1 /* 2 * Copyright (c) 2016, 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 25 package org.graalvm.compiler.core.common.type; 26 27 /** 28 * A pair of stamp with one being the stamp that can be trusted and the other one being a guess that 29 * needs a dynamic check to be used. 30 */ 31 public final class StampPair { 32 33 private final Stamp trustedStamp; 34 private final Stamp uncheckedStamp; 35 36 private StampPair(Stamp trustedStamp, Stamp uncheckedStamp) { 37 assert trustedStamp != null; 38 this.trustedStamp = trustedStamp; 39 this.uncheckedStamp = uncheckedStamp; 40 } 41 42 public static StampPair create(Stamp trustedStamp, Stamp uncheckedStamp) { 43 return new StampPair(trustedStamp, uncheckedStamp); 44 } 45 46 public static StampPair createSingle(Stamp stamp) { 47 return new StampPair(stamp, null); 48 } 49 50 public Stamp getUncheckedStamp() { 51 return uncheckedStamp; 52 } 53 54 public Stamp getTrustedStamp() { 55 return trustedStamp; 56 } 57 58 @Override 59 public String toString() { 60 if (uncheckedStamp == null) { 61 return trustedStamp.toString(); 62 } else { 63 return trustedStamp + " (unchecked=" + uncheckedStamp + ")"; 64 } 65 } 66 }