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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 --opt --no-lazy-feedback-allocation
var global;
function TestSetWithCustomIterator(ctor) {
const k1 = {};
const k2 = {};
const entries = [k1];
let callCount = 0;
entries[Symbol.iterator] = () => ({
next: () =>
callCount++ === 0
? { value: k2, done: false }
: { done: true }
});
const set = new ctor(entries);
assertFalse(set.has(k1));
assertTrue(set.has(k2));
assertEquals(2, callCount);
// Keep entries alive to avoid collection of the weakly held map in optimized
// code which causes the code to deopt.
global = entries;
}
%PrepareFunctionForOptimization(TestSetWithCustomIterator);
TestSetWithCustomIterator(Set);
TestSetWithCustomIterator(Set);
TestSetWithCustomIterator(Set);
%OptimizeFunctionOnNextCall(TestSetWithCustomIterator);
TestSetWithCustomIterator(Set);
assertOptimized(TestSetWithCustomIterator);
TestSetWithCustomIterator(WeakSet);
%PrepareFunctionForOptimization(TestSetWithCustomIterator);
TestSetWithCustomIterator(WeakSet);
TestSetWithCustomIterator(WeakSet);
%OptimizeFunctionOnNextCall(TestSetWithCustomIterator);
TestSetWithCustomIterator(WeakSet);
assertOptimized(TestSetWithCustomIterator);
function TestMapWithCustomIterator(ctor) {
const k1 = {};
const k2 = {};
const entries = [[k1, 1]];
let callCount = 0;
entries[Symbol.iterator] = () => ({
next: () =>
callCount++ === 0
? { value: [k2, 2], done: false }
: { done: true }
});
const map = new ctor(entries);
assertFalse(map.has(k1));
assertEquals(2, map.get(k2));
assertEquals(2, callCount);
// Keep entries alive to avoid collection of the weakly held map in optimized
// code which causes the code to deopt.
global = entries;
}
%PrepareFunctionForOptimization(TestMapWithCustomIterator);
TestMapWithCustomIterator(Map);
TestMapWithCustomIterator(Map);
TestMapWithCustomIterator(Map);
%OptimizeFunctionOnNextCall(TestMapWithCustomIterator);
TestMapWithCustomIterator(Map);
assertOptimized(TestMapWithCustomIterator);
TestMapWithCustomIterator(WeakMap);
%PrepareFunctionForOptimization(TestMapWithCustomIterator);
TestMapWithCustomIterator(WeakMap);
TestMapWithCustomIterator(WeakMap);
%OptimizeFunctionOnNextCall(TestMapWithCustomIterator);
TestMapWithCustomIterator(WeakMap);
assertOptimized(TestMapWithCustomIterator);
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