Mercurial > hg > truffle
view graal/com.oracle.graal.compiler.common/src/com/oracle/graal/compiler/common/type/ObjectStamp.java @ 18490:ca81508f2a19
Generalize NULL handling to work on arbitrary pointers.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Mon, 24 Nov 2014 13:53:14 +0100 |
parents | d7cc487d1325 |
children | 48c1ebd24120 |
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/* * Copyright (c) 2012, 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.compiler.common.type; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.spi.*; public class ObjectStamp extends AbstractObjectStamp { public ObjectStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) { super(type, exactType, nonNull, alwaysNull); } @Override protected ObjectStamp copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) { return new ObjectStamp(type, exactType, nonNull, alwaysNull); } @Override public Stamp unrestricted() { return StampFactory.object(); } @Override public String toString() { StringBuilder str = new StringBuilder(); str.append('a'); appendString(str); return str.toString(); } @Override public boolean isCompatible(Stamp other) { if (this == other) { return true; } if (other instanceof ObjectStamp) { return true; } return false; } @Override public LIRKind getLIRKind(LIRKindTool tool) { return tool.getObjectKind(); } @Override public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) { return provider.readObjectConstant(base, displacement); } }