1 /* 2 * Copyright (C) 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_SEA_IR_IR_SEA_NODE_H_ 18 #define ART_COMPILER_SEA_IR_IR_SEA_NODE_H_ 19 20 #include "base/stringprintf.h" 21 22 namespace sea_ir { 23 class Region; 24 class IRVisitor; 25 26 class IVisitable { 27 public: 28 virtual void Accept(IRVisitor* visitor) = 0; ~IVisitable()29 virtual ~IVisitable() {} 30 }; 31 32 // This abstract class provides the essential services that 33 // we want each SEA IR element to have. 34 // At the moment, these are: 35 // - an id and corresponding string representation. 36 // - a .dot graph language representation for .dot output. 37 // 38 // Note that SEA IR nodes could also be Regions, Projects 39 // which are not instructions. 40 class SeaNode: public IVisitable { 41 public: SeaNode()42 explicit SeaNode():id_(GetNewId()), string_id_() { 43 string_id_ = art::StringPrintf("%d", id_); 44 } 45 46 // Adds CFG predecessors and successors to each block. 47 void AddSuccessor(Region* successor); 48 void AddPredecessor(Region* predecesor); 49 50 // Returns the id of the current block as string StringId()51 const std::string& StringId() const { 52 return string_id_; 53 } 54 // Returns the id of this node as int. The id is supposed to be unique among 55 // all instances of all subclasses of this class. Id()56 int Id() const { 57 return id_; 58 } 59 ~SeaNode()60 virtual ~SeaNode() { } 61 62 protected: GetNewId()63 static int GetNewId() { 64 return current_max_node_id_++; 65 } 66 67 const int id_; 68 std::string string_id_; 69 70 private: 71 static int current_max_node_id_; 72 // Creating new instances of sea node objects should not be done through copy or assignment 73 // operators because that would lead to duplication of their unique ids. 74 DISALLOW_COPY_AND_ASSIGN(SeaNode); 75 }; 76 } // namespace sea_ir 77 #endif // ART_COMPILER_SEA_IR_IR_SEA_NODE_H_ 78