dart-sdk/tests/language/vm/optimized_polymorphic_list_access_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

28 lines
751 B
Dart

// Copyright (c) 2013, 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=--optimization_counter_threshold=10 --no-background_compilation
import "package:expect/expect.dart";
// Test correct polymorphic inlining of recognized methods like list access.
test(arr) {
var r = 0;
for (var i = 0; i < 1; ++i) {
r += arr[0] as int;
}
return r;
}
main() {
var a = new List<int?>.filled(1, null);
a[0] = 0;
var b = <int>[0];
Expect.equals(0, test(a));
Expect.equals(0, test(b));
for (var i = 0; i < 20; ++i) test(a);
Expect.equals(0, test(a));
Expect.equals(0, test(b));
}