1 /* 2 * Copyright (c) 2014, 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 package org.graalvm.compiler.hotspot.nodes.type; 24 25 import org.graalvm.compiler.core.common.LIRKind; 26 import org.graalvm.compiler.core.common.spi.LIRKindTool; 27 import org.graalvm.compiler.core.common.type.AbstractPointerStamp; 28 import org.graalvm.compiler.core.common.type.Stamp; 29 import org.graalvm.compiler.debug.GraalError; 30 31 import jdk.vm.ci.meta.Constant; 32 import jdk.vm.ci.meta.MetaAccessProvider; 33 import jdk.vm.ci.meta.ResolvedJavaType; 34 35 public abstract class MetaspacePointerStamp extends AbstractPointerStamp { 36 37 protected MetaspacePointerStamp(boolean nonNull, boolean alwaysNull) { 38 super(nonNull, alwaysNull); 39 } 40 41 @Override 42 public LIRKind getLIRKind(LIRKindTool tool) { 43 return tool.getWordKind(); 44 } 45 46 @Override 47 public Stamp empty() { 48 // there is no empty pointer stamp 49 return this; 50 } 51 52 @Override 53 public boolean isCompatible(Constant constant) { 54 return constant.isDefaultForKind(); 55 } 56 57 @Override 58 public boolean hasValues() { 59 return true; 60 } 61 62 @Override 63 public ResolvedJavaType javaType(MetaAccessProvider metaAccess) { 64 throw GraalError.shouldNotReachHere("metaspace pointer has no Java type"); 65 } 66 67 protected void appendString(StringBuilder str) { 68 str.append(nonNull() ? "!" : "").append(alwaysNull() ? " NULL" : ""); 69 } 70 71 }