| // 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_phi_operands.h" |
| |
| #include <numeric> |
| #include <vector> |
| |
| #include "source/fuzz/fuzzer_context.h" |
| #include "source/fuzz/fuzzer_util.h" |
| #include "source/fuzz/instruction_descriptor.h" |
| #include "source/fuzz/transformation_permute_phi_operands.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| FuzzerPassPermutePhiOperands::FuzzerPassPermutePhiOperands( |
| 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 FuzzerPassPermutePhiOperands::Apply() { |
| ForEachInstructionWithInstructionDescriptor( |
| [this](opt::Function* /*unused*/, opt::BasicBlock* /*unused*/, |
| opt::BasicBlock::iterator inst_it, |
| const protobufs::InstructionDescriptor& /*unused*/) { |
| const auto& inst = *inst_it; |
| |
| if (inst.opcode() != SpvOpPhi) { |
| return; |
| } |
| |
| if (!GetFuzzerContext()->ChoosePercentage( |
| GetFuzzerContext()->GetChanceOfPermutingPhiOperands())) { |
| return; |
| } |
| |
| // Create a vector of indices for each pair of operands in the |inst|. |
| // OpPhi always has an even number of operands. |
| std::vector<uint32_t> permutation(inst.NumInOperands() / 2); |
| std::iota(permutation.begin(), permutation.end(), 0); |
| GetFuzzerContext()->Shuffle(&permutation); |
| |
| ApplyTransformation(TransformationPermutePhiOperands( |
| inst.result_id(), std::move(permutation))); |
| }); |
| } |
| |
| } // namespace fuzz |
| } // namespace spvtools |