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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/target/amd64/HotSpotAMD64Backend.java @ 5841:f84d11672a86

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vtable dispatch inlining for megamorphic virtual calls now works and is enabled by default
author Doug Simon <doug.simon@oracle.com>
date Mon, 16 Jul 2012 15:20:50 +0200
parents f238fe91dc7f
children a432e6d43aa1
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1 /*
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2 * Copyright (c) 2012, 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.target.amd64;
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24
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25 import static com.oracle.graal.api.code.CallingConvention.Type.*;
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26 import static com.oracle.graal.api.code.ValueUtil.*;
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27 import static com.oracle.graal.hotspot.meta.HotSpotXirGenerator.*;
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28 import static com.oracle.graal.nodes.java.MethodCallTargetNode.InvokeKind.*;
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29 import static com.oracle.max.asm.target.amd64.AMD64.*;
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30
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31 import java.lang.reflect.*;
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32 import java.util.*;
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33
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34 import com.oracle.graal.api.code.*;
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35 import com.oracle.graal.api.code.CompilationResult.Mark;
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36 import com.oracle.graal.api.meta.*;
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37 import com.oracle.graal.compiler.*;
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38 import com.oracle.graal.compiler.gen.*;
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39 import com.oracle.graal.compiler.target.*;
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40 import com.oracle.graal.compiler.target.amd64.*;
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41 import com.oracle.graal.graph.*;
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42 import com.oracle.graal.hotspot.*;
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43 import com.oracle.graal.hotspot.counters.*;
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44 import com.oracle.graal.hotspot.meta.*;
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45 import com.oracle.graal.lir.*;
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46 import com.oracle.graal.lir.amd64.*;
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47 import com.oracle.graal.lir.asm.*;
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48 import com.oracle.graal.lir.asm.TargetMethodAssembler.*;
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49 import com.oracle.graal.nodes.*;
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50 import com.oracle.graal.nodes.java.*;
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51 import com.oracle.graal.nodes.java.MethodCallTargetNode.InvokeKind;
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52 import com.oracle.max.asm.*;
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53 import com.oracle.max.asm.target.amd64.*;
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54 import com.oracle.max.asm.target.amd64.AMD64Assembler.ConditionFlag;
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55 import com.oracle.max.cri.xir.*;
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56
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57 public class HotSpotAMD64Backend extends Backend {
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58
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59 public HotSpotAMD64Backend(CodeCacheProvider runtime, TargetDescription target) {
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60 super(runtime, target);
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61 }
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62
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63 @Override
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64 public LIRGenerator newLIRGenerator(Graph graph, FrameMap frameMap, ResolvedJavaMethod method, LIR lir, XirGenerator xir, Assumptions assumptions) {
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65 return new HotSpotAMD64LIRGenerator(graph, runtime, target, frameMap, method, lir, xir, assumptions);
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66 }
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67
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68 @Override
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69 public AMD64XirAssembler newXirAssembler() {
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70 return new AMD64XirAssembler(target);
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71 }
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72
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73 static final class HotSpotAMD64LIRGenerator extends AMD64LIRGenerator {
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74
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75 private HotSpotAMD64LIRGenerator(Graph graph, CodeCacheProvider runtime, TargetDescription target, FrameMap frameMap, ResolvedJavaMethod method, LIR lir, XirGenerator xir,
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76 Assumptions assumptions) {
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77 super(graph, runtime, target, frameMap, method, lir, xir, assumptions);
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78 }
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79
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80 @Override
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81 public void visitSafepointNode(SafepointNode i) {
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82 LIRFrameState info = state();
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83 append(new AMD64SafepointOp(info, ((HotSpotRuntime) runtime).config));
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84 }
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85
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86 @Override
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87 public void visitExceptionObject(ExceptionObjectNode x) {
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88 HotSpotVMConfig config = ((HotSpotRuntime) runtime).config;
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89 RegisterValue thread = r15.asValue();
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90 Address exceptionAddress = new Address(Kind.Object, thread, config.threadExceptionOopOffset);
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91 Address pcAddress = new Address(Kind.Long, thread, config.threadExceptionPcOffset);
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92 Value exception = emitLoad(exceptionAddress, false);
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93 emitStore(exceptionAddress, Constant.NULL_OBJECT, false);
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94 emitStore(pcAddress, Constant.LONG_0, false);
