src/share/vm/opto/machnode.hpp

*** 208,218 ****
  
    // Support for short branches
    bool may_be_short_branch() const { return (flags() & Flag_may_be_short_branch) != 0; }
  
    // Avoid back to back some instructions on some CPUs.
!   bool avoid_back_to_back() const { return (flags() & Flag_avoid_back_to_back) != 0; }
  
    // instruction implemented with a call
    bool has_call() const { return (flags() & Flag_has_call) != 0; }
  
    // First index in _in[] corresponding to operand, or -1 if there is none
--- 208,225 ----
  
    // Support for short branches
    bool may_be_short_branch() const { return (flags() & Flag_may_be_short_branch) != 0; }
  
    // Avoid back to back some instructions on some CPUs.
!   enum AvoidBackToBackFlag { AVOID_NONE = 0,
!                              AVOID_BEFORE = Flag_avoid_back_to_back_before,
!                              AVOID_AFTER = Flag_avoid_back_to_back_after,
!                              AVOID_BEFORE_AND_AFTER = AVOID_BEFORE | AVOID_AFTER };
! 
!   bool avoid_back_to_back(AvoidBackToBackFlag flag_value) const {
!     return (flags() & flag_value) == flag_value;
!   }
  
    // instruction implemented with a call
    bool has_call() const { return (flags() & Flag_has_call) != 0; }
  
    // First index in _in[] corresponding to operand, or -1 if there is none