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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 "ConstCanonicalizer.h"
#include "Dialect/TFDialect.h"
#include "Dialect/TFNodes.h"
#include "Dialect/TFNodeVisitor.h"
#include "Dialect/TFNodeImpl.h"
#include <moco/tf/Names.h>
#include <moco/Log.h>
namespace
{
bool canonicalize_const(loco::Graph *graph, moco::tf::TFConst *node)
{
LOGGER(l);
/**
* @note This will replace TFConst node with Canonical Const
*
* Before
* TFConst -- C
*
* After
* TFConst -
* ConstGen -- C
*
* Where
* C : a node that uses TFConst as an input
* TFConst is disconnected from other nodes
*/
INFO(l) << "TFNodeCanonicalize TFConst begin";
auto const_node = graph->nodes()->create<loco::ConstGen>();
// copy properties
auto dtype = node->dtype();
const_node->dtype(dtype);
auto rank = node->rank();
const_node->rank(rank);
for (uint32_t r = 0; r < rank; ++r)
{
if (node->dim(r).known())
const_node->dim(r) = node->dim(r);
else
const_node->dim(r).unset();
}
switch (dtype)
{
case loco::DataType::S32:
{
uint32_t input_elements = node->size<loco::DataType::S32>();
const_node->size<loco::DataType::S32>(input_elements);
for (uint32_t i = 0; i < input_elements; ++i)
{
const_node->at<loco::DataType::S32>(i) = node->at<loco::DataType::S32>(i);
}
break;
}
case loco::DataType::FLOAT32:
{
uint32_t input_elements = node->size<loco::DataType::FLOAT32>();
const_node->size<loco::DataType::FLOAT32>(input_elements);
for (uint32_t i = 0; i < input_elements; ++i)
{
const_node->at<loco::DataType::FLOAT32>(i) = node->at<loco::DataType::FLOAT32>(i);
}
break;
}
default:
throw std::runtime_error("NYI for this DataType");
}
// update graph
replace(node).with(const_node);
INFO(l) << "TFNodeCanonicalize TFConst done";
return true;
}
} // namespace
namespace moco
{
namespace tf
{
bool ConstCanonicalizer::run(loco::Graph *graph)
{
auto active_nodes = loco::active_nodes(loco::output_nodes(graph));
bool changed = false;
for (auto node : active_nodes)
{
if (node->dialect() == TFDialect::get())
{
auto tf_const = dynamic_cast<moco::tf::TFConst *>(node);
if (tf_const != nullptr)
{
if (canonicalize_const(graph, tf_const))
changed = true;
}
}
}
return changed;
}
} // namespace tf
} // namespace moco
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