Some string optimizations:

src/mips/codegen-mips.h

 // Copyright 2010 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 192 matching lines @@
   Handle<Code> ComputeCallInitialize(int argc, InLoopFlag in_loop);
 
   // Declare global variables and functions in the given array of
   // name/value pairs.
   void DeclareGlobals(Handle<FixedArray> pairs);
 
   // Support for type checks.
   void GenerateIsSmi(ZoneList<Expression*>* args);
   void GenerateIsNonNegativeSmi(ZoneList<Expression*>* args);
   void GenerateIsArray(ZoneList<Expression*>* args);
+  void GenerateIsRegExp(ZoneList<Expression*>* args);
 
   // Support for construct call checks.
   void GenerateIsConstructCall(ZoneList<Expression*>* args);
 
   // Support for arguments.length and arguments[?].
   void GenerateArgumentsLength(ZoneList<Expression*>* args);
   void GenerateArgumentsAccess(ZoneList<Expression*>* args);
 
   // Support for accessing the class and value fields of an object.
   void GenerateClassOf(ZoneList<Expression*>* args);
@@ skipping 11 matching lines @@
   // Fast support for Math.random().
   void GenerateRandomPositiveSmi(ZoneList<Expression*>* args);
 
   void GenerateIsObject(ZoneList<Expression*>* args);
   void GenerateIsFunction(ZoneList<Expression*>* args);
   void GenerateIsUndetectableObject(ZoneList<Expression*>* args);
   void GenerateStringAdd(ZoneList<Expression*>* args);
   void GenerateSubString(ZoneList<Expression*>* args);
   void GenerateStringCompare(ZoneList<Expression*>* args);
   void GenerateRegExpExec(ZoneList<Expression*>* args);
+  void GenerateNumberToString(ZoneList<Expression*>* args);
+
 
   // Fast support for Math.sin and Math.cos.
   inline void GenerateMathSin(ZoneList<Expression*>* args);
   inline void GenerateMathCos(ZoneList<Expression*>* args);
 
   // Simple condition analysis.
   enum ConditionAnalysis {
     ALWAYS_TRUE,
     ALWAYS_FALSE,
     DONT_KNOW
@@ skipping 47 matching lines @@
   friend class FastCodeGenerator;
   friend class FullCodeGenSyntaxChecker;
 
   DISALLOW_COPY_AND_ASSIGN(CodeGenerator);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_CODEGEN_MIPS_H_
-