1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 package compiler.loopopts; 25 26 import java.lang.reflect.Method; 27 import sun.hotspot.WhiteBox; 28 import jdk.test.lib.Asserts; 29 import compiler.whitebox.CompilerWhiteBoxTest; 30 31 public class UseCountedLoopSafepoints { 32 private static final WhiteBox WB = WhiteBox.getWhiteBox(); 33 private static final String METHOD_NAME = "testMethod"; 34 35 private long accum = 0; 36 main(String args[])37 public static void main (String args[]) throws Exception { 38 new UseCountedLoopSafepoints().testMethod(); 39 Method m = UseCountedLoopSafepoints.class.getDeclaredMethod(METHOD_NAME); 40 String directive = "[{ match: \"" + UseCountedLoopSafepoints.class.getName().replace('.', '/') 41 + "." + METHOD_NAME + "\", " + "BackgroundCompilation: false }]"; 42 Asserts.assertTrue(WB.addCompilerDirective(directive) == 1, "Can't add compiler directive"); 43 Asserts.assertTrue(WB.enqueueMethodForCompilation(m, 44 CompilerWhiteBoxTest.COMP_LEVEL_FULL_OPTIMIZATION), "Can't enqueue method"); 45 } 46 testMethod()47 private void testMethod() { 48 for (int i = 0; i < 100; i++) { 49 accum += accum << 5 + accum >> 4 - accum >>> 5; 50 } 51 } 52 } 53