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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 // Test correct usage of inlined double temporary objects. | |
| 5 | |
| 6 import "package:expect/expect.dart"; | |
| 7 | |
| 8 main() { | |
| 9 for (int i = 0; i < 2000; i++) { | |
| 10 testBinaryOp(); | |
| 11 testUnaryOp(); | |
| 12 } | |
| 13 } | |
| 14 | |
| 15 // VM: temporary double should not be used as result of division, | |
| 16 // otherwise the function always returns the same object. | |
| 17 double divide(double a, double b) { | |
| 18 return a / b; | |
| 19 } | |
| 20 | |
| 21 testBinaryOp() { | |
| 22 var x = divide(1.0, 2.0); | |
| 23 var y = divide(2.0, 3.0); | |
| 24 Expect.notEquals(x, y); | |
| 25 } | |
| 26 | |
| 27 // VM: temporary double should be used only for "-b", otherwise the | |
| 28 // function would always return the same object. | |
| 29 double unary(double a, double b) { | |
| 30 return -(a * (-b)); | |
| 31 } | |
| 32 | |
| 33 testUnaryOp() { | |
| 34 var x = unary(1.0, 2.0); | |
| 35 var y = unary(3.0, 4.0); | |
| 36 Expect.equals(2.0, x); | |
| 37 } | |
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