Serendipitously arrange the tags so that String.length() becomes a branch-fre...

src/builtins.h

 // Copyright 2006-2008 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 51 matching lines @@
   V(StoreIC_Miss,               BUILTIN, UNINITIALIZED)        \
   V(KeyedStoreIC_Miss,          BUILTIN, UNINITIALIZED)        \
                                                                \
   V(StoreIC_ExtendStorage,      BUILTIN, UNINITIALIZED)        \
   V(KeyedStoreIC_ExtendStorage, BUILTIN, UNINITIALIZED)        \
                                                                \
   V(LoadIC_Initialize,          LOAD_IC, UNINITIALIZED)        \
   V(LoadIC_PreMonomorphic,      LOAD_IC, PREMONOMORPHIC)       \
   V(LoadIC_Normal,              LOAD_IC, MONOMORPHIC)          \
   V(LoadIC_ArrayLength,         LOAD_IC, MONOMORPHIC)          \
-  V(LoadIC_ShortStringLength,   LOAD_IC, MONOMORPHIC)          \
-  V(LoadIC_MediumStringLength,  LOAD_IC, MONOMORPHIC)          \
-  V(LoadIC_LongStringLength,    LOAD_IC, MONOMORPHIC)          \
+  V(LoadIC_StringLength,        LOAD_IC, MONOMORPHIC)          \
   V(LoadIC_FunctionPrototype,   LOAD_IC, MONOMORPHIC)          \
   V(LoadIC_Megamorphic,         LOAD_IC, MEGAMORPHIC)          \
   V(LoadIC_DebugBreak,          LOAD_IC, DEBUG_BREAK)          \
                                                                \
   V(KeyedLoadIC_Initialize,     KEYED_LOAD_IC, UNINITIALIZED)  \
   V(KeyedLoadIC_PreMonomorphic, KEYED_LOAD_IC, PREMONOMORPHIC) \
   V(KeyedLoadIC_Generic,        KEYED_LOAD_IC, MEGAMORPHIC)    \
   V(KeyedLoadIC_DebugBreak,     KEYED_LOAD_IC, DEBUG_BREAK)    \
                                                                \
   V(StoreIC_Initialize,         STORE_IC, UNINITIALIZED)       \
@@ skipping 133 matching lines @@
   static void Generate_KeyedStoreIC_DebugBreak(MacroAssembler* masm);
   static void Generate_ConstructCall_DebugBreak(MacroAssembler* masm);
   static void Generate_Return_DebugBreak(MacroAssembler* masm);
   static void Generate_Return_DebugBreakEntry(MacroAssembler* masm);
   static void Generate_StubNoRegisters_DebugBreak(MacroAssembler* masm);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_BUILTINS_H_