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// Copyright (c) 2019 Google LLC
//
// 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 "source/reduce/merge_blocks_reduction_opportunity_finder.h"
#include "source/opt/block_merge_util.h"
#include "source/reduce/merge_blocks_reduction_opportunity.h"
namespace spvtools {
namespace reduce {
std::string MergeBlocksReductionOpportunityFinder::GetName() const {
return "MergeBlocksReductionOpportunityFinder";
}
std::vector<std::unique_ptr<ReductionOpportunity>>
MergeBlocksReductionOpportunityFinder::GetAvailableOpportunities(
opt::IRContext* context, uint32_t target_function) const {
std::vector<std::unique_ptr<ReductionOpportunity>> result;
// Consider every block in every function.
for (auto* function : GetTargetFunctions(context, target_function)) {
for (auto& block : *function) {
// See whether it is possible to merge this block with its successor.
if (opt::blockmergeutil::CanMergeWithSuccessor(context, &block)) {
// It is, so record an opportunity to do this.
result.push_back(spvtools::MakeUnique<MergeBlocksReductionOpportunity>(
context, function, &block));
}
}
}
return result;
}
} // namespace reduce
} // namespace spvtools
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