--- /dev/null	2020-08-18 16:48:16.793413330 +0200
+++ new/test/hotspot/jtreg/compiler/loopopts/TestSplitIfPinnedLoadInStripMinedLoop.java	2020-08-25 09:08:13.816418977 +0200
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2020, 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 8249607
+ * @summary A LoadNode is pinned in split_if_with_blocks_post() on a loop exit node x that is part of a strip mined loop. It has a late control y outside
+            the outer strip mined loop. After pre-main-post, the dominator chain of y does not include x anymore resulting in an assertion failure.
+ * @run main/othervm -Xbatch -XX:CompileCommand=compileonly,compiler.loopopts.TestSplitIfPinnedLoadInStripMinedLoop::*
+ *                   compiler.loopopts.TestSplitIfPinnedLoadInStripMinedLoop
+ */
+package compiler.loopopts;
+
+public class TestSplitIfPinnedLoadInStripMinedLoop {
+
+    public boolean bFld = false;
+    public short sFld = 4;
+    public static int iFld = 5;
+    public static float fFld= 6.0f;
+    public static int iArrFld[] = new int[400];
+
+    public void test() {
+        int x = 7;
+        int y = 8;
+        int a = 9;
+        float f = 10.0f;
+        double d = 11.0f;
+        double dArr[] = new double[400];
+
+        for (int i = 16; i < 350; i++) {
+            for (int j = 1; j < 75; j++) {
+                for (int k = 1; k < 3; k++) {
+                }
+                f = j * 6;
+                y = j;
+                try {
+                    x = (y / 148);
+                } catch (ArithmeticException a_e) {}
+                if (bFld) {
+                    break;
+                }
+                dArr[1] = 4;
+            }
+            for (int k = 75; k > i; k--) {
+                iArrFld[k] = 5;
+            }
+            for (int k = 4; k < 75; k++) {
+                f -= fFld;
+                // The LoadSNode for sFld is cloned in split_if_with_blocks_post() for each use such that they can float out of the loop. All control
+                // inputs of the clone are set to the latest control of the original LoadSNode which in this case is the StoreSNode for iFld that is
+                // aninput to a MergeMemNode which is an input to the SafePointNode in the outer strip mined loop. Both these nodes are not part
+                // of the loop body and thus the StoreNode is also not part of the loop anymore. This means that all the new LoadNode clones get
+                // the loop exit l inside the outer strip mined loop as control input. Some of these clones (**) have a late control outside of
+                // this outer strip mined loop. The dominator chain from the controls nodes of (**) contain l. However, after pre-main-post, we
+                // insert additional Region nodes but do not account for these control inputs of the LoadSNodes. They remain unchanged and still
+                // have l as control input. As a consequence, we do not find l on the dominator chains from the control nodes of (**) anymore
+                // resulting in a dominator assertion failure.
+                iFld = sFld;
+            }
+            switch ((i % 8) + 27) {
+            case 27:
+                if (bFld) {
+                    for (a = 1; a < 75; a++) {
+                        iFld += 6; // (**)
+                    }
+                } else {
+                    d -= x;
+                }
+                break;
+            case 28:
+                iFld = y;
+                // Fall through
+            case 33:
+            case 34:
+                iFld -= (int)d; // (**)
+                break;
+            }
+        }
+    }
+    public static void main(String[] strArr) {
+        TestSplitIfPinnedLoadInStripMinedLoop t = new TestSplitIfPinnedLoadInStripMinedLoop();
+        for (int i = 0; i < 10; i++) {
+            t.test();
+        }
+    }
+}