Mercurial > hg > truffle
annotate src/share/vm/opto/escape.cpp @ 6024:973046802b6f
7162955: Attach api on Solaris, too many open files
Summary: Release server-side socket after client receives it.
Reviewed-by: sla, dsamersoff, dcubed, acorn
Contributed-by: dean.long@oracle.com
author | dlong |
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date | Thu, 26 Apr 2012 16:24:15 -0400 |
parents | ed4c92f54c2d |
children | 1d7922586cf6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "ci/bcEscapeAnalyzer.hpp" | |
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27 #include "compiler/compileLog.hpp" |
1972 | 28 #include "libadt/vectset.hpp" |
29 #include "memory/allocation.hpp" | |
30 #include "opto/c2compiler.hpp" | |
31 #include "opto/callnode.hpp" | |
32 #include "opto/cfgnode.hpp" | |
33 #include "opto/compile.hpp" | |
34 #include "opto/escape.hpp" | |
35 #include "opto/phaseX.hpp" | |
36 #include "opto/rootnode.hpp" | |
0 | 37 |
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38 ConnectionGraph::ConnectionGraph(Compile * C, PhaseIterGVN *igvn) : |
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39 _nodes(C->comp_arena(), C->unique(), C->unique(), NULL), |
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40 _collecting(true), |
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41 _verify(false), |
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42 _compile(C), |
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43 _igvn(igvn), |
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44 _node_map(C->comp_arena()) { |
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45 // Add unknown java object. |
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46 add_java_object(C->top(), PointsToNode::GlobalEscape); |
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47 phantom_obj = ptnode_adr(C->top()->_idx)->as_JavaObject(); |
253
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48 // Add ConP(#NULL) and ConN(#NULL) nodes. |
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49 Node* oop_null = igvn->zerocon(T_OBJECT); |
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50 assert(oop_null->_idx < nodes_size(), "should be created already"); |
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51 add_java_object(oop_null, PointsToNode::NoEscape); |
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52 null_obj = ptnode_adr(oop_null->_idx)->as_JavaObject(); |
253
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53 if (UseCompressedOops) { |
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54 Node* noop_null = igvn->zerocon(T_NARROWOOP); |
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55 assert(noop_null->_idx < nodes_size(), "should be created already"); |
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56 map_ideal_node(noop_null, null_obj); |
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57 } |
4113 | 58 _pcmp_neq = NULL; // Should be initialized |
59 _pcmp_eq = NULL; | |
0 | 60 } |
61 | |
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62 bool ConnectionGraph::has_candidates(Compile *C) { |
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63 // EA brings benefits only when the code has allocations and/or locks which |
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64 // are represented by ideal Macro nodes. |
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65 int cnt = C->macro_count(); |
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66 for( int i=0; i < cnt; i++ ) { |
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67 Node *n = C->macro_node(i); |
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68 if ( n->is_Allocate() ) |
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69 return true; |
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70 if( n->is_Lock() ) { |
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71 Node* obj = n->as_Lock()->obj_node()->uncast(); |
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72 if( !(obj->is_Parm() || obj->is_Con()) ) |
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73 return true; |
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74 } |
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75 } |
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76 return false; |
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77 } |
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78 |
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79 void ConnectionGraph::do_analysis(Compile *C, PhaseIterGVN *igvn) { |
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80 Compile::TracePhase t2("escapeAnalysis", &Phase::_t_escapeAnalysis, true); |
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81 ResourceMark rm; |
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82 |
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83 // Add ConP#NULL and ConN#NULL nodes before ConnectionGraph construction |
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84 // to create space for them in ConnectionGraph::_nodes[]. |
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85 Node* oop_null = igvn->zerocon(T_OBJECT); |
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86 Node* noop_null = igvn->zerocon(T_NARROWOOP); |
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87 ConnectionGraph* congraph = new(C->comp_arena()) ConnectionGraph(C, igvn); |
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88 // Perform escape analysis |
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89 if (congraph->compute_escape()) { |
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90 // There are non escaping objects. |
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91 C->set_congraph(congraph); |
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92 } |
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93 // Cleanup. |
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94 if (oop_null->outcnt() == 0) |
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95 igvn->hash_delete(oop_null); |
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96 if (noop_null->outcnt() == 0) |
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97 igvn->hash_delete(noop_null); |
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98 } |
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99 |
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100 bool ConnectionGraph::compute_escape() { |
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101 Compile* C = _compile; |
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102 PhaseGVN* igvn = _igvn; |
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103 |
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104 // Worklists used by EA. |
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105 Unique_Node_List delayed_worklist; |
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106 GrowableArray<Node*> alloc_worklist; |
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107 GrowableArray<Node*> ptr_cmp_worklist; |
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108 GrowableArray<Node*> storestore_worklist; |
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109 GrowableArray<PointsToNode*> ptnodes_worklist; |
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110 GrowableArray<JavaObjectNode*> java_objects_worklist; |
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111 GrowableArray<JavaObjectNode*> non_escaped_worklist; |
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112 GrowableArray<FieldNode*> oop_fields_worklist; |
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113 DEBUG_ONLY( GrowableArray<Node*> addp_worklist; ) |
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114 |
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115 { Compile::TracePhase t3("connectionGraph", &Phase::_t_connectionGraph, true); |
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116 |
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117 // 1. Populate Connection Graph (CG) with PointsTo nodes. |
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118 ideal_nodes.map(C->unique(), NULL); // preallocate space |
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119 // Initialize worklist |
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120 if (C->root() != NULL) { |
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121 ideal_nodes.push(C->root()); |
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122 } |
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123 for( uint next = 0; next < ideal_nodes.size(); ++next ) { |
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124 Node* n = ideal_nodes.at(next); |
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125 // Create PointsTo nodes and add them to Connection Graph. Called |
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126 // only once per ideal node since ideal_nodes is Unique_Node list. |
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127 add_node_to_connection_graph(n, &delayed_worklist); |
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128 PointsToNode* ptn = ptnode_adr(n->_idx); |
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129 if (ptn != NULL) { |
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130 ptnodes_worklist.append(ptn); |
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131 if (ptn->is_JavaObject()) { |
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132 java_objects_worklist.append(ptn->as_JavaObject()); |
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133 if ((n->is_Allocate() || n->is_CallStaticJava()) && |
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134 (ptn->escape_state() < PointsToNode::GlobalEscape)) { |
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135 // Only allocations and java static calls results are interesting. |
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136 non_escaped_worklist.append(ptn->as_JavaObject()); |
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137 } |
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138 } else if (ptn->is_Field() && ptn->as_Field()->is_oop()) { |
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139 oop_fields_worklist.append(ptn->as_Field()); |
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140 } |
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141 } |
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142 if (n->is_MergeMem()) { |
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143 // Collect all MergeMem nodes to add memory slices for |
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144 // scalar replaceable objects in split_unique_types(). |
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145 _mergemem_worklist.append(n->as_MergeMem()); |
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146 } else if (OptimizePtrCompare && n->is_Cmp() && |
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147 (n->Opcode() == Op_CmpP || n->Opcode() == Op_CmpN)) { |
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148 // Collect compare pointers nodes. |
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149 ptr_cmp_worklist.append(n); |
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150 } else if (n->is_MemBarStoreStore()) { |
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151 // Collect all MemBarStoreStore nodes so that depending on the |
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152 // escape status of the associated Allocate node some of them |
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153 // may be eliminated. |
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154 storestore_worklist.append(n); |
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155 #ifdef ASSERT |
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156 } else if(n->is_AddP()) { |
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157 // Collect address nodes for graph verification. |
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158 addp_worklist.append(n); |
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159 #endif |
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160 } |
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161 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
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162 Node* m = n->fast_out(i); // Get user |
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163 ideal_nodes.push(m); |
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164 } |
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165 } |
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166 if (non_escaped_worklist.length() == 0) { |
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167 _collecting = false; |
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168 return false; // Nothing to do. |
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169 } |
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170 // Add final simple edges to graph. |
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171 while(delayed_worklist.size() > 0) { |
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172 Node* n = delayed_worklist.pop(); |
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173 add_final_edges(n); |
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174 } |
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175 int ptnodes_length = ptnodes_worklist.length(); |
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176 |
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177 #ifdef ASSERT |
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178 if (VerifyConnectionGraph) { |
