[runtime] Replace the EQUALS builtin with proper Object::Equals.

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 24 matching lines @@
 var isConcatSpreadableSymbol =
     utils.ImportNow("is_concat_spreadable_symbol");
 
 // ----------------------------------------------------------------------------
 
 /* -----------------------------------
 - - -   C o m p a r i s o n   - - -
 -----------------------------------
 */
 
-// ECMA-262 Section 11.9.3.
-function EQUALS(y) {
-  if (IS_STRING(this) && IS_STRING(y)) return %StringEquals(this, y);
-  var x = this;
-
-  while (true) {
-    if (IS_NUMBER(x)) {
-      while (true) {
-        if (IS_NUMBER(y)) return %NumberEquals(x, y);
-        if (IS_NULL_OR_UNDEFINED(y)) return 1;  // not equal
-        if (!IS_SPEC_OBJECT(y)) {
-          if (IS_SYMBOL(y) || IS_SIMD_VALUE(y)) return 1;  // not equal
-          // String or boolean.
-          return %NumberEquals(x, %to_number_fun(y));
-        }
-        y = %to_primitive(y, NO_HINT);
-      }
-    } else if (IS_STRING(x)) {
-      while (true) {
-        if (IS_STRING(y)) return %StringEquals(x, y);
-        if (IS_NUMBER(y)) return %NumberEquals(%to_number_fun(x), y);
-        if (IS_BOOLEAN(y)) {
-          return %NumberEquals(%to_number_fun(x), %to_number_fun(y));
-        }
-        if (IS_NULL_OR_UNDEFINED(y)) return 1;  // not equal
-        if (IS_SYMBOL(y) || IS_SIMD_VALUE(y)) return 1;  // not equal
-        y = %to_primitive(y, NO_HINT);
-      }
-    } else if (IS_SYMBOL(x)) {
-      if (IS_SYMBOL(y)) return %_ObjectEquals(x, y) ? 0 : 1;
-      return 1; // not equal
-    } else if (IS_BOOLEAN(x)) {
-      if (IS_BOOLEAN(y)) return %_ObjectEquals(x, y) ? 0 : 1;
-      if (IS_NULL_OR_UNDEFINED(y)) return 1;
-      if (IS_NUMBER(y)) return %NumberEquals(%to_number_fun(x), y);
-      if (IS_STRING(y)) {
-        return %NumberEquals(%to_number_fun(x), %to_number_fun(y));
-      }
-      if (IS_SYMBOL(y) || IS_SIMD_VALUE(y)) return 1;  // not equal
-      // y is object.
-      x = %to_number_fun(x);
-      y = %to_primitive(y, NO_HINT);
-    } else if (IS_NULL_OR_UNDEFINED(x)) {
-      return IS_NULL_OR_UNDEFINED(y) ? 0 : 1;
-    } else if (IS_SIMD_VALUE(x)) {
-      if (!IS_SIMD_VALUE(y)) return 1;  // not equal
-       return %SimdEquals(x, y);
-    } else {
-      // x is an object.
-      if (IS_SPEC_OBJECT(y)) return %_ObjectEquals(x, y) ? 0 : 1;
-      if (IS_NULL_OR_UNDEFINED(y)) return 1;  // not equal
-      if (IS_BOOLEAN(y)) {
-        y = %to_number_fun(y);
-      } else if (IS_SYMBOL(y) || IS_SIMD_VALUE(y)) {
-        return 1;  // not equal
-      }
-      x = %to_primitive(x, NO_HINT);
-    }
-  }
-}
-
-
 // ECMA-262, section 11.8.5, page 53. The 'ncr' parameter is used as
 // the result when either (or both) the operands are NaN.
 function COMPARE(x, ncr) {
   var left;
   var right;
   // Fast cases for string, numbers and undefined compares.
   if (IS_STRING(this)) {
     if (IS_STRING(x)) return %_StringCompare(this, x);
     if (IS_UNDEFINED(x)) return ncr;
     left = this;
@@ skipping 374 matching lines @@
 $toNumber = ToNumber;
 $toPositiveInteger = ToPositiveInteger;
 $toPrimitive = ToPrimitive;
 $toString = ToString;
 
 %InstallToContext([
   "apply_prepare_builtin", APPLY_PREPARE,
   "compare_builtin", COMPARE,
   "compare_strong_builtin", COMPARE_STRONG,
   "concat_iterable_to_array_builtin", CONCAT_ITERABLE_TO_ARRAY,
-  "equals_builtin", EQUALS,
   "reflect_apply_prepare_builtin", REFLECT_APPLY_PREPARE,
   "reflect_construct_prepare_builtin", REFLECT_CONSTRUCT_PREPARE,
 ]);
 
 %InstallToContext([
   "concat_iterable_to_array", ConcatIterableToArray,
   "non_number_to_number", NonNumberToNumber,
   "non_string_to_string", NonStringToString,
   "to_integer_fun", ToInteger,
   "to_length_fun", ToLength,
   "to_number_fun", ToNumber,
   "to_primitive", ToPrimitive,
   "to_string_fun", ToString,
 ]);
 
 utils.Export(function(to) {
   to.ToBoolean = ToBoolean;
   to.ToLength = ToLength;
   to.ToNumber = ToNumber;
   to.ToPrimitive = ToPrimitive;
   to.ToString = ToString;
 });
 
 })