1 /*
2 * Copyright (c) 2014, 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 //JaCoCo Exclude
24 package org.graalvm.compiler.hotspot.replacements.arraycopy;
25
26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayBaseOffset;
27 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayIndexScale;
28 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
29 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_UNKNOWN;
30
31 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
32 import org.graalvm.compiler.core.common.type.PrimitiveStamp;
33 import org.graalvm.compiler.core.common.type.StampFactory;
34 import org.graalvm.compiler.graph.NodeClass;
35 import org.graalvm.compiler.hotspot.HotSpotGraalRuntimeProvider;
36 import org.graalvm.compiler.hotspot.meta.HotSpotHostForeignCallsProvider;
37 import org.graalvm.compiler.hotspot.nodes.GetObjectAddressNode;
38 import org.graalvm.compiler.nodeinfo.InputType;
39 import org.graalvm.compiler.nodeinfo.NodeInfo;
40 import org.graalvm.compiler.nodes.ConstantNode;
41 import org.graalvm.compiler.nodes.FixedWithNextNode;
42 import org.graalvm.compiler.nodes.StructuredGraph;
43 import org.graalvm.compiler.nodes.ValueNode;
44 import org.graalvm.compiler.nodes.calc.AddNode;
45 import org.graalvm.compiler.nodes.calc.IntegerConvertNode;
46 import org.graalvm.compiler.nodes.calc.LeftShiftNode;
47 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
48 import org.graalvm.compiler.nodes.memory.AbstractMemoryCheckpoint;
49 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
50 import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;
51 import org.graalvm.compiler.nodes.spi.Lowerable;
52 import org.graalvm.compiler.nodes.spi.LoweringTool;
53 import org.graalvm.compiler.word.Word;
54 import org.graalvm.word.LocationIdentity;
55
56 import jdk.vm.ci.code.CodeUtil;
57 import jdk.vm.ci.meta.JavaKind;
58
59 @NodeInfo(allowedUsageTypes = {InputType.Memory, InputType.Value}, cycles = CYCLES_UNKNOWN, size = SIZE_UNKNOWN)
60 public final class CheckcastArrayCopyCallNode extends AbstractMemoryCheckpoint implements Lowerable, MemoryCheckpoint.Single {
61
62 public static final NodeClass<CheckcastArrayCopyCallNode> TYPE = NodeClass.create(CheckcastArrayCopyCallNode.class);
63 @Input ValueNode src;
64 @Input ValueNode srcPos;
65 @Input ValueNode dest;
66 @Input ValueNode destPos;
67 @Input ValueNode length;
68 @Input ValueNode destElemKlass;
69 @Input ValueNode superCheckOffset;
70
71 protected final boolean uninit;
72
73 protected final HotSpotGraalRuntimeProvider runtime;
74
75 protected CheckcastArrayCopyCallNode(@InjectedNodeParameter HotSpotGraalRuntimeProvider runtime, ValueNode src, ValueNode srcPos, ValueNode dest, ValueNode destPos, ValueNode length,
76 ValueNode superCheckOffset, ValueNode destElemKlass, boolean uninit) {
77 super(TYPE, StampFactory.forKind(JavaKind.Int));
78 this.src = src;
79 this.srcPos = srcPos;
80 this.dest = dest;
81 this.destPos = destPos;
82 this.length = length;
83 this.superCheckOffset = superCheckOffset;
84 this.destElemKlass = destElemKlass;
85 this.uninit = uninit;
86 this.runtime = runtime;
87 }
88
89 public ValueNode getSource() {
90 return src;
91 }
92
93 public ValueNode getSourcePosition() {
94 return srcPos;
95 }
96
97 public ValueNode getDestination() {
98 return dest;
99 }
100
101 public ValueNode getDestinationPosition() {
102 return destPos;
103 }
104
105 public ValueNode getLength() {
106 return length;
107 }
108
109 public boolean isUninit() {
110 return uninit;
111 }
112
113 private ValueNode computeBase(ValueNode base, ValueNode pos) {
114 FixedWithNextNode basePtr = graph().add(new GetObjectAddressNode(base));
115 graph().addBeforeFixed(this, basePtr);
116
117 int shift = CodeUtil.log2(getArrayIndexScale(JavaKind.Object));
118 ValueNode extendedPos = IntegerConvertNode.convert(pos, StampFactory.forKind(runtime.getTarget().wordJavaKind), graph());
119 ValueNode scaledIndex = graph().unique(new LeftShiftNode(extendedPos, ConstantNode.forInt(shift, graph())));
120 ValueNode offset = graph().unique(new AddNode(scaledIndex, ConstantNode.forIntegerBits(PrimitiveStamp.getBits(scaledIndex.stamp()), getArrayBaseOffset(JavaKind.Object), graph())));
121 return graph().unique(new OffsetAddressNode(basePtr, offset));
122 }
123
124 @Override
125 public void lower(LoweringTool tool) {
126 if (graph().getGuardsStage().areFrameStatesAtDeopts()) {
127 ForeignCallDescriptor desc = HotSpotHostForeignCallsProvider.lookupCheckcastArraycopyDescriptor(isUninit());
128 StructuredGraph graph = graph();
129 ValueNode srcAddr = computeBase(getSource(), getSourcePosition());
130 ValueNode destAddr = computeBase(getDestination(), getDestinationPosition());
131 ValueNode len = getLength();
132 if (len.stamp().getStackKind() != runtime.getTarget().wordJavaKind) {
133 len = IntegerConvertNode.convert(len, StampFactory.forKind(runtime.getTarget().wordJavaKind), graph());
134 }
135 ForeignCallNode call = graph.add(new ForeignCallNode(runtime.getHostBackend().getForeignCalls(), desc, srcAddr, destAddr, len, superCheckOffset, destElemKlass));
136 call.setStateAfter(stateAfter());
137 graph.replaceFixedWithFixed(this, call);
138 }
139 }
140
141 @Override
142 public LocationIdentity getLocationIdentity() {
143 /*
144 * Because of restrictions that the memory graph of snippets matches the original node,
145 * pretend that we kill any.
146 */
147 return LocationIdentity.any();
148 }
149
150 @NodeIntrinsic
151 public static native int checkcastArraycopy(Object src, int srcPos, Object dest, int destPos, int length, Word superCheckOffset, Object destElemKlass, @ConstantNodeParameter boolean uninit);
152 }