32 lines
629 B
JavaScript
32 lines
629 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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//
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// Flags: --allow-natives-syntax --opt --no-always-opt
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let string = "foobar";
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function f(useArrayIndex) {
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let index = useArrayIndex ? '1': '4294967296';
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return string.charCodeAt(index);
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}
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%PrepareFunctionForOptimization(f);
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f(true);
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f(true);
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%OptimizeFunctionOnNextCall(f);
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f(false);
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assertUnoptimized(f);
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%PrepareFunctionForOptimization(f);
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f(true);
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f(true);
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%OptimizeFunctionOnNextCall(f);
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f(true);
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// no deopt here
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f(false);
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assertOptimized(f);
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