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/*
* Copyright (c) 2022 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 "luci/Pass/RemoveDuplicateConstPass.h"
#include <luci/Log.h>
namespace
{
bool compare_quant_params(luci::CircleConst *left, luci::CircleConst *right)
{
const auto left_quant_param = left->quantparam();
const auto right_quant_param = right->quantparam();
if (left_quant_param == right_quant_param)
return true;
if (left_quant_param != nullptr and right_quant_param != nullptr)
{
if (left_quant_param->scale == right_quant_param->scale and
left_quant_param->quantized_dimension == right_quant_param->quantized_dimension and
left_quant_param->zerop == right_quant_param->zerop and
left_quant_param->min == right_quant_param->min and
left_quant_param->max == right_quant_param->max)
{
return true;
}
}
return false;
}
bool compare_dim_values(luci::CircleConst *left, luci::CircleConst *right)
{
const auto left_rank = left->rank();
const auto right_rank = right->rank();
if (left_rank != right_rank)
return false;
for (uint32_t i = 0; i < left_rank; ++i)
{
if (left->dim(i).value() != right->dim(i).value())
return false;
}
return true;
}
template <loco::DataType DT> bool is_equal_consts(luci::CircleConst *left, luci::CircleConst *right)
{
if (not compare_quant_params(left, right))
return false;
if (not compare_dim_values(left, right))
return false;
for (uint32_t i = 0; i < left->size<DT>(); ++i)
{
if (left->at<DT>(i) != right->at<DT>(i))
return false;
}
return true;
}
} // namespace
namespace luci
{
bool RemoveDuplicateConstPass::remove_duplicate_const()
{
bool changed = false;
for (auto &cur_pair : _sum_to_const)
{
// if single const - continue
if (cur_pair.second.size() == 1)
continue;
for (auto reference_const : cur_pair.second)
{
if (reference_const == nullptr)
continue;
for (uint32_t i = 0; i < cur_pair.second.size(); ++i)
{
auto cur_const = cur_pair.second.at(i);
if (cur_const == nullptr or cur_const == reference_const)
continue;
if (cur_const->dtype() != reference_const->dtype())
continue;
bool is_equal = false;
switch (cur_const->dtype())
{
case loco::DataType::FLOAT32:
is_equal = is_equal_consts<loco::DataType::FLOAT32>(reference_const, cur_const);
break;
case loco::DataType::S32:
is_equal = is_equal_consts<loco::DataType::S32>(reference_const, cur_const);
break;
case loco::DataType::S16:
is_equal = is_equal_consts<loco::DataType::S16>(reference_const, cur_const);
break;
case loco::DataType::S8:
is_equal = is_equal_consts<loco::DataType::S8>(reference_const, cur_const);
break;
case loco::DataType::U8:
is_equal = is_equal_consts<loco::DataType::U8>(reference_const, cur_const);
break;
default:
continue;
}
if (not is_equal)
continue;
loco::replace(cur_const).with(reference_const);
// Remove from next checking
cur_pair.second[i] = nullptr;
changed = true;
}
}
}
return changed;
}
template <loco::DataType DT>
void RemoveDuplicateConstPass::add_to_map(luci::CircleConst *const_node)
{
const auto const_size = const_node->size<DT>();
float sum = 0.0;
for (uint32_t i = 0; i < const_size; ++i)
{
sum += const_node->at<DT>(i);
}
if (_sum_to_const.find(sum) == _sum_to_const.end())
{
_sum_to_const[sum] = {const_node};
}
else
{
_sum_to_const.at(sum).push_back(const_node);
}
}
/**
* Remove duplicate Const nodes.
*
* BEFORE
* [CircleNode] [CircleConst]
* | /
* | /
* [CircleNode] [CircleConst]
* | /
* | /
* [CircleNode]
*
* AFTER
*
* [CircleNode] [CircleConst]
* | / /
* | / /
* [CircleNode] /
* | /
* | /
* [CircleNode]
*
*/
bool RemoveDuplicateConstPass::run(loco::Graph *g)
{
for (auto node : loco::active_nodes(loco::output_nodes(g)))
{
auto const_node = dynamic_cast<luci::CircleConst *>(node);
if (const_node == nullptr)
continue;
switch (const_node->dtype())
{
case loco::DataType::FLOAT32:
add_to_map<loco::DataType::FLOAT32>(const_node);
break;
case loco::DataType::S32:
add_to_map<loco::DataType::S32>(const_node);
break;
case loco::DataType::S16:
add_to_map<loco::DataType::S16>(const_node);
break;
case loco::DataType::S8:
add_to_map<loco::DataType::S8>(const_node);
break;
case loco::DataType::U8:
add_to_map<loco::DataType::U8>(const_node);
break;
default:
continue;
}
}
return remove_duplicate_const();
}
} // namespace luci
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