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Unified 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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« runtime/vm/code_generator.cc ('K') | « runtime/vm/resolver_test.cc ('k') | no next file » | no next file with comments »
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Index: tests/language/deopt_lazy_finalization_test.dart
===================================================================
--- tests/language/deopt_lazy_finalization_test.dart (revision 0)
+++ tests/language/deopt_lazy_finalization_test.dart (working copy)
@@ -0,0 +1,42 @@
+// Copyright (c) 2012, 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 deoptimziation caused by lazy finalization.
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr
+
+import "package:expect/expect.dart";
+
+main() {
+ Expect.equals(20000, part1());
+ // Trigger lazy finalization of class B, which should invalidate
+ // optimized code for A.loop.
+ Expect.equals(-20000, part2());
+}
+
+part1() {
+ var a = new A();
+ a.loop();
+ 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
+}
+
+part2() {
+ var b = new B();
+ b.loop();
+ return b.loop();
regis 2013/11/21 21:48:18 ditto
srdjan 2013/11/21 22:25:00 Done.
+}
+
+class A {
+ foo() => 2;
+
+ loop() {
+ var sum = 0;
+ for (int i = 0; i < 10000; i++) {
+ sum += foo();
+ }
+ return sum;
+ }
+}
+
+class B extends A {
+ foo() => -2;
+}
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