| // Copyright (c) 2020 André Perez Maselco | |
| // | |
| // 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_adjust_branch_weights.h" | |
| #include "source/fuzz/fuzzer_util.h" | |
| #include "source/fuzz/instruction_descriptor.h" | |
| #include "source/fuzz/transformation_adjust_branch_weights.h" | |
| namespace spvtools { | |
| namespace fuzz { | |
| FuzzerPassAdjustBranchWeights::FuzzerPassAdjustBranchWeights( | |
| 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 FuzzerPassAdjustBranchWeights::Apply() { | |
| // For all OpBranchConditional instructions, | |
| // randomly applies the transformation. | |
| GetIRContext()->module()->ForEachInst([this](opt::Instruction* instruction) { | |
| if (instruction->opcode() == spv::Op::OpBranchConditional && | |
| GetFuzzerContext()->ChoosePercentage( | |
| GetFuzzerContext()->GetChanceOfAdjustingBranchWeights())) { | |
| ApplyTransformation(TransformationAdjustBranchWeights( | |
| MakeInstructionDescriptor(GetIRContext(), instruction), | |
| GetFuzzerContext()->GetRandomBranchWeights())); | |
| } | |
| }); | |
| } | |
| } // namespace fuzz | |
| } // namespace spvtools |