409d018005
Where the arguments have already been inlined, we can replace these calls with a direct call to construct. We have to make sure that the iteration over the arguments is not observable. BUG=v8:5895 Review-Url: https://codereview.chromium.org/2659623002 Cr-Commit-Position: refs/heads/master@{#42765}
52 lines
1.0 KiB
JavaScript
52 lines
1.0 KiB
JavaScript
// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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(function modifyArrayIterator() {
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'use strict';
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class Point {
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constructor(x, y) {
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this.x = x;
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this.y = y;
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}
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}
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class RestPoint extends Point {
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constructor(...args) {
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super(...args);
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}
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}
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function testRestPoint(x, y) {
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return new RestPoint(x, y);
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}
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testRestPoint(1, 2);
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testRestPoint(1, 2);
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% OptimizeFunctionOnNextCall(testRestPoint);
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var r = testRestPoint(1, 2);
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assertInstanceof(r, RestPoint);
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assertInstanceof(r, Point);
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assertEquals(1, r.x);
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assertEquals(2, r.y);
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Object.defineProperty(Array.prototype, Symbol.iterator, {
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value: function*
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() {
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yield 3;
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yield 4;
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},
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configurable: true
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});
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var r2 = testRestPoint(1, 2);
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assertInstanceof(r2, RestPoint);
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assertInstanceof(r2, Point);
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assertEquals(3, r2.x);
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assertEquals(4, r2.y);
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})();
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