47 lines
808 B
JavaScript
47 lines
808 B
JavaScript
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// Copyright 2022 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 --maglev
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(function() {
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var A = {};
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A[Symbol.hasInstance] = function(x) {
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return 1;
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};
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var a = {};
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function foo(o) {
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return o instanceof A;
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};
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%PrepareFunctionForOptimization(foo);
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foo(a);
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foo(a);
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assertSame(foo(a), true);
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%OptimizeMaglevOnNextCall(foo);
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assertSame(foo(a), true);
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})();
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(function() {
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var A = {};
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A[Symbol.hasInstance] = function(x) {
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%DeoptimizeFunction(foo);
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return 1;
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};
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var a = {};
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function foo(o) {
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return o instanceof A;
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};
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%PrepareFunctionForOptimization(foo);
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foo(a);
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foo(a);
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assertSame(foo(a), true);
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%OptimizeMaglevOnNextCall(foo);
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assertSame(foo(a), true);
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})();
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