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

src/ic.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 193 matching lines @@
 
   // Code generator routines.
   static void GenerateInitialize(MacroAssembler* masm);
   static void GeneratePreMonomorphic(MacroAssembler* masm);
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateMegamorphic(MacroAssembler* masm);
   static void GenerateNormal(MacroAssembler* masm);
 
   // Specialized code generator routines.
   static void GenerateArrayLength(MacroAssembler* masm);
-  static void GenerateShortStringLength(MacroAssembler* masm);
-  static void GenerateMediumStringLength(MacroAssembler* masm);
-  static void GenerateLongStringLength(MacroAssembler* masm);
+  static void GenerateStringLength(MacroAssembler* masm);
   static void GenerateFunctionPrototype(MacroAssembler* masm);
 
  private:
   static void Generate(MacroAssembler* masm, const ExternalReference& f);
 
   // Update the inline cache and the global stub cache based on the
   // lookup result.
   void UpdateCaches(LookupResult* lookup,
                     State state,
                     Handle<Object> object,
@@ skipping 130 matching lines @@
   }
 
   static void Clear(Address address, Code* target);
   friend class IC;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_