Do not count invocations but usage of a function, i.e., increment a function's counter at IC calls …

runtime/vm/code_generator_arm.h

 // Copyright (c) 2011, 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_CODE_GENERATOR_ARM_H_
 #define VM_CODE_GENERATOR_ARM_H_
 
 #ifndef VM_CODE_GENERATOR_H_
 #error Do not include code_generator_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 28 matching lines @@
   void FinalizeVarDescriptors(const Code& code) { UNIMPLEMENTED(); }
 
   // Allocate and return an arguments descriptor.
   // Let 'num_names' be the length of 'optional_arguments_names'.
   // Treat the first 'num_arguments - num_names' arguments as positional and
   // treat the following 'num_names' arguments as named optional arguments.
   static const Array& ArgumentsDescriptor(
       int num_arguments,
       const Array& optional_arguments_names);
 
+  // Return true if the VM may optimize functions.
+  static bool CanOptimize();
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(CodeGenerator);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_GENERATOR_ARM_H_