v8/test/mjsunit/regress/regress-store-heapobject.js

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// Copyright 2014 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
var o = {a: undefined};
function store(o, v) {
o.a = v;
}
store(o, undefined);
store(o, undefined);
function f(bool) {
var o = {a: undefined};
if (bool) {
store(o, 1);
}
return o;
}
f(false);
f(false);
%OptimizeFunctionOnNextCall(f);
f(true);