Fast string construct stub (ia32 only for now).

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 99 matching lines @@
   V(KeyedStoreIC_ExternalUnsignedShortArray, KEYED_STORE_IC, MEGAMORPHIC) \
   V(KeyedStoreIC_ExternalIntArray,           KEYED_STORE_IC, MEGAMORPHIC) \
   V(KeyedStoreIC_ExternalUnsignedIntArray,   KEYED_STORE_IC, MEGAMORPHIC) \
   V(KeyedStoreIC_ExternalFloatArray,         KEYED_STORE_IC, MEGAMORPHIC) \
                                                                           \
   /* Uses KeyedLoadIC_Initialize; must be after in list. */               \
   V(FunctionCall,               BUILTIN, UNINITIALIZED)                   \
   V(FunctionApply,              BUILTIN, UNINITIALIZED)                   \
                                                                           \
   V(ArrayCode,                  BUILTIN, UNINITIALIZED)                   \
-  V(ArrayConstructCode,         BUILTIN, UNINITIALIZED)
+  V(ArrayConstructCode,         BUILTIN, UNINITIALIZED)                   \
+                                                                          \
+  V(StringConstructCode,        BUILTIN, UNINITIALIZED)
+
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 // Define list of builtins used by the debugger implemented in assembly.
 #define BUILTIN_LIST_DEBUG_A(V)                                \
   V(Return_DebugBreak,          BUILTIN, DEBUG_BREAK)          \
   V(ConstructCall_DebugBreak,   BUILTIN, DEBUG_BREAK)          \
   V(StubNoRegisters_DebugBreak, BUILTIN, DEBUG_BREAK)          \
   V(LoadIC_DebugBreak,          LOAD_IC, DEBUG_BREAK)          \
   V(KeyedLoadIC_DebugBreak,     KEYED_LOAD_IC, DEBUG_BREAK)    \
   V(StoreIC_DebugBreak,         STORE_IC, DEBUG_BREAK)         \
@@ skipping 120 matching lines @@
   static void Generate_JSEntryTrampoline(MacroAssembler* masm);
   static void Generate_JSConstructEntryTrampoline(MacroAssembler* masm);
   static void Generate_LazyCompile(MacroAssembler* masm);
   static void Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm);
 
   static void Generate_FunctionCall(MacroAssembler* masm);
   static void Generate_FunctionApply(MacroAssembler* masm);
 
   static void Generate_ArrayCode(MacroAssembler* masm);
   static void Generate_ArrayConstructCode(MacroAssembler* masm);
+
+  static void Generate_StringConstructCode(MacroAssembler* masm);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_BUILTINS_H_