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_SPLIT_BLOCK_H_ 16 #define SOURCE_FUZZ_TRANSFORMATION_SPLIT_BLOCK_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 TransformationSplitBlock : public Transformation { 27 public: 28 explicit TransformationSplitBlock( 29 const protobufs::TransformationSplitBlock& message); 30 31 TransformationSplitBlock( 32 const protobufs::InstructionDescriptor& instruction_to_split_before, 33 uint32_t fresh_id); 34 35 // - |message_.base_instruction_id| must be the result id of an instruction 36 // 'base' in some block 'blk'. 37 // - 'blk' must contain an instruction 'inst' located |message_.offset| 38 // instructions after 'base' (if |message_.offset| = 0 then 'inst' = 39 // 'base'). 40 // - Splitting 'blk' at 'inst', so that all instructions from 'inst' onwards 41 // appear in a new block that 'blk' directly jumps to must be valid. 42 // - |message_.fresh_id| must not be used by the module. 43 bool IsApplicable( 44 opt::IRContext* ir_context, 45 const TransformationContext& transformation_context) const override; 46 47 // - A new block with label |message_.fresh_id| is inserted right after 'blk' 48 // in program order. 49 // - All instructions of 'blk' from 'inst' onwards are moved into the new 50 // block. 51 // - 'blk' is made to jump unconditionally to the new block. 52 // - If 'blk' was dead, the new block is also dead. 53 void Apply(opt::IRContext* ir_context, 54 TransformationContext* transformation_context) const override; 55 56 std::unordered_set<uint32_t> GetFreshIds() const override; 57 58 protobufs::Transformation ToMessage() const override; 59 60 private: 61 protobufs::TransformationSplitBlock message_; 62 }; 63 64 } // namespace fuzz 65 } // namespace spvtools 66 67 #endif // SOURCE_FUZZ_TRANSFORMATION_SPLIT_BLOCK_H_ 68