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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/ResolveCustomOpSplitVPass.h"
#include <luci/IR/CircleNodes.h>
#include <luci/Profile/CircleNodeOrigin.h>
#include <luci/Service/Nodes/CircleConst.h>
namespace
{
// Input node is const S64
// Return s32 version of node
// Return nullptr if s64 value is out of range of s32
luci::CircleConst *s64_to_s32(luci::CircleConst *node)
{
assert(node);
assert(node->dtype() == loco::DataType::S64);
auto cloned = luci::clone(node);
luci::add_origin(cloned, luci::get_origin(node));
const auto num_elems = node->size<loco::DataType::S64>();
cloned->dtype(loco::DataType::S32);
cloned->size<loco::DataType::S32>(num_elems);
for (uint32_t i = 0; i < num_elems; i++)
{
int64_t val = node->at<loco::DataType::S64>(i);
if (val < std::numeric_limits<int32_t>::min() or val > std::numeric_limits<int32_t>::max())
return nullptr;
cloned->at<loco::DataType::S32>(i) = static_cast<int32_t>(val);
}
return cloned;
}
/** BEFORE
*
* [CircleNode]
* \
* \ [size_splits] [split_dim]
* \ | /
* [CircleCustom(SplitV))]
* |
* [CircleCustomOut]
* |
* [CircleNode]
*
* AFTER
*
* [CircleNode]
* | \
* | \ [size_splits] [split_dim]
* | \ | /
* | \ | /
* | \ | /
* [CircleCustom(SplitV)] [CircleSplitV]
* | |
* [CircleCustomOut] [CircleSplitVOut]
* |
* [CircleNode]
*/
bool resolve_splitv(luci::CircleCustom *node)
{
const std::string custom_code = node->custom_code();
const std::vector<uint8_t> custom_options = node->custom_options();
if (custom_code != "SplitV")
return false;
if (node->numInputs() != 3)
return false;
auto size_splits = dynamic_cast<luci::CircleConst *>(node->inputs(1));
if (not size_splits)
return false;
// Convert size_splits to S32, because luci-interpeter does not support
// S64 size_splits yet
// TODO Support S64 size_splits
if (size_splits->dtype() == loco::DataType::S64)
{
size_splits = s64_to_s32(size_splits);
if (not size_splits)
return false;
}
if (size_splits->dtype() != loco::DataType::S32)
return false;
auto split_dim = dynamic_cast<luci::CircleConst *>(node->inputs(2));
if (not split_dim)
return false;
if (split_dim->dtype() == loco::DataType::S64)
{
split_dim = s64_to_s32(split_dim);
if (not split_dim)
return false;
}
if (split_dim->dtype() != loco::DataType::S32)
return false;
if (size_splits->rank() != 1)
return false;
const auto num_split = size_splits->dim(0).value();
auto split_v = node->graph()->nodes()->create<luci::CircleSplitV>();
split_v->input(node->inputs(0));
split_v->size_splits(size_splits);
split_v->split_dim(split_dim);
split_v->num_split(num_split);
split_v->name(node->name());
luci::add_origin(split_v, luci::get_origin(node));
int32_t i = 0;
const auto succs = loco::succs(node);
for (auto succ : succs)
{
auto custom_out = loco::must_cast<luci::CircleCustomOut *>(succ); // FIX_CALLER_UNLESS
auto split_v_out = node->graph()->nodes()->create<luci::CircleSplitVOut>();
split_v_out->input(split_v);
split_v_out->name(node->name() + "_out_" + std::to_string(i));
split_v_out->index(i++);
luci::add_origin(split_v_out, luci::get_origin(node));
loco::replace(custom_out).with(split_v_out);
}
return true;
}
} // namespace
namespace luci
{
bool ResolveCustomOpSplitVPass::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;
if (resolve_splitv(cop))
changed = true;
}
return changed;
}
} // namespace luci
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