| // Copyright (c) 2019 Google LLC |
| // |
| // 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_add_dead_continues.h" |
| |
| #include "source/fuzz/transformation_add_dead_continue.h" |
| #include "source/opt/ir_context.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| FuzzerPassAddDeadContinues::FuzzerPassAddDeadContinues( |
| opt::IRContext* ir_context, FactManager* fact_manager, |
| FuzzerContext* fuzzer_context, |
| protobufs::TransformationSequence* transformations) |
| : FuzzerPass(ir_context, fact_manager, fuzzer_context, transformations) {} |
| |
| FuzzerPassAddDeadContinues::~FuzzerPassAddDeadContinues() = default; |
| |
| void FuzzerPassAddDeadContinues::Apply() { |
| // Consider every block in every function. |
| for (auto& function : *GetIRContext()->module()) { |
| for (auto& block : function) { |
| // Make a transformation to add a dead continue from this node; if the |
| // node turns out to be inappropriate (e.g. by not being in a loop) the |
| // precondition for the transformation will fail and it will be ignored. |
| // |
| // TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2856): right |
| // now we completely ignore OpPhi instructions at continue targets. |
| // This will lead to interesting opportunities being missed. |
| auto candidate_transformation = TransformationAddDeadContinue( |
| block.id(), GetFuzzerContext()->ChooseEven(), {}); |
| // Probabilistically decide whether to apply the transformation in the |
| // case that it is applicable. |
| if (candidate_transformation.IsApplicable(GetIRContext(), |
| *GetFactManager()) && |
| GetFuzzerContext()->ChoosePercentage( |
| GetFuzzerContext()->GetChanceOfAddingDeadContinue())) { |
| candidate_transformation.Apply(GetIRContext(), GetFactManager()); |
| *GetTransformations()->add_transformation() = |
| candidate_transformation.ToMessage(); |
| } |
| } |
| } |
| } |
| |
| } // namespace fuzz |
| } // namespace spvtools |