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_IRRELEVANT_VALUE_FACTS_H_ 16 #define SOURCE_FUZZ_FACT_MANAGER_IRRELEVANT_VALUE_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 // Forward reference to the DataSynonymAndIdEquationFacts class. 28 class DataSynonymAndIdEquationFacts; 29 // Forward reference to the DeadBlockFacts class. 30 class DeadBlockFacts; 31 32 // The purpose of this class is to group the fields and data used to represent 33 // facts about various irrelevant values in the module. 34 class IrrelevantValueFacts { 35 public: 36 explicit IrrelevantValueFacts(opt::IRContext* ir_context); 37 38 // See method in FactManager which delegates to this method. Returns true if 39 // |fact.pointer_id()| is a result id of pointer type in the |ir_context_| and 40 // |fact.pointer_id()| does not participate in DataSynonym facts. Returns 41 // false otherwise. |data_synonym_and_id_equation_facts| and |context| are 42 // passed for consistency checks. 43 bool MaybeAddFact( 44 const protobufs::FactPointeeValueIsIrrelevant& fact, 45 const DataSynonymAndIdEquationFacts& data_synonym_and_id_equation_facts); 46 47 // See method in FactManager which delegates to this method. Returns true if 48 // |fact.result_id()| is a result id of non-pointer type in the |ir_context_| 49 // and |fact.result_id()| does not participate in DataSynonym facts. Returns 50 // false otherwise. |data_synonym_and_id_equation_facts| and |context| are 51 // passed for consistency checks. 52 bool MaybeAddFact( 53 const protobufs::FactIdIsIrrelevant& fact, 54 const DataSynonymAndIdEquationFacts& data_synonym_and_id_equation_facts); 55 56 // See method in FactManager which delegates to this method. 57 bool PointeeValueIsIrrelevant(uint32_t pointer_id) const; 58 59 // See method in FactManager which delegates to this method. 60 // |dead_block_facts| and |context| are passed to check whether |result_id| is 61 // declared inside a dead block, in which case it is irrelevant. 62 bool IdIsIrrelevant(uint32_t result_id, 63 const DeadBlockFacts& dead_block_facts) const; 64 65 // See method in FactManager which delegates to this method. 66 // |dead_block_facts| and |context| are passed to also add all the ids 67 // declared in dead blocks to the set of irrelevant ids. 68 std::unordered_set<uint32_t> GetIrrelevantIds( 69 const DeadBlockFacts& dead_block_facts) const; 70 71 private: 72 std::unordered_set<uint32_t> pointers_to_irrelevant_pointees_ids_; 73 std::unordered_set<uint32_t> irrelevant_ids_; 74 opt::IRContext* ir_context_; 75 }; 76 77 } // namespace fact_manager 78 } // namespace fuzz 79 } // namespace spvtools 80 81 #endif // SOURCE_FUZZ_FACT_MANAGER_IRRELEVANT_VALUE_FACTS_H_ 82