8015585: Missing regression test for 8011771
Summary: missing regression test
Reviewed-by: kvn
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/8011771/Test8011771.java Thu May 30 11:21:01 2013 +0200
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2013, 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 8011771
+ * @summary Array bound check elimination's in block motion doesn't always reset its data structures from one step to the other.
+ * @run main/othervm -XX:-BackgroundCompilation Test8011771
+ *
+ */
+
+public class Test8011771 {
+
+ static void m(int[] a, int[] b, int j) {
+ // Array bound check elimination inserts a predicate before
+ // the loop. We'll have the predicate fail, so the method is
+ // recompiled without optimistic optimizations
+ for (int i = 0; i < 10; i++) {
+ a[i] = i;
+ }
+
+ // The test itself
+ a[j] = 0;
+ a[j+5] = 0;
+ b[j+4] = 0; // this range check shouldn't be eliminated
+ }
+
+ static public void main(String[] args) {
+ int[] arr1 = new int[10], arr2 = new int[10];
+ // force compilation:
+ for (int i = 0; i < 5000; i++) {
+ m(arr1, arr2, 0);
+ }
+
+ try {
+ m(new int[1], null, 0); // force predicate failure
+ } catch(ArrayIndexOutOfBoundsException e) {}
+
+ // force compilation again (no optimistic opts):
+ for (int i = 0; i < 5000; i++) {
+ m(arr1, arr2, 0);
+ }
+
+ // Check that the range check on the second array wasn't optimized out
+ boolean success = false;
+ try {
+ m(arr1, new int[1], 0);
+ } catch(ArrayIndexOutOfBoundsException e) {
+ success = true;
+ }
+ if (success) {
+ System.out.println("TEST PASSED");
+ } else {
+ throw new RuntimeException("TEST FAILED: erroneous bound check elimination");
+ }
+ }
+}