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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ArrayCopyNode.java @ 9049:6d376d09880b

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Make CanonicalizerPhase reentrant.
author Roland Schatz <roland.schatz@oracle.com>
date Fri, 12 Apr 2013 13:50:45 +0200
parents f2bcc49a1430
children 989db61f2007
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.replacements;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.debug.*;
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27 import com.oracle.graal.graph.Node.IterableNodeType;
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28 import com.oracle.graal.loop.phases.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.spi.*;
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31 import com.oracle.graal.nodes.virtual.*;
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32 import com.oracle.graal.phases.*;
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33 import com.oracle.graal.phases.common.*;
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34 import com.oracle.graal.replacements.nodes.*;
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35
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36 public class ArrayCopyNode extends MacroNode implements Virtualizable, IterableNodeType, Lowerable {
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37
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38 public ArrayCopyNode(Invoke invoke) {
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39 super(invoke);
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40 }
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41
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42 private ValueNode getSource() {
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43 return arguments.get(0);
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44 }
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45
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46 private ValueNode getSourcePosition() {
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47 return arguments.get(1);
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48 }
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49
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50 private ValueNode getDestination() {
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51 return arguments.get(2);
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52 }
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53
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54 private ValueNode getDestinationPosition() {
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55 return arguments.get(3);
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56 }
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57
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58 private ValueNode getLength() {
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59 return arguments.get(4);
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60 }
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61
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62 private StructuredGraph selectSnippet(LoweringTool tool, Replacements replacements) {
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63 ResolvedJavaType srcType = getSource().objectStamp().type();
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64 ResolvedJavaType destType = getDestination().objectStamp().type();
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65
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66 if (srcType == null || !srcType.isArray() || destType == null || !destType.isArray()) {
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67 return null;
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68 }
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69 if (!destType.getComponentType().isAssignableFrom(srcType.getComponentType()) || !getDestination().objectStamp().isExactType()) {
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70 return null;
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71 }
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72 Kind componentKind = srcType.getComponentType().getKind();
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73 ResolvedJavaMethod snippetMethod = tool.getRuntime().lookupJavaMethod(ArrayCopySnippets.getSnippetForKind(componentKind));
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74 return replacements.getSnippet(snippetMethod);
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75 }
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76
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77 private static void unrollFixedLengthLoop(StructuredGraph snippetGraph, int length, LoweringTool tool) {
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78 LocalNode lengthLocal = snippetGraph.getLocal(4);
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79 if (lengthLocal != null) {
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80 snippetGraph.replaceFloating(lengthLocal, ConstantNode.forInt(length, snippetGraph));
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81 }
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82 // the canonicalization before loop unrolling is needed to propagate the length into
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83 // additions, etc.
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84 new CanonicalizerPhase.Instance(tool.getRuntime(), tool.assumptions()).apply(snippetGraph);
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85 new LoopFullUnrollPhase(tool.getRuntime(), tool.assumptions()).apply(snippetGraph);
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86 new CanonicalizerPhase.Instance(tool.getRuntime(), tool.assumptions()).apply(snippetGraph);
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87 }
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88
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89 @Override
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90 protected StructuredGraph getSnippetGraph(LoweringTool tool) {
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91 if (!GraalOptions.IntrinsifyArrayCopy) {
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92 return null;
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93 }
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94
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95 Replacements replacements = tool.getReplacements();
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96 StructuredGraph snippetGraph = selectSnippet(tool, replacements);
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97 if (snippetGraph == null) {
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98 ResolvedJavaMethod snippetMethod = tool.getRuntime().lookupJavaMethod(ArrayCopySnippets.genericArraycopySnippet);
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99 snippetGraph = replacements.getSnippet(snippetMethod).copy();
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100 replaceSnippetInvokes(snippetGraph);
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101 } else {
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102 assert snippetGraph != null : "ArrayCopySnippets should be installed";
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103
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104 if (getLength().isConstant()) {
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105 snippetGraph = snippetGraph.copy();
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106 unrollFixedLengthLoop(snippetGraph, getLength().asConstant().asInt(), tool);
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107 }
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108 }
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109 return snippetGraph;
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110 }
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111
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112 private static boolean checkBounds(int position, int length, VirtualObjectNode virtualObject) {
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113 return position >= 0 && position + length <= virtualObject.entryCount();
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114 }
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115
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116 private static boolean checkEntryTypes(int srcPos, int length, State srcState, ResolvedJavaType destComponentType) {
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117 if (destComponentType.getKind() == Kind.Object) {
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118 for (int i = 0; i < length; i++) {
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119 if (!destComponentType.isAssignableFrom(srcState.getEntry(srcPos + i).objectStamp().type())) {
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120 return false;
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121 }
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122 }
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123 }
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124 return true;
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125 }
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126
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127 @Override
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128 public void virtualize(VirtualizerTool tool) {
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129 if (getSourcePosition().isConstant() && getDestinationPosition().isConstant() && getLength().isConstant()) {
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130 int srcPos = getSourcePosition().asConstant().asInt();
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131 int destPos = getDestinationPosition().asConstant().asInt();
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132 int length = getLength().asConstant().asInt();
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133 State srcState = tool.getObjectState(getSource());
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134 State destState = tool.getObjectState(getDestination());
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135
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136 if (srcState != null && srcState.getState() == EscapeState.Virtual && destState != null && destState.getState() == EscapeState.Virtual) {
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137 VirtualObjectNode srcVirtual = srcState.getVirtualObject();
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138 VirtualObjectNode destVirtual = destState.getVirtualObject();
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139 if (length < 0 || !checkBounds(srcPos, length, srcVirtual) || !checkBounds(destPos, length, destVirtual)) {
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140 return;
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141 }
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142 if (!checkEntryTypes(srcPos, length, srcState, destVirtual.type().getComponentType())) {
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143 return;
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144 }
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145 for (int i = 0; i < length; i++) {
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146 tool.setVirtualEntry(destState, destPos + i, srcState.getEntry(srcPos + i));
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147 }
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148 tool.delete();
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149 if (Debug.isLogEnabled()) {
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150 Debug.log("virtualized arraycopyf(%s, %d, %s, %d, %d)", getSource(), srcPos, getDestination(), destPos, length);
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151 }
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152 }
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153 }
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154 }
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155 }