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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "moco/Import/Nodes/Squeeze.h"
#include <moco/IR/Nodes/TFSqueeze.h>
#include <moco/Names.h>
#include <loco.h>
#include <stdex/Memory.h>
#include <plier/tf/Convert.h>
#include <oops/UserExn.h>
namespace
{
using namespace moco;
/**
* @brief GraphUpdate for Squeeze node
*/
class SqueezeGraphUpdate final : public GraphUpdate
{
public:
SqueezeGraphUpdate(TFSqueeze *node, const TensorName &&input_name)
: _node(node), _input_name(input_name)
{
// DO NOTHING
}
void input(const SymbolTable *) const override;
private:
TFSqueeze *_node;
const TensorName _input_name;
};
void SqueezeGraphUpdate::input(const SymbolTable *table) const
{
loco::Node *input_node = table->node(_input_name);
_node->input(input_node);
}
} // namespace
namespace moco
{
bool SqueezeGraphBuilder::validate(const tensorflow::NodeDef &node) const
{
if (node.input_size() != 1)
return false;
if (!plier::tf::has_attrs(node, {"T"}))
return false;
if (plier::tf::has_attrs(node, {"axis"}))
{
// TODO support 'axis' attribute
oops::UserExn("Squeeze: Unsupported 'axis' attribute", node.name());
}
return true;
}
void SqueezeGraphBuilder::build(const tensorflow::NodeDef &node, GraphBuilderContext *context) const
{
assert(context != nullptr);
loco::Graph *graph = context->graph();
SymbolTable *tensor_names = context->tensor_names();
UpdateQueue *updates = context->updates();
// TODO support 'axis' attribute
assert(!plier::tf::has_attrs(node, {"axis"}));
std::vector<int64_t> squeeze_dims;
if (plier::tf::has_attrs(node, {"squeeze_dims"}))
{
auto squeeze_dim_list = plier::tf::get_list_attr(node, {"squeeze_dims"});
// TODO assert squeeze_dims are mutually different?
squeeze_dims = plier::tf::as_int64_list(squeeze_dim_list);
}
// Note that it is possible that NodeDef does not have squeeze_dims attribute.
// In that case, TFSqueeze also has empty squeeze_dims,
// creating TF dialect Squeeze node
auto tf_squeeze = graph->nodes()->create<TFSqueeze>();
tf_squeeze->name(node.name());
tf_squeeze->squeeze_dims(squeeze_dims);
TensorName output_name(node.name(), 0);
tensor_names->enroll(output_name, tf_squeeze);
auto update = stdex::make_unique<SqueezeGraphUpdate>(tf_squeeze, TensorName(node.input(0)));
updates->enroll(std::move(update));
}
} // namespace moco
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