Mercurial > hg > truffle
diff test/compiler/5091921/Test6897150.java @ 3433:7c948af3e651
Merge
author | asaha |
---|---|
date | Tue, 24 May 2011 11:09:39 -0700 |
parents | bad7ecd0b6ed |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/5091921/Test6897150.java Tue May 24 11:09:39 2011 -0700 @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +/** + * @test + * @bug 6897150 + * @summary Hotspot optimises away a valid loop + * + * @run main Test6897150 + */ + +// Should be compiled with javac from JDK1.3 to get bytecode which shows the problem. +public class Test6897150 { + public static void main(String[] args) { + // This works + loopAndPrint(Integer.MAX_VALUE -1); + // This doesn't + loopAndPrint(Integer.MAX_VALUE); + } + + static void verify(int max, int a) { + if ( a != (max - 1)) { + System.out.println("Expected: " + (max - 1)); + System.out.println("Actual : " + a); + System.exit(97); + } + } + static void loopAndPrint(int max) { + int a = -1; + int i = 1; + for (; i < max; i++) { + a = i; + } + verify(max, a); + } +} +