In optimized code use IC calls for instance calls that have no IC data instead of deoptimizing. The…

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 2788 matching lines @@
   intptr_t deopt_id() const {
     return raw_ptr()->deopt_id_;
   }
 
   intptr_t deopt_reason() const {
     return raw_ptr()->deopt_reason_;
   }
 
   void set_deopt_reason(intptr_t reason) const;
 
+  bool is_closure_call() const {
+    return raw_ptr()->is_closure_call_ == 1;
+  }
+
+  void set_is_closure_call(bool value) const;
+
   intptr_t NumberOfChecks() const;
 
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawICData));
   }
 
   static intptr_t target_name_offset() {
     return OFFSET_OF(RawICData, target_name_);
   }
 
   static intptr_t num_args_tested_offset() {
     return OFFSET_OF(RawICData, num_args_tested_);
   }
 
   static intptr_t ic_data_offset() {
     return OFFSET_OF(RawICData, ic_data_);
   }
 
   static intptr_t function_offset() {
     return OFFSET_OF(RawICData, function_);
   }
 
+  static intptr_t is_closure_call_offset() {
+    return OFFSET_OF(RawICData, is_closure_call_);
+  }
+
   // Adding checks.
 
   // Adds one more class test to ICData. Length of 'classes' must be equal to
   // the number of arguments tested. Use only for num_args_tested > 1.
   void AddCheck(const GrowableArray<intptr_t>& class_ids,
                 const Function& target) const;
   // Adds sorted so that Smi is the first class-id. Use only for
   // num_args_tested == 1.
   void AddReceiverCheck(intptr_t receiver_class_id,
                         const Function& target) const;
@@ skipping 3044 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_