1 /* 2 * Copyright (c) 2012, 2014, 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 import org.graalvm.compiler.core.common.LIRKind; 26 import org.graalvm.compiler.core.common.spi.LIRKindTool; 27 28 import jdk.vm.ci.meta.Constant; 29 import jdk.vm.ci.meta.JavaConstant; 30 import jdk.vm.ci.meta.MemoryAccessProvider; 31 import jdk.vm.ci.meta.ResolvedJavaType; 32 33 public class ObjectStamp extends AbstractObjectStamp { 34 35 public ObjectStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) { 36 super(type, exactType, nonNull, alwaysNull); 37 } 38 39 @Override 40 protected ObjectStamp copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) { 41 return new ObjectStamp(type, exactType, nonNull, alwaysNull); 42 } 43 44 @Override 45 public Stamp unrestricted() { 46 return StampFactory.object(); 47 } 48 49 @Override 50 public String toString() { 51 StringBuilder str = new StringBuilder(); 52 str.append('a'); 53 appendString(str); 54 return str.toString(); 55 } 56 57 @Override 58 public boolean isCompatible(Stamp other) { 59 if (this == other) { 60 return true; 61 } 62 if (other instanceof ObjectStamp) { 63 return true; 64 } 65 return false; 66 } 67 68 @Override 69 public boolean isCompatible(Constant constant) { 70 if (constant instanceof JavaConstant) { 71 return ((JavaConstant) constant).getJavaKind().isObject(); 72 } 73 return false; 74 } 75 76 @Override 77 public LIRKind getLIRKind(LIRKindTool tool) { 78 return tool.getObjectKind(); 79 } 80 81 @Override 82 public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) { 83 return provider.readObjectConstant(base, displacement); 84 } 85 }