blob: c67808773839d8a984d0c43c07825348f8b37b12 [file] [log] [blame]
// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --opt --no-always-opt
function foo(s) {
return s[5];
}
%PrepareFunctionForOptimization(foo);
assertEquals("f", foo("abcdef"));
assertEquals(undefined, foo("a"));
%OptimizeFunctionOnNextCall(foo);
assertEquals("f", foo("abcdef"));
assertEquals(undefined, foo("a"));
assertOptimized(foo);
// Now mess with the String.prototype.
String.prototype[5] = "5";
assertEquals("f", foo("abcdef"));
%PrepareFunctionForOptimization(foo);
assertEquals("5", foo("a"));
%OptimizeFunctionOnNextCall(foo);
assertEquals("f", foo("abcdef"));
assertEquals("5", foo("a"));
assertOptimized(foo);