| /* |
| * Copyright (c) 2019, 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 8223502 |
| * @summary Node estimate for loop unswitching is not correct: |
| * assert(delta <= 2 * required) failed: Bad node estimate |
| * |
| * @requires !vm.graal.enabled |
| * |
| * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation |
| * -XX:-UseOnStackReplacement -XX:CompileOnly=LoopUnswitchingBadNodeBudget::test |
| * -XX:CompileCommand=dontinline,LoopUnswitchingBadNodeBudget::helper |
| * -XX:+UnlockDiagnosticVMOptions -XX:-UseSwitchProfiling LoopUnswitchingBadNodeBudget |
| * |
| */ |
| |
| public class LoopUnswitchingBadNodeBudget { |
| |
| public static void main(String[] args) { |
| for (int i = 0; i < 20_000; i++) { |
| for (int j = 0; j < 100; j++) { |
| test(j, true, 0, 0, 0); |
| test(j, false, 0, 0, 0); |
| } |
| } |
| } |
| |
| private static int test(int j, boolean flag, int k, int l, int m) { |
| int res = 0; |
| for (int i = 0; i < 24; i++) { |
| if (flag) { |
| k = k / 2; |
| l = l * 2; |
| m = m + 2; |
| } |
| switch (j) { |
| case 0: break; |
| case 1: return helper(j, k, l, m); |
| case 2: return helper(j, k, l, m); |
| case 3: return helper(j, k, l, m); |
| case 4: return helper(j, k, l, m); |
| case 5: return helper(j, k, l, m); |
| case 6: return helper(j, k, l, m); |
| case 7: return helper(j, k, l, m); |
| case 8: return helper(j, k, l, m); |
| case 9: return helper(j, k, l, m); |
| case 10: return helper(j, k, l, m); |
| case 11: return helper(j, k, l, m); |
| case 12: return helper(j, k, l, m); |
| case 13: return helper(j, k, l, m); |
| case 14: return helper(j, k, l, m); |
| case 15: return helper(j, k, l, m); |
| case 16: return helper(j, k, l, m); |
| case 17: return helper(j, k, l, m); |
| case 18: return helper(j, k, l, m); |
| case 19: return helper(j, k, l, m); |
| case 20: return helper(j, k, l, m); |
| case 21: return helper(j, k, l, m); |
| case 22: return helper(j, k, l, m); |
| case 23: return helper(j, k, l, m); |
| case 24: return helper(j, k, l, m); |
| case 25: return helper(j, k, l, m); |
| case 26: return helper(j, k, l, m); |
| case 27: return helper(j, k, l, m); |
| case 28: return helper(j, k, l, m); |
| case 29: return helper(j, k, l, m); |
| case 30: return helper(j, k, l, m); |
| case 31: return helper(j, k, l, m); |
| case 32: return helper(j, k, l, m); |
| case 33: return helper(j, k, l, m); |
| case 34: return helper(j, k, l, m); |
| case 35: return helper(j, k, l, m); |
| case 36: return helper(j, k, l, m); |
| case 37: return helper(j, k, l, m); |
| case 38: return helper(j, k, l, m); |
| case 39: return helper(j, k, l, m); |
| case 40: return helper(j, k, l, m); |
| case 41: return helper(j, k, l, m); |
| case 42: return helper(j, k, l, m); |
| case 43: return helper(j, k, l, m); |
| case 44: return helper(j, k, l, m); |
| case 45: return helper(j, k, l, m); |
| case 46: return helper(j, k, l, m); |
| case 47: return helper(j, k, l, m); |
| case 48: return helper(j, k, l, m); |
| case 49: return helper(j, k, l, m); |
| case 50: return helper(j, k, l, m); |
| case 51: return helper(j, k, l, m); |
| case 52: return helper(j, k, l, m); |
| case 53: return helper(j, k, l, m); |
| case 54: return helper(j, k, l, m); |
| case 55: return helper(j, k, l, m); |
| case 56: return helper(j, k, l, m); |
| case 57: return helper(j, k, l, m); |
| case 58: return helper(j, k, l, m); |
| case 59: return helper(j, k, l, m); |
| case 60: return helper(j, k, l, m); |
| case 61: return helper(j, k, l, m); |
| case 62: return helper(j, k, l, m); |
| case 63: return helper(j, k, l, m); |
| case 64: return helper(j, k, l, m); |
| case 65: return helper(j, k, l, m); |
| case 66: return helper(j, k, l, m); |
| case 67: return helper(j, k, l, m); |
| case 68: return helper(j, k, l, m); |
| case 69: return helper(j, k, l, m); |
| case 70: return helper(j, k, l, m); |
| case 71: return helper(j, k, l, m); |
| case 72: return helper(j, k, l, m); |
| case 73: return helper(j, k, l, m); |
| case 74: return helper(j, k, l, m); |
| case 75: return helper(j, k, l, m); |
| case 76: return helper(j, k, l, m); |
| case 77: return helper(j, k, l, m); |
| case 78: return helper(j, k, l, m); |
| case 79: return helper(j, k, l, m); |
| case 80: return helper(j, k, l, m); |
| case 81: return helper(j, k, l, m); |
| case 82: return helper(j, k, l, m); |
| case 83: return helper(j, k, l, m); |
| case 84: return helper(j, k, l, m); |
| case 85: return helper(j, k, l, m); |
| case 86: return helper(j, k, l, m); |
| case 87: return helper(j, k, l, m); |
| case 88: return helper(j, k, l, m); |
| case 89: return helper(j, k, l, m); |
| case 90: return helper(j, k, l, m); |
| case 91: return helper(j, k, l, m); |
| case 92: return helper(j, k, l, m); |
| case 93: return helper(j, k, l, m); |
| case 94: return helper(j, k, l, m); |
| case 95: return helper(j, k, l, m); |
| case 96: return helper(j, k, l, m); |
| case 97: return helper(j, k, l, m); |
| case 98: return helper(j, k, l, m); |
| case 99: return helper(j, k, l, m); |
| } |
| res += helper(j, k, l, m); |
| } |
| return res; |
| } |
| |
| private static int helper(int j, int k, int l, int m) { |
| return j + k; |
| } |
| } |
