56 lines
1.2 KiB
JavaScript
56 lines
1.2 KiB
JavaScript
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// 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() {
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function foo(x) { return Number.isNaN(x); }
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assertTrue(foo(+undefined));
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assertFalse(foo(undefined));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(+undefined));
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assertFalse(foo(undefined));
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})();
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(function() {
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function foo(x) { return Number.isNaN(+x); }
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assertTrue(foo(+undefined));
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assertFalse(foo(0));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(+undefined));
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assertFalse(foo(0));
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})();
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(function() {
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function foo(x) { return Number.isNaN(x|0); }
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assertFalse(foo(+undefined));
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assertFalse(foo(0));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo(+undefined));
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assertFalse(foo(0));
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})();
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(function() {
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function foo(x) { return Number.isNaN("" + x); }
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assertFalse(foo(undefined));
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assertFalse(foo(0));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(foo(undefined));
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assertFalse(foo(0));
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})();
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(function() {
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function foo(x) { return Number.isNaN(0/0); }
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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assertTrue(foo());
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})();
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