Perform string add in generated code on IA-32 platforms...

src/runtime.js

 // 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 128 matching lines @@
 
 /* -----------------------------------
    - - -   A r i t h m e t i c   - - -
    -----------------------------------
 */
 
 // ECMA-262, section 11.6.1, page 50.
 function ADD(x) {
   // Fast case: Check for number operands and do the addition.
   if (IS_NUMBER(this) && IS_NUMBER(x)) return %NumberAdd(this, x);
-  if (IS_STRING(this) && IS_STRING(x)) return %StringAdd(this, x);
+  if (IS_STRING(this) && IS_STRING(x)) return %_StringAdd(this, x);
 
   // Default implementation.
   var a = %ToPrimitive(this, NO_HINT);
   var b = %ToPrimitive(x, NO_HINT);
 
   if (IS_STRING(a)) {
-    return %StringAdd(a, %ToString(b));
+    return %_StringAdd(a, %ToString(b));
   } else if (IS_STRING(b)) {
-    return %StringAdd(%ToString(a), b);
+    return %_StringAdd(%ToString(a), b);
   } else {
     return %NumberAdd(%ToNumber(a), %ToNumber(b));
   }
 }
 
 
 // Left operand (this) is already a string.
 function STRING_ADD_LEFT(y) {
   if (!IS_STRING(y)) {
     if (IS_STRING_WRAPPER(y)) {
       y = %_ValueOf(y);
     } else {
       y = IS_NUMBER(y)
           ? %NumberToString(y)
           : %ToString(%ToPrimitive(y, NO_HINT));
     }
   }
-  return %StringAdd(this, y);
+  return %_StringAdd(this, y);
 }
 
 
 // Right operand (y) is already a string.
 function STRING_ADD_RIGHT(y) {
   var x = this;
   if (!IS_STRING(x)) {
     if (IS_STRING_WRAPPER(x)) {
       x = %_ValueOf(x);
     } else {
       x = IS_NUMBER(x)
           ? %NumberToString(x)
           : %ToString(%ToPrimitive(x, NO_HINT));
     }
   }
-  return %StringAdd(x, y);
+  return %_StringAdd(x, y);
 }
 
 
 // ECMA-262, section 11.6.2, page 50.
 function SUB(y) {
   var x = IS_NUMBER(this) ? this : %ToNumber(this);
   if (!IS_NUMBER(y)) y = %ToNumber(y);
   return %NumberSub(x, y);
 }
 
@@ skipping 394 matching lines @@
   throw %MakeTypeError('cannot_convert_to_primitive', []);
 }
 
 
 // NOTE: Setting the prototype for Array must take place as early as
 // possible due to code generation for array literals.  When
 // generating code for a array literal a boilerplate array is created
 // that is cloned when running the code.  It is essiential that the
 // boilerplate gets the right prototype.
 %FunctionSetPrototype($Array, new $Array(0));