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/*
* Copyright (c) 2018 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 "FreeInstrElimination.h"
#include <cassert>
#include <set>
namespace
{
/**
* @brief Return the set of "free" instructions in a given module
*/
std::set<coco::Instr *> free_instrs(const coco::Module *m)
{
std::set<coco::Instr *> res;
for (uint32_t n = 0; n < m->entity()->instr()->size(); ++n)
{
if (auto ins = m->entity()->instr()->at(n))
{
if (ins->parent() == nullptr)
{
res.insert(ins);
}
}
}
return res;
}
void destroy(coco::Instr *ins)
{
auto m = ins->module();
m->entity()->instr()->destroy(ins);
}
} // namespace
namespace enco
{
void eliminate_free_instr(coco::Module *m)
{
for (auto ins : free_instrs(m))
{
destroy(ins);
}
}
} // namespace enco
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