1 // Copyright (c) 2019 Google LLC 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_FUZZ_FACT_MANAGER_DEAD_BLOCK_FACTS_H_ 16 #define SOURCE_FUZZ_FACT_MANAGER_DEAD_BLOCK_FACTS_H_ 17 18 #include <unordered_set> 19 20 #include "source/fuzz/protobufs/spirvfuzz_protobufs.h" 21 #include "source/opt/ir_context.h" 22 23 namespace spvtools { 24 namespace fuzz { 25 namespace fact_manager { 26 27 // The purpose of this class is to group the fields and data used to represent 28 // facts about data blocks. 29 class DeadBlockFacts { 30 public: 31 explicit DeadBlockFacts(opt::IRContext* ir_context); 32 33 // Marks |fact.block_id()| as being dead. Returns true if |fact.block_id()| 34 // represents a result id of some OpLabel instruction in |ir_context_|. 35 // Returns false otherwise. 36 bool MaybeAddFact(const protobufs::FactBlockIsDead& fact); 37 38 // See method in FactManager which delegates to this method. 39 bool BlockIsDead(uint32_t block_id) const; 40 41 // Returns a set of all the block ids that have been declared dead. 42 const std::unordered_set<uint32_t>& GetDeadBlocks() const; 43 44 private: 45 std::unordered_set<uint32_t> dead_block_ids_; 46 opt::IRContext* ir_context_; 47 }; 48 49 } // namespace fact_manager 50 } // namespace fuzz 51 } // namespace spvtools 52 53 #endif // SOURCE_FUZZ_FACT_MANAGER_DEAD_BLOCK_FACTS_H_ 54