1 /* 2 * Copyright (c) 2009, 2015, 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 /** 25 * @test 26 * @bug 6805724 27 * @summary ModLNode::Ideal() generates functionally incorrect graph 28 * when divisor is any (2^k-1) constant. 29 * @modules java.base/jdk.internal.misc 30 * @library /test/lib 31 * 32 * @run main/othervm -Xcomp 33 * -XX:CompileCommand=compileonly,compiler.c2.Test6805724::fcomp 34 * compiler.c2.Test6805724 35 */ 36 37 package compiler.c2; 38 39 import jdk.test.lib.Utils; 40 41 public class Test6805724 implements Runnable { 42 // Initialize DIVISOR so that it is final in this class. 43 static final long DIVISOR; // 2^k-1 constant 44 45 static { 46 long value = 0; 47 try { 48 value = Long.decode(System.getProperty("divisor")); 49 } catch (Throwable t) { 50 // This one is required for the Class.forName() in main. 51 } 52 DIVISOR = value; 53 } 54 55 static long fint(long x) { 56 return x % DIVISOR; 57 } 58 59 static long fcomp(long x) { 60 return x % DIVISOR; 61 } 62 63 public void run() { 64 long a = 0x617981E1L; 65 66 long expected = fint(a); 67 long result = fcomp(a); 68 69 if (result != expected) 70 throw new InternalError(result + " != " + expected); 71 } 72 73 public static void main(String args[]) throws Exception { 74 Class cl = Test6805724.class; 75 ClassLoader apploader = cl.getClassLoader(); 76 77 // Iterate over all 2^k-1 divisors. 78 for (int k = 1; k < Long.SIZE; k++) { 79 long divisor = (1L << k) - 1; 80 System.setProperty("divisor", "" + divisor); 81 ClassLoader loader 82 = Utils.getTestClassPathURLClassLoader(apploader.getParent()); 83 Class c = loader.loadClass(Test6805724.class.getName()); 84 Runnable r = (Runnable) c.newInstance(); 85 r.run(); 86 } 87 } 88 }