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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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 // VMOptions=--optimization-counter-threshold=10 --no-background-compilation | 4 // VMOptions=--optimization-counter-threshold=10 --no-background-compilation |
5 | 5 |
6 import "package:expect/expect.dart"; | 6 import "package:expect/expect.dart"; |
7 | 7 |
8 // This is a test for deoptimization infrastructure and to reproduce the | 8 // This is a test for deoptimization infrastructure and to reproduce the |
9 // failure from bug 5442338. | 9 // failure from bug 5442338. |
10 | 10 |
11 main() { | 11 main() { |
12 warmup(); | 12 warmup(); |
13 runTest(); | 13 runTest(); |
14 } | 14 } |
15 | 15 |
16 // Create a situation where method 'call' is optimized for using class A | 16 // Create a situation where method 'call' is optimized for using class A |
17 // when calling foo. | 17 // when calling foo. |
18 warmup() { | 18 warmup() { |
19 List a = [ new A(), new A(), new A(), new A()]; | 19 List a = [new A(), new A(), new A(), new A()]; |
20 var res = 0; | 20 var res = 0; |
21 for (int i = 0; i < 20; i++) { | 21 for (int i = 0; i < 20; i++) { |
22 res = call(a, 0); | 22 res = call(a, 0); |
23 } | 23 } |
24 Expect.equals(10, res); | 24 Expect.equals(10, res); |
25 } | 25 } |
26 | 26 |
27 | |
28 // Create a situation where several optimized frames of 'call' are on stack | 27 // Create a situation where several optimized frames of 'call' are on stack |
29 // when deoptimization occurs because B.foo is called. After the first | 28 // when deoptimization occurs because B.foo is called. After the first |
30 // deoptimization, several optimized frames of 'call' are still on stack and | 29 // deoptimization, several optimized frames of 'call' are still on stack and |
31 // some of them will be deoptimized. | 30 // some of them will be deoptimized. |
32 runTest() { | 31 runTest() { |
33 List a = [ new A(), new A(), new B(), new A(), new B(), new B()]; | 32 List a = [new A(), new A(), new B(), new A(), new B(), new B()]; |
34 var res = call(a, 0); | 33 var res = call(a, 0); |
35 Expect.equals(35, res); | 34 Expect.equals(35, res); |
36 } | 35 } |
37 | 36 |
38 // This method will be optimized for using class A when calling 'foo' and | 37 // This method will be optimized for using class A when calling 'foo' and |
39 // later will be deoptimized because B.foo is required. | 38 // later will be deoptimized because B.foo is required. |
40 call(List a, int n) { | 39 call(List a, int n) { |
41 if (n < a.length) { | 40 if (n < a.length) { |
42 var sum = call(a, n + 1); | 41 var sum = call(a, n + 1); |
43 for (int i = n; i < a.length; i++) { | 42 for (int i = n; i < a.length; i++) { |
44 sum += a[i].foo(); | 43 sum += a[i].foo(); |
45 } | 44 } |
46 return sum; | 45 return sum; |
47 } | 46 } |
48 return 0; | 47 return 0; |
49 } | 48 } |
50 | 49 |
51 | |
52 class A { | 50 class A { |
53 foo() { return 1; } | 51 foo() { |
| 52 return 1; |
| 53 } |
54 } | 54 } |
55 | 55 |
56 | |
57 class B { | 56 class B { |
58 foo() { return 2; } | 57 foo() { |
| 58 return 2; |
| 59 } |
59 } | 60 } |
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