John Messerly
32 lines
694 B
Dart
32 lines
694 B
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test that a loop invariant code motion optimization correctly hoists
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// instructions that may cause deoptimization.
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import "package:expect/expect.dart";
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foo(o) {
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var r = 0;
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for (var i = 0; i < 3; i++) {
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r += o.z;
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}
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return r;
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}
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class A {
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var z = 3;
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}
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main() {
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var a = new A();
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for(var i = 0; i < 10000; i++) foo(a);
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Expect.equals(9, foo(a));
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Expect.throws(() => foo(42));
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for(var i = 0; i < 10000; i++) foo(a);
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Expect.throws(() => foo(42));
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}
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