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179 // Verify that no new simple edges could be created and all |
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180 // local vars has edges. |
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181 _verify = true; |
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182 for (int next = 0; next < ptnodes_length; ++next) { |
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183 PointsToNode* ptn = ptnodes_worklist.at(next); |
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184 add_final_edges(ptn->ideal_node()); |
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185 if (ptn->is_LocalVar() && ptn->edge_count() == 0) { |
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186 ptn->dump(); |
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187 assert(ptn->as_LocalVar()->edge_count() > 0, "sanity"); |
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188 } |
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189 } |
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190 _verify = false; |
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191 } |
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192 #endif |
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193 |
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194 // 2. Finish Graph construction by propagating references to all |
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195 // java objects through graph. |
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196 if (!complete_connection_graph(ptnodes_worklist, non_escaped_worklist, |
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197 java_objects_worklist, oop_fields_worklist)) { |
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198 // All objects escaped or hit time or iterations limits. |
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199 _collecting = false; |
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200 return false; |
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201 } |
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202 |
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203 // 3. Adjust scalar_replaceable state of nonescaping objects and push |
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204 // scalar replaceable allocations on alloc_worklist for processing |
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205 // in split_unique_types(). |
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206 int non_escaped_length = non_escaped_worklist.length(); |
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207 for (int next = 0; next < non_escaped_length; next++) { |
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208 JavaObjectNode* ptn = non_escaped_worklist.at(next); |
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209 if (ptn->escape_state() == PointsToNode::NoEscape && |
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210 ptn->scalar_replaceable()) { |
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211 adjust_scalar_replaceable_state(ptn); |
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212 if (ptn->scalar_replaceable()) { |
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213 alloc_worklist.append(ptn->ideal_node()); |
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214 } |
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215 } |
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216 } |
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217 |
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218 #ifdef ASSERT |
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219 if (VerifyConnectionGraph) { |
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220 // Verify that graph is complete - no new edges could be added or needed. |
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221 verify_connection_graph(ptnodes_worklist, non_escaped_worklist, |
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222 java_objects_worklist, addp_worklist); |
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223 } |
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224 assert(C->unique() == nodes_size(), "no new ideal nodes should be added during ConnectionGraph build"); |
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225 assert(null_obj->escape_state() == PointsToNode::NoEscape && |
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226 null_obj->edge_count() == 0 && |
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227 !null_obj->arraycopy_src() && |
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228 !null_obj->arraycopy_dst(), "sanity"); |
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229 #endif |
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230 |
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231 _collecting = false; |
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232 |
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233 } // TracePhase t3("connectionGraph") |
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234 |
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235 // 4. Optimize ideal graph based on EA information. |
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236 bool has_non_escaping_obj = (non_escaped_worklist.length() > 0); |
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237 if (has_non_escaping_obj) { |
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238 optimize_ideal_graph(ptr_cmp_worklist, storestore_worklist); |
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239 } |
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240 |
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241 #ifndef PRODUCT |
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242 if (PrintEscapeAnalysis) { |
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243 dump(ptnodes_worklist); // Dump ConnectionGraph |
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244 } |
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245 #endif |
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246 |
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247 bool has_scalar_replaceable_candidates = (alloc_worklist.length() > 0); |
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248 #ifdef ASSERT |
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249 if (VerifyConnectionGraph) { |
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250 int alloc_length = alloc_worklist.length(); |
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251 for (int next = 0; next < alloc_length; ++next) { |
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252 Node* n = alloc_worklist.at(next); |
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253 PointsToNode* ptn = ptnode_adr(n->_idx); |
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254 assert(ptn->escape_state() == PointsToNode::NoEscape && ptn->scalar_replaceable(), "sanity"); |
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255 } |
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256 } |
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257 #endif |
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258 |
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259 // 5. Separate memory graph for scalar replaceable allcations. |
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260 if (has_scalar_replaceable_candidates && |
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261 C->AliasLevel() >= 3 && EliminateAllocations) { |
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262 // Now use the escape information to create unique types for |
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263 // scalar replaceable objects. |
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264 split_unique_types(alloc_worklist); |
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265 if (C->failing()) return false; |
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266 C->print_method("After Escape Analysis", 2); |
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267 |
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268 #ifdef ASSERT |
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269 } else if (Verbose && (PrintEscapeAnalysis || PrintEliminateAllocations)) { |
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270 tty->print("=== No allocations eliminated for "); |
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271 C->method()->print_short_name(); |
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272 if(!EliminateAllocations) { |
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273 tty->print(" since EliminateAllocations is off ==="); |
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274 } else if(!has_scalar_replaceable_candidates) { |
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275 tty->print(" since there are no scalar replaceable candidates ==="); |
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276 } else if(C->AliasLevel() < 3) { |
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277 tty->print(" since AliasLevel < 3 ==="); |
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278 } |
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279 tty->cr(); |
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280 #endif |
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281 } |
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282 return has_non_escaping_obj; |
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283 } |
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284 |
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285 // Populate Connection Graph with PointsTo nodes and create simple |
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286 // connection graph edges. |
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287 void ConnectionGraph::add_node_to_connection_graph(Node *n, Unique_Node_List *delayed_worklist) { |
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288 assert(!_verify, "this method sould not be called for verification"); |
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289 PhaseGVN* igvn = _igvn; |
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290 uint n_idx = n->_idx; |
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291 PointsToNode* n_ptn = ptnode_adr(n_idx); |
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292 if (n_ptn != NULL) |
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293 return; // No need to redefine PointsTo node during first iteration. |
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294 |
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295 if (n->is_Call()) { |
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296 // Arguments to allocation and locking don't escape. |
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297 if (n->is_AbstractLock()) { |
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298 // Put Lock and Unlock nodes on IGVN worklist to process them during |
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299 // first IGVN optimization when escape information is still available. |
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300 record_for_optimizer(n); |
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301 } else if (n->is_Allocate()) { |
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302 add_call_node(n->as_Call()); |
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303 record_for_optimizer(n); |
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304 } else { |
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305 if (n->is_CallStaticJava()) { |
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306 const char* name = n->as_CallStaticJava()->_name; |
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307 if (name != NULL && strcmp(name, "uncommon_trap") == 0) |
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308 return; // Skip uncommon traps |
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309 } |
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310 // Don't mark as processed since call's arguments have to be processed. |
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311 delayed_worklist->push(n); |
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312 // Check if a call returns an object. |
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313 if (n->as_Call()->returns_pointer() && |
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314 n->as_Call()->proj_out(TypeFunc::Parms) != NULL) { |
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315 add_call_node(n->as_Call()); |
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316 } |
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317 } |
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318 return; |
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319 } |
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320 // Put this check here to process call arguments since some call nodes |
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321 // point to phantom_obj. |
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322 if (n_ptn == phantom_obj || n_ptn == null_obj) |
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323 return; // Skip predefined nodes. |
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324 |
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325 int opcode = n->Opcode(); |
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326 switch (opcode) { |
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327 case Op_AddP: { |
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328 Node* base = get_addp_base(n); |
