package org.graalvm.compiler.nodes.type;
import org.graalvm.compiler.core.common.CompressEncoding;
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 jdk.vm.ci.meta.Constant;
import jdk.vm.ci.meta.JavaConstant;
import jdk.vm.ci.meta.MemoryAccessProvider;
import jdk.vm.ci.meta.ResolvedJavaType;
public abstract class NarrowOopStamp extends AbstractObjectStamp {
private final CompressEncoding encoding;
protected NarrowOopStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull, CompressEncoding encoding) {
super(type, exactType, nonNull, alwaysNull);
this.encoding = encoding;
}
@Override
protected abstract AbstractObjectStamp copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull);
public Stamp uncompressed() {
return new ObjectStamp(type(), isExactType(), nonNull(), alwaysNull());
}
public CompressEncoding getEncoding() {
return encoding;
}
@Override
public LIRKind getLIRKind(LIRKindTool tool) {
return 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 abstract Constant readConstant(MemoryAccessProvider provider, Constant base, long 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 abstract JavaConstant asConstant();
@Override
public abstract boolean isCompatible(Constant other);
}