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

runtime/vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 483 matching lines @@
   RawCode* closure_allocation_stub_;  // Stub code for allocation of closures.
   RawFunction* implicit_closure_function_;  // Implicit closure function.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->implicit_closure_function_);
   }
 
   intptr_t token_index_;
   intptr_t end_token_index_;
   intptr_t num_fixed_parameters_;
   intptr_t num_optional_parameters_;
-  intptr_t invocation_counter_;
+  intptr_t usage_counter_;  // Incremented while function is running.
   intptr_t deoptimization_counter_;
   Kind kind_;
   bool is_static_;
   bool is_const_;
   bool is_optimizable_;
 };
 
 
 class RawField : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Field);
@@ skipping 583 matching lines @@
   RawString* target_name_;  // Name of target function.
   RawArray* ic_data_;  // Contains test classes and target function.
   intptr_t id_;  // Parser node id corresponding to this IC.
   intptr_t num_args_tested_;  // Number of arguments tested in IC.
 };
 
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_