9c5053bf4d
- Add Map, WeakMap, Set, and WeakSet initial prototype maps to native context. - Set and WeakSet constructors check whether prototype map differs from initial before choosing the fast path. Bug: chromium:798026 Change-Id: I5f9cc2463f89e17f06a66b565c625fce133d01fb Reviewed-on: https://chromium-review.googlesource.com/853698 Commit-Queue: Peter Wong <peter.wm.wong@gmail.com> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Reviewed-by: Camillo Bruni <cbruni@chromium.org> Cr-Commit-Position: refs/heads/master@{#50691}
54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
// Copyright 2018 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 --opt
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function TestMapConstructorEntrySideEffect(ctor) {
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const originalPrototypeSet = ctor.prototype.set;
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const k1 = {};
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const k2 = {};
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let callCount = 0;
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const input = [
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Object.defineProperty([, 1], "0", {
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get() {
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// Verify continuation retains original set function
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ctor.prototype.set = () => {
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callCount++;
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};
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return k1;
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}
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}),
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[k2, 2]
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];
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const col = new ctor(input);
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assertEquals(0, callCount);
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if ('size' in col) assertEquals(2, col.size);
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assertTrue(col.has(k1));
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assertTrue(col.has(k2));
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const col2 = new ctor(input);
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assertEquals(2, callCount);
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if ('size' in col) assertEquals(0, col2.size);
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assertFalse(col2.has(k1));
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assertFalse(col2.has(k2));
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ctor.prototype.set = originalPrototypeSet;
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}
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TestMapConstructorEntrySideEffect(Map);
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TestMapConstructorEntrySideEffect(Map);
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TestMapConstructorEntrySideEffect(Map);
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%OptimizeFunctionOnNextCall(TestMapConstructorEntrySideEffect);
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TestMapConstructorEntrySideEffect(Map);
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assertOptimized(TestMapConstructorEntrySideEffect);
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TestMapConstructorEntrySideEffect(WeakMap);
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TestMapConstructorEntrySideEffect(WeakMap);
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TestMapConstructorEntrySideEffect(WeakMap);
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%OptimizeFunctionOnNextCall(TestMapConstructorEntrySideEffect);
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TestMapConstructorEntrySideEffect(WeakMap);
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assertOptimized(TestMapConstructorEntrySideEffect);
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