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/*
* Copyright (c) 2020 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/ResolveCustomOpAddPass.h"
#include "flatbuffers/flexbuffers.h"
#include <luci/IR/CircleNodes.h>
#include <luci/IR/AttrFusedActFunc.h>
namespace
{
/// @brief Returns the index of BroadcastTo node among cop's inputs.
// NOTE This function assumes there is only one BroadcastTo node among its inputs.
int32_t get_broadcastTo_index_among_inputs_of(luci::CircleCustom *cop)
{
for (uint32_t idx = 0; idx < cop->numInputs(); idx++)
{
auto input = dynamic_cast<const luci::CircleCustomOut *>(cop->inputs(idx));
if (input)
{
auto broadcastTo = loco::must_cast<luci::CircleCustom *>(input->input());
if (broadcastTo->custom_code() == "BroadcastTo")
return idx;
}
}
return -1;
}
/** BEFORE
* [CircleConst]
* |
* [CircleNode] [BroadcastTo(CircleCustom)]
* \ |
* \ [CircleCustomOUt]
* \ /
* [AddV2(CircleCustom)]
* AFTER
*
* [CircleConst] [CircleNode]
* \ /
* \ /
* [CircleAdd]
*/
bool resolve_with_BroadcastTo(luci::CircleCustom *addv2)
{
int32_t broadcastTo_idx = get_broadcastTo_index_among_inputs_of(addv2);
if (broadcastTo_idx == -1)
return false;
auto input = loco::must_cast<const luci::CircleCustomOut *>(addv2->inputs(broadcastTo_idx));
auto broadcastTo = loco::must_cast<luci::CircleCustom *>(input->input());
auto add = addv2->graph()->nodes()->create<luci::CircleAdd>();
add->fusedActivationFunction(luci::FusedActFunc::NONE);
add->x(addv2->inputs(1 - broadcastTo_idx));
add->y(broadcastTo->inputs(0));
auto customOut = loco::succs(addv2);
assert(customOut.size() == 1);
replace(*customOut.begin()).with(add);
return true;
}
bool resolve_custom_op(luci::CircleCustom *addv2)
{
const std::string custom_code = addv2->custom_code();
const std::vector<uint8_t> custom_options = addv2->custom_options();
if (custom_code != "AddV2")
return false;
if (resolve_with_BroadcastTo(addv2))
return true;
auto add = addv2->graph()->nodes()->create<luci::CircleAdd>();
add->fusedActivationFunction(luci::FusedActFunc::NONE);
add->x(addv2->inputs(0));
add->y(addv2->inputs(1));
auto customOut = loco::succs(addv2);
assert(customOut.size() == 1);
replace(*customOut.begin()).with(add);
return true;
}
} // namespace
namespace luci
{
bool ResolveCustomOpAddPass::run(loco::Graph *g)
{
bool changed = false;
for (auto node : loco::active_nodes(loco::output_nodes(g)))
{
auto cop = dynamic_cast<luci::CircleCustom *>(node);
if (not cop)
continue;
changed |= resolve_custom_op(cop);
}
return changed;
}
} // namespace luci
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