// Determine compilation policy based on command line argument

void compilationPolicy_init() {

  {- -------------------------------------------
  (1) (フィールドの初期化)
      ---------------------------------------- -}

      CompilationPolicy::set_in_vm_startup(DelayCompilationDuringStartup);

  {- -------------------------------------------
  (1) CompilationPolicyChoice の値に応じた CompilationPolicy オブジェクトを生成し,
      フィールドに格納.
      ---------------------------------------- -}

      switch(CompilationPolicyChoice) {
      case 0:
        CompilationPolicy::set_policy(new SimpleCompPolicy());
        break;

      case 1:
    #ifdef COMPILER2
        CompilationPolicy::set_policy(new StackWalkCompPolicy());
    #else
        Unimplemented();
    #endif
        break;
      case 2:
    #ifdef TIERED
        CompilationPolicy::set_policy(new SimpleThresholdPolicy());
    #else
        Unimplemented();
    #endif
        break;
      case 3:
    #ifdef TIERED
        CompilationPolicy::set_policy(new AdvancedThresholdPolicy());
    #else
        Unimplemented();
    #endif
        break;
      default:
        fatal("CompilationPolicyChoice must be in the range: [0-3]");
      }

  {- -------------------------------------------
  (1) CompilationPolicy::initialize() (を各サブクラスがオーバーライドしたもの) を呼んで, 
      生成した CompilationPolicy オブジェクトを初期化
      ---------------------------------------- -}

      CompilationPolicy::policy()->initialize();
    }