blob: 15f916cfbd248d285a9192c656e44718cb9d5304 [file] [log] [blame]
// 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.
// @dart = 2.9
// Test that a loop invariant code motion optimization correctly hoists
// instructions that may cause deoptimization.
import "package:expect/expect.dart";
foo(o) {
var r = 0;
for (var i = 0; i < 3; i++) {
r += o.z;
}
return r;
}
class A {
var z = 3;
}
main() {
var a = new A();
for (var i = 0; i < 10000; i++) foo(a);
Expect.equals(9, foo(a));
Expect.throws(() => foo(42));
for (var i = 0; i < 10000; i++) foo(a);
Expect.throws(() => foo(42));
}