dart-sdk/tests/language/vm/irreducible_loop_test.dart
Robert Nystrom 2034061433 Migrate language_2/vm to NNBD.
Change-Id: I313a57ed7c7ea2ada75065f55a7367376f6bdae5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/152183
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Srujan Gaddam <srujzs@google.com>
2020-06-25 20:39:23 +00:00

33 lines
849 B
Dart

// Copyright (c) 2018, 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.
// VMOptions=--no_background_compilation --optimization_counter_threshold=10
import "package:expect/expect.dart";
// This method forms an infinite, irreducible loop. As long as we
// don't enter any of the branches, the method terminates. The test
// is included to ensure an irreducible loop does not break anything
// in the compiler.
int bar(int x) {
switch (x) {
case_1:
case 1:
continue case_2;
case_2:
case 2:
continue case_1;
}
return x;
}
main() {
for (var i = -50; i <= 0; i++) {
Expect.equals(i, bar(i));
}
for (var i = 3; i <= 50; i++) {
Expect.equals(i, bar(i));
}
}