| // Copyright (c) 2017 The Khronos Group Inc. | |
| // Copyright (c) 2017 Valve Corporation | |
| // Copyright (c) 2017 LunarG Inc. | |
| // 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. | |
| #ifndef SOURCE_OPT_BLOCK_MERGE_UTIL_H_ | |
| #define SOURCE_OPT_BLOCK_MERGE_UTIL_H_ | |
| #include "source/opt/ir_context.h" | |
| namespace spvtools { | |
| namespace opt { | |
| // Provides functions for determining when it is safe to merge blocks, and for | |
| // actually merging blocks, for use by various analyses and passes. | |
| namespace blockmergeutil { | |
| // Returns true if and only if |block| has exactly one successor and merging | |
| // this successor into |block| has no impact on the semantics or validity of the | |
| // SPIR-V module. | |
| bool CanMergeWithSuccessor(IRContext* context, BasicBlock* block); | |
| // Requires that |bi| has a successor that can be safely merged into |bi|, and | |
| // performs the merge. | |
| void MergeWithSuccessor(IRContext* context, Function* func, | |
| Function::iterator bi); | |
| } // namespace blockmergeutil | |
| } // namespace opt | |
| } // namespace spvtools | |
| #endif // SOURCE_OPT_BLOCK_MERGE_UTIL_H_ |