| /* |
| * Copyright (c) 2015, 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 8134031 |
| * @summary Bad rewiring of memory edges when we split unique types during EA |
| * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:CompileCommand=dontinline,TestEABadMergeMem::m_notinlined TestEABadMergeMem |
| * |
| */ |
| |
| public class TestEABadMergeMem { |
| |
| static class Box { |
| int i; |
| } |
| |
| static void m_notinlined() { |
| } |
| |
| static float dummy1; |
| static float dummy2; |
| |
| static int test(Box a, Box c, int i, int j, int k, boolean flag1, boolean flag2) { |
| Box b = new Box(); // non escaping |
| a.i = i; |
| b.i = j; |
| c.i = k; |
| |
| m_notinlined(); |
| |
| boolean flag3 = false; |
| if (flag1) { |
| for (int ii = 0; ii < 100; ii++) { |
| if (flag2) { |
| dummy1 = (float)ii; |
| } else { |
| dummy2 = (float)ii; |
| } |
| } |
| flag3 = true; |
| } |
| // Memory Phi here with projection of not inlined call as one edge, MergeMem as other |
| |
| if (flag3) { // will split through Phi during loopopts |
| int res = c.i + b.i; |
| m_notinlined(); // prevents split through phi during igvn |
| return res; |
| } else { |
| return 44 + 43; |
| } |
| } |
| |
| static public void main(String[] args) { |
| for (int i = 0; i < 20000; i++) { |
| // m(2); |
| Box a = new Box(); |
| Box c = new Box(); |
| int res = test(a, c, 42, 43, 44, (i%2) == 0, (i%3) == 0); |
| if (res != 44 + 43) { |
| throw new RuntimeException("Bad result " + res); |
| } |
| } |
| } |
| |
| } |