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95 setResult(x, exception);
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96 }
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97
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98 @Override
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99 protected void emitPrologue() {
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100 super.emitPrologue();
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101 MethodEntryCounters.emitCounter(this, method);
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102 }
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103
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104 @Override
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105 public void emitInvoke(Invoke x) {
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106 if (GraalOptions.XIRLowerInvokes) {
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107 super.emitInvoke(x);
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108 return;
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109 }
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110 final MethodCallTargetNode callTarget = x.callTarget();
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111 final InvokeKind invokeKind = callTarget.invokeKind();
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112 Kind[] signature = MetaUtil.signatureToKinds(callTarget.targetMethod().signature(), callTarget.isStatic() ? null : callTarget.targetMethod().holder().kind());
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113 CallingConvention cc = frameMap.registerConfig.getCallingConvention(JavaCall, signature, target(), false);
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114 frameMap.callsMethod(cc, JavaCall);
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115
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116 Value address = Constant.forLong(0L);
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117
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118 ValueNode methodOopNode = null;
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119
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120 if (callTarget.computedAddress() != null) {
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121 // If a virtual dispatch address was computed, then an extra argument
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122 // was append for passing the methodOop in RBX
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123 methodOopNode = callTarget.arguments().remove(callTarget.arguments().size() - 1);
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124
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125 if (invokeKind == Virtual) {
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126 address = operand(callTarget.computedAddress());
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127 } else {
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128 // An invokevirtual may have been canonicalized into an invokespecial;
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129 // the methodOop argument is ignored in this case
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130 }
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131 }
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132
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133 List<Value> argList = visitInvokeArguments(cc, callTarget.arguments());
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134
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135 if (methodOopNode != null) {
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136 Value methodOopArg = operand(methodOopNode);
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137 emitMove(methodOopArg, AMD64.rbx.asValue());
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138 argList.add(methodOopArg);
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139 }
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140
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141 final Mark[] callsiteForStaticCallStub = {null};
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142 if (invokeKind == Static || invokeKind == Special) {
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143 lir.stubs.add(new AMD64Code() {
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144 public String description() {
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145 return "static call stub for Invoke" + invokeKind;
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146 }
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147 @Override
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148 public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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149 assert callsiteForStaticCallStub[0] != null;
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150 tasm.recordMark(MARK_STATIC_CALL_STUB, callsiteForStaticCallStub);
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151 masm.movq(AMD64.rbx, 0L);
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152 Label dummy = new Label();
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153 masm.jmp(dummy);
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154 masm.bind(dummy);
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155 }
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156 });
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157 }
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158
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159 CallPositionListener cpl = new CallPositionListener() {
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160 @Override
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161 public void beforeCall(TargetMethodAssembler tasm) {
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162 if (invokeKind == Static || invokeKind == Special) {
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163 tasm.recordMark(invokeKind == Static ? MARK_INVOKESTATIC : MARK_INVOKESPECIAL);
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164 } else {
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165 // The mark for an invocation that uses an inline cache must be placed at the instruction
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166 // that loads the klassOop from the inline cache so that the C++ code can find it
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167 // and replace the inline null value with Universe::non_oop_word()
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168 assert invokeKind == Virtual || invokeKind == Interface;
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169 if (invokeKind == Virtual && callTarget.computedAddress() != null) {
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170 tasm.recordMark(MARK_INLINE_INVOKEVIRTUAL);
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171 } else {
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172 tasm.recordMark(invokeKind == Virtual ? MARK_INVOKEVIRTUAL : MARK_INVOKEINTERFACE);
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173 AMD64MacroAssembler masm = (AMD64MacroAssembler) tasm.asm;
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174 AMD64Move.move(tasm, masm, AMD64.rax.asValue(Kind.Object), Constant.NULL_OBJECT);
