Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/type/KlassPointerStamp.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 |
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/* * Copyright (c) 2014, 2015, 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 java.util.*; 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 final class KlassPointerStamp extends MetaspacePointerStamp { private static final KlassPointerStamp KLASS = new KlassPointerStamp(false, false); private static final KlassPointerStamp KLASS_NON_NULL = new KlassPointerStamp(true, false); private static final KlassPointerStamp KLASS_ALWAYS_NULL = new KlassPointerStamp(false, true); private final CompressEncoding encoding; public static KlassPointerStamp klass() { return KLASS; } public static KlassPointerStamp klassNonNull() { return KLASS_NON_NULL; } private KlassPointerStamp(boolean nonNull, boolean alwaysNull) { this(nonNull, alwaysNull, null); } private KlassPointerStamp(boolean nonNull, boolean alwaysNull, CompressEncoding encoding) { super(nonNull, alwaysNull); this.encoding = encoding; } @Override protected AbstractPointerStamp copyWith(boolean newNonNull, boolean newAlwaysNull) { return new KlassPointerStamp(newNonNull, newAlwaysNull, encoding); } @Override public boolean isCompatible(Stamp otherStamp) { if (this == otherStamp) { return true; } if (otherStamp instanceof KlassPointerStamp) { KlassPointerStamp other = (KlassPointerStamp) otherStamp; return Objects.equals(this.encoding, other.encoding); } return false; } @Override public Stamp constant(Constant c, MetaAccessProvider meta) { if (isCompressed()) { if (HotSpotCompressedNullConstant.COMPRESSED_NULL.equals(c)) { return new KlassPointerStamp(false, true, encoding); } } else { if (JavaConstant.NULL_POINTER.equals(c)) { return KLASS_ALWAYS_NULL; } } assert c instanceof HotSpotMetaspaceConstant; if (nonNull()) { return this; } if (isCompressed()) { return new KlassPointerStamp(true, false, encoding); } else { return KLASS_NON_NULL; } } @Override public Constant asConstant() { if (alwaysNull() && isCompressed()) { return HotSpotCompressedNullConstant.COMPRESSED_NULL; } else { return super.asConstant(); } } @Override public LIRKind getLIRKind(LIRKindTool tool) { if (isCompressed()) { return LIRKind.value(Kind.Int); } else { return super.getLIRKind(tool); } } public boolean isCompressed() { return encoding != null; } public CompressEncoding getEncoding() { return encoding; } public KlassPointerStamp compressed(CompressEncoding newEncoding) { assert !isCompressed(); return new KlassPointerStamp(nonNull(), alwaysNull(), newEncoding); } public KlassPointerStamp uncompressed() { assert isCompressed(); return new KlassPointerStamp(nonNull(), alwaysNull()); } @Override public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) { HotSpotMemoryAccessProvider hsProvider = (HotSpotMemoryAccessProvider) provider; if (isCompressed()) { return hsProvider.readNarrowKlassPointerConstant(base, displacement, encoding); } else { return hsProvider.readKlassPointerConstant(base, displacement); } } @Override public int hashCode() { final int prime = 31; int result = super.hashCode(); result = prime * result + ((encoding == null) ? 0 : encoding.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (!super.equals(obj)) { return false; } if (!(obj instanceof KlassPointerStamp)) { return false; } KlassPointerStamp other = (KlassPointerStamp) obj; return Objects.equals(this.encoding, other.encoding); } @Override public String toString() { StringBuilder ret = new StringBuilder("Klass*"); appendString(ret); if (isCompressed()) { ret.append("(compressed ").append(encoding).append(")"); } return ret.toString(); } }