ObjectStamp.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.core.common.type;
24
25import org.graalvm.compiler.core.common.LIRKind;
26import org.graalvm.compiler.core.common.spi.LIRKindTool;
27
28import jdk.vm.ci.meta.Constant;
29import jdk.vm.ci.meta.JavaConstant;
30import jdk.vm.ci.meta.MemoryAccessProvider;
31import jdk.vm.ci.meta.ResolvedJavaType;
32
33public class ObjectStamp extends AbstractObjectStamp {
34
35    public ObjectStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) {
36        super(type, exactType, nonNull, alwaysNull);
37    }
38
39    @Override
40    protected ObjectStamp copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull) {
41        return new ObjectStamp(type, exactType, nonNull, alwaysNull);
42    }
43
44    @Override
45    public Stamp unrestricted() {
46        return StampFactory.object();
47    }
48
49    @Override
50    public String toString() {
51        StringBuilder str = new StringBuilder();
52        str.append('a');
53        appendString(str);
54        return str.toString();
55    }
56
57    @Override
58    public boolean isCompatible(Stamp other) {
59        if (this == other) {
60            return true;
61        }
62        if (other instanceof ObjectStamp) {
63            return true;
64        }
65        return false;
66    }
67
68    @Override
69    public boolean isCompatible(Constant constant) {
70        if (constant instanceof JavaConstant) {
71            return ((JavaConstant) constant).getJavaKind().isObject();
72        }
73        return false;
74    }
75
76    @Override
77    public LIRKind getLIRKind(LIRKindTool tool) {
78        return tool.getObjectKind();
79    }
80
81    @Override
82    public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) {
83        return provider.readObjectConstant(base, displacement);
84    }
85}
86