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| 1 // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Flags: --allow-natives-syntax |
| 6 |
| 7 var a = {} |
| 8 var b = {} |
| 9 a.x = 1; |
| 10 a.y = 1; |
| 11 b.x = 1; |
| 12 |
| 13 function foo(c) { |
| 14 var s = 0; |
| 15 for (var p in c) { s++; } |
| 16 return s; |
| 17 } |
| 18 |
| 19 assertEquals(2, foo(a)); |
| 20 assertEquals(1, foo(b)); |
| 21 %OptimizeFunctionOnNextCall(foo); |
| 22 assertEquals(2, foo(a)); |
| 23 assertEquals(1, foo(b)); |
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