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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
4 // Test location summary for Uint32 multiplication. | 4 // Test location summary for Uint32 multiplication. |
5 // VMOptions=--optimization-counter-threshold=5 --no-background-compilation | 5 // VMOptions=--optimization-counter-threshold=5 --no-background-compilation |
6 | 6 |
7 import 'package:expect/expect.dart'; | 7 import 'package:expect/expect.dart'; |
8 | 8 |
9 mintLeftShift(x, y) => x << y; | 9 mintLeftShift(x, y) => x << y; |
10 mintRightShift(x, y) => x >> y; | 10 mintRightShift(x, y) => x >> y; |
11 | 11 |
12 main() { | 12 main() { |
13 for (var i = 0; i < 20; i++) { | 13 for (var i = 0; i < 20; i++) { |
14 var x = 1 + (1 << (i + 32)); | 14 var x = 1 + (1 << (i + 32)); |
15 Expect.equals(x, mintLeftShift(x, 0)); | 15 Expect.equals(x, mintLeftShift(x, 0)); |
16 Expect.equals(x, mintRightShift(x, 0)); | 16 Expect.equals(x, mintRightShift(x, 0)); |
17 Expect.equals(2*x, mintLeftShift(x, 1)); | 17 Expect.equals(2 * x, mintLeftShift(x, 1)); |
18 Expect.equals(x~/2, mintRightShift(x, 1)); | 18 Expect.equals(x ~/ 2, mintRightShift(x, 1)); |
19 Expect.equals(x, mintRightShift(mintLeftShift(x, i), i)); | 19 Expect.equals(x, mintRightShift(mintLeftShift(x, i), i)); |
20 } | 20 } |
21 } | 21 } |
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