Deoptimization can occur at Dart calls (includes native calls to C) but not at runtime calls. This …

runtime/vm/code_descriptors.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_CODE_DESCRIPTORS_H_
 #define VM_CODE_DESCRIPTORS_H_
 
 #include "vm/globals.h"
 #include "vm/growable_array.h"
 #include "vm/object.h"
@@ skipping 32 matching lines @@
   }
   intptr_t TryIndex(int index) const {
     return list_[index].try_index;
   }
 
   void AddDescriptor(PcDescriptors::Kind kind,
                      intptr_t pc_offset,
                      intptr_t deopt_id,
                      intptr_t token_index,
                      intptr_t try_index);
-  void AddDeoptInfo(intptr_t pc_offset,
-                    intptr_t deopt_id,
-                    intptr_t token_index,
-                    intptr_t deopt_array_index);
+  void AddDeoptIndex(intptr_t pc_offset,
+                     intptr_t deopt_id,
+                     intptr_t deopt_reason,
+                     intptr_t deopt_array_index);
 
   RawPcDescriptors* FinalizePcDescriptors(uword entry_point);
 
  private:
   GrowableArray<struct PcDesc> list_;
   DISALLOW_COPY_AND_ASSIGN(DescriptorList);
 };
 
 
 class StackmapTableBuilder : public ZoneAllocated {
@@ skipping 61 matching lines @@
   }
 
  private:
   GrowableArray<struct HandlerDesc> list_;
   DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerList);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_DESCRIPTORS_H_