27 lines
515 B
JavaScript
27 lines
515 B
JavaScript
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// 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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// Flags: --allow-natives-syntax --no-always-opt --opt
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const r = RegExp('bla');
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function foo() {
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r.test('string');
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}
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%PrepareFunctionForOptimization(foo);
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foo();
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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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r.__proto__.exec = function() {
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return null;
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}
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Object.freeze(r.__proto__);
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foo();
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assertUnoptimized(foo);
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