1 // Copyright (c) 2021 Alastair F. Donaldson 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef SOURCE_REDUCE_STRUCTURED_CONSTRUCT_TO_BLOCK_REDUCTION_OPPORTUNITY_H_ 16 #define SOURCE_REDUCE_STRUCTURED_CONSTRUCT_TO_BLOCK_REDUCTION_OPPORTUNITY_H_ 17 18 #include "source/opt/ir_context.h" 19 #include "source/reduce/reduction_opportunity.h" 20 21 namespace spvtools { 22 namespace reduce { 23 24 // An opportunity to replace a skeletal structured control flow construct with a 25 // single block. 26 class StructuredConstructToBlockReductionOpportunity 27 : public ReductionOpportunity { 28 public: 29 // Constructs an opportunity from a header block id. StructuredConstructToBlockReductionOpportunity(opt::IRContext * context,uint32_t construct_header)30 StructuredConstructToBlockReductionOpportunity(opt::IRContext* context, 31 uint32_t construct_header) 32 : context_(context), construct_header_(construct_header) {} 33 34 // Returns true if and only if |construct_header_| exists in the module - 35 // another opportunity may have removed it. 36 bool PreconditionHolds() override; 37 38 protected: 39 void Apply() override; 40 41 private: 42 opt::IRContext* context_; 43 uint32_t construct_header_; 44 }; 45 46 } // namespace reduce 47 } // namespace spvtools 48 49 #endif // SOURCE_REDUCE_STRUCTURED_CONSTRUCT_TO_BLOCK_REDUCTION_OPPORTUNITY_H_ 50