| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #ifndef ART_COMPILER_OPTIMIZING_GRAPH_CHECKER_H_ |
| #define ART_COMPILER_OPTIMIZING_GRAPH_CHECKER_H_ |
| |
| #include <ostream> |
| |
| #include "base/arena_bit_vector.h" |
| #include "base/bit_vector-inl.h" |
| #include "base/scoped_arena_allocator.h" |
| #include "nodes.h" |
| |
| namespace art { |
| |
| // A control-flow graph visitor performing various checks. |
| class GraphChecker : public HGraphDelegateVisitor { |
| public: |
| explicit GraphChecker(HGraph* graph, const char* dump_prefix = "art::GraphChecker: ") |
| : HGraphDelegateVisitor(graph), |
| errors_(graph->GetAllocator()->Adapter(kArenaAllocGraphChecker)), |
| dump_prefix_(dump_prefix), |
| allocator_(graph->GetArenaStack()), |
| seen_ids_(&allocator_, graph->GetCurrentInstructionId(), false, kArenaAllocGraphChecker) { |
| seen_ids_.ClearAllBits(); |
| } |
| |
| // Check the whole graph (in reverse post-order). |
| void Run() { |
| // VisitReversePostOrder is used instead of VisitInsertionOrder, |
| // as the latter might visit dead blocks removed by the dominator |
| // computation. |
| VisitReversePostOrder(); |
| } |
| |
| void VisitBasicBlock(HBasicBlock* block) OVERRIDE; |
| |
| void VisitInstruction(HInstruction* instruction) OVERRIDE; |
| void VisitPhi(HPhi* phi) OVERRIDE; |
| |
| void VisitBinaryOperation(HBinaryOperation* op) OVERRIDE; |
| void VisitBooleanNot(HBooleanNot* instruction) OVERRIDE; |
| void VisitBoundType(HBoundType* instruction) OVERRIDE; |
| void VisitBoundsCheck(HBoundsCheck* check) OVERRIDE; |
| void VisitCheckCast(HCheckCast* check) OVERRIDE; |
| void VisitCondition(HCondition* op) OVERRIDE; |
| void VisitConstant(HConstant* instruction) OVERRIDE; |
| void VisitDeoptimize(HDeoptimize* instruction) OVERRIDE; |
| void VisitIf(HIf* instruction) OVERRIDE; |
| void VisitInstanceOf(HInstanceOf* check) OVERRIDE; |
| void VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) OVERRIDE; |
| void VisitLoadException(HLoadException* load) OVERRIDE; |
| void VisitNeg(HNeg* instruction) OVERRIDE; |
| void VisitPackedSwitch(HPackedSwitch* instruction) OVERRIDE; |
| void VisitReturn(HReturn* ret) OVERRIDE; |
| void VisitReturnVoid(HReturnVoid* ret) OVERRIDE; |
| void VisitSelect(HSelect* instruction) OVERRIDE; |
| void VisitTryBoundary(HTryBoundary* try_boundary) OVERRIDE; |
| void VisitTypeConversion(HTypeConversion* instruction) OVERRIDE; |
| |
| void HandleLoop(HBasicBlock* loop_header); |
| void HandleBooleanInput(HInstruction* instruction, size_t input_index); |
| |
| // Was the last visit of the graph valid? |
| bool IsValid() const { |
| return errors_.empty(); |
| } |
| |
| // Get the list of detected errors. |
| const ArenaVector<std::string>& GetErrors() const { |
| return errors_; |
| } |
| |
| // Print detected errors on output stream `os`. |
| void Dump(std::ostream& os) const { |
| for (size_t i = 0, e = errors_.size(); i < e; ++i) { |
| os << dump_prefix_ << errors_[i] << std::endl; |
| } |
| } |
| |
| protected: |
| // Report a new error. |
| void AddError(const std::string& error) { |
| errors_.push_back(error); |
| } |
| |
| // The block currently visited. |
| HBasicBlock* current_block_ = nullptr; |
| // Errors encountered while checking the graph. |
| ArenaVector<std::string> errors_; |
| |
| private: |
| // String displayed before dumped errors. |
| const char* const dump_prefix_; |
| ScopedArenaAllocator allocator_; |
| ArenaBitVector seen_ids_; |
| |
| DISALLOW_COPY_AND_ASSIGN(GraphChecker); |
| }; |
| |
| } // namespace art |
| |
| #endif // ART_COMPILER_OPTIMIZING_GRAPH_CHECKER_H_ |