When marking dependent code for deoptimization print the group that is being deoptimized.

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
 #include "src/builtins.h"
@@ skipping 5988 matching lines @@
   inline void set_object_at(int i, Object* object);
   inline Object** slot_at(int i);
   inline Object* object_at(int i);
   inline void clear_at(int i);
   inline void copy(int from, int to);
   DECLARE_CAST(DependentCode)
 
   static DependentCode* ForObject(Handle<HeapObject> object,
                                   DependencyGroup group);
 
+  static const char* DependencyGroupName(DependencyGroup group);
+  static void SetMarkedForDeoptimization(Code* code, DependencyGroup group);
+
  private:
   // Make a room at the end of the given group by moving out the first
   // code objects of the subsequent groups.
   inline void ExtendGroup(DependencyGroup group);
   static const int kCodesStartIndex = kGroupCount;
 };
 
 
 // All heap objects have a Map that describes their structure.
 //  A Map contains information about:
@@ skipping 5192 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_