src/share/vm/opto/node.hpp

*** 671,681 ****
      Flag_is_dead_loop_safe           = Flag_is_cisc_alternate << 1,
      Flag_may_be_short_branch         = Flag_is_dead_loop_safe << 1,
      Flag_avoid_back_to_back_before   = Flag_may_be_short_branch << 1,
      Flag_avoid_back_to_back_after    = Flag_avoid_back_to_back_before << 1,
      Flag_has_call                    = Flag_avoid_back_to_back_after << 1,
!     Flag_is_expensive                = Flag_has_call << 1,
      _max_flags = (Flag_is_expensive << 1) - 1 // allow flags combination
    };
  
  private:
    jushort _class_id;
--- 671,682 ----
      Flag_is_dead_loop_safe           = Flag_is_cisc_alternate << 1,
      Flag_may_be_short_branch         = Flag_is_dead_loop_safe << 1,
      Flag_avoid_back_to_back_before   = Flag_may_be_short_branch << 1,
      Flag_avoid_back_to_back_after    = Flag_avoid_back_to_back_before << 1,
      Flag_has_call                    = Flag_avoid_back_to_back_after << 1,
!     Flag_is_reduction                = Flag_has_call << 1,
!     Flag_is_expensive                = Flag_is_reduction << 1,
      _max_flags = (Flag_is_expensive << 1) - 1 // allow flags combination
    };
  
  private:
    jushort _class_id;
*** 699,708 ****
--- 700,713 ----
  public:
    const jushort class_id() const { return _class_id; }
  
    const jushort flags() const { return _flags; }
  
+   void add_flag(jushort fl) { init_flags(fl); }
+ 
+   void remove_flag(jushort fl) { clear_flag(fl); }
+ 
    // Return a dense integer opcode number
    virtual int Opcode() const;
  
    // Virtual inherited Node size
    virtual uint size_of() const;
*** 850,859 ****
--- 855,868 ----
    // The node is a "macro" node which needs to be expanded before matching
    bool is_macro() const { return (_flags & Flag_is_macro) != 0; }
    // The node is expensive: the best control is set during loop opts
    bool is_expensive() const { return (_flags & Flag_is_expensive) != 0 && in(0) != NULL; }
  
+   // An arithmetic node which accumulates a data in a loop.
+   // It must have the loop's phi as input and provide a def to the phi.
+   bool is_reduction() const { return (_flags & Flag_is_reduction) != 0; }
+ 
  //----------------- Optimization
  
    // Get the worst-case Type output for this Node.
    virtual const class Type *bottom_type() const;