ for(unsigned int i = 0; i < node->outputs().size(); ++i)
+ {
+ Tensor *output_tensor = node->output(i);
+ const TensorShape output_shape = output_tensor->desc().shape;
+ Coordinates coords;
+ std::tie(std::ignore, coords) = SplitLayerNode::compute_output_shape(input_tensor->desc().shape, num_splits, axis, i);
+
+ backends::IDeviceBackend *backend = backends::BackendRegistry::get().find_backend(output_tensor->desc().target);
+ std::unique_ptr<ITensorHandle> handle = backend->create_subtensor(input_tensor->handle(), output_shape, coords, extend_parent);
+ output_tensor->set_handle(std::move(handle));
+ }
+ }
+ }
+ }
+}
+} // namespace graph2
+} // namespace arm_compute