src/compiler_llvm/compilation_unit.h

/*
 * Copyright (C) 2012 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_SRC_COMPILER_LLVM_COMPILATION_UNIT_H_
#define ART_SRC_COMPILER_LLVM_COMPILATION_UNIT_H_

#include "constants.h"
#include "logging.h"

#include <UniquePtr.h>
#include <string>

namespace llvm {
  class LLVMContext;
  class Module;
}

namespace art {
namespace compiler_llvm {

class IRBuilder;

class CompilationUnit {
 public:
  CompilationUnit(InstructionSet insn_set);

  ~CompilationUnit();

  InstructionSet GetInstructionSet() const {
    return insn_set_;
  }

  llvm::LLVMContext* GetLLVMContext() const {
    return context_.get();
  }

  llvm::Module* GetModule() const {
    return module_;
  }

  IRBuilder* GetIRBuilder() const {
    return irb_.get();
  }

  std::string const& GetElfFileName() const {
    CHECK(IsFinalized());
    return elf_filename_;
  }

  std::string const& GetBitcodeFileName() const {
    CHECK(IsFinalized());
    return bitcode_filename_;
  }

  void SetElfFileName(std::string const& filename) {
    elf_filename_ = filename;
  }

  void SetBitcodeFileName(std::string const& filename) {
    bitcode_filename_ = filename;
  }

  bool WriteBitcodeToFile();

  bool Materialize();

  bool IsFinalized() const {
    return (context_.get() == NULL);
  }

  void Finalize();

  bool IsMaterializeThresholdReached() const {
    return (mem_usage_ > 300000000u); // (threshold: 300 MB)
  }

  void AddMemUsageApproximation(size_t usage) {
    mem_usage_ += usage;
  }

 private:
  InstructionSet insn_set_;

  UniquePtr<llvm::LLVMContext> context_;
  UniquePtr<IRBuilder> irb_;
  llvm::Module* module_;

  std::string elf_filename_;
  std::string bitcode_filename_;

  size_t mem_usage_;
};

} // namespace compiler_llvm
} // namespace art

#endif // ART_SRC_COMPILER_LLVM_COMPILATION_UNIT_H_