| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package org.graalvm.compiler.hotspot.nodes.type; |
| |
| import org.graalvm.compiler.core.common.LIRKind; |
| import org.graalvm.compiler.core.common.spi.LIRKindTool; |
| import org.graalvm.compiler.core.common.type.AbstractObjectStamp; |
| import org.graalvm.compiler.core.common.type.ObjectStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| import org.graalvm.compiler.hotspot.CompressEncoding; |
| |
| import jdk.vm.ci.hotspot.HotSpotCompressedNullConstant; |
| import jdk.vm.ci.hotspot.HotSpotMemoryAccessProvider; |
| import jdk.vm.ci.hotspot.HotSpotObjectConstant; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.MemoryAccessProvider; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| public class NarrowOopStamp extends AbstractObjectStamp { |
| |
| private final CompressEncoding encoding; |
| |
| public NarrowOopStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull, CompressEncoding encoding) { |
| super(type, exactType, nonNull, alwaysNull); |
| this.encoding = encoding; |
| } |
| |
| @Override |
| protected AbstractObjectStamp copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) { |
| return new NarrowOopStamp(type, exactType, nonNull, alwaysNull, encoding); |
| } |
| |
| public static Stamp compressed(AbstractObjectStamp stamp, CompressEncoding encoding) { |
| return new NarrowOopStamp(stamp.type(), stamp.isExactType(), stamp.nonNull(), stamp.alwaysNull(), encoding); |
| } |
| |
| public Stamp uncompressed() { |
| return new ObjectStamp(type(), isExactType(), nonNull(), alwaysNull()); |
| } |
| |
| public CompressEncoding getEncoding() { |
| return encoding; |
| } |
| |
| @Override |
| public LIRKind getLIRKind(LIRKindTool tool) { |
| return ((HotSpotLIRKindTool) tool).getNarrowOopKind(); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder str = new StringBuilder(); |
| str.append('n'); |
| appendString(str); |
| return str.toString(); |
| } |
| |
| @Override |
| public boolean isCompatible(Stamp other) { |
| if (this == other) { |
| return true; |
| } |
| if (other instanceof NarrowOopStamp) { |
| NarrowOopStamp narrow = (NarrowOopStamp) other; |
| return encoding.equals(narrow.encoding); |
| } |
| return false; |
| } |
| |
| @Override |
| public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) { |
| HotSpotMemoryAccessProvider hsProvider = (HotSpotMemoryAccessProvider) provider; |
| return hsProvider.readNarrowOopConstant(base, displacement); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = super.hashCode(); |
| result = prime * result + encoding.hashCode(); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null || getClass() != obj.getClass()) { |
| return false; |
| } |
| NarrowOopStamp other = (NarrowOopStamp) obj; |
| if (!encoding.equals(other.encoding)) { |
| return false; |
| } |
| return super.equals(other); |
| } |
| |
| @Override |
| public JavaConstant asConstant() { |
| if (alwaysNull()) { |
| return HotSpotCompressedNullConstant.COMPRESSED_NULL; |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public boolean isCompatible(Constant other) { |
| if (other instanceof HotSpotObjectConstant) { |
| return ((HotSpotObjectConstant) other).isCompressed(); |
| } |
| return true; |
| } |
| } |