dart-sdk/tests/language/optimize/bailout2_test.dart
Robert Nystrom c959c9aba7 Migrate language_2/optimize to NNBD.
Change-Id: I3f67dd79ff2ee745cc2ea161ce7150630e805c97
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150186
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Nicholas Shahan <nshahan@google.com>
2020-06-06 01:42:35 +00:00

27 lines
762 B
Dart

// 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.
import "package:expect/expect.dart";
var a;
main() {
// Write a loop to force a bailout method on [A.foo].
for (int i = 0; i < 10; i++) {
if (a != null) new A().foo([]);
Expect.equals(42, new A().foo(new A()));
}
}
class A {
// In dart2js, the optimized version of foo tries to optimize the
// uses of a.length (which is used two times here: for the index,
// and for the bounds check), and that optimization used to crash
// the compiler.
foo(a) => a[a.length];
int get length => 42;
operator [](index) => 42;
}