8175097: [TESTBUG] 8174164 fix missed the test

Reviewed-by: kvn

test/compiler/c2/TestReplacedNodesOSR.java

+/*
+ * Copyright (c) 2017, 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 8174164
+ * @summary SafePointNode::_replaced_nodes breaks with irreducible loops
+ * @run main/othervm -XX:-BackgroundCompilation TestReplacedNodesOSR
+ *
+ */
+
+public class TestReplacedNodesOSR {
+
+    static Object dummy;
+
+    static interface I {
+    }
+
+    static class A implements I {
+    }
+
+    static final class MyException extends Exception {
+    }
+
+    static final A obj = new A();
+    static I static_field() { return obj; }
+
+    // When OSR compiled, this method has an irreducible loop
+    static void test(int v, MyException e) {
+        int i = 0;
+        for (;;) {
+            if (i == 1000) {
+                break;
+            }
+            try {
+                if ((i%2) == 0) {
+                    int j = 0;
+                    for (;;) {
+                        j++;
+                        if (i+j != v) {
+                            if (j == 1000) {
+                                break;
+                            }
+                        } else {
+                            A a = (A)static_field();
+                            // replaced node recorded here
+                            throw e;
+                        }
+                    }
+                }
+            } catch(MyException ex) {
+            }
+            i++;
+            // replaced node applied on return of the method
+            // replaced node used here
+            dummy = static_field();
+        }
+    }
+
+
+    static public void main(String[] args) {
+        for (int i = 0; i < 1000; i++) {
+            test(1100, new MyException());
+        }
+    }
+}