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12478684aa
PR-URL: https://github.com/nodejs/node/pull/33579 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com>
33 lines
763 B
JavaScript
33 lines
763 B
JavaScript
// Copyright 2020 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 foo(v) {
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let x = Math.floor(v);
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Number.prototype[v] = 42;
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return x + Math.floor(v);
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}
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%PrepareFunctionForOptimization(foo);
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assertSame(foo(-0), -0);
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assertSame(foo(-0), -0);
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%OptimizeFunctionOnNextCall(foo);
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assertSame(foo(-0), -0);
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function bar(v) {
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v = v ? (v|0) : -0; // v has now type Integral32OrMinusZero.
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let x = Math.floor(v);
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Number.prototype[v] = 42;
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return x + Math.floor(v);
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}
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%PrepareFunctionForOptimization(bar);
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assertSame(2, bar(1));
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assertSame(2, bar(1));
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%OptimizeFunctionOnNextCall(bar);
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assertSame(-0, bar(-0));
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