aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 8011771
aoqi@0:  * @summary Array bound check elimination's in block motion doesn't always reset its data structures from one step to the other.
aoqi@0:  * @run main/othervm -XX:-BackgroundCompilation Test8011771
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: public class Test8011771 {
aoqi@0: 
aoqi@0:     static void m(int[] a, int[] b, int j) {
aoqi@0:         // Array bound check elimination inserts a predicate before
aoqi@0:         // the loop. We'll have the predicate fail, so the method is
aoqi@0:         // recompiled without optimistic optimizations
aoqi@0:         for (int i = 0; i < 10; i++) {
aoqi@0:             a[i] = i;
aoqi@0:         }
aoqi@0: 
aoqi@0:         // The test itself
aoqi@0:         a[j] = 0;
aoqi@0:         a[j+5] = 0;
aoqi@0:         b[j+4] = 0; // this range check shouldn't be eliminated
aoqi@0:     }
aoqi@0: 
aoqi@0:     static public void main(String[] args) {
aoqi@0:         int[] arr1 = new int[10], arr2 = new int[10];
aoqi@0:         // force compilation:
aoqi@0:         for (int i = 0; i < 5000; i++) {
aoqi@0:             m(arr1, arr2, 0);
aoqi@0:         }
aoqi@0: 
aoqi@0:         try {
aoqi@0:             m(new int[1], null, 0); // force predicate failure
aoqi@0:         } catch(ArrayIndexOutOfBoundsException e) {}
aoqi@0: 
aoqi@0:         // force compilation again (no optimistic opts):
aoqi@0:         for (int i = 0; i < 5000; i++) {
aoqi@0:             m(arr1, arr2, 0);
aoqi@0:         }
aoqi@0: 
aoqi@0:         // Check that the range check  on the second array wasn't optimized out
aoqi@0:         boolean success = false;
aoqi@0:         try {
aoqi@0:             m(arr1, new int[1], 0);
aoqi@0:         } catch(ArrayIndexOutOfBoundsException e) {
aoqi@0:             success = true;
aoqi@0:         }
aoqi@0:         if (success) {
aoqi@0:             System.out.println("TEST PASSED");
aoqi@0:         } else {
aoqi@0:             throw new RuntimeException("TEST FAILED: erroneous bound check elimination");
aoqi@0:         }
aoqi@0:     }
aoqi@0: }