1 // Copyright (c) 2020 Vasyl Teliman 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_TRANSFORMATION_INVERT_COMPARISON_OPERATOR_H_ 16 #define SOURCE_FUZZ_TRANSFORMATION_INVERT_COMPARISON_OPERATOR_H_ 17 18 #include "source/fuzz/protobufs/spirvfuzz_protobufs.h" 19 #include "source/fuzz/transformation.h" 20 #include "source/fuzz/transformation_context.h" 21 #include "source/opt/ir_context.h" 22 23 namespace spvtools { 24 namespace fuzz { 25 26 class TransformationInvertComparisonOperator : public Transformation { 27 public: 28 explicit TransformationInvertComparisonOperator( 29 protobufs::TransformationInvertComparisonOperator message); 30 31 TransformationInvertComparisonOperator(uint32_t operator_id, 32 uint32_t fresh_id); 33 34 // - |operator_id| should be a result id of some instruction for which 35 // IsInversionSupported returns true. 36 // - |fresh_id| must be a fresh id. 37 bool IsApplicable( 38 opt::IRContext* ir_context, 39 const TransformationContext& transformation_context) const override; 40 41 // Inverts the opcode of the instruction with result id |operator_id| (e.g >= 42 // becomes <) and inserts OpLogicalNot instruction after |operator_id|. Also, 43 // changes the result id of OpLogicalNot to |operator_id| and the result id of 44 // the inverted operator to |fresh_id|. 45 void Apply(opt::IRContext* ir_context, 46 TransformationContext* transformation_context) const override; 47 48 std::unordered_set<uint32_t> GetFreshIds() const override; 49 50 protobufs::Transformation ToMessage() const override; 51 52 // Returns true if |opcode| is supported by this transformation. 53 static bool IsInversionSupported(SpvOp opcode); 54 55 private: 56 // Returns an inverted |opcode| (e.g. < becomes >=, == becomes != etc.) 57 static SpvOp InvertOpcode(SpvOp opcode); 58 59 protobufs::TransformationInvertComparisonOperator message_; 60 }; 61 62 } // namespace fuzz 63 } // namespace spvtools 64 65 #endif // SOURCE_FUZZ_TRANSFORMATION_INVERT_COMPARISON_OPERATOR_H_ 66