| // Copyright (c) 2019 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_ |
| #define SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_ |
| |
| #include "source/fuzz/protobufs/spirvfuzz_protobufs.h" |
| #include "source/fuzz/transformation.h" |
| #include "source/fuzz/transformation_context.h" |
| #include "source/opt/ir_context.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| class TransformationReplaceIdWithSynonym : public Transformation { |
| public: |
| explicit TransformationReplaceIdWithSynonym( |
| const protobufs::TransformationReplaceIdWithSynonym& message); |
| |
| TransformationReplaceIdWithSynonym( |
| protobufs::IdUseDescriptor id_use_descriptor, uint32_t synonymous_id); |
| |
| // - The fact manager must know that the id identified by |
| // |message_.id_use_descriptor| is synonomous with |message_.synonymous_id|. |
| // - Replacing the id in |message_.id_use_descriptor| by |
| // |message_.synonymous_id| must respect SPIR-V's rules about uses being |
| // dominated by their definitions. |
| // - The id use must be replaceable in principle. See |
| // fuzzerutil::IdUseCanBeReplaced for details. |
| // - |fresh_id_for_temporary| must be 0. |
| bool IsApplicable( |
| opt::IRContext* ir_context, |
| const TransformationContext& transformation_context) const override; |
| |
| // Replaces the use identified by |message_.id_use_descriptor| with the |
| // synonymous id identified by |message_.synonymous_id|. |
| void Apply(opt::IRContext* ir_context, |
| TransformationContext* transformation_context) const override; |
| |
| std::unordered_set<uint32_t> GetFreshIds() const override; |
| |
| protobufs::Transformation ToMessage() const override; |
| |
| // Returns true if |type_id_1| and |type_id_2| represent compatible types |
| // given the context of the instruction with |opcode| (i.e. we can replace |
| // an operand of |opcode| of the first type with an id of the second type |
| // and vice-versa). |
| static bool TypesAreCompatible(opt::IRContext* ir_context, SpvOp opcode, |
| uint32_t use_in_operand_index, |
| uint32_t type_id_1, uint32_t type_id_2); |
| |
| private: |
| // Returns true if the instruction with opcode |opcode| does not change its |
| // behaviour depending on the signedness of the operand at |
| // |use_in_operand_index|. |
| // Assumes that the operand must be the id of an integer scalar or vector. |
| static bool IsAgnosticToSignednessOfOperand(SpvOp opcode, |
| uint32_t use_in_operand_index); |
| |
| protobufs::TransformationReplaceIdWithSynonym message_; |
| }; |
| |
| } // namespace fuzz |
| } // namespace spvtools |
| |
| #endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_ID_WITH_SYNONYM_H_ |