[stubs] Unify (and optimize) implementation of ToObject.

src/runtime.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This files contains runtime support implemented in JavaScript.
 
 // CAUTION: Some of the functions specified in this file are called
 // directly from compiled code. These are the functions with names in
 // ALL CAPS. The compiled code passes the first argument in 'this'.
 
@@ skipping 40 matching lines @@
 var INSTANCE_OF;
 var CALL_NON_FUNCTION;
 var CALL_NON_FUNCTION_AS_CONSTRUCTOR;
 var CALL_FUNCTION_PROXY;
 var CALL_FUNCTION_PROXY_AS_CONSTRUCTOR;
 var CONCAT_ITERABLE_TO_ARRAY;
 var APPLY_PREPARE;
 var REFLECT_APPLY_PREPARE;
 var REFLECT_CONSTRUCT_PREPARE;
 var STACK_OVERFLOW;
-var TO_OBJECT;
 var TO_NUMBER;
 var TO_STRING;
 var TO_NAME;
 
 var $defaultNumber;
 var $defaultString;
 var $NaN;
 var $nonNumberToNumber;
 var $nonStringToString;
 var $sameValue;
 var $sameValueZero;
 var $toBoolean;
 var $toInt32;
 var $toInteger;
 var $toLength;
 var $toName;
 var $toNumber;
-var $toObject;
 var $toPositiveInteger;
 var $toPrimitive;
 var $toString;
 var $toUint32;
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 var GlobalArray = global.Array;
@@ skipping 415 matching lines @@
 }
 
 
 /* -----------------------------
    - - -   H e l p e r s   - - -
    -----------------------------
 */
 
 // ECMA-262, section 11.4.1, page 46.
 DELETE = function DELETE(key, language_mode) {
-  return %DeleteProperty(%$toObject(this), key, language_mode);
+  return %DeleteProperty(TO_OBJECT(this), key, language_mode);
 }
 
 
 // ECMA-262, section 11.8.7, page 54.
 IN = function IN(x) {
   if (!IS_SPEC_OBJECT(x)) {
     throw %MakeTypeError(kInvalidInOperatorUse, this, x);
   }
   if (%_IsNonNegativeSmi(this)) {
     if (IS_ARRAY(x) && %_HasFastPackedElements(x)) {
@@ skipping 197 matching lines @@
 CONCAT_ITERABLE_TO_ARRAY = function CONCAT_ITERABLE_TO_ARRAY(iterable) {
   return %$concatIterableToArray(this, iterable);
 };
 
 
 STACK_OVERFLOW = function STACK_OVERFLOW(length) {
   throw %MakeRangeError(kStackOverflow);
 }
 
 
-// Convert the receiver to an object - forward to ToObject.
-TO_OBJECT = function TO_OBJECT() {
-  return %$toObject(this);
-}
-
-
 // Convert the receiver to a number - forward to ToNumber.
 TO_NUMBER = function TO_NUMBER() {
   return %$toNumber(this);
 }
 
 
 // Convert the receiver to a string - forward to ToString.
 TO_STRING = function TO_STRING() {
   return %$toString(this);
 }
@@ skipping 76 matching lines @@
   return (IS_NULL(x)) ? 'null' : ToString(DefaultString(x));
 }
 
 
 // ES6 symbols
 function ToName(x) {
   return IS_SYMBOL(x) ? x : ToString(x);
 }
 
 
-// ECMA-262, section 9.9, page 36.
-function ToObject(x) {
-  if (IS_STRING(x)) return new GlobalString(x);
-  if (IS_NUMBER(x)) return new GlobalNumber(x);
-  if (IS_BOOLEAN(x)) return new GlobalBoolean(x);
-  if (IS_SYMBOL(x)) return %NewSymbolWrapper(x);
-  if (IS_FLOAT32X4(x)) return %NewFloat32x4Wrapper(x);
-  if (IS_NULL_OR_UNDEFINED(x) && !IS_UNDETECTABLE(x)) {
-    throw MakeTypeError(kUndefinedOrNullToObject);
-  }
-  return x;
-}
-
-
 // ECMA-262, section 9.4, page 34.
 function ToInteger(x) {
   if (%_IsSmi(x)) return x;
   return %NumberToInteger(ToNumber(x));
 }
 
 
 // ES6, draft 08-24-14, section 7.1.15
 function ToLength(arg) {
   arg = ToInteger(arg);
@@ skipping 140 matching lines @@
 $nonNumberToNumber = NonNumberToNumber;
 $nonStringToString = NonStringToString;
 $sameValue = SameValue;
 $sameValueZero = SameValueZero;
 $toBoolean = ToBoolean;
 $toInt32 = ToInt32;
 $toInteger = ToInteger;
 $toLength = ToLength;
 $toName = ToName;
 $toNumber = ToNumber;
-$toObject = ToObject;
 $toPositiveInteger = ToPositiveInteger;
 $toPrimitive = ToPrimitive;
 $toString = ToString;
 $toUint32 = ToUint32;
 
 })