test/hotspot/jtreg/compiler/loopopts/TestStripMinedBackToBackIfs.java
changeset 48713 efa7f1a283e4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/loopopts/TestStripMinedBackToBackIfs.java	Tue Jan 30 09:08:44 2018 +0100
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2018, Red Hat, Inc. 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 8196296
+ * @summary Bad graph when unrolled loop bounds conflicts with range checks
+ *
+ * @run main/othervm -XX:-BackgroundCompilation -XX:+IgnoreUnrecognizedVMOptions -XX:LoopUnrollLimit=0 TestStripMinedBackToBackIfs
+ *
+ */
+
+
+public class TestStripMinedBackToBackIfs {
+    public static void main(String[] args) {
+        for (int i = 0; i < 20_000; i++) {
+            test(100);
+        }
+    }
+
+    private static double test(int limit) {
+        double v = 1;
+        for (int i = 0; i < limit; i++) {
+            v = v * 4;
+            // We don't want this test to be merged with identical
+            // loop end test
+            if (i+1 < limit) {
+                v = v * 2;
+            }
+        }
+        return v;
+    }
+}