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 package org.graalvm.compiler.core.common.type; 24 25 /** 26 * A pair of stamp with one being the stamp that can be trusted and the other one being a guess that 27 * needs a dynamic check to be used. 28 */ 29 public final class StampPair { 30 31 private final Stamp trustedStamp; 32 private final Stamp uncheckedStamp; 33 34 private StampPair(Stamp trustedStamp, Stamp uncheckedStamp) { 35 assert trustedStamp != null; 36 this.trustedStamp = trustedStamp; 37 this.uncheckedStamp = uncheckedStamp; 38 } 39 40 public static StampPair create(Stamp trustedStamp, Stamp uncheckedStamp) { 41 return new StampPair(trustedStamp, uncheckedStamp); 42 } 43 44 public static StampPair createSingle(Stamp stamp) { 45 return new StampPair(stamp, null); 46 } 47 48 public Stamp getUncheckedStamp() { 49 return uncheckedStamp; 50 } 51 52 public Stamp getTrustedStamp() { 53 return trustedStamp; 54 } 55 56 @Override 57 public String toString() { 58 if (uncheckedStamp == null) { 59 return trustedStamp.toString(); 60 } else { 61 return trustedStamp + " (unchecked=" + uncheckedStamp + ")"; 62 } 63 } 64 }