| /* |
| * Copyright (c) 2021, 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 8261812 |
| * @summary C2 compilation fails with assert(!had_error) failed: bad dominance |
| * |
| * @run main/othervm -XX:-BackgroundCompilation TestValAtSafepointOverflowsInt |
| * |
| */ |
| |
| public class TestValAtSafepointOverflowsInt { |
| private static volatile int volatileField; |
| |
| public static void main(String[] args) { |
| for (int i = 0; i < 20_000; i++) { |
| testByte(true, false); |
| testByte(false, false); |
| testShort(true, false); |
| testShort(false, false); |
| testChar(true, false); |
| testChar(false, false); |
| } |
| testByte(true, true); |
| testShort(true, true); |
| testChar(true, true); |
| } |
| |
| private static Object testByte(boolean flag, boolean flag2) { |
| int i; |
| // loop to delay constant folding |
| for (i = 0; i < 9; i++) { |
| } |
| C obj = new C(); |
| if (flag) { |
| obj.byteField = (byte)(1 << i); |
| } else { |
| obj.byteField = (byte)(1 << (i+1)); |
| } |
| // Phi for byte here for uncommon trap in never taken path below |
| // Phi inputs don't fit in a byte. Phi transfomed to top. |
| if (flag2) { |
| return obj; |
| } |
| return null; |
| } |
| |
| private static Object testShort(boolean flag, boolean flag2) { |
| int i; |
| for (i = 0; i < 17; i++) { |
| } |
| C obj = new C(); |
| if (flag) { |
| obj.shortField = (short)(1 << i); |
| } else { |
| obj.shortField = (short)(1 << (i+1)); |
| } |
| if (flag2) { |
| return obj; |
| } |
| return null; |
| } |
| |
| private static Object testChar(boolean flag, boolean flag2) { |
| int i; |
| for (i = 0; i < 17; i++) { |
| } |
| C obj = new C(); |
| if (flag) { |
| obj.charField = (char)(1 << i); |
| } else { |
| obj.charField = (char)(1 << (i+1)); |
| } |
| if (flag2) { |
| return obj; |
| } |
| return null; |
| } |
| |
| |
| static class C { |
| byte byteField; |
| short shortField; |
| char charField; |
| } |
| |
| } |