*** old/src/share/vm/opto/machnode.hpp	Thu Apr 10 17:35:58 2014
--- new/src/share/vm/opto/machnode.hpp	Thu Apr 10 17:35:58 2014

*** 208,218 ****
--- 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.
    bool avoid_back_to_back() const { return (flags() & Flag_avoid_back_to_back) != 0; }
+   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