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fd4f80ce54
PR-URL: https://github.com/nodejs/node/pull/42657 Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com>
32 lines
772 B
JavaScript
32 lines
772 B
JavaScript
// Copyright 2019 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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//
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// Flags: --allow-natives-syntax --opt --noalways-opt
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class C {};
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const c = new C;
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const getPrototypeOf = Object.getPrototypeOf;
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function bar(f) {
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return f();
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}
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function foo() {
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return bar(getPrototypeOf.bind(undefined, c));
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}
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%PrepareFunctionForOptimization(foo);
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%PrepareFunctionForOptimization(bar);
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bar(function() {});
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foo();
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%OptimizeFunctionOnNextCall(foo);
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foo();
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assertOptimized(foo);
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c.prop = 42;
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// Assert that the call reducer optimized the call to Object.getPrototypeOf
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// by asserting that foo gets deopted when c's previous map becomes
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// unstable.
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foo();
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assertUnoptimized(foo);
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