compiler/optimizing/builder.h

/*
 * 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_BUILDER_H_
#define ART_COMPILER_OPTIMIZING_BUILDER_H_

#include "utils/allocation.h"

namespace art {

class ArenaAllocator;
class Instruction;
class HBasicBlock;
class HGraph;

class HGraphBuilder : public ValueObject {
 public:
  explicit HGraphBuilder(ArenaAllocator* arena)
      : arena_(arena),
        entry_block_(nullptr),
        exit_block_(nullptr),
        current_block_(nullptr),
        graph_(nullptr) { }

  HGraph* BuildGraph(const uint16_t* start, const uint16_t* end);

 private:
  // Analyzes the dex instruction and adds HInstruction to the graph
  // to execute that instruction. Returns whether the instruction can
  // be handled.
  bool AnalyzeDexInstruction(const Instruction& instruction);

  ArenaAllocator* const arena_;
  HBasicBlock* entry_block_;
  HBasicBlock* exit_block_;
  HBasicBlock* current_block_;
  HGraph* graph_;

  DISALLOW_COPY_AND_ASSIGN(HGraphBuilder);
};

}  // namespace art

#endif  // ART_COMPILER_OPTIMIZING_BUILDER_H_