001/* 002 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 004 * 005 * This code is free software; you can redistribute it and/or modify it 006 * under the terms of the GNU General Public License version 2 only, as 007 * published by the Free Software Foundation. 008 * 009 * This code is distributed in the hope that it will be useful, but WITHOUT 010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 011 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 012 * version 2 for more details (a copy is included in the LICENSE file that 013 * accompanied this code). 014 * 015 * You should have received a copy of the GNU General Public License version 016 * 2 along with this work; if not, write to the Free Software Foundation, 017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 018 * 019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 020 * or visit www.oracle.com if you need additional information or have any 021 * questions. 022 */ 023package com.oracle.graal.hotspot.nodes.type; 024 025import jdk.internal.jvmci.common.*; 026import jdk.internal.jvmci.meta.*; 027 028import com.oracle.graal.compiler.common.spi.*; 029import com.oracle.graal.compiler.common.type.*; 030 031public abstract class MetaspacePointerStamp extends AbstractPointerStamp { 032 033 protected MetaspacePointerStamp(boolean nonNull, boolean alwaysNull) { 034 super(nonNull, alwaysNull); 035 } 036 037 @Override 038 public LIRKind getLIRKind(LIRKindTool tool) { 039 return tool.getWordKind(); 040 } 041 042 @Override 043 public Stamp empty() { 044 // there is no empty pointer stamp 045 return this; 046 } 047 048 @Override 049 public boolean hasValues() { 050 return true; 051 } 052 053 @Override 054 public ResolvedJavaType javaType(MetaAccessProvider metaAccess) { 055 throw JVMCIError.shouldNotReachHere("metaspace pointer has no Java type"); 056 } 057 058 protected void appendString(StringBuilder str) { 059 str.append(nonNull() ? "!" : "").append(alwaysNull() ? " NULL" : ""); 060 } 061 062}