diff test/compiler/5091921/Test7020614.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
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/5091921/Test7020614.java	Wed May 04 13:12:42 2011 -0700
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+/*
+ * 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 7020614
+ * @summary "-server" mode optimizer makes code hang
+ *
+ * @run main/othervm/timeout=30 -Xbatch Test7020614
+ */
+
+public class Test7020614 {
+
+    private static final int ITERATIONS = 1000;
+    private static int doNotOptimizeOut = 0;
+
+    public static long bitCountShort() {
+        long t0 = System.currentTimeMillis();
+        int sum = 0;
+        for (int it = 0; it < ITERATIONS; ++it) {
+            short value = 0;
+            do {
+                sum += Integer.bitCount(value);
+            } while (++value != 0);
+        }
+        doNotOptimizeOut += sum;
+        return System.currentTimeMillis() - t0;
+    }
+
+    public static void main(String[] args) {
+        for (int i = 0; i < 4; ++i) {
+            System.out.println((i + 1) + ": " + bitCountShort());
+        }
+        System.out.println("doNotOptimizeOut value: " + doNotOptimizeOut);
+    }
+}
+