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// Copyright 2018 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.
// Flags: --allow-natives-syntax
(function() {
function SetX(o, v) {
o.x = v;
}
function SetY(o, v) {
o.y = v;
}
var p = {};
function Create() {
var o = {__proto__:p, b:1, a:2};
delete o.b;
assertFalse(%HasFastProperties(o));
return o;
}
for (var i = 0; i < 10; i++) {
var o = Create();
SetX(o, 13);
SetY(o, 13);
}
Object.defineProperty(p, "x", {value:42, configurable: true, writable: false});
for (var i = 0; i < 10; i++) {
var o = Create();
SetY(o, 13);
}
var o = Create();
assertEquals(42, o.x);
SetX(o, 13);
assertEquals(42, o.x);
})();
(function() {
var p1 = {a:10};
Object.defineProperty(p1, "x", {value:42, configurable: true, writable: false});
var p2 = {__proto__: p1, x:153};
for (var i = 0; i < 2000; i++) {
p1["p" + i] = 0;
p2["p" + i] = 0;
}
assertFalse(%HasFastProperties(p1));
assertFalse(%HasFastProperties(p2));
function GetX(o) {
return o.x;
}
function SetX(o, v) {
o.x = v;
}
function Create() {
var o = {__proto__:p2, b:1, a:2};
return o;
}
for (var i = 0; i < 10; i++) {
var o = Create();
assertEquals(153, GetX(o));
SetX(o, 13);
assertEquals(13, GetX(o));
}
delete p2.x;
assertFalse(%HasFastProperties(p1));
assertFalse(%HasFastProperties(p2));
var o = Create();
assertEquals(42, GetX(o));
SetX(o, 13);
assertEquals(42, GetX(o));
})();
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