| /* |
| * Copyright (c) 2019, 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 8229483 |
| * @summary Sinking load out of loop may trigger: assert(found_sfpt) failed: no node in loop that's not input to safepoint |
| * |
| * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:LoopMaxUnroll=0 AntiDependentLoadInOuterStripMinedLoop |
| * |
| */ |
| |
| public class AntiDependentLoadInOuterStripMinedLoop { |
| private static int field; |
| private static volatile int barrier; |
| |
| public static void main(String[] args) { |
| int[] array = new int[1]; |
| A a = new A(); |
| for (int i = 0; i < 20_000; i++) { |
| test1(array); |
| test2(a, array); |
| test2_helper(array, 0, 0); |
| } |
| } |
| |
| private static int test1(int[] array) { |
| int res = 1; |
| |
| for (int i = 0; i < 10; i++) { |
| barrier = 1; |
| // field load doesn't float higher than here |
| |
| for (int j = 0; j < 2000; j++) { |
| array[0] = j; // seen as anti dependence by C2 during loop opts, sunk out of loop |
| res *= j; |
| } |
| } |
| |
| return field + res + field * 2; |
| } |
| |
| private static int test2(A a, int[] array) { |
| int ignore = a.field; |
| int res = 1; |
| |
| int k = 0; |
| for (k = 0; k < 2; k++) { |
| } |
| |
| for (int i = 0; i < 10; i++) { |
| barrier = 1; |
| |
| for (int j = 0; j < 2000; j++) { |
| test2_helper(array, k, j); |
| res *= j; |
| } |
| } |
| |
| return a.field + res + a.field * 2; |
| } |
| |
| private static void test2_helper(int[] array, int k, int j) { |
| if (k == 2) { |
| array[0] = j; |
| } |
| } |
| |
| private static class A { |
| public int field; |
| } |
| } |