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 */
23 package org.graalvm.compiler.nodes.extended;
24
25 import static org.graalvm.compiler.nodeinfo.InputType.State;
26 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_3;
27 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
28
29 import org.graalvm.compiler.core.common.LocationIdentity;
30 import org.graalvm.compiler.core.common.type.StampFactory;
31 import org.graalvm.compiler.graph.NodeClass;
32 import org.graalvm.compiler.nodeinfo.NodeInfo;
33 import org.graalvm.compiler.nodes.ConstantNode;
34 import org.graalvm.compiler.nodes.FrameState;
35 import org.graalvm.compiler.nodes.StateSplit;
36 import org.graalvm.compiler.nodes.ValueNode;
37 import org.graalvm.compiler.nodes.java.StoreFieldNode;
38 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
39 import org.graalvm.compiler.nodes.spi.Lowerable;
40 import org.graalvm.compiler.nodes.spi.LoweringTool;
41 import org.graalvm.compiler.nodes.spi.Virtualizable;
42 import org.graalvm.compiler.nodes.spi.VirtualizerTool;
43 import org.graalvm.compiler.nodes.virtual.VirtualObjectNode;
44
45 import jdk.vm.ci.meta.Assumptions;
46 import jdk.vm.ci.meta.JavaConstant;
47 import jdk.vm.ci.meta.JavaKind;
48 import jdk.vm.ci.meta.ResolvedJavaField;
49
50 /**
51 * Store of a value at a location specified as an offset relative to an object. No null check is
52 * performed before the store.
53 */
54 @NodeInfo(cycles = CYCLES_3, size = SIZE_1)
55 public final class UnsafeStoreNode extends UnsafeAccessNode implements StateSplit, Lowerable, Virtualizable, MemoryCheckpoint.Single {
56
57 public static final NodeClass<UnsafeStoreNode> TYPE = NodeClass.create(UnsafeStoreNode.class);
58 @Input ValueNode value;
59 @OptionalInput(State) FrameState stateAfter;
60
61 public UnsafeStoreNode(ValueNode object, ValueNode offset, ValueNode value, JavaKind accessKind, LocationIdentity locationIdentity) {
62 this(object, offset, value, accessKind, locationIdentity, null);
63 }
64
65 public UnsafeStoreNode(ValueNode object, ValueNode offset, ValueNode value, JavaKind accessKind, LocationIdentity locationIdentity, FrameState stateAfter) {
66 super(TYPE, StampFactory.forVoid(), object, offset, accessKind, locationIdentity);
67 this.value = value;
68 this.stateAfter = stateAfter;
69 assert accessKind != JavaKind.Void && accessKind != JavaKind.Illegal;
70 }
71
72 @Override
73 public FrameState stateAfter() {
74 return stateAfter;
75 }
76
77 @Override
78 public void setStateAfter(FrameState x) {
79 assert x == null || x.isAlive() : "frame state must be in a graph";
80 updateUsages(stateAfter, x);
81 stateAfter = x;
82 }
83
84 @Override
85 public boolean hasSideEffect() {
86 return true;
87 }
88
89 public ValueNode value() {
90 return value;
91 }
92
93 @Override
94 public void lower(LoweringTool tool) {
95 tool.getLowerer().lower(this, tool);
96 }
97
98 @Override
99 public void virtualize(VirtualizerTool tool) {
100 ValueNode alias = tool.getAlias(object());
101 if (alias instanceof VirtualObjectNode) {
102 VirtualObjectNode virtual = (VirtualObjectNode) alias;
103 ValueNode indexValue = tool.getAlias(offset());
104 if (indexValue.isConstant()) {
105 long off = indexValue.asJavaConstant().asLong();
106 int entryIndex = virtual.entryIndexForOffset(off, accessKind());
107 if (entryIndex != -1) {
108 JavaKind entryKind = virtual.entryKind(entryIndex);
109 ValueNode entry = tool.getEntry(virtual, entryIndex);
110 if (entry.getStackKind() == value.getStackKind() || entryKind == accessKind()) {
111 tool.setVirtualEntry(virtual, entryIndex, value(), true);
112 tool.delete();
113 } else {
114 if ((accessKind() == JavaKind.Long || accessKind() == JavaKind.Double) && entryKind == JavaKind.Int) {
115 int nextIndex = virtual.entryIndexForOffset(off + 4, entryKind);
116 if (nextIndex != -1) {
117 JavaKind nextKind = virtual.entryKind(nextIndex);
118 if (nextKind == JavaKind.Int) {
119 tool.setVirtualEntry(virtual, entryIndex, value(), true);
120 tool.setVirtualEntry(virtual, nextIndex, ConstantNode.forConstant(JavaConstant.forIllegal(), tool.getMetaAccessProvider(), graph()), true);
121 tool.delete();
122 }
123 }
124 }
125 }
126 }
127 }
128 }
129 }
130
131 @Override
132 protected ValueNode cloneAsFieldAccess(Assumptions assumptions, ResolvedJavaField field) {
133 return new StoreFieldNode(object(), field, value(), stateAfter());
134 }
135
136 @Override
137 protected ValueNode cloneAsArrayAccess(ValueNode location, LocationIdentity identity) {
138 return new UnsafeStoreNode(object(), location, value, accessKind(), identity, stateAfter());
139 }
140
141 public FrameState getState() {
142 return stateAfter;
143 }
144 }