Mercurial > hg > graal-compiler
diff test/compiler/5091921/Test6992759.java @ 3345:bad7ecd0b6ed
5091921: Sign flip issues in loop optimizer
Summary: Fix integer overflow problem in the code generated by loop optimizer.
Reviewed-by: never
author | kvn |
---|---|
date | Wed, 04 May 2011 13:12:42 -0700 |
parents | |
children | 514efad5e81a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/5091921/Test6992759.java Wed May 04 13:12:42 2011 -0700 @@ -0,0 +1,66 @@ +/* + * 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 6992759 + * @summary Bad code generated for integer <= comparison, fails for Integer.MAX_VALUE + * + * @run main Test6992759 + */ + +public class Test6992759 { + + static final int N_TESTS = 1000000000; + + public static void main(String[] args) throws Exception { + + /* + * If MAX_VALUE is changed to MAX_VALUE - 1 below, the test passes + * because (apparently) bad code is only generated when comparing + * <= MAX_VALUE in the doTest method. + */ + Test6992759 test = new Test6992759(); + for (int i = 0; i < N_TESTS; i += 1) { + test.doTest(10, Integer.MAX_VALUE, i); + //test.doTest(10, Integer.MAX_VALUE - 1, i); + } + System.out.println("No failure"); + } + + void doTest(int expected, int max, int i) { + int counted; + for (counted = 0; + (counted <= max) && (counted < expected); + counted += 1) { + } + if (counted != expected) { + throw new RuntimeException("Failed test iteration=" + i + + " max=" + max + + " counted=" + counted + + " expected=" + expected); + } + } +} +