1 /* 2 * Copyright (c) 2014, 2018, 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.nodes.type; 26 27 import org.graalvm.compiler.core.common.CompressEncoding; 28 import org.graalvm.compiler.core.common.LIRKind; 29 import org.graalvm.compiler.core.common.spi.LIRKindTool; 30 import org.graalvm.compiler.core.common.type.AbstractObjectStamp; 31 import org.graalvm.compiler.core.common.type.ObjectStamp; 32 import org.graalvm.compiler.core.common.type.Stamp; 33 34 import jdk.vm.ci.meta.Constant; 35 import jdk.vm.ci.meta.MemoryAccessProvider; 36 import jdk.vm.ci.meta.ResolvedJavaType; 37 38 public abstract class NarrowOopStamp extends AbstractObjectStamp { 39 40 private final CompressEncoding encoding; 41 42 protected NarrowOopStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull, CompressEncoding encoding) { 43 super(type, exactType, nonNull, alwaysNull); 44 this.encoding = encoding; 45 } 46 47 @Override 48 protected abstract AbstractObjectStamp copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull); 49 50 public Stamp uncompressed() { 51 return new ObjectStamp(type(), isExactType(), nonNull(), alwaysNull()); 52 } 53 54 public CompressEncoding getEncoding() { 55 return encoding; 56 } 57 58 @Override 59 public LIRKind getLIRKind(LIRKindTool tool) { 60 return tool.getNarrowOopKind(); 61 } 62 63 @Override 64 public String toString() { 65 StringBuilder str = new StringBuilder(); 66 str.append('n'); 67 appendString(str); 68 return str.toString(); 69 } 70 71 @Override 72 public boolean isCompatible(Stamp other) { 73 if (this == other) { 74 return true; 75 } 76 if (other instanceof NarrowOopStamp) { 77 NarrowOopStamp narrow = (NarrowOopStamp) other; 78 return encoding.equals(narrow.encoding); 79 } 80 return false; 81 } 82 83 @Override 84 public abstract Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement); 85 86 @Override 87 public int hashCode() { 88 final int prime = 31; 89 int result = super.hashCode(); 90 result = prime * result + encoding.hashCode(); 91 return result; 92 } 93 94 @Override 95 public boolean equals(Object obj) { 96 if (this == obj) { 97 return true; 98 } 99 if (obj == null || getClass() != obj.getClass()) { 100 return false; 101 } 102 NarrowOopStamp other = (NarrowOopStamp) obj; 103 if (!encoding.equals(other.encoding)) { 104 return false; 105 } 106 return super.equals(other); 107 } 108 109 @Override 110 public abstract boolean isCompatible(Constant other); 111 }