3010   const TypeOopPtr* obj_type = _gvn.type(obj)->is_oopptr();

  3010   if (tk->klass_is_exact()) {

  3011   // We may not have profiling here or it may not help us. If we have

  3011     // The following optimization tries to statically cast the speculative type of the object

  3012   // a speculative type use it to perform an exact cast.

  3012     // (for example obtained during profiling) to the type of the superklass and then do a

  3013   ciKlass* spec_obj_type = obj_type->speculative_type();

  3013     // dynamic check that the type of the object is what we expect. To work correctly

  3014   if (spec_obj_type != NULL ||

  3014     // for checkcast and aastore the type of superklass should be exact.

  3015       (data != NULL &&

  3015     const TypeOopPtr* obj_type = _gvn.type(obj)->is_oopptr();

  3016        // Counter has never been decremented (due to cast failure).

  3016     // We may not have profiling here or it may not help us. If we have

  3017        // ...This is a reasonable thing to expect.  It is true of

  3017     // a speculative type use it to perform an exact cast.

  3018        // all casts inserted by javac to implement generic types.

  3018     ciKlass* spec_obj_type = obj_type->speculative_type();

  3019        data->as_CounterData()->count() >= 0)) {

  3019     if (spec_obj_type != NULL ||

  3020     cast_obj = maybe_cast_profiled_receiver(not_null_obj, tk->klass(), spec_obj_type, safe_for_replace);

  3020         (data != NULL &&

  3021     if (cast_obj != NULL) {

  3021          // Counter has never been decremented (due to cast failure).

  3022       if (failure_control != NULL) // failure is now impossible

  3022          // ...This is a reasonable thing to expect.  It is true of

  3023         (*failure_control) = top();

  3023          // all casts inserted by javac to implement generic types.

  3024       // adjust the type of the phi to the exact klass:

  3024          data->as_CounterData()->count() >= 0)) {

  3025       phi->raise_bottom_type(_gvn.type(cast_obj)->meet_speculative(TypePtr::NULL_PTR));

  3025       cast_obj = maybe_cast_profiled_receiver(not_null_obj, tk->klass(), spec_obj_type, safe_for_replace);

  3026       if (cast_obj != NULL) {

  3027         if (failure_control != NULL) // failure is now impossible

  3028           (*failure_control) = top();

  3029         // adjust the type of the phi to the exact klass:

  3030         phi->raise_bottom_type(_gvn.type(cast_obj)->meet_speculative(TypePtr::NULL_PTR));

  3031       }