fschneider@google.com
3208230580
This CL temporarily remove deoptimzation history which was put in to prevent repeated deoptimization caused by loop invariant code motion. It caused illegal code motion under certain conditions. BUG=https://code.google.com/p/dart/issues/detail?id=11245 TEST=tests/language/licm3_test.dart Review URL: https://codereview.chromium.org//16844011 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@23989 260f80e4-7a28-3924-810f-c04153c831b5
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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