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/*
* Copyright (C) 2013 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_SEA_IR_IR_SEA_NODE_H_
#define ART_COMPILER_SEA_IR_IR_SEA_NODE_H_
#include "base/stringprintf.h"
namespace sea_ir {
class Region;
class IRVisitor;
class IVisitable {
public:
virtual void Accept(IRVisitor* visitor) = 0;
virtual ~IVisitable() {}
};
// This abstract class provides the essential services that
// we want each SEA IR element to have.
// At the moment, these are:
// - an id and corresponding string representation.
// - a .dot graph language representation for .dot output.
//
// Note that SEA IR nodes could also be Regions, Projects
// which are not instructions.
class SeaNode: public IVisitable {
public:
explicit SeaNode():id_(GetNewId()), string_id_() {
string_id_ = art::StringPrintf("%d", id_);
}
// Adds CFG predecessors and successors to each block.
void AddSuccessor(Region* successor);
void AddPredecessor(Region* predecesor);
// Returns the id of the current block as string
const std::string& StringId() const {
return string_id_;
}
// Returns the id of this node as int. The id is supposed to be unique among
// all instances of all subclasses of this class.
int Id() const {
return id_;
}
virtual ~SeaNode() { }
protected:
static int GetNewId() {
return current_max_node_id_++;
}
const int id_;
std::string string_id_;
private:
static int current_max_node_id_;
// Creating new instances of sea node objects should not be done through copy or assignment
// operators because that would lead to duplication of their unique ids.
DISALLOW_COPY_AND_ASSIGN(SeaNode);
};
} // namespace sea_ir
#endif // ART_COMPILER_SEA_IR_IR_SEA_NODE_H_