mirror of
https://github.com/tc39/test262.git
synced 2025-05-04 15:00:42 +02:00
7298a38552
sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
26 lines
824 B
JavaScript
26 lines
824 B
JavaScript
// Copyright 2015 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 --no-stress-opt --opt --no-always-opt
|
|
|
|
// --nostress-opt is specified because the test corrupts the "pristine"
|
|
// array prototype chain by storing an element, and this is tracked
|
|
// per-isolate. A subsequent stress run would send the load generic,
|
|
// and no more deoptimizations of foo would occur.
|
|
|
|
function foo(a, i) { return a[i]; }
|
|
|
|
var a = ['one', , 'three'];
|
|
foo(a, 0);
|
|
foo(a, 0);
|
|
foo(a, 0);
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(undefined, foo(a, 1));
|
|
assertOptimized(foo);
|
|
|
|
// Whereas if we disrupt the prototype chain...
|
|
Array.prototype[1] = 'cow';
|
|
assertEquals('cow', foo(a, 1));
|
|
assertUnoptimized(foo);
|