/*
* Copyright (c) 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 jdk.vm.ci.meta;
Represents the type of values
. This class can be extended by compilers to track additional information about values. /**
* Represents the type of {@link Value values}. This class can be extended by compilers to track
* additional information about values.
*/
public abstract class ValueKind<K extends ValueKind<K>> {
private enum IllegalKind implements PlatformKind {
ILLEGAL;
private final EnumKey<IllegalKind> key = new EnumKey<>(this);
@Override
public Key getKey() {
return key;
}
@Override
public int getSizeInBytes() {
return 0;
}
@Override
public int getVectorLength() {
return 0;
}
@Override
public char getTypeChar() {
return '-';
}
}
private static class IllegalValueKind extends ValueKind<IllegalValueKind> {
IllegalValueKind() {
super(IllegalKind.ILLEGAL);
}
@Override
public IllegalValueKind changeType(PlatformKind newPlatformKind) {
return this;
}
@Override
public String toString() {
return "ILLEGAL";
}
}
The non-type.
/**
* The non-type.
*/
public static final ValueKind<?> Illegal = new IllegalValueKind();
private final PlatformKind platformKind;
public ValueKind(PlatformKind platformKind) {
this.platformKind = platformKind;
}
public final PlatformKind getPlatformKind() {
return platformKind;
}
Create a new ValueKind
with a different PlatformKind
. Subclasses must override this to preserve the additional information added by the compiler. /**
* Create a new {@link ValueKind} with a different {@link PlatformKind}. Subclasses must
* override this to preserve the additional information added by the compiler.
*/
public abstract K changeType(PlatformKind newPlatformKind);
Returns a String representation of the kind, which will be included at the end of Object.toString()
implementation. Defaults to Object.toString()
but can be overridden to provide something more specific. /**
* Returns a String representation of the kind, which will be included at the end of
* {@link Value#toString()} implementation. Defaults to {@link #toString()} but can be
* overridden to provide something more specific.
*/
public String getKindSuffix() {
return toString();
}
}