83   //
  84   // The non-Parm edges of the returned map will contain updated global state,
  85   // and one or two edges before jvms->sp() will carry any return values.
  86   // Other map edges may contain locals or monitors, and should not
  87   // be changed in meaning.
  88   //
  89   // If the call traps, the returned map must have a control edge of top.
  90   // If the call can throw, the returned map must report has_exceptions().
  91   //
  92   // If the result is NULL, it means that this CallGenerator was unable
  93   // to handle the given call, and another CallGenerator should be consulted.
  94   virtual JVMState* generate(JVMState* jvms) = 0;
  95 
  96   // How to generate a call site that is inlined:
  97   static CallGenerator* for_inline(ciMethod* m, float expected_uses = -1);
  98   // How to generate code for an on-stack replacement handler.
  99   static CallGenerator* for_osr(ciMethod* m, int osr_bci);
 100 
 101   // How to generate vanilla out-of-line call sites:
 102   static CallGenerator* for_direct_call(ciMethod* m, bool separate_io_projs = false);   // static, special

 103   static CallGenerator* for_virtual_call(ciMethod* m, int vtable_index);  // virtual, interface
 104 
 105   // How to generate a replace a direct call with an inline version
 106   static CallGenerator* for_late_inline(ciMethod* m, CallGenerator* inline_cg);
 107 
 108   // How to make a call but defer the decision whether to inline or not.
 109   static CallGenerator* for_warm_call(WarmCallInfo* ci,
 110                                       CallGenerator* if_cold,
 111                                       CallGenerator* if_hot);
 112 
 113   // How to make a call that optimistically assumes a receiver type:
 114   static CallGenerator* for_predicted_call(ciKlass* predicted_receiver,
 115                                            CallGenerator* if_missed,
 116                                            CallGenerator* if_hit,
 117                                            float hit_prob);
 118 
 119   // How to make a call that gives up and goes back to the interpreter:
 120   static CallGenerator* for_uncommon_trap(ciMethod* m,
 121                                           Deoptimization::DeoptReason reason,
 122                                           Deoptimization::DeoptAction action);

  83   //
  84   // The non-Parm edges of the returned map will contain updated global state,
  85   // and one or two edges before jvms->sp() will carry any return values.
  86   // Other map edges may contain locals or monitors, and should not
  87   // be changed in meaning.
  88   //
  89   // If the call traps, the returned map must have a control edge of top.
  90   // If the call can throw, the returned map must report has_exceptions().
  91   //
  92   // If the result is NULL, it means that this CallGenerator was unable
  93   // to handle the given call, and another CallGenerator should be consulted.
  94   virtual JVMState* generate(JVMState* jvms) = 0;
  95 
  96   // How to generate a call site that is inlined:
  97   static CallGenerator* for_inline(ciMethod* m, float expected_uses = -1);
  98   // How to generate code for an on-stack replacement handler.
  99   static CallGenerator* for_osr(ciMethod* m, int osr_bci);
 100 
 101   // How to generate vanilla out-of-line call sites:
 102   static CallGenerator* for_direct_call(ciMethod* m, bool separate_io_projs = false);   // static, special
 103   static CallGenerator* for_dynamic_call(ciMethod* m);   // invokedynamic
 104   static CallGenerator* for_virtual_call(ciMethod* m, int vtable_index);  // virtual, interface
 105 
 106   // How to generate a replace a direct call with an inline version
 107   static CallGenerator* for_late_inline(ciMethod* m, CallGenerator* inline_cg);
 108 
 109   // How to make a call but defer the decision whether to inline or not.
 110   static CallGenerator* for_warm_call(WarmCallInfo* ci,
 111                                       CallGenerator* if_cold,
 112                                       CallGenerator* if_hot);
 113 
 114   // How to make a call that optimistically assumes a receiver type:
 115   static CallGenerator* for_predicted_call(ciKlass* predicted_receiver,
 116                                            CallGenerator* if_missed,
 117                                            CallGenerator* if_hit,
 118                                            float hit_prob);
 119 
 120   // How to make a call that gives up and goes back to the interpreter:
 121   static CallGenerator* for_uncommon_trap(ciMethod* m,
 122                                           Deoptimization::DeoptReason reason,
 123                                           Deoptimization::DeoptAction action);