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175 }
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176 }
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177 }
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178 public void atCall(TargetMethodAssembler tasm) {
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179 if (invokeKind == Static || invokeKind == Special) {
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180 callsiteForStaticCallStub[0] = tasm.recordMark(null);
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181 }
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182 }
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183 };
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184
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185 LIRFrameState callState = stateFor(x.stateDuring(), null, x instanceof InvokeWithExceptionNode ? getLIRBlock(((InvokeWithExceptionNode) x).exceptionEdge()) : null, x.leafGraphId());
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186 Value result = resultOperandFor(x.node().kind());
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187 emitCall(callTarget.targetMethod(), result, argList, address, callState, cpl);
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188
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189 if (isLegal(result)) {
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190 setResult(x.node(), emitMove(result));
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191 }
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192 }
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193 }
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194
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195 class HotSpotFrameContext implements FrameContext {
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196
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197 @Override
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198 public void enter(TargetMethodAssembler tasm) {
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199 FrameMap frameMap = tasm.frameMap;
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200 int frameSize = frameMap.frameSize();
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201
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202 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
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203 emitStackOverflowCheck(tasm, false);
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diff changeset
204 asm.push(rbp);
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205 asm.movq(rbp, rsp);
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206 asm.decrementq(rsp, frameSize - 8); // account for the push of RBP above
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diff changeset
207 if (GraalOptions.ZapStackOnMethodEntry) {
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208 final int intSize = 4;
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diff changeset
209 for (int i = 0; i < frameSize / intSize; ++i) {
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diff changeset
210 asm.movl(new Address(Kind.Int, rsp.asValue(), i * intSize), 0xC1C1C1C1);
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211 }
5251
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212 }
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diff changeset
213 CalleeSaveLayout csl = frameMap.registerConfig.getCalleeSaveLayout();
5251
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diff changeset
214 if (csl != null && csl.size != 0) {
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215 int frameToCSA = frameMap.offsetToCalleeSaveArea();
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diff changeset
216 assert frameToCSA >= 0;
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217 asm.save(csl, frameToCSA);
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218 }
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219 }
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diff changeset
220
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parents:
diff changeset
221 @Override
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diff changeset
222 public void leave(TargetMethodAssembler tasm) {
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diff changeset
223 int frameSize = tasm.frameMap.frameSize();
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parents:
diff changeset
224 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
5547
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
225 CalleeSaveLayout csl = tasm.frameMap.registerConfig.getCalleeSaveLayout();
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226 RegisterConfig regConfig = tasm.frameMap.registerConfig;
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227
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228 if (csl != null && csl.size != 0) {
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229 tasm.targetMethod.setRegisterRestoreEpilogueOffset(asm.codeBuffer.position());
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230 // saved all registers, restore all registers
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231 int frameToCSA = tasm.frameMap.offsetToCalleeSaveArea();
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232 asm.restore(csl, frameToCSA);
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233 }
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234
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235 asm.incrementq(rsp, frameSize - 8); // account for the pop of RBP below
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236 asm.pop(rbp);
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237
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238 if (GraalOptions.GenSafepoints) {
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239 HotSpotVMConfig config = ((HotSpotRuntime) runtime).config;
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240
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241 // If at the return point, then the frame has already been popped
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242 // so deoptimization cannot be performed here. The HotSpot runtime
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243 // detects this case - see the definition of frame::should_be_deoptimized()
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244
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245 Register scratch = regConfig.getScratchRegister();
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246 if (config.isPollingPageFar) {
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247 asm.movq(scratch, config.safepointPollingAddress);
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248 tasm.recordMark(MARK_POLL_RETURN_FAR);
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249 asm.movq(scratch, new Address(tasm.target.wordKind, scratch.asValue()));
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250 } else {
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251 tasm.recordMark(MARK_POLL_RETURN_NEAR);
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252 asm.movq(scratch, new Address(tasm.target.wordKind, rip.asValue()));
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253 }
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254 }
