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_FUZZER_PASS_APPLY_ID_SYNONYMS_H_ 16 #define SOURCE_FUZZ_FUZZER_PASS_APPLY_ID_SYNONYMS_H_ 17 18 #include "source/fuzz/fuzzer_pass.h" 19 #include "source/opt/ir_context.h" 20 21 namespace spvtools { 22 namespace fuzz { 23 24 // A pass that replaces ids with other ids, or accesses into structures, that 25 // are known to hold the same values. 26 class FuzzerPassApplyIdSynonyms : public FuzzerPass { 27 public: 28 FuzzerPassApplyIdSynonyms(opt::IRContext* ir_context, 29 TransformationContext* transformation_context, 30 FuzzerContext* fuzzer_context, 31 protobufs::TransformationSequence* transformations); 32 33 void Apply() override; 34 35 private: 36 // Returns true if uses of |dd1| can be replaced with |dd2| and vice-versa 37 // with respect to the type. Concretely, returns true if |dd1| and |dd2| have 38 // the same type or both |dd1| and |dd2| are either a numerical or a vector 39 // type of integral components with possibly different signedness. 40 bool DataDescriptorsHaveCompatibleTypes(SpvOp opcode, 41 uint32_t use_in_operand_index, 42 const protobufs::DataDescriptor& dd1, 43 const protobufs::DataDescriptor& dd2); 44 }; 45 46 } // namespace fuzz 47 } // namespace spvtools 48 49 #endif // SOURCE_FUZZ_FUZZER_PASS_APPLY_ID_SYNONYMS_H_ 50