| // 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 --turbo-escape | 
 |  | 
 | function get1(l, b) { | 
 |     return l[1]; | 
 | } | 
 |  | 
 | function with_double(x) { | 
 |     var o = {a: [x,x,x]}; | 
 |     o.a.some_property = 1; | 
 |     return get1(o.a); | 
 | } | 
 |  | 
 | function with_tagged(x) { | 
 |     var l = [{}, x,x]; | 
 |     return get1(l); | 
 | } | 
 |  | 
 | with_double(.5); | 
 | with_tagged({}); | 
 | with_double(.6); | 
 | with_tagged(null); | 
 | with_double(.5); | 
 | with_tagged({}); | 
 | %OptimizeFunctionOnNextCall(with_double); | 
 | with_double(.7); |