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329 PointsToNode* ptn_base = ptnode_adr(base->_idx); |
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330 // Field nodes are created for all field types. They are used in |
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331 // adjust_scalar_replaceable_state() and split_unique_types(). |
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332 // Note, non-oop fields will have only base edges in Connection |
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333 // Graph because such fields are not used for oop loads and stores. |
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334 int offset = address_offset(n, igvn); |
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335 add_field(n, PointsToNode::NoEscape, offset); |
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336 if (ptn_base == NULL) { |
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337 delayed_worklist->push(n); // Process it later. |
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338 } else { |
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339 n_ptn = ptnode_adr(n_idx); |
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340 add_base(n_ptn->as_Field(), ptn_base); |
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341 } |
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342 break; |
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343 } |
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344 case Op_CastX2P: { |
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345 map_ideal_node(n, phantom_obj); |
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346 break; |
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347 } |
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348 case Op_CastPP: |
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349 case Op_CheckCastPP: |
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350 case Op_EncodeP: |
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351 case Op_DecodeN: { |
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352 add_local_var_and_edge(n, PointsToNode::NoEscape, |
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353 n->in(1), delayed_worklist); |
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354 break; |
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355 } |
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356 case Op_CMoveP: { |
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357 add_local_var(n, PointsToNode::NoEscape); |
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358 // Do not add edges during first iteration because some could be |
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359 // not defined yet. |
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360 delayed_worklist->push(n); |
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361 break; |
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362 } |
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363 case Op_ConP: |
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364 case Op_ConN: { |
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365 // assume all oop constants globally escape except for null |
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366 PointsToNode::EscapeState es; |
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367 if (igvn->type(n) == TypePtr::NULL_PTR || |
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368 igvn->type(n) == TypeNarrowOop::NULL_PTR) { |
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369 es = PointsToNode::NoEscape; |
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370 } else { |
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371 es = PointsToNode::GlobalEscape; |
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372 } |
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373 add_java_object(n, es); |
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374 break; |
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375 } |
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376 case Op_CreateEx: { |
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377 // assume that all exception objects globally escape |
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378 add_java_object(n, PointsToNode::GlobalEscape); |
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379 break; |
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380 } |
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381 case Op_LoadKlass: |
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382 case Op_LoadNKlass: { |
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383 // Unknown class is loaded |
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384 map_ideal_node(n, phantom_obj); |
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385 break; |
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386 } |
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387 case Op_LoadP: |
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388 case Op_LoadN: |
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389 case Op_LoadPLocked: { |
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390 // Using isa_ptr() instead of isa_oopptr() for LoadP and Phi because |
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391 // ThreadLocal has RawPrt type. |
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392 const Type* t = igvn->type(n); |
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393 if (t->make_ptr() != NULL) { |
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394 Node* adr = n->in(MemNode::Address); |
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395 #ifdef ASSERT |
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396 if (!adr->is_AddP()) { |
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397 assert(igvn->type(adr)->isa_rawptr(), "sanity"); |
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398 } else { |
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399 assert((ptnode_adr(adr->_idx) == NULL || |
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400 ptnode_adr(adr->_idx)->as_Field()->is_oop()), "sanity"); |
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|
401 } |
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|
402 #endif |
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403 add_local_var_and_edge(n, PointsToNode::NoEscape, |
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|
404 adr, delayed_worklist); |
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|
405 } |
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|
406 break; |
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|
407 } |
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|
408 case Op_Parm: { |
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|
409 map_ideal_node(n, phantom_obj); |
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|
410 break; |
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|
411 } |
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412 case Op_PartialSubtypeCheck: { |
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413 // Produces Null or notNull and is used in only in CmpP so |
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414 // phantom_obj could be used. |
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415 map_ideal_node(n, phantom_obj); // Result is unknown |
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|
416 break; |
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|
417 } |
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418 case Op_Phi: { |
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419 // Using isa_ptr() instead of isa_oopptr() for LoadP and Phi because |
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420 // ThreadLocal has RawPrt type. |
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421 const Type* t = n->as_Phi()->type(); |
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422 if (t->make_ptr() != NULL) { |
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423 add_local_var(n, PointsToNode::NoEscape); |
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424 // Do not add edges during first iteration because some could be |
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425 // not defined yet. |
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426 delayed_worklist->push(n); |
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|
427 } |
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|
428 break; |
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|
429 } |
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|
430 case Op_Proj: { |
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|
431 // we are only interested in the oop result projection from a call |
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432 if (n->as_Proj()->_con == TypeFunc::Parms && n->in(0)->is_Call() && |
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433 n->in(0)->as_Call()->returns_pointer()) { |
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434 add_local_var_and_edge(n, PointsToNode::NoEscape, |
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435 n->in(0), delayed_worklist); |
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|
436 } |
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|
437 break; |
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|
438 } |
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changeset
|
439 case Op_Rethrow: // Exception object escapes |
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|
440 case Op_Return: { |
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441 if (n->req() > TypeFunc::Parms && |
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442 igvn->type(n->in(TypeFunc::Parms))->isa_oopptr()) { |
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443 // Treat Return value as LocalVar with GlobalEscape escape state. |
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444 add_local_var_and_edge(n, PointsToNode::GlobalEscape, |
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445 n->in(TypeFunc::Parms), delayed_worklist); |
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|
446 } |
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|
447 break; |
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|
448 } |
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changeset
|
449 case Op_StoreP: |
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|
450 case Op_StoreN: |
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changeset
|
451 case Op_StorePConditional: |
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changeset
|
452 case Op_CompareAndSwapP: |
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|
453 case Op_CompareAndSwapN: { |
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|
454 Node* adr = n->in(MemNode::Address); |
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|
455 const Type *adr_type = igvn->type(adr); |
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456 adr_type = adr_type->make_ptr(); |
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|
457 if (adr_type->isa_oopptr() || |
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|
458 (opcode == Op_StoreP || opcode == Op_StoreN) && |
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|
459 (adr_type == TypeRawPtr::NOTNULL && |
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|
460 adr->in(AddPNode::Address)->is_Proj() && |
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|
461 adr->in(AddPNode::Address)->in(0)->is_Allocate())) { |
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|
462 delayed_worklist->push(n); // Process it later. |
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changeset
|
463 #ifdef ASSERT |
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|
464 assert(adr->is_AddP(), "expecting an AddP"); |
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|
465 if (adr_type == TypeRawPtr::NOTNULL) { |
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|
466 // Verify a raw address for a store captured by Initialize node. |
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|
467 int offs = (int)igvn->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); |
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|
468 assert(offs != Type::OffsetBot, "offset must be a constant"); |
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|
469 } |
5954
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
470 #endif |
5948
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
471 } else { |
ee138854b3a6
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|
472 // Ignore copy the displaced header to the BoxNode (OSR compilation). |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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changeset
|
473 if (adr->is_BoxLock()) |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
474 break; |
5954
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
475 // Stored value escapes in unsafe access. |
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7154997: assert(false) failed: not G1 barrier raw StoreP
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|
476 if ((opcode == Op_StoreP) && (adr_type == TypeRawPtr::BOTTOM)) { |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
477 // Pointer stores in G1 barriers looks like unsafe access. |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
478 // Ignore such stores to be able scalar replace non-escaping |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
479 // allocations. |
