1 // Copyright (c) 2019 Google LLC 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_MERGE_BLOCKS_H_ 16 #define SOURCE_FUZZ_TRANSFORMATION_MERGE_BLOCKS_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 TransformationMergeBlocks : public Transformation { 27 public: 28 explicit TransformationMergeBlocks( 29 const protobufs::TransformationMergeBlocks& message); 30 31 TransformationMergeBlocks(uint32_t block_id); 32 33 // - |message_.block_id| must be the id of a block, b 34 // - b must have a single predecessor, a 35 // - b must be the sole successor of a 36 // - Replacing a with the merge of a and b (and removing b) must lead to a 37 // valid module 38 bool IsApplicable( 39 opt::IRContext* ir_context, 40 const TransformationContext& transformation_context) const override; 41 42 // The contents of b are merged into a, and a's terminator is replaced with 43 // the terminator of b. Block b is removed from the module. 44 void Apply(opt::IRContext* ir_context, 45 TransformationContext* transformation_context) const override; 46 47 std::unordered_set<uint32_t> GetFreshIds() const override; 48 49 protobufs::Transformation ToMessage() const override; 50 51 private: 52 protobufs::TransformationMergeBlocks message_; 53 }; 54 55 } // namespace fuzz 56 } // namespace spvtools 57 58 #endif // SOURCE_FUZZ_TRANSFORMATION_MERGE_BLOCKS_H_ 59