| // Copyright (c) 2017 The Khronos Group Inc. |
| // Copyright (c) 2017 Valve Corporation |
| // Copyright (c) 2017 LunarG Inc. |
| // |
| // 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. |
| |
| #ifndef SOURCE_OPT_BLOCK_MERGE_PASS_H_ |
| #define SOURCE_OPT_BLOCK_MERGE_PASS_H_ |
| |
| #include <algorithm> |
| #include <map> |
| #include <queue> |
| #include <unordered_map> |
| #include <unordered_set> |
| #include <utility> |
| |
| #include "source/opt/basic_block.h" |
| #include "source/opt/def_use_manager.h" |
| #include "source/opt/ir_context.h" |
| #include "source/opt/module.h" |
| #include "source/opt/pass.h" |
| |
| namespace spvtools { |
| namespace opt { |
| |
| // See optimizer.hpp for documentation. |
| class BlockMergePass : public Pass { |
| public: |
| BlockMergePass(); |
| const char* name() const override { return "merge-blocks"; } |
| Status Process() override; |
| |
| IRContext::Analysis GetPreservedAnalyses() override { |
| return IRContext::kAnalysisDefUse | |
| IRContext::kAnalysisInstrToBlockMapping | |
| IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators | |
| IRContext::kAnalysisNameMap | IRContext::kAnalysisConstants | |
| IRContext::kAnalysisTypes; |
| } |
| |
| private: |
| // Search |func| for blocks which have a single Branch to a block |
| // with no other predecessors. Merge these blocks into a single block. |
| bool MergeBlocks(Function* func); |
| }; |
| |
| } // namespace opt |
| } // namespace spvtools |
| |
| #endif // SOURCE_OPT_BLOCK_MERGE_PASS_H_ |