mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
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// Copyright (c) 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_REDUCE_REMOVE_SELECTION_REDUCTION_OPPORTUNITY_FINDER_H_
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#define SOURCE_REDUCE_REMOVE_SELECTION_REDUCTION_OPPORTUNITY_FINDER_H_
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#include "source/reduce/reduction_opportunity_finder.h"
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namespace spvtools {
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namespace reduce {
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// A finder for opportunities for removing a selection construct by simply
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// removing the OpSelectionMerge instruction; thus, the selections must have
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// already been simplified to a point where they can be trivially removed.
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class RemoveSelectionReductionOpportunityFinder
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: public ReductionOpportunityFinder {
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public:
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RemoveSelectionReductionOpportunityFinder() = default;
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~RemoveSelectionReductionOpportunityFinder() override = default;
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std::string GetName() const final;
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std::vector<std::unique_ptr<ReductionOpportunity>> GetAvailableOpportunities(
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opt::IRContext* context) const final;
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// Returns true if the OpSelectionMerge instruction |merge_instruction| in
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// block |header_block| can be removed.
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static bool CanOpSelectionMergeBeRemoved(
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opt::IRContext* context, const opt::BasicBlock& header_block,
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opt::Instruction* merge_instruction,
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std::unordered_set<uint32_t> merge_and_continue_blocks_from_loops);
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};
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} // namespace reduce
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} // namespace spvtools
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#endif // SOURCE_REDUCE_REMOVE_SELECTION_REDUCTION_OPPORTUNITY_FINDER_H_
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