3151   // for example, in some objArray manipulations, such as a[i]=a[j].)
3152   if (tk->singleton()) {
3153     ciKlass* klass = NULL;
3154     if (is_value) {
3155       klass = _gvn.type(obj)->is_valuetype()->value_klass();
3156     } else {
3157       const TypeOopPtr* objtp = _gvn.type(obj)->isa_oopptr();
3158       if (objtp != NULL) {
3159         klass = objtp->klass();
3160       }
3161     }
3162     if (klass != NULL) {
3163       switch (C->static_subtype_check(tk->klass(), klass)) {
3164       case Compile::SSC_always_true:
3165         // If we know the type check always succeed then we don't use
3166         // the profiling data at this bytecode. Don't lose it, feed it
3167         // to the type system as a speculative type.
3168         if (!is_value) {
3169           obj = record_profiled_receiver_for_speculation(obj);
3170           if (toop->is_valuetypeptr()) {
3171             obj = ValueTypeNode::make_from_oop(this, obj, toop->value_klass(), /* buffer_check */ false, /* null2default */ false);
3172           }
3173         }
3174         return obj;
3175       case Compile::SSC_always_false:
3176         // It needs a null check because a null will *pass* the cast check.
3177         // A non-null value will always produce an exception.
3178         if (is_value) {
3179           builtin_throw(Deoptimization::Reason_class_check, makecon(TypeKlassPtr::make(klass)));
3180           return top();
3181         } else {
3182           return null_assert(obj);
3183         }
3184       }
3185     }
3186   }
3187 
3188   ciProfileData* data = NULL;
3189   bool safe_for_replace = false;
3190   if (failure_control == NULL) {        // use MDO in regular case only
3191     assert(java_bc() == Bytecodes::_aastore ||

3289   // A merge of NULL or Casted-NotNull obj
3290   Node* res = _gvn.transform(phi);
3291 
3292   // Note I do NOT always 'replace_in_map(obj,result)' here.
3293   //  if( tk->klass()->can_be_primary_super()  )
3294     // This means that if I successfully store an Object into an array-of-String
3295     // I 'forget' that the Object is really now known to be a String.  I have to
3296     // do this because we don't have true union types for interfaces - if I store
3297     // a Baz into an array-of-Interface and then tell the optimizer it's an
3298     // Interface, I forget that it's also a Baz and cannot do Baz-like field
3299     // references to it.  FIX THIS WHEN UNION TYPES APPEAR!
3300   //  replace_in_map( obj, res );
3301 
3302   // Return final merged results
3303   set_control( _gvn.transform(region) );
3304   record_for_igvn(region);
3305 
3306   if (!is_value) {
3307     res = record_profiled_receiver_for_speculation(res);
3308     if (toop->is_valuetypeptr()) {
3309       res = ValueTypeNode::make_from_oop(this, res, toop->value_klass(), /* buffer_check */ false, /* null2default */ false);
3310     }
3311   }
3312   return res;
3313 }
3314 
3315 Node* GraphKit::is_always_locked(Node* obj) {
3316   Node* mark_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes());
3317   Node* mark = make_load(NULL, mark_addr, TypeX_X, TypeX_X->basic_type(), MemNode::unordered);
3318   Node* value_mask = _gvn.MakeConX(markOopDesc::always_locked_pattern);
3319   return _gvn.transform(new AndXNode(mark, value_mask));
3320 }
3321 
3322 Node* GraphKit::gen_value_type_test(Node* kls) {
3323   Node* flags_addr = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset()));
3324   Node* flags = make_load(NULL, flags_addr, TypeInt::INT, T_INT, MemNode::unordered);
3325   Node* is_value = _gvn.transform(new AndINode(flags, intcon(JVM_ACC_VALUE)));
3326   Node* cmp = _gvn.transform(new CmpINode(is_value, intcon(0)));
3327   return cmp;
3328 }
3329 

3151   // for example, in some objArray manipulations, such as a[i]=a[j].)
3152   if (tk->singleton()) {
3153     ciKlass* klass = NULL;
3154     if (is_value) {
3155       klass = _gvn.type(obj)->is_valuetype()->value_klass();
3156     } else {
3157       const TypeOopPtr* objtp = _gvn.type(obj)->isa_oopptr();
3158       if (objtp != NULL) {
3159         klass = objtp->klass();
3160       }
3161     }
3162     if (klass != NULL) {
3163       switch (C->static_subtype_check(tk->klass(), klass)) {
3164       case Compile::SSC_always_true:
3165         // If we know the type check always succeed then we don't use
3166         // the profiling data at this bytecode. Don't lose it, feed it
3167         // to the type system as a speculative type.
3168         if (!is_value) {
3169           obj = record_profiled_receiver_for_speculation(obj);
3170           if (toop->is_valuetypeptr()) {
3171             obj = ValueTypeNode::make_from_oop(this, obj, toop->value_klass(), /* null2default */ false);
3172           }
3173         }
3174         return obj;
3175       case Compile::SSC_always_false:
3176         // It needs a null check because a null will *pass* the cast check.
3177         // A non-null value will always produce an exception.
3178         if (is_value) {
3179           builtin_throw(Deoptimization::Reason_class_check, makecon(TypeKlassPtr::make(klass)));
3180           return top();
3181         } else {
3182           return null_assert(obj);
3183         }
3184       }
3185     }
3186   }
3187 
3188   ciProfileData* data = NULL;
3189   bool safe_for_replace = false;
3190   if (failure_control == NULL) {        // use MDO in regular case only
3191     assert(java_bc() == Bytecodes::_aastore ||

3289   // A merge of NULL or Casted-NotNull obj
3290   Node* res = _gvn.transform(phi);
3291 
3292   // Note I do NOT always 'replace_in_map(obj,result)' here.
3293   //  if( tk->klass()->can_be_primary_super()  )
3294     // This means that if I successfully store an Object into an array-of-String
3295     // I 'forget' that the Object is really now known to be a String.  I have to
3296     // do this because we don't have true union types for interfaces - if I store
3297     // a Baz into an array-of-Interface and then tell the optimizer it's an
3298     // Interface, I forget that it's also a Baz and cannot do Baz-like field
3299     // references to it.  FIX THIS WHEN UNION TYPES APPEAR!
3300   //  replace_in_map( obj, res );
3301 
3302   // Return final merged results
3303   set_control( _gvn.transform(region) );
3304   record_for_igvn(region);
3305 
3306   if (!is_value) {
3307     res = record_profiled_receiver_for_speculation(res);
3308     if (toop->is_valuetypeptr()) {
3309       res = ValueTypeNode::make_from_oop(this, res, toop->value_klass(), /* null2default */ false);
3310     }
3311   }
3312   return res;
3313 }
3314 
3315 Node* GraphKit::is_always_locked(Node* obj) {
3316   Node* mark_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes());
3317   Node* mark = make_load(NULL, mark_addr, TypeX_X, TypeX_X->basic_type(), MemNode::unordered);
3318   Node* value_mask = _gvn.MakeConX(markOopDesc::always_locked_pattern);
3319   return _gvn.transform(new AndXNode(mark, value_mask));
3320 }
3321 
3322 Node* GraphKit::gen_value_type_test(Node* kls) {
3323   Node* flags_addr = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset()));
3324   Node* flags = make_load(NULL, flags_addr, TypeInt::INT, T_INT, MemNode::unordered);
3325   Node* is_value = _gvn.transform(new AndINode(flags, intcon(JVM_ACC_VALUE)));
3326   Node* cmp = _gvn.transform(new CmpINode(is_value, intcon(0)));
3327   return cmp;
3328 }
3329