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9b4bf7de6c
PR-URL: https://github.com/nodejs/node/pull/23423 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Myles Borins <myles.borins@gmail.com>
51 lines
1.1 KiB
JavaScript
51 lines
1.1 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
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// Known symbols strict equality.
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(function() {
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const a = Symbol("a");
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const b = Symbol("b");
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function foo() { return a === b; }
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assertFalse(foo());
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assertFalse(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo());
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})();
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// Known symbol on one side strict equality.
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(function() {
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const a = Symbol("a");
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const b = Symbol("b");
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function foo(a) { return a === b; }
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assertTrue(foo(b));
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assertFalse(foo(a));
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assertTrue(foo(b));
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assertFalse(foo(a));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(b));
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assertFalse(foo(a));
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})();
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// Feedback based symbol strict equality.
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(function() {
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const a = Symbol("a");
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const b = Symbol("b");
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function foo(a, b) { return a === b; }
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assertTrue(foo(b, b));
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assertFalse(foo(a, b));
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assertTrue(foo(a, a));
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assertFalse(foo(b, a));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(a, a));
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assertFalse(foo(b, a));
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})();
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