| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| // Test efficient and correct implementation of !identical(a, b). |
| // VMOptions=--optimization-counter-threshold=10 --no-background-compilation |
| |
| // @dart = 2.9 |
| |
| import 'package:expect/expect.dart'; |
| |
| notIdenticalTest1(a) { |
| if (!identical("ho", a)) { |
| return 2; |
| } else { |
| return 1; |
| } |
| } |
| |
| notIdenticalTest2(a) { |
| var x = identical("ho", a); |
| if (!x) { |
| Expect.equals(false, x); |
| return x; |
| } else { |
| Expect.equals(true, x); |
| return 1; |
| } |
| } |
| |
| notIdenticalTest3(a) { |
| var x = identical("ho", a); |
| return !x; |
| } |
| |
| main() { |
| for (int i = 0; i < 20; i++) { |
| Expect.equals(1, notIdenticalTest1("ho")); |
| Expect.equals(1, notIdenticalTest2("ho")); |
| Expect.equals(false, notIdenticalTest3("ho")); |
| } |
| } |