| // Copyright (c) 2020 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_ACCESS_CHAIN_H_ |
| #define SOURCE_FUZZ_TRANSFORMATION_ACCESS_CHAIN_H_ |
| |
| #include <utility> |
| |
| #include "source/fuzz/fact_manager.h" |
| #include "source/fuzz/protobufs/spirvfuzz_protobufs.h" |
| #include "source/fuzz/transformation.h" |
| #include "source/opt/ir_context.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| class TransformationAccessChain : public Transformation { |
| public: |
| explicit TransformationAccessChain( |
| const protobufs::TransformationAccessChain& message); |
| |
| TransformationAccessChain( |
| uint32_t fresh_id, uint32_t pointer_id, |
| const std::vector<uint32_t>& index_id, |
| const protobufs::InstructionDescriptor& instruction_to_insert_before); |
| |
| // - |message_.fresh_id| must be fresh |
| // - |message_.instruction_to_insert_before| must identify an instruction |
| // before which it is legitimate to insert an OpAccessChain instruction |
| // - |message_.pointer_id| must be a result id with pointer type that is |
| // available (according to dominance rules) at the insertion point. |
| // - The pointer must not be OpConstantNull or OpUndef |
| // - |message_.index_id| must be a sequence of ids of 32-bit integer constants |
| // such that it is possible to walk the pointee type of |
| // |message_.pointer_id| using these indices, remaining in-bounds. |
| // - If type t is the final type reached by walking these indices, the module |
| // must include an instruction "OpTypePointer SC %t" where SC is the storage |
| // class associated with |message_.pointer_id| |
| bool IsApplicable(opt::IRContext* context, |
| const FactManager& fact_manager) const override; |
| |
| // Adds an instruction of the form: |
| // |message_.fresh_id| = OpAccessChain %ptr |message_.index_id| |
| // where %ptr is the result if of an instruction declaring a pointer to the |
| // type reached by walking the pointee type of |message_.pointer_id| using |
| // the indices in |message_.index_id|, and with the same storage class as |
| // |message_.pointer_id|. |
| // |
| // If |fact_manager| reports that |message_.pointer_id| has an irrelevant |
| // pointee value, then the fact that |message_.fresh_id| (the result of the |
| // access chain) also has an irrelevant pointee value is also recorded. |
| void Apply(opt::IRContext* context, FactManager* fact_manager) const override; |
| |
| protobufs::Transformation ToMessage() const override; |
| |
| private: |
| // Returns {false, 0} if |index_id| does not correspond to a 32-bit integer |
| // constant. Otherwise, returns {true, value}, where value is the value of |
| // the 32-bit integer constant to which |index_id| corresponds. |
| std::pair<bool, uint32_t> GetIndexValue(opt::IRContext* context, |
| uint32_t index_id) const; |
| |
| protobufs::TransformationAccessChain message_; |
| }; |
| |
| } // namespace fuzz |
| } // namespace spvtools |
| |
| #endif // SOURCE_FUZZ_TRANSFORMATION_ACCESS_CHAIN_H_ |