| // 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_ADD_LOOP_PREHEADER_H |
| #define SOURCE_FUZZ_TRANSFORMATION_ADD_LOOP_PREHEADER_H |
| |
| #include "source/fuzz/transformation.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| class TransformationAddLoopPreheader : public Transformation { |
| public: |
| explicit TransformationAddLoopPreheader( |
| protobufs::TransformationAddLoopPreheader message); |
| |
| TransformationAddLoopPreheader(uint32_t loop_header_block, uint32_t fresh_id, |
| std::vector<uint32_t> phi_id); |
| |
| // - |message_.loop_header_block| must be the id of a loop header block in |
| // the given module. |
| // - |message_.fresh_id| must be an available id. |
| // - |message_.phi_ids| must be a list of available ids. |
| // It can be empty if the loop header only has one predecessor outside of |
| // the loop. Otherwise, it must contain at least as many ids as OpPhi |
| // instructions in the loop header block. |
| bool IsApplicable( |
| opt::IRContext* ir_context, |
| const TransformationContext& transformation_context) const override; |
| |
| // Adds a preheader block as the unique out-of-loop predecessor of the given |
| // loop header block. All of the existing out-of-loop predecessors of the |
| // header are changed so that they branch to the preheader instead. |
| void Apply(opt::IRContext* ir_context, |
| TransformationContext* transformation_context) const override; |
| |
| std::unordered_set<uint32_t> GetFreshIds() const override; |
| |
| protobufs::Transformation ToMessage() const override; |
| |
| private: |
| protobufs::TransformationAddLoopPreheader message_; |
| }; |
| |
| } // namespace fuzz |
| } // namespace spvtools |
| |
| #endif // SOURCE_FUZZ_TRANSFORMATION_ADD_LOOP_PREHEADER_H |