Optimize equality for case when all targets are Object.equals.

runtime/vm/object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2829 matching lines @@
       int index, intptr_t* class_id, Function* target) const;
 
   intptr_t GetReceiverClassIdAt(intptr_t index) const;
   RawFunction* GetTargetAt(intptr_t index) const;
   RawFunction* GetTargetForReceiverClassId(intptr_t class_id) const;
 
   // Returns this->raw() if num_args_tested == 1, otherwise returns a new
   // ICData object containing only unique arg0 checks.
   RawICData* AsUnaryClassChecks() const;
 
+  bool AllTargetsHaveSameOwner(intptr_t owner_cid) const;
+  bool AllReceiversAreNumbers() const;
+
   static RawICData* New(const Function& caller_function,
                         const String& target_name,
                         intptr_t deopt_id,
                         intptr_t num_args_tested);
 
  private:
   RawArray* ic_data() const {
     return raw_ptr()->ic_data_;
   }
 
@@ skipping 2592 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_