Add a PLACEHOLDER code kind.

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 <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 4443 matching lines @@
   // Opaque data type for encapsulating code flags like kind, inline
   // cache state, and arguments count.
   typedef uint32_t Flags;
 
 #define NON_IC_KIND_LIST(V) \
   V(FUNCTION)               \
   V(OPTIMIZED_FUNCTION)     \
   V(STUB)                   \
   V(HANDLER)                \
   V(BUILTIN)                \
-  V(REGEXP)
+  V(REGEXP)                 \
+  V(PLACEHOLDER)
 
 #define IC_KIND_LIST(V) \
   V(LOAD_IC)            \
   V(KEYED_LOAD_IC)      \
   V(CALL_IC)            \
   V(STORE_IC)           \
   V(KEYED_STORE_IC)     \
   V(BINARY_OP_IC)       \
   V(COMPARE_IC)         \
   V(COMPARE_NIL_IC)     \
@@ skipping 5820 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_