Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotObjectConstantImpl.java @ 18282:ecf3de366ecc
added HotSpotObjectConstant.getIdentityHashCode()
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 06 Nov 2014 13:24:16 +0100 |
parents | c7e0405a35d8 |
children | b2eb7302706c |
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/* * Copyright (c) 2009, 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.*; /** * Represents a constant non-{@code null} object reference, within the compiler and across the * compiler/runtime interface. */ public final class HotSpotObjectConstantImpl extends JavaConstant implements HotSpotObjectConstant { private static final long serialVersionUID = 3592151693708093496L; public static JavaConstant forObject(Object object) { if (object == null) { return JavaConstant.NULL_OBJECT; } else { return new HotSpotObjectConstantImpl(object, false); } } public static JavaConstant forBoxedValue(Kind kind, Object value) { if (kind == Kind.Object) { return HotSpotObjectConstantImpl.forObject(value); } else { return JavaConstant.forBoxedPrimitive(value); } } public static Object asObject(Constant constant) { if (JavaConstant.isNull(constant)) { return null; } else { return ((HotSpotObjectConstantImpl) constant).object; } } public static Object asBoxedValue(Constant constant) { if (JavaConstant.isNull(constant)) { return null; } else if (constant instanceof HotSpotObjectConstantImpl) { return ((HotSpotObjectConstantImpl) constant).object; } else { return ((JavaConstant) constant).asBoxedPrimitive(); } } public static boolean isCompressed(Constant constant) { if (JavaConstant.isNull(constant)) { return HotSpotCompressedNullConstant.NULL_OBJECT.equals(constant); } else { return ((HotSpotObjectConstantImpl) constant).compressed; } } private final Object object; private final boolean compressed; private HotSpotObjectConstantImpl(Object object, boolean compressed) { super(LIRKind.reference(compressed ? Kind.Int : Kind.Object)); this.object = object; this.compressed = compressed; assert object != null; } public JavaConstant compress() { assert !compressed; return new HotSpotObjectConstantImpl(object, true); } public JavaConstant uncompress() { assert compressed; return new HotSpotObjectConstantImpl(object, false); } public JavaConstant getClassLoader() { if (object instanceof Class) { /* * This is an intrinsic for getClassLoader0, which occurs after any security checks. We * can't call that directly so just call getClassLoader. */ return HotSpotObjectConstantImpl.forObject(((Class<?>) object).getClassLoader()); } return null; } public int getIdentityHashCode() { return System.identityHashCode(object); } @Override public boolean isNull() { return false; } @Override public boolean isDefaultForKind() { return false; } @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 int hashCode() { return System.identityHashCode(object); } @Override public boolean equals(Object o) { return o == this || (o instanceof HotSpotObjectConstantImpl && super.equals(o) && object == ((HotSpotObjectConstantImpl) o).object); } @Override public String toValueString() { if (object instanceof String) { return (String) object; } else { return Kind.Object.format(object); } } @Override public String toString() { return (compressed ? "NarrowOop" : getKind().getJavaName()) + "[" + Kind.Object.format(object) + "]"; } }