Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotCompressedNullConstant.java @ 16094:c0b8d395368b
Introduce LIRKind to accurately track oop references in backend.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Fri, 13 Jun 2014 11:47:44 +0200 |
parents | e43591136d9f |
children | 4dd2cedc7f57 |
line wrap: on
line source
/* * Copyright (c) 2014, 2014, 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 com.oracle.graal.hotspot.meta; import com.oracle.graal.api.meta.*; /** * The compressed representation of the {@link Constant#NULL_OBJECT null constant}. */ public final class HotSpotCompressedNullConstant extends Constant implements HotSpotConstant { private static final long serialVersionUID = 8906209595800783961L; public static final Constant COMPRESSED_NULL = new HotSpotCompressedNullConstant(); private HotSpotCompressedNullConstant() { super(LIRKind.reference(Kind.Int)); } @Override public boolean isNull() { return true; } @Override public boolean isDefaultForKind() { return true; } @Override public Object asBoxedPrimitive() { throw new IllegalArgumentException(); } @Override public int asInt() { throw new IllegalArgumentException(); } @Override public boolean asBoolean() { throw new IllegalArgumentException(); } @Override public long asLong() { throw new IllegalArgumentException(); } @Override public float asFloat() { throw new IllegalArgumentException(); } @Override public double asDouble() { throw new IllegalArgumentException(); } @Override public String toValueString() { return "null"; } @Override public int hashCode() { return System.identityHashCode(this); } @Override public boolean equals(Object o) { assert o == this || !(o instanceof HotSpotCompressedNullConstant) : "null constant is a singleton"; return o == this; } }