49   };
  50 
  51  private:
  52   Type _type;
  53 
  54  public:
  55   AbstractCompiler(Type type) : _type(type), _compiler_state(uninitialized), _num_compiler_threads(0) {}
  56 
  57   // This function determines the compiler thread that will perform the
  58   // shutdown of the corresponding compiler runtime.
  59   bool should_perform_shutdown();
  60 
  61   // Name of this compiler
  62   virtual const char* name() = 0;
  63 
  64   // Missing feature tests
  65   virtual bool supports_native()                 { return true; }
  66   virtual bool supports_osr   ()                 { return true; }
  67   virtual bool can_compile_method(methodHandle method)  { return true; }
  68 






































  69   // Compiler type queries.
  70   bool is_c1()                                   { return _type == c1; }
  71   bool is_c2()                                   { return _type == c2; }
  72   bool is_shark()                                { return _type == shark; }
  73 
  74   // Customization
  75   virtual void initialize () = 0;
  76 
  77   void set_num_compiler_threads(int num) { _num_compiler_threads = num;  }
  78   int num_compiler_threads()             { return _num_compiler_threads; }
  79 
  80   // Get/set state of compiler objects
  81   bool is_initialized()           { return _compiler_state == initialized; }
  82   bool is_failed     ()           { return _compiler_state == failed;}
  83   void set_state     (int state);
  84   void set_shut_down ()           { set_state(shut_down); }
  85   // Compilation entry point for methods
  86   virtual void compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
  87     ShouldNotReachHere();
  88   }

  49   };
  50 
  51  private:
  52   Type _type;
  53 
  54  public:
  55   AbstractCompiler(Type type) : _type(type), _compiler_state(uninitialized), _num_compiler_threads(0) {}
  56 
  57   // This function determines the compiler thread that will perform the
  58   // shutdown of the corresponding compiler runtime.
  59   bool should_perform_shutdown();
  60 
  61   // Name of this compiler
  62   virtual const char* name() = 0;
  63 
  64   // Missing feature tests
  65   virtual bool supports_native()                 { return true; }
  66   virtual bool supports_osr   ()                 { return true; }
  67   virtual bool can_compile_method(methodHandle method)  { return true; }
  68 
  69   // Determine if the current compiler provides an intrinsic
  70   // for method 'method'. An intrinsic is available if:
  71   //  - the intrinsic is enabled (by using the appropriate command-line flag) and
  72   //  - the platform on which the VM is running provides the instructions necessary
  73   //    for the compiler to generate the intrinsic code.
  74   //
  75   // An intrinsic can also be disabled using the DisableIntrinsic command-line
  76   // flag. There are three ways to disable an intrinsic using the DisableIntrinsic
  77   // flag:
  78   //
  79   // (1) -XX:DisableIntrinsic=_hashCode,_getClass
  80   //     Disables intrinsification of _hashCode and _getClass globally
  81   //     (i.e., the intrinsified version the methods will not be used at all).
  82   // (2) -XX:CompileCommand=option,aClass::aMethod,DisableIntrinsic,_hashCode
  83   //     Disables intrinsification of _hashCode when it is called from
  84   //     aClass::aMethod (but not for any other call site of _hashCode)
  85   // (3) -XX:CompileCommand=option,java.lang.ref.Reference::get,DisableIntrinsic,_Reference_get
  86   //     Some methods are not compiled by C2. Instead, the C2 compiler
  87   //     returns directly the intrinsified version of these methods.
  88   //     The command above forces C2 to compile _Reference_get, but
  89   //     allows using the intrinsified version of _Reference_get at all
  90   //     other call sites.
  91   //
  92   // From the above modes, (1) disable intrinsics globally, (2) and (3)
  93   // disable intrinsics on a per-method basis. In cases (2) and (3) the
  94   // compilation context is aClass::aMethod and java.lang.ref.Reference::get,
  95   // respectively.
  96   virtual bool is_intrinsic_available_for(methodHandle method, methodHandle compilation_context) {
  97     return false;
  98   }
  99 
 100   // Use the version of 'is_intrinsic_available_for' from below if usage of
 101   // per-method DisableIntrinsic flag is not expected (or not relevant). The
 102   // method below ignores all per-method usages of the DisableIntrinsic flag.
 103   virtual bool is_intrinsic_available_for(methodHandle method) {
 104     return false;
 105   }
 106 
 107   // Compiler type queries.
 108   bool is_c1()                                   { return _type == c1; }
 109   bool is_c2()                                   { return _type == c2; }
 110   bool is_shark()                                { return _type == shark; }
 111 
 112   // Customization
 113   virtual void initialize () = 0;
 114 
 115   void set_num_compiler_threads(int num) { _num_compiler_threads = num;  }
 116   int num_compiler_threads()             { return _num_compiler_threads; }
 117 
 118   // Get/set state of compiler objects
 119   bool is_initialized()           { return _compiler_state == initialized; }
 120   bool is_failed     ()           { return _compiler_state == failed;}
 121   void set_state     (int state);
 122   void set_shut_down ()           { set_state(shut_down); }
 123   // Compilation entry point for methods
 124   virtual void compile_method(ciEnv* env, ciMethod* target, int entry_bci) {
 125     ShouldNotReachHere();
 126   }