FixedAccessNode.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2011, 2016, 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.nodes.memory;
24
25import org.graalvm.compiler.core.common.LocationIdentity;
26import org.graalvm.compiler.core.common.type.Stamp;
27import org.graalvm.compiler.graph.NodeClass;
28import org.graalvm.compiler.nodeinfo.InputType;
29import org.graalvm.compiler.nodeinfo.NodeInfo;
30import org.graalvm.compiler.nodes.DeoptimizingFixedWithNextNode;
31import org.graalvm.compiler.nodes.FrameState;
32import org.graalvm.compiler.nodes.extended.GuardingNode;
33import org.graalvm.compiler.nodes.memory.address.AddressNode;
34
35/**
36 * Accesses a value at an memory address specified by an {@linkplain #address address}. The access
37 * does not include a null check on the object.
38 */
39@NodeInfo
40public abstract class FixedAccessNode extends DeoptimizingFixedWithNextNode implements Access {
41    public static final NodeClass<FixedAccessNode> TYPE = NodeClass.create(FixedAccessNode.class);
42
43    @OptionalInput(InputType.Guard) protected GuardingNode guard;
44
45    @Input(InputType.Association) AddressNode address;
46    protected final LocationIdentity location;
47
48    protected boolean nullCheck;
49    protected BarrierType barrierType;
50
51    @Override
52    public AddressNode getAddress() {
53        return address;
54    }
55
56    public void setAddress(AddressNode address) {
57        updateUsages(this.address, address);
58        this.address = address;
59    }
60
61    @Override
62    public LocationIdentity getLocationIdentity() {
63        return location;
64    }
65
66    public boolean getNullCheck() {
67        return nullCheck;
68    }
69
70    public void setNullCheck(boolean check) {
71        this.nullCheck = check;
72    }
73
74    protected FixedAccessNode(NodeClass<? extends FixedAccessNode> c, AddressNode address, LocationIdentity location, Stamp stamp) {
75        this(c, address, location, stamp, BarrierType.NONE);
76    }
77
78    protected FixedAccessNode(NodeClass<? extends FixedAccessNode> c, AddressNode address, LocationIdentity location, Stamp stamp, BarrierType barrierType) {
79        this(c, address, location, stamp, null, barrierType, false, null);
80    }
81
82    protected FixedAccessNode(NodeClass<? extends FixedAccessNode> c, AddressNode address, LocationIdentity location, Stamp stamp, GuardingNode guard, BarrierType barrierType, boolean nullCheck,
83                    FrameState stateBefore) {
84        super(c, stamp, stateBefore);
85        this.address = address;
86        this.location = location;
87        this.guard = guard;
88        this.barrierType = barrierType;
89        this.nullCheck = nullCheck;
90    }
91
92    @Override
93    public boolean canDeoptimize() {
94        return nullCheck;
95    }
96
97    @Override
98    public GuardingNode getGuard() {
99        return guard;
100    }
101
102    @Override
103    public void setGuard(GuardingNode guard) {
104        updateUsagesInterface(this.guard, guard);
105        this.guard = guard;
106    }
107
108    @Override
109    public BarrierType getBarrierType() {
110        return barrierType;
111    }
112}
113