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c7b3292251
PR-URL: https://github.com/nodejs/node/pull/36139 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Myles Borins <myles.borins@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com>
27 lines
588 B
JavaScript
27 lines
588 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 IsDataView(obj) {
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return obj.getFloat64;
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}
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%NeverOptimizeFunction(IsDataView);
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function bar(obj) {
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if (IsDataView(obj)) obj.getFloat64(0);
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}
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%PrepareFunctionForOptimization(bar);
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bar(new DataView(new ArrayBuffer(42)));
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const proxy = new Proxy({}, {});
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function foo() { bar(proxy) }
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%PrepareFunctionForOptimization(foo);
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foo();
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%OptimizeFunctionOnNextCall(foo);
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foo();
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