Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/type/NarrowOopStamp.java @ 21543:93c50cefb9e8
moved GraalInternalError to com.oracle.jvmci.common and renamed it to JVMCIError (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Mon, 25 May 2015 23:30:34 +0200 |
parents | 1da7aef31a08 |
children | 5324104ac4f3 |
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.nodes.type; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.spi.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.hotspot.jvmci.*; import com.oracle.graal.hotspot.jvmci.HotSpotVMConfig.CompressEncoding; 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 LIRKind.reference(Kind.Int); } @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, encoding); } @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; } } }