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Side by Side Diff: tests/language/deopt_lazy_finalization_test.dart

Issue 81333003: Do not eagerly finalize classes in CHA, instead regard unfinalized classes as ’non-existent’ an… (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 7 years, 1 month ago
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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 deoptimziation caused by lazy finalization.
5 // VMOptions=--optimization-counter-threshold=10 --no-use-osr
6
7 import "package:expect/expect.dart";
8
9 main() {
10 Expect.equals(20000, part1());
11 // Trigger lazy finalization of class B, which should invalidate
12 // optimized code for A.loop.
13 Expect.equals(-20000, part2());
14 }
15
16 part1() {
17 var a = new A();
18 a.loop();
19 return a.loop();
regis 2013/11/21 21:48:18 If there is a reason to call a.loop() twice, you s
srdjan 2013/11/21 22:25:00 Added comments. The reason is that only second tim
20 }
21
22 part2() {
23 var b = new B();
24 b.loop();
25 return b.loop();
regis 2013/11/21 21:48:18 ditto
srdjan 2013/11/21 22:25:00 Done.
26 }
27
28 class A {
29 foo() => 2;
30
31 loop() {
32 var sum = 0;
33 for (int i = 0; i < 10000; i++) {
34 sum += foo();
35 }
36 return sum;
37 }
38 }
39
40 class B extends A {
41 foo() => -2;
42 }
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