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255 }
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256 }
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257
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258 @Override
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259 public TargetMethodAssembler newAssembler(FrameMap frameMap, LIR lir) {
5251
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260 // Omit the frame if the method:
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261 // - has no spill slots or other slots allocated during register allocation
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262 // - has no callee-saved registers
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263 // - has no incoming arguments passed on the stack
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264 // - has no instructions with debug info
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265 boolean canOmitFrame =
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266 frameMap.frameSize() == frameMap.initialFrameSize &&
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267 frameMap.registerConfig.getCalleeSaveLayout().registers.length == 0 &&
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268 !lir.hasArgInCallerFrame() &&
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269 !lir.hasDebugInfo();
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270
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271 AbstractAssembler masm = new AMD64MacroAssembler(target, frameMap.registerConfig);
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272 HotSpotFrameContext frameContext = canOmitFrame ? null : new HotSpotFrameContext();
5273
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273 TargetMethodAssembler tasm = new TargetMethodAssembler(target, runtime, frameMap, masm, frameContext, lir.stubs);
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274 tasm.setFrameSize(frameMap.frameSize());
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275 tasm.targetMethod.setCustomStackAreaOffset(frameMap.offsetToCustomArea());
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276 return tasm;
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277 }
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278
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279 @Override
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280 public void emitCode(TargetMethodAssembler tasm, ResolvedJavaMethod method, LIR lir) {
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281 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
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282 FrameMap frameMap = tasm.frameMap;
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283 RegisterConfig regConfig = frameMap.registerConfig;
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284 HotSpotVMConfig config = ((HotSpotRuntime) runtime).config;
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285 Label unverifiedStub = new Label();
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286
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287 // Emit the prefix
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288 tasm.recordMark(MARK_OSR_ENTRY);
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289
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290 boolean isStatic = Modifier.isStatic(method.accessFlags());
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291 if (!isStatic) {
5255
38feba3e8526 separated safepoints out of LoopEndNodes into SafepointNodes
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diff changeset
292 tasm.recordMark(MARK_UNVERIFIED_ENTRY);
5547
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293 CallingConvention cc = regConfig.getCallingConvention(JavaCallee, new Kind[] {Kind.Object}, target, false);
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294 Register inlineCacheKlass = rax; // see definition of IC_Klass in c1_LIRAssembler_x86.cpp
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295 Register receiver = asRegister(cc.locations[0]);
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296 Address src = new Address(target.wordKind, receiver.asValue(), config.hubOffset);
5233
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297
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298 asm.cmpq(inlineCacheKlass, src);
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299 asm.jcc(ConditionFlag.notEqual, unverifiedStub);
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300 }
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301
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302 asm.align(config.codeEntryAlignment);
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303 tasm.recordMark(MARK_VERIFIED_ENTRY);
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304
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305 // Emit code for the LIR
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306 lir.emitCode(tasm);
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307
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308 boolean frameOmitted = tasm.frameContext == null;
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309 if (!frameOmitted) {
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310 tasm.recordMark(MARK_EXCEPTION_HANDLER_ENTRY);
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311 AMD64Call.directCall(tasm, asm, config.handleExceptionStub, null);
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312 AMD64Call.shouldNotReachHere(tasm, asm);
5233
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313
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314 tasm.recordMark(MARK_DEOPT_HANDLER_ENTRY);
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315 AMD64Call.directCall(tasm, asm, config.handleDeoptStub, null);
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316 AMD64Call.shouldNotReachHere(tasm, asm);
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317 } else {
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318 // No need to emit the stubs for entries back into the method since
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319 // it has no calls that can cause such "return" entries
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320 assert !frameMap.accessesCallerFrame();
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321 }
5233
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diff changeset
322
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323 if (!isStatic) {
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diff changeset
324 asm.bind(unverifiedStub);
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325 AMD64Call.directJmp(tasm, asm, config.inlineCacheMissStub);
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326 }
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diff changeset
327
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328 for (int i = 0; i < GraalOptions.MethodEndBreakpointGuards; ++i) {
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diff changeset
329 asm.int3();
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parents:
diff changeset
330 }
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parents:
diff changeset
331 }
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332 }