Store optimized flow graph statistics on the function itself.

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 1270 matching lines @@
     raw_ptr()->usage_counter_ = value;
   }
 
   int16_t deoptimization_counter() const {
     return raw_ptr()->deoptimization_counter_;
   }
   void set_deoptimization_counter(int16_t value) const {
     raw_ptr()->deoptimization_counter_ = value;
   }
 
+  uint16_t optimized_instruction_count() const {

[srdjan, 2012/12/13 19:00:17]

I think it would be better to pass and return intptr_t-s instead of uint16_t-s.
That would also require a check in the setter that clamps the counter to max
uint16_t value and aserts that it is not less than 0.

[Vyacheslav Egorov (Google), 2012/12/13 19:14:11]

Done.

+    return raw_ptr()->optimized_instruction_count_;
+  }
+  void set_optimized_instruction_count(uint16_t value) const {
+    raw_ptr()->optimized_instruction_count_ = value;
+  }
+
+  uint16_t optimized_call_site_count() const {
+    return raw_ptr()->optimized_call_site_count_;
+  }
+  void set_optimized_call_site_count(uint16_t value) const {
+    raw_ptr()->optimized_call_site_count_ = value;
+  }
+
   bool is_optimizable() const;
   void set_is_optimizable(bool value) const;
 
   bool has_finally() const {
     return HasFinallyBit::decode(raw_ptr()->kind_tag_);
   }
   void set_has_finally(bool value) const;
 
   bool is_native() const { return NativeBit::decode(raw_ptr()->kind_tag_); }
   void set_is_native(bool value) const;
@@ skipping 4867 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_