Stack allocating block scoped variables.

src/objects.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3173 matching lines @@
 #endif
 
   // The layout of the static part of a ScopeInfo is as follows. Each entry is
   // numeric and occupies one array slot.
   // 1. A set of properties of the scope
   // 2. The number of parameters. This only applies to function scopes. For
   //    non-function scopes this is 0.
   // 3. The number of non-parameter variables allocated on the stack.
   // 4. The number of non-parameter and parameter variables allocated in the
   //    context.
+  // 5. The stack depth of the stack slots.
 #define FOR_EACH_NUMERIC_FIELD(V)          \
   V(Flags)                                 \
   V(ParameterCount)                        \
   V(StackLocalCount)                       \
-  V(ContextLocalCount)
+  V(ContextLocalCount)                     \
+  V(StackSlotsDepth)
 
 #define FIELD_ACCESSORS(name)                            \
   void Set##name(int value) {                            \
     set(k##name, Smi::FromInt(value));                   \
   }                                                      \
   int name() {                                           \
     if (length() > 0) {                                  \
       return Smi::cast(get(k##name))->value();           \
     } else {                                             \
       return 0;                                          \
@@ skipping 4750 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_