2710   Node* recv_klass = load_object_klass(receiver);
2711   Node* want_klass = makecon(tklass);
2712   Node* cmp = _gvn.transform( new CmpPNode(recv_klass, want_klass) );
2713   Node* bol = _gvn.transform( new BoolNode(cmp, BoolTest::eq) );
2714   IfNode* iff = create_and_xform_if(control(), bol, prob, COUNT_UNKNOWN);
2715   set_control( _gvn.transform( new IfTrueNode (iff) ));
2716   Node* fail = _gvn.transform( new IfFalseNode(iff) );
2717 
2718   const TypeOopPtr* recv_xtype = tklass->as_instance_type();
2719   assert(recv_xtype->klass_is_exact(), "");
2720 
2721   // Subsume downstream occurrences of receiver with a cast to
2722   // recv_xtype, since now we know what the type will be.
2723   Node* cast = new CheckCastPPNode(control(), receiver, recv_xtype);
2724   (*casted_receiver) = _gvn.transform(cast);
2725   // (User must make the replace_in_map call.)
2726 
2727   return fail;
2728 }
2729 












2730 


2731 //------------------------------seems_never_null-------------------------------
2732 // Use null_seen information if it is available from the profile.
2733 // If we see an unexpected null at a type check we record it and force a
2734 // recompile; the offending check will be recompiled to handle NULLs.
2735 // If we see several offending BCIs, then all checks in the
2736 // method will be recompiled.
2737 bool GraphKit::seems_never_null(Node* obj, ciProfileData* data, bool& speculating) {
2738   speculating = !_gvn.type(obj)->speculative_maybe_null();
2739   Deoptimization::DeoptReason reason = Deoptimization::reason_null_check(speculating);
2740   if (UncommonNullCast               // Cutout for this technique
2741       && obj != null()               // And not the -Xcomp stupid case?
2742       && !too_many_traps(reason)
2743       ) {
2744     if (speculating) {
2745       return true;
2746     }
2747     if (data == NULL)
2748       // Edge case:  no mature data.  Be optimistic here.
2749       return true;
2750     // If the profile has not seen a null, assume it won't happen.

2710   Node* recv_klass = load_object_klass(receiver);
2711   Node* want_klass = makecon(tklass);
2712   Node* cmp = _gvn.transform( new CmpPNode(recv_klass, want_klass) );
2713   Node* bol = _gvn.transform( new BoolNode(cmp, BoolTest::eq) );
2714   IfNode* iff = create_and_xform_if(control(), bol, prob, COUNT_UNKNOWN);
2715   set_control( _gvn.transform( new IfTrueNode (iff) ));
2716   Node* fail = _gvn.transform( new IfFalseNode(iff) );
2717 
2718   const TypeOopPtr* recv_xtype = tklass->as_instance_type();
2719   assert(recv_xtype->klass_is_exact(), "");
2720 
2721   // Subsume downstream occurrences of receiver with a cast to
2722   // recv_xtype, since now we know what the type will be.
2723   Node* cast = new CheckCastPPNode(control(), receiver, recv_xtype);
2724   (*casted_receiver) = _gvn.transform(cast);
2725   // (User must make the replace_in_map call.)
2726 
2727   return fail;
2728 }
2729 
2730 Node* GraphKit::subtype_check_receiver(Node* receiver, ciKlass* klass,
2731                                        Node** casted_receiver) {
2732   const TypeKlassPtr* tklass = TypeKlassPtr::make(klass);
2733   Node* recv_klass = load_object_klass(receiver);
2734   Node* want_klass = makecon(tklass);
2735 
2736   Node* slow_ctl = gen_subtype_check(recv_klass, want_klass);
2737 
2738   // Cast receiver after successful check
2739   const TypeOopPtr* recv_type = tklass->cast_to_exactness(false)->is_klassptr()->as_instance_type();
2740   Node* cast = new CheckCastPPNode(control(), receiver, recv_type);
2741   (*casted_receiver) = _gvn.transform(cast);
2742 
2743   return slow_ctl;
2744 }
2745 //------------------------------seems_never_null-------------------------------
2746 // Use null_seen information if it is available from the profile.
2747 // If we see an unexpected null at a type check we record it and force a
2748 // recompile; the offending check will be recompiled to handle NULLs.
2749 // If we see several offending BCIs, then all checks in the
2750 // method will be recompiled.
2751 bool GraphKit::seems_never_null(Node* obj, ciProfileData* data, bool& speculating) {
2752   speculating = !_gvn.type(obj)->speculative_maybe_null();
2753   Deoptimization::DeoptReason reason = Deoptimization::reason_null_check(speculating);
2754   if (UncommonNullCast               // Cutout for this technique
2755       && obj != null()               // And not the -Xcomp stupid case?
2756       && !too_many_traps(reason)
2757       ) {
2758     if (speculating) {
2759       return true;
2760     }
2761     if (data == NULL)
2762       // Edge case:  no mature data.  Be optimistic here.
2763       return true;
2764     // If the profile has not seen a null, assume it won't happen.