SnippetLowerableMemoryNode.java revision 13083:b9a173f12fe6 
1/*
2 * Copyright (c) 2013, 2015, 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.replacements;
24
25import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_IGNORED;
26import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_IGNORED;
27
28import org.graalvm.api.word.LocationIdentity;
29import org.graalvm.compiler.core.common.type.Stamp;
30import org.graalvm.compiler.graph.NodeClass;
31import org.graalvm.compiler.graph.NodeInputList;
32import org.graalvm.compiler.nodeinfo.InputType;
33import org.graalvm.compiler.nodeinfo.NodeInfo;
34import org.graalvm.compiler.nodes.FixedWithNextNode;
35import org.graalvm.compiler.nodes.ValueNode;
36import org.graalvm.compiler.nodes.ValueNodeUtil;
37import org.graalvm.compiler.nodes.memory.MemoryAccess;
38import org.graalvm.compiler.nodes.memory.MemoryNode;
39import org.graalvm.compiler.nodes.spi.Lowerable;
40import org.graalvm.compiler.nodes.spi.LoweringTool;
41
42@NodeInfo(cycles = CYCLES_IGNORED, size = SIZE_IGNORED)
43public class SnippetLowerableMemoryNode extends FixedWithNextNode implements Lowerable, MemoryAccess {
44    public static final NodeClass<SnippetLowerableMemoryNode> TYPE = NodeClass.create(SnippetLowerableMemoryNode.class);
45
46    public interface SnippetLowering {
47        void lower(SnippetLowerableMemoryNode node, LoweringTool tool);
48    }
49
50    @Input protected NodeInputList<ValueNode> arguments;
51    @OptionalInput(InputType.Memory) protected MemoryNode lastLocationAccess;
52    private final LocationIdentity locationIdentity;
53    SnippetLowering lowering;
54
55    public SnippetLowerableMemoryNode(SnippetLowering lowering, LocationIdentity locationIdentity, Stamp stamp, ValueNode... arguments) {
56        super(TYPE, stamp);
57        this.arguments = new NodeInputList<>(this, arguments);
58        this.lowering = lowering;
59        this.locationIdentity = locationIdentity;
60    }
61
62    public ValueNode getArgument(int i) {
63        return arguments.get(i);
64    }
65
66    public int getArgumentCount() {
67        return arguments.size();
68    }
69
70    @Override
71    public void lower(LoweringTool tool) {
72        lowering.lower(this, tool);
73    }
74
75    @Override
76    public LocationIdentity getLocationIdentity() {
77        return locationIdentity;
78    }
79
80    @Override
81    public MemoryNode getLastLocationAccess() {
82        return lastLocationAccess;
83    }
84
85    @Override
86    public void setLastLocationAccess(MemoryNode lla) {
87        updateUsages(ValueNodeUtil.asNode(lastLocationAccess), ValueNodeUtil.asNode(lla));
88        lastLocationAccess = lla;
89    }
90}
91