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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/Pass/Passes/RemoveTFIdentityNode.h"
#include <moco/IR/TFDialect.h>
#include <moco/IR/TFNode.h>
#include <set>
namespace moco
{
bool RemoveTFIdentityNode::run(loco::Graph *g)
{
struct Collector final : public moco::TFNodeMutableVisitor<void>
{
void visit(moco::TFIdentity *node) final
{
if (node->input() != nullptr)
{
candidates.insert(node);
}
}
void visit(moco::TFNode *) final { return; }
std::set<moco::TFIdentity *> candidates;
};
Collector collector;
for (auto node : loco::all_nodes(g))
{
if (node->dialect() == moco::TFDialect::get())
{
auto tf_node = dynamic_cast<moco::TFNode *>(node);
// NOTE our analysis tool reports an error for tf_node may be nullptr
if (tf_node != nullptr)
tf_node->accept(&collector);
}
}
for (auto node : collector.candidates)
{
replace(node).with(node->input());
node->input(nullptr);
}
return collector.candidates.size() > 0;
}
} // namespace moco
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