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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
function p(x) {
this.x = x;
}
function f() {
var a = new p(1), b = new p(2);
for (var i = 0; i < 1; i++) {
a.x += b.x;
}
return a.x;
}
new p(0.1); // make 'x' mutable box double field in p.
assertEquals(3, f());
assertEquals(3, f());
%OptimizeFunctionOnNextCall(f);
assertEquals(3, f());
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