Store optimized flow graph statistics on the function itself.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 0acf40a3caccfa70bc79fcc6d7221a98ed0c58cb..f5dbec44cd335e26ff48cbe7cfbc3f2d21bcd2bc 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -1288,6 +1288,29 @@ class Function : public Object {
     raw_ptr()->deoptimization_counter_ = value;
   }
 
+  static const intptr_t kMaxInstructionCount = (1 << 16) - 1;
+  intptr_t optimized_instruction_count() const {
+    return raw_ptr()->optimized_instruction_count_;
+  }
+  void set_optimized_instruction_count(intptr_t value) const {
+    ASSERT(value >= 0);
+    if (value > kMaxInstructionCount) {
+      value = kMaxInstructionCount;
+    }
+    raw_ptr()->optimized_instruction_count_ = static_cast<uint16_t>(value);
+  }
+
+  intptr_t optimized_call_site_count() const {
+    return raw_ptr()->optimized_call_site_count_;
+  }
+  void set_optimized_call_site_count(intptr_t value) const {
+    ASSERT(value >= 0);
+    if (value > kMaxInstructionCount) {
+      value = kMaxInstructionCount;
+    }
+    raw_ptr()->optimized_call_site_count_ = static_cast<uint16_t>(value);
+  }
+
   bool is_optimizable() const;
   void set_is_optimizable(bool value) const;