diff -r a4cdca87152b -r 77148b8bb7a1 test/hotspot/jtreg/compiler/loopopts/LoopRotateBadNodeBudget.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/loopopts/LoopRotateBadNodeBudget.java	Wed Oct 23 12:51:53 2019 +0200
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2019, 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 8231565
+ * @summary Node estimate for loop rotate is not correct/sufficient:
+ *          assert(delta <= 2 * required) failed: Bad node estimate ...
+ *
+ * @requires !vm.graal.enabled
+ *
+ * @run main/othervm -XX:PartialPeelNewPhiDelta=5 LoopRotateBadNodeBudget
+ * @run main/othervm -Xbatch -XX:PartialPeelNewPhiDelta=5 LoopRotateBadNodeBudget
+ *
+ * @run main/othervm LoopRotateBadNodeBudget
+ * @run main/othervm -Xbatch LoopRotateBadNodeBudget
+ *
+ * NOTE: Test-case seldom manifesting the problem on fast machines.
+ */
+
+public class LoopRotateBadNodeBudget {
+
+    int h;
+    float j(int a, int b) {
+        double d = 0.19881;
+        int c, e[] = new int[9];
+        c = 1;
+        while (++c < 12)
+            switch ((c % 7 * 5) + 122) {
+                case 156:
+                case 46128:
+                case 135:
+                case 148:
+                case 127:
+                    break;
+                default:
+            }
+        while ((d += 2) < 62)
+            ;
+        long k = l(e);
+        return k;
+    }
+    long l(int[] a) {
+        long m = 0;
+        for (int i = 0; i < a.length; i++)
+            m = a[i];
+        return m;
+    }
+    void f(String[] g) {
+        int i = 2;
+        for (; i < 20000; ++i)
+            j(3, h);
+    }
+    public static void main(String[] o) {
+        try {
+            LoopRotateBadNodeBudget n = new LoopRotateBadNodeBudget();
+            n.f(o);
+        } catch (Exception ex) {
+        }
+    }
+}