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7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
480 if (UseG1GC && adr->is_AddP()) { |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
481 Node* base = get_addp_base(adr); |
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7154997: assert(false) failed: not G1 barrier raw StoreP
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|
482 if (base->Opcode() == Op_LoadP && |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
483 base->in(MemNode::Address)->is_AddP()) { |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
484 adr = base->in(MemNode::Address); |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
485 Node* tls = get_addp_base(adr); |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
486 if (tls->Opcode() == Op_ThreadLocal) { |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
487 int offs = (int)igvn->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
488 if (offs == in_bytes(JavaThread::satb_mark_queue_offset() + |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
489 PtrQueue::byte_offset_of_buf())) { |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
490 break; // G1 pre barier previous oop value store. |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
491 } |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
492 if (offs == in_bytes(JavaThread::dirty_card_queue_offset() + |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
493 PtrQueue::byte_offset_of_buf())) { |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
494 break; // G1 post barier card address store. |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
495 } |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
496 } |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
497 } |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
498 } |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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changeset
|
499 delayed_worklist->push(n); // Process unsafe access later. |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
kvn
parents:
5948
diff
changeset
|
500 break; |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
501 } |
5954
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
502 #ifdef ASSERT |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
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diff
changeset
|
503 n->dump(1); |
ed4c92f54c2d
7154997: assert(false) failed: not G1 barrier raw StoreP
kvn
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diff
changeset
|
504 assert(false, "not unsafe or G1 barrier raw StoreP"); |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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changeset
|
505 #endif |
ee138854b3a6
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changeset
|
506 } |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
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diff
changeset
|
507 break; |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
508 } |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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diff
changeset
|
509 case Op_AryEq: |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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diff
changeset
|
510 case Op_StrComp: |
ee138854b3a6
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diff
changeset
|
511 case Op_StrEquals: |
ee138854b3a6
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changeset
|
512 case Op_StrIndexOf: { |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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changeset
|
513 add_local_var(n, PointsToNode::ArgEscape); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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changeset
|
514 delayed_worklist->push(n); // Process it later. |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
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diff
changeset
|
515 break; |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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parents:
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diff
changeset
|
516 } |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
517 case Op_ThreadLocal: { |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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changeset
|
518 add_java_object(n, PointsToNode::ArgEscape); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
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diff
changeset
|
519 break; |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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parents:
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diff
changeset
|
520 } |
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521 default: |
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522 ; // Do nothing for nodes not related to EA. |
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|
523 } |
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|
524 return; |
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|
525 } |
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|
526 |
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527 #ifdef ASSERT |
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528 #define ELSE_FAIL(name) \ |
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529 /* Should not be called for not pointer type. */ \ |
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|
530 n->dump(1); \ |
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|
531 assert(false, name); \ |
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|
532 break; |
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|
533 #else |
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534 #define ELSE_FAIL(name) \ |
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|
535 break; |
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|
536 #endif |
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|
537 |
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|
538 // Add final simple edges to graph. |
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|
539 void ConnectionGraph::add_final_edges(Node *n) { |
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540 PointsToNode* n_ptn = ptnode_adr(n->_idx); |
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|
541 #ifdef ASSERT |
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542 if (_verify && n_ptn->is_JavaObject()) |
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543 return; // This method does not change graph for JavaObject. |
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544 #endif |
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545 |
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546 if (n->is_Call()) { |
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547 process_call_arguments(n->as_Call()); |
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548 return; |
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|
549 } |
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550 assert(n->is_Store() || n->is_LoadStore() || |
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551 (n_ptn != NULL) && (n_ptn->ideal_node() != NULL), |
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552 "node should be registered already"); |
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553 int opcode = n->Opcode(); |
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554 switch (opcode) { |
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555 case Op_AddP: { |
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556 Node* base = get_addp_base(n); |
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557 PointsToNode* ptn_base = ptnode_adr(base->_idx); |
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558 assert(ptn_base != NULL, "field's base should be registered"); |
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559 add_base(n_ptn->as_Field(), ptn_base); |
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560 break; |
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|
561 } |
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562 case Op_CastPP: |
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|
563 case Op_CheckCastPP: |
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|
564 case Op_EncodeP: |
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|
565 case Op_DecodeN: { |
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566 add_local_var_and_edge(n, PointsToNode::NoEscape, |
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|
567 n->in(1), NULL); |
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|
568 break; |
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|
569 } |
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570 case Op_CMoveP: { |
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571 for (uint i = CMoveNode::IfFalse; i < n->req(); i++) { |
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572 Node* in = n->in(i); |
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|
573 if (in == NULL) |
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|
574 continue; // ignore NULL |
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|
575 Node* uncast_in = in->uncast(); |
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576 if (uncast_in->is_top() || uncast_in == n) |
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|
577 continue; // ignore top or inputs which go back this node |
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578 PointsToNode* ptn = ptnode_adr(in->_idx); |
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|
579 assert(ptn != NULL, "node should be registered"); |
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|
580 add_edge(n_ptn, ptn); |
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changeset
|
581 } |
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changeset
|
582 break; |
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changeset
|
583 } |
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changeset
|
584 case Op_LoadP: |
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|
585 case Op_LoadN: |
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586 case Op_LoadPLocked: { |
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|
587 // Using isa_ptr() instead of isa_oopptr() for LoadP and Phi because |
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588 // ThreadLocal has RawPrt type. |
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|
589 const Type* t = _igvn->type(n); |
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590 if (t->make_ptr() != NULL) { |
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591 Node* adr = n->in(MemNode::Address); |
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592 add_local_var_and_edge(n, PointsToNode::NoEscape, adr, NULL); |
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|
593 break; |
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|
594 } |
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|
595 ELSE_FAIL("Op_LoadP"); |
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|
596 } |
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|
597 case Op_Phi: { |
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|
598 // Using isa_ptr() instead of isa_oopptr() for LoadP and Phi because |
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|
599 // ThreadLocal has RawPrt type. |
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|
600 const Type* t = n->as_Phi()->type(); |
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601 if (t->make_ptr() != NULL) { |
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|
602 for (uint i = 1; i < n->req(); i++) { |
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|
603 Node* in = n->in(i); |
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|
604 if (in == NULL) |
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|
605 continue; // ignore NULL |
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|
606 Node* uncast_in = in->uncast(); |
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|
607 if (uncast_in->is_top() || uncast_in == n) |
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|
608 continue; // ignore top or inputs which go back this node |
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|
609 PointsToNode* ptn = ptnode_adr(in->_idx); |
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|
610 assert(ptn != NULL, "node should be registered"); |
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|
611 add_edge(n_ptn, ptn); |
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|
612 } |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
613 break; |
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|
614 } |
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changeset
|
615 ELSE_FAIL("Op_Phi"); |
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|
616 } |
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changeset
|
617 case Op_Proj: { |
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|
618 // we are only interested in the oop result projection from a call |
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619 if (n->as_Proj()->_con == TypeFunc::Parms && n->in(0)->is_Call() && |
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620 n->in(0)->as_Call()->returns_pointer()) { |
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621 add_local_var_and_edge(n, PointsToNode::NoEscape, n->in(0), NULL); |
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|
622 break; |
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changeset
|
623 } |
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|
624 ELSE_FAIL("Op_Proj"); |
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|
625 } |
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|
626 case Op_Rethrow: // Exception object escapes |
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|
627 case Op_Return: { |
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628 if (n->req() > TypeFunc::Parms && |
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|
629 _igvn->type(n->in(TypeFunc::Parms))->isa_oopptr()) { |
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|
630 // Treat Return value as LocalVar with GlobalEscape escape state. |
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|
631 add_local_var_and_edge(n, PointsToNode::GlobalEscape, |
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632 n->in(TypeFunc::Parms), NULL); |
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|
633 break; |
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|
634 } |
ee138854b3a6
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|
635 ELSE_FAIL("Op_Return"); |
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changeset
|
636 } |
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changeset
|
637 case Op_StoreP: |
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changeset
|
638 case Op_StoreN: |
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changeset
|
639 case Op_StorePConditional: |
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changeset
|
640 case Op_CompareAndSwapP: |
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|
641 case Op_CompareAndSwapN: { |
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642 Node* adr = n->in(MemNode::Address); |
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|
643 const Type *adr_type = _igvn->type(adr); |
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|
644 adr_type = adr_type->make_ptr(); |
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|
645 if (adr_type->isa_oopptr() || |
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646 (opcode == Op_StoreP || opcode == Op_StoreN) && |
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647 (adr_type == TypeRawPtr::NOTNULL && |
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648 adr->in(AddPNode::Address)->is_Proj() && |
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649 adr->in(AddPNode::Address)->in(0)->is_Allocate())) { |
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|
650 // Point Address to Value |
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|
651 PointsToNode* adr_ptn = ptnode_adr(adr->_idx); |
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|
652 assert(adr_ptn != NULL && |
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|
653 adr_ptn->as_Field()->is_oop(), "node should be registered"); |
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654 Node *val = n->in(MemNode::ValueIn); |
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655 PointsToNode* ptn = ptnode_adr(val->_idx); |
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656 assert(ptn != NULL, "node should be registered"); |
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657 add_edge(adr_ptn, ptn); |
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658 break; |
5954
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659 } else if ((opcode == Op_StoreP) && (adr_type == TypeRawPtr::BOTTOM)) { |
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|
660 // Stored value escapes in unsafe access. |
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|
661 Node *val = n->in(MemNode::ValueIn); |
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|
662 PointsToNode* ptn = ptnode_adr(val->_idx); |
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|
663 assert(ptn != NULL, "node should be registered"); |
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|
664 ptn->set_escape_state(PointsToNode::GlobalEscape); |
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|
665 // Add edge to object for unsafe access with offset. |
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666 PointsToNode* adr_ptn = ptnode_adr(adr->_idx); |
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667 assert(adr_ptn != NULL, "node should be registered"); |
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668 if (adr_ptn->is_Field()) { |
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669 assert(adr_ptn->as_Field()->is_oop(), "should be oop field"); |
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670 add_edge(adr_ptn, ptn); |
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|
671 } |
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672 break; |
5948
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|
673 } |
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|
674 ELSE_FAIL("Op_StoreP"); |
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|
675 } |
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|
676 case Op_AryEq: |
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|
677 case Op_StrComp: |
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|
678 case Op_StrEquals: |
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|
679 case Op_StrIndexOf: { |
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|
680 // char[] arrays passed to string intrinsic do not escape but |
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681 // they are not scalar replaceable. Adjust escape state for them. |
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682 // Start from in(2) edge since in(1) is memory edge. |
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683 for (uint i = 2; i < n->req(); i++) { |
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684 Node* adr = n->in(i); |
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|
685 const Type* at = _igvn->type(adr); |
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686 if (!adr->is_top() && at->isa_ptr()) { |
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|
687 assert(at == Type::TOP || at == TypePtr::NULL_PTR || |
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688 at->isa_ptr() != NULL, "expecting a pointer"); |
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689 if (adr->is_AddP()) { |
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|
690 adr = get_addp_base(adr); |
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|
691 } |
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|
692 PointsToNode* ptn = ptnode_adr(adr->_idx); |
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|
693 assert(ptn != NULL, "node should be registered"); |
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|
694 add_edge(n_ptn, ptn); |
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|
695 } |
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|
696 } |
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|
697 break; |
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|
698 } |
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|
699 default: { |
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|
700 // This method should be called only for EA specific nodes which may |
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|
701 // miss some edges when they were created. |
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|
702 #ifdef ASSERT |
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|
703 n->dump(1); |
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|
704 #endif |
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|
705 guarantee(false, "unknown node"); |
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|
706 } |
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|
707 } |
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|
708 return; |
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|
709 } |
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|
710 |
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|
711 void ConnectionGraph::add_call_node(CallNode* call) { |
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|
712 assert(call->returns_pointer(), "only for call which returns pointer"); |
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|
713 uint call_idx = call->_idx; |
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|
714 if (call->is_Allocate()) { |
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|
715 Node* k = call->in(AllocateNode::KlassNode); |
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|
716 const TypeKlassPtr* kt = k->bottom_type()->isa_klassptr(); |
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|
717 assert(kt != NULL, "TypeKlassPtr required."); |
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|
718 ciKlass* cik = kt->klass(); |
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|
719 PointsToNode::EscapeState es = PointsToNode::NoEscape; |
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|
720 bool scalar_replaceable = true; |
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|
721 if (call->is_AllocateArray()) { |
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|
722 if (!cik->is_array_klass()) { // StressReflectiveCode |
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|
723 es = PointsToNode::GlobalEscape; |
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|
724 } else { |
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|
725 int length = call->in(AllocateNode::ALength)->find_int_con(-1); |
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
726 if (length < 0 || length > EliminateAllocationArraySizeLimit) { |
ee138854b3a6
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|
727 // Not scalar replaceable if the length is not constant or too big. |
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diff
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|
728 scalar_replaceable = false; |
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|
729 } |
ee138854b3a6
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diff
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|
730 } |
ee138854b3a6
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|
731 } else { // Allocate instance |
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|
732 if (cik->is_subclass_of(_compile->env()->Thread_klass()) || |
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|
733 !cik->is_instance_klass() || // StressReflectiveCode |
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|
734 cik->as_instance_klass()->has_finalizer()) { |
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changeset
|
735 es = PointsToNode::GlobalEscape; |
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
736 } |
ee138854b3a6
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|
737 } |
ee138854b3a6
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|
738 add_java_object(call, es); |
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|
739 PointsToNode* ptn = ptnode_adr(call_idx); |
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|
740 if (!scalar_replaceable && ptn->scalar_replaceable()) { |
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|
741 ptn->set_scalar_replaceable(false); |
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|
742 } |
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|
743 } else if (call->is_CallStaticJava()) { |
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changeset
|
744 // Call nodes could be different types: |
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|
745 // |
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|
746 // 1. CallDynamicJavaNode (what happened during call is unknown): |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
747 // |
ee138854b3a6
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|
748 // - mapped to GlobalEscape JavaObject node if oop is returned; |
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
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|
749 // |
ee138854b3a6
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|
750 // - all oop arguments are escaping globally; |
ee138854b3a6
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|
751 // |
ee138854b3a6
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|
752 // 2. CallStaticJavaNode (execute bytecode analysis if possible): |
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
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|
753 // |
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|
754 // - the same as CallDynamicJavaNode if can't do bytecode analysis; |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
755 // |
ee138854b3a6
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|
756 // - mapped to GlobalEscape JavaObject node if unknown oop is returned; |
ee138854b3a6
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changeset
|
757 // - mapped to NoEscape JavaObject node if non-escaping object allocated |
ee138854b3a6
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diff
changeset
|
758 // during call is returned; |
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changeset
|
759 // - mapped to ArgEscape LocalVar node pointed to object arguments |
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|
760 // which are returned and does not escape during call; |
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|
761 // |
ee138854b3a6
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|
762 // - oop arguments escaping status is defined by bytecode analysis; |
ee138854b3a6
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|
763 // |
ee138854b3a6
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changeset
|
764 // For a static call, we know exactly what method is being called. |
ee138854b3a6
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changeset
|
765 // Use bytecode estimator to record whether the call's return value escapes. |
ee138854b3a6
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changeset
|
766 ciMethod* meth = call->as_CallJava()->method(); |
ee138854b3a6
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diff
changeset
|
767 if (meth == NULL) { |
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768 const char* name = call->as_CallStaticJava()->_name; |
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769 assert(strncmp(name, "_multianewarray", 15) == 0, "TODO: add failed case check"); |
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770 // Returns a newly allocated unescaped object. |
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771 add_java_object(call, PointsToNode::NoEscape); |
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772 ptnode_adr(call_idx)->set_scalar_replaceable(false); |
4122
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773 } else { |
5948
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774 BCEscapeAnalyzer* call_analyzer = meth->get_bcea(); |
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|
775 call_analyzer->copy_dependencies(_compile->dependencies()); |
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776 if (call_analyzer->is_return_allocated()) { |
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777 // Returns a newly allocated unescaped object, simply |
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778 // update dependency information. |
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779 // Mark it as NoEscape so that objects referenced by |
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780 // it's fields will be marked as NoEscape at least. |
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781 add_java_object(call, PointsToNode::NoEscape); |
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782 ptnode_adr(call_idx)->set_scalar_replaceable(false); |
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783 } else { |
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|
784 // Determine whether any arguments are returned. |
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785 const TypeTuple* d = call->tf()->domain(); |
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786 bool ret_arg = false; |
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787 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
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788 if (d->field_at(i)->isa_ptr() != NULL && |
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789 call_analyzer->is_arg_returned(i - TypeFunc::Parms)) { |
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790 ret_arg = true; |
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791 break; |
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|
792 } |
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|
793 } |
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794 if (ret_arg) { |
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795 add_local_var(call, PointsToNode::ArgEscape); |
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796 } else { |
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797 // Returns unknown object. |
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|
798 map_ideal_node(call, phantom_obj); |
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|
799 } |
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|
800 } |
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|
801 } |
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802 } else { |
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803 // An other type of call, assume the worst case: |
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804 // returned value is unknown and globally escapes. |
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805 assert(call->Opcode() == Op_CallDynamicJava, "add failed case check"); |
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806 map_ideal_node(call, phantom_obj); |
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|
807 } |
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|
808 } |
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|
809 |
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810 void ConnectionGraph::process_call_arguments(CallNode *call) { |
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811 bool is_arraycopy = false; |
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|
812 switch (call->Opcode()) { |
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|
813 #ifdef ASSERT |
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|
814 case Op_Allocate: |
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|
815 case Op_AllocateArray: |
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|
816 case Op_Lock: |
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|
817 case Op_Unlock: |
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818 assert(false, "should be done already"); |
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|
819 break; |
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|
820 #endif |
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|
821 case Op_CallLeafNoFP: |
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822 is_arraycopy = (call->as_CallLeaf()->_name != NULL && |
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823 strstr(call->as_CallLeaf()->_name, "arraycopy") != 0); |
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|
824 // fall through |
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|
825 case Op_CallLeaf: { |
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|
826 // Stub calls, objects do not escape but they are not scale replaceable. |
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|
827 // Adjust escape state for outgoing arguments. |
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828 const TypeTuple * d = call->tf()->domain(); |
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|
829 bool src_has_oops = false; |
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830 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
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831 const Type* at = d->field_at(i); |
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|
832 Node *arg = call->in(i); |
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833 const Type *aat = _igvn->type(arg); |
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834 if (arg->is_top() || !at->isa_ptr() || !aat->isa_ptr()) |
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|
835 continue; |
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|
836 if (arg->is_AddP()) { |
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|
837 // |
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|
838 // The inline_native_clone() case when the arraycopy stub is called |
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839 // after the allocation before Initialize and CheckCastPP nodes. |
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|
840 // Or normal arraycopy for object arrays case. |
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|
841 // |
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|
842 // Set AddP's base (Allocate) as not scalar replaceable since |
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|
843 // pointer to the base (with offset) is passed as argument. |
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|
844 // |
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|
845 arg = get_addp_base(arg); |
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|
846 } |
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|
847 PointsToNode* arg_ptn = ptnode_adr(arg->_idx); |
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|
848 assert(arg_ptn != NULL, "should be registered"); |
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849 PointsToNode::EscapeState arg_esc = arg_ptn->escape_state(); |
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850 if (is_arraycopy || arg_esc < PointsToNode::ArgEscape) { |
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|
851 assert(aat == Type::TOP || aat == TypePtr::NULL_PTR || |
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852 aat->isa_ptr() != NULL, "expecting an Ptr"); |
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|
853 bool arg_has_oops = aat->isa_oopptr() && |
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|
854 (aat->isa_oopptr()->klass() == NULL || aat->isa_instptr() || |
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|
855 (aat->isa_aryptr() && aat->isa_aryptr()->klass()->is_obj_array_klass())); |
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|
856 if (i == TypeFunc::Parms) { |
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|
857 src_has_oops = arg_has_oops; |
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|
858 } |
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|
859 // |
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|
860 // src or dst could be j.l.Object when other is basic type array: |
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|
861 // |
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862 // arraycopy(char[],0,Object*,0,size); |
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|
863 // arraycopy(Object*,0,char[],0,size); |
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|
864 // |
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|
865 // Don't add edges in such cases. |
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|
866 // |
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|
867 bool arg_is_arraycopy_dest = src_has_oops && is_arraycopy && |
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868 arg_has_oops && (i > TypeFunc::Parms); |
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|
869 #ifdef ASSERT |
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|
870 if (!(is_arraycopy || |
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|
871 call->as_CallLeaf()->_name != NULL && |
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872 (strcmp(call->as_CallLeaf()->_name, "g1_wb_pre") == 0 || |
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873 strcmp(call->as_CallLeaf()->_name, "g1_wb_post") == 0 )) |
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874 ) { |
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|
875 call->dump(); |
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|
876 assert(false, "EA: unexpected CallLeaf"); |
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|
877 } |
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|
878 #endif |
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|
879 // Always process arraycopy's destination object since |
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|
880 // we need to add all possible edges to references in |
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|
881 // source object. |
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882 if (arg_esc >= PointsToNode::ArgEscape && |
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883 !arg_is_arraycopy_dest) { |
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|
884 continue; |
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|
885 } |
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|
886 set_escape_state(arg_ptn, PointsToNode::ArgEscape); |
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887 if (arg_is_arraycopy_dest) { |
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888 Node* src = call->in(TypeFunc::Parms); |
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889 if (src->is_AddP()) { |
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|
890 src = get_addp_base(src); |
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891 } |
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892 PointsToNode* src_ptn = ptnode_adr(src->_idx); |
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893 assert(src_ptn != NULL, "should be registered"); |
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894 if (arg_ptn != src_ptn) { |
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895 // Special arraycopy edge: |
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896 // A destination object's field can't have the source object |
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897 // as base since objects escape states are not related. |
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898 // Only escape state of destination object's fields affects |
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899 // escape state of fields in source object. |
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900 add_arraycopy(call, PointsToNode::ArgEscape, src_ptn, arg_ptn); |
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901 } |
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902 } |
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|
903 } |
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904 } |
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905 break; |
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|
906 } |
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907 case Op_CallStaticJava: { |
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908 // For a static call, we know exactly what method is being called. |
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909 // Use bytecode estimator to record the call's escape affects |
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|
910 #ifdef ASSERT |
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911 const char* name = call->as_CallStaticJava()->_name; |
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912 assert((name == NULL || strcmp(name, "uncommon_trap") != 0), "normal calls only"); |
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913 #endif |
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914 ciMethod* meth = call->as_CallJava()->method(); |
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915 BCEscapeAnalyzer* call_analyzer = (meth !=NULL) ? meth->get_bcea() : NULL; |
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916 // fall-through if not a Java method or no analyzer information |
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917 if (call_analyzer != NULL) { |
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918 PointsToNode* call_ptn = ptnode_adr(call->_idx); |
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919 const TypeTuple* d = call->tf()->domain(); |
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920 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
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921 const Type* at = d->field_at(i); |
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922 int k = i - TypeFunc::Parms; |
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923 Node* arg = call->in(i); |
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924 PointsToNode* arg_ptn = ptnode_adr(arg->_idx); |
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925 if (at->isa_ptr() != NULL && |
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926 call_analyzer->is_arg_returned(k)) { |
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927 // The call returns arguments. |
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928 if (call_ptn != NULL) { // Is call's result used? |
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929 assert(call_ptn->is_LocalVar(), "node should be registered"); |
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930 assert(arg_ptn != NULL, "node should be registered"); |
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931 add_edge(call_ptn, arg_ptn); |
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932 } |
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|
933 } |
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934 if (at->isa_oopptr() != NULL && |
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935 arg_ptn->escape_state() < PointsToNode::GlobalEscape) { |
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936 if (!call_analyzer->is_arg_stack(k)) { |
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937 // The argument global escapes |
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938 set_escape_state(arg_ptn, PointsToNode::GlobalEscape); |
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939 } else { |
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940 set_escape_state(arg_ptn, PointsToNode::ArgEscape); |
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941 if (!call_analyzer->is_arg_local(k)) { |
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942 // The argument itself doesn't escape, but any fields might |
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943 set_fields_escape_state(arg_ptn, PointsToNode::GlobalEscape); |
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|
944 } |
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|
945 } |
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|
946 } |
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|
947 } |
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948 if (call_ptn != NULL && call_ptn->is_LocalVar()) { |
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949 // The call returns arguments. |
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950 assert(call_ptn->edge_count() > 0, "sanity"); |
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951 if (!call_analyzer->is_return_local()) { |
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952 // Returns also unknown object. |
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953 add_edge(call_ptn, phantom_obj); |
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|
954 } |
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|
955 } |
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|
956 break; |
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|
957 } |
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|
958 } |
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|
959 default: { |
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|
960 // Fall-through here if not a Java method or no analyzer information |
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961 // or some other type of call, assume the worst case: all arguments |
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|
962 // globally escape. |
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|
963 const TypeTuple* d = call->tf()->domain(); |
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964 for (uint i = TypeFunc::Parms; i < d->cnt(); i++) { |
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965 const Type* at = d->field_at(i); |
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966 if (at->isa_oopptr() != NULL) { |
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967 Node* arg = call->in(i); |
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968 if (arg->is_AddP()) { |
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969 arg = get_addp_base(arg); |
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|
970 } |
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971 assert(ptnode_adr(arg->_idx) != NULL, "should be defined already"); |
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972 set_escape_state(ptnode_adr(arg->_idx), PointsToNode::GlobalEscape); |
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|
973 } |
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|
974 } |
4122
cc81b9c09bbb
7112478: after 7105605 JRuby bench_define_method_methods.rb fails with NPE
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|
975 } |
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|
976 } |
5948
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|
977 } |
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|
978 |
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979 |
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|
980 // Finish Graph construction. |
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981 bool ConnectionGraph::complete_connection_graph( |
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982 GrowableArray<PointsToNode*>& ptnodes_worklist, |
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983 GrowableArray<JavaObjectNode*>& non_escaped_worklist, |
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984 GrowableArray<JavaObjectNode*>& java_objects_worklist, |
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985 GrowableArray<FieldNode*>& oop_fields_worklist) { |
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986 // Normally only 1-3 passes needed to build Connection Graph depending |
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987 // on graph complexity. Observed 8 passes in jvm2008 compiler.compiler. |
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988 // Set limit to 20 to catch situation when something did go wrong and |
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989 // bailout Escape Analysis. |
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990 // Also limit build time to 30 sec (60 in debug VM). |
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991 #define CG_BUILD_ITER_LIMIT 20 |
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992 #ifdef ASSERT |
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993 #define CG_BUILD_TIME_LIMIT 60.0 |
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994 #else |
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995 #define CG_BUILD_TIME_LIMIT 30.0 |
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996 #endif |
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997 |
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998 // Propagate GlobalEscape and ArgEscape escape states and check that |
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999 // we still have non-escaping objects. The method pushs on _worklist |
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1000 // Field nodes which reference phantom_object. |
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1001 if (!find_non_escaped_objects(ptnodes_worklist, non_escaped_worklist)) { |
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1002 return false; // Nothing to do. |
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1003 } |
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1004 // Now propagate references to all JavaObject nodes. |
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1005 int java_objects_length = java_objects_worklist.length(); |
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1006 elapsedTimer time; |
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1007 int new_edges = 1; |
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1008 int iterations = 0; |
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1009 do { |
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1010 while ((new_edges > 0) && |
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1011 (iterations++ < CG_BUILD_ITER_LIMIT) && |
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1012 (time.seconds() < CG_BUILD_TIME_LIMIT)) { |
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1013 time.start(); |
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1014 new_edges = 0; |
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1015 // Propagate references to phantom_object for nodes pushed on _worklist |
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1016 // by find_non_escaped_objects() and find_field_value(). |
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1017 new_edges += add_java_object_edges(phantom_obj, false); |
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1018 for (int next = 0; next < java_objects_length; ++next) { |
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1019 JavaObjectNode* ptn = java_objects_worklist.at(next); |
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1020 new_edges += add_java_object_edges(ptn, true); |
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1021 } |
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1022 if (new_edges > 0) { |
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1023 // Update escape states on each iteration if graph was updated. |
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1024 if (!find_non_escaped_objects(ptnodes_worklist, non_escaped_worklist)) { |
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1025 return false; // Nothing to do. |
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1026 } |
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1027 } |
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1028 time.stop(); |
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1029 } |
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1030 if ((iterations < CG_BUILD_ITER_LIMIT) && |
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1031 (time.seconds() < CG_BUILD_TIME_LIMIT)) { |
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1032 time.start(); |
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1033 // Find fields which have unknown value. |
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1034 int fields_length = oop_fields_worklist.length(); |
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1035 for (int next = 0; next < fields_length; next++) { |
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1036 FieldNode* field = oop_fields_worklist.at(next); |
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1037 if (field->edge_count() == 0) { |
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1038 new_edges += find_field_value(field); |
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1039 // This code may added new edges to phantom_object. |
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1040 // Need an other cycle to propagate references to phantom_object. |
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1041 } |
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1042 } |
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1043 time.stop(); |
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1044 } else { |
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1045 new_edges = 0; // Bailout |
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1046 } |
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1047 } while (new_edges > 0); |
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1048 |
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1049 // Bailout if passed limits. |
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1050 if ((iterations >= CG_BUILD_ITER_LIMIT) || |
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1051 (time.seconds() >= CG_BUILD_TIME_LIMIT)) { |
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1052 Compile* C = _compile; |
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1053 if (C->log() != NULL) { |
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1054 C->log()->begin_elem("connectionGraph_bailout reason='reached "); |
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1055 C->log()->text("%s", (iterations >= CG_BUILD_ITER_LIMIT) ? "iterations" : "time"); |
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1056 C->log()->end_elem(" limit'"); |
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1057 } |
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1058 assert(false, err_msg("infinite EA connection graph build (%f sec, %d iterations) with %d nodes and worklist size %d", |
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1059 time.seconds(), iterations, nodes_size(), ptnodes_worklist.length())); |
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1060 // Possible infinite build_connection_graph loop, |
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1061 // bailout (no changes to ideal graph were made). |
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1062 return false; |
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1063 } |
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1064 #ifdef ASSERT |
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1065 if (Verbose && PrintEscapeAnalysis) { |
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1066 tty->print_cr("EA: %d iterations to build connection graph with %d nodes and worklist size %d", |
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1067 iterations, nodes_size(), ptnodes_worklist.length()); |
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1068 } |
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1069 #endif |
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1070 |
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1071 #undef CG_BUILD_ITER_LIMIT |
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1072 #undef CG_BUILD_TIME_LIMIT |
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1073 |
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1074 // Find fields initialized by NULL for non-escaping Allocations. |
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1075 int non_escaped_length = non_escaped_worklist.length(); |
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1076 for (int next = 0; next < non_escaped_length; next++) { |
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1077 JavaObjectNode* ptn = non_escaped_worklist.at(next); |
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1078 PointsToNode::EscapeState es = ptn->escape_state(); |
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1079 assert(es <= PointsToNode::ArgEscape, "sanity"); |
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1080 if (es == PointsToNode::NoEscape) { |
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1081 if (find_init_values(ptn, null_obj, _igvn) > 0) { |
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1082 // Adding references to NULL object does not change escape states |
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1083 // since it does not escape. Also no fields are added to NULL object. |
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1084 add_java_object_edges(null_obj, false); |
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1085 } |
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1086 } |
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1087 Node* n = ptn->ideal_node(); |
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1088 if (n->is_Allocate()) { |
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1089 // The object allocated by this Allocate node will never be |
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1090 // seen by an other thread. Mark it so that when it is |
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1091 // expanded no MemBarStoreStore is added. |
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1092 InitializeNode* ini = n->as_Allocate()->initialization(); |
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1093 if (ini != NULL) |
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1094 ini->set_does_not_escape(); |
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1095 } |
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1096 } |
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1097 return true; // Finished graph construction. |
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1098 } |
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1099 |
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1100 // Propagate GlobalEscape and ArgEscape escape states to all nodes |
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1101 // and check that we still have non-escaping java objects. |
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1102 bool ConnectionGraph::find_non_escaped_objects(GrowableArray<PointsToNode*>& ptnodes_worklist, |
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1103 GrowableArray<JavaObjectNode*>& non_escaped_worklist) { |
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1104 GrowableArray<PointsToNode*> escape_worklist; |
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1105 // First, put all nodes with GlobalEscape and ArgEscape states on worklist. |
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1106 int ptnodes_length = ptnodes_worklist.length(); |
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1107 for (int next = 0; next < ptnodes_length; ++next) { |
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1108 PointsToNode* ptn = ptnodes_worklist.at(next); |
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1109 if (ptn->escape_state() >= PointsToNode::ArgEscape || |
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1110 ptn->fields_escape_state() >= PointsToNode::ArgEscape) { |
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1111 escape_worklist.push(ptn); |
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1112 } |
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1113 } |
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1114 // Set escape states to referenced nodes (edges list). |
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1115 while (escape_worklist.length() > 0) { |
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1116 PointsToNode* ptn = escape_worklist.pop(); |
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1117 PointsToNode::EscapeState es = ptn->escape_state(); |
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1118 PointsToNode::EscapeState field_es = ptn->fields_escape_state(); |
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1119 if (ptn->is_Field() && ptn->as_Field()->is_oop() && |
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1120 es >= PointsToNode::ArgEscape) { |
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1121 // GlobalEscape or ArgEscape state of field means it has unknown value. |
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1122 if (add_edge(ptn, phantom_obj)) { |
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1123 // New edge was added |
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1124 add_field_uses_to_worklist(ptn->as_Field()); |
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1125 } |
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1126 } |
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1127 for (EdgeIterator i(ptn); i.has_next(); i.next()) { |
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1128 PointsToNode* e = i.get(); |
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1129 if (e->is_Arraycopy()) { |
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1130 assert(ptn->arraycopy_dst(), "sanity"); |
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1131 // Propagate only fields escape state through arraycopy edge. |
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1132 if (e->fields_escape_state() < field_es) { |
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1133 set_fields_escape_state(e, field_es); |
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1134 escape_worklist.push(e); |
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1135 } |
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1136 } else if (es >= field_es) { |
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1137 // fields_escape_state is also set to 'es' if it is less than 'es'. |
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1138 if (e->escape_state() < es) { |
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1139 set_escape_state(e, es); |
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1140 escape_worklist.push(e); |
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1141 } |
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1142 } else { |
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1143 // Propagate field escape state. |
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1144 bool es_changed = false; |
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1145 if (e->fields_escape_state() < field_es) { |
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1146 set_fields_escape_state(e, field_es); |
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1147 es_changed = true; |
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1148 } |
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1149 if ((e->escape_state() < field_es) && |
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1150 e->is_Field() && ptn->is_JavaObject() && |
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1151 e->as_Field()->is_oop()) { |
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1152 // Change escape state of referenced fileds. |
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1153 set_escape_state(e, field_es); |
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1154 es_changed = true;; |
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1155 } else if (e->escape_state() < es) { |
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1156 set_escape_state(e, es); |
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1157 es_changed = true;; |
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1158 } |
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1159 if (es_changed) { |
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1160 escape_worklist.push(e); |
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1161 } |
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1162 } |
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1163 } |
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1164 } |
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1165 // Remove escaped objects from non_escaped list. |
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1166 for (int next = non_escaped_worklist.length()-1; next >= 0 ; --next) { |
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1167 JavaObjectNode* ptn = non_escaped_worklist.at(next); |
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1168 if (ptn->escape_state() >= PointsToNode::GlobalEscape) { |
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1169 non_escaped_worklist.delete_at(next); |
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1170 } |
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1171 if (ptn->escape_state() == PointsToNode::NoEscape) { |
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1172 // Find fields in non-escaped allocations which have unknown value. |
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1173 find_init_values(ptn, phantom_obj, NULL); |
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1174 } |
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1175 } |
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1176 return (non_escaped_worklist.length() > 0); |
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1177 } |
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1178 |
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1179 // Add all references to JavaObject node by walking over all uses. |
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1180 int ConnectionGraph::add_java_object_edges(JavaObjectNode* jobj, bool populate_worklist) { |
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1181 int new_edges = 0; |
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1182 if (populate_worklist) { |
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1183 // Populate _worklist by uses of jobj's uses. |
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1184 for (UseIterator i(jobj); i.has_next(); i.next()) { |
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1185 PointsToNode* use = i.get(); |
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1186 if (use->is_Arraycopy()) |
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1187 continue; |
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1188 add_uses_to_worklist(use); |
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1189 if (use->is_Field() && use->as_Field()->is_oop()) { |
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1190 // Put on worklist all field's uses (loads) and |
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1191 // related field nodes (same base and offset). |
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1192 add_field_uses_to_worklist(use->as_Field()); |
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1193 } |
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1194 } |
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1195 } |
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1196 while(_worklist.length() > 0) { |
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1197 PointsToNode* use = _worklist.pop(); |
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1198 if (PointsToNode::is_base_use(use)) { |
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1199 // Add reference from jobj to field and from field to jobj (field's base). |
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