| // 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_REPLACE_LOAD_STORE_WITH_COPY_MEMORY_H_ |
| #define SOURCE_FUZZ_TRANSFORMATION_REPLACE_LOAD_STORE_WITH_COPY_MEMORY_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 TransformationReplaceLoadStoreWithCopyMemory : public Transformation { |
| public: |
| explicit TransformationReplaceLoadStoreWithCopyMemory( |
| protobufs::TransformationReplaceLoadStoreWithCopyMemory message); |
| |
| TransformationReplaceLoadStoreWithCopyMemory( |
| const protobufs::InstructionDescriptor& load_instruction_descriptor, |
| const protobufs::InstructionDescriptor& store_instruction_descriptor); |
| |
| // - |message_.load_instruction_descriptor| must identify an OpLoad |
| // instruction. |
| // - |message_.store_instruction_descriptor| must identify an OpStore |
| // instruction. |
| // - The OpStore must write the intermediate value loaded by the OpLoad. |
| // - The OpLoad and the OpStore must not have certain instruction in between |
| // (checked by IsMemoryWritingOpCode(), IsMemoryBarrierOpCode(), |
| // IsStorageClassSafeAcrossMemoryBarriers()). |
| bool IsApplicable( |
| opt::IRContext* ir_context, |
| const TransformationContext& transformation_context) const override; |
| |
| // Takes a pair of instruction descriptors to OpLoad and OpStore that have the |
| // same intermediate value and replaces the OpStore with an equivalent |
| // OpCopyMemory. |
| void Apply(opt::IRContext* ir_context, |
| TransformationContext* transformation_context) const override; |
| |
| // Checks if the instruction that has an |op_code| might write to |
| // the source operand of the OpLoad instruction. |
| static bool IsMemoryWritingOpCode(spv::Op op_code); |
| |
| // Checks if the instruction that has an |op_code| is a memory barrier that |
| // could interfere with the source operand of the OpLoad instruction |
| static bool IsMemoryBarrierOpCode(spv::Op op_code); |
| |
| // Checks if the |storage_class| of the source operand of the OpLoad |
| // instruction implies that this variable cannot change (due to other threads) |
| // across memory barriers. |
| static bool IsStorageClassSafeAcrossMemoryBarriers( |
| spv::StorageClass storage_class); |
| |
| std::unordered_set<uint32_t> GetFreshIds() const override; |
| |
| protobufs::Transformation ToMessage() const override; |
| |
| private: |
| protobufs::TransformationReplaceLoadStoreWithCopyMemory message_; |
| }; |
| |
| } // namespace fuzz |
| } // namespace spvtools |
| |
| #endif // SOURCE_FUZZ_TRANSFORMATION_REPLACE_LOAD_STORE_WITH_COPY_MEMORY_H_ |