| // Copyright (c) 2020 Vasyl Teliman |
| // |
| // 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. |
| |
| #include "source/fuzz/fuzzer_pass_permute_instructions.h" |
| |
| #include "source/fuzz/fuzzer_context.h" |
| #include "source/fuzz/fuzzer_util.h" |
| #include "source/fuzz/instruction_descriptor.h" |
| #include "source/fuzz/transformation_move_instruction_down.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| FuzzerPassPermuteInstructions::FuzzerPassPermuteInstructions( |
| opt::IRContext* ir_context, TransformationContext* transformation_context, |
| FuzzerContext* fuzzer_context, |
| protobufs::TransformationSequence* transformations, |
| bool ignore_inapplicable_transformations) |
| : FuzzerPass(ir_context, transformation_context, fuzzer_context, |
| transformations, ignore_inapplicable_transformations) {} |
| |
| void FuzzerPassPermuteInstructions::Apply() { |
| // We are iterating over all instructions in all basic blocks. |
| for (auto& function : *GetIRContext()->module()) { |
| for (auto& block : function) { |
| // We need to collect all instructions in the block into a separate vector |
| // since application of the transformation below might invalidate |
| // iterators. |
| std::vector<opt::Instruction*> instructions; |
| for (auto& instruction : block) { |
| instructions.push_back(&instruction); |
| } |
| |
| // We consider all instructions in reverse to increase the possible number |
| // of applied transformations. |
| for (auto it = instructions.rbegin(); it != instructions.rend(); ++it) { |
| if (!GetFuzzerContext()->ChoosePercentage( |
| GetFuzzerContext()->GetChanceOfPermutingInstructions())) { |
| continue; |
| } |
| |
| while (MaybeApplyTransformation(TransformationMoveInstructionDown( |
| MakeInstructionDescriptor(GetIRContext(), *it)))) { |
| // Apply the transformation as many times as possible. |
| } |
| } |
| } |
| } |
| } |
| |
| } // namespace fuzz |
| } // namespace spvtools |
