Use a dictionary-mode code cache on the map rather than a dual system.

src/globals.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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 533 matching lines @@
 
 // State for inline cache call sites. Aliased as IC::State.
 enum InlineCacheState {
   // Has never been executed.
   UNINITIALIZED,
   // Has been executed but monomorhic state has been delayed.
   PREMONOMORPHIC,
   // Has been executed and only one receiver type has been seen.
   MONOMORPHIC,
   // Check failed due to prototype (or map deprecation).
-  PROTOTYPE_FAILURE,
+  RECOMPUTE_HANDLER,
   // Multiple receiver types have been seen.
   POLYMORPHIC,
   // Many receiver types have been seen.
   MEGAMORPHIC,
   // A generic handler is installed and no extra typefeedback is recorded.
   GENERIC,
   // Special state for debug break or step in prepare stubs.
   DEBUG_STUB
 };
 
-
 enum CacheHolderFlag {
   kCacheOnPrototype,
   kCacheOnPrototypeReceiverIsDictionary,
   kCacheOnPrototypeReceiverIsPrimitive,
   kCacheOnReceiver
 };
 
 
 // The Store Buffer (GC).
 typedef enum {
@@ skipping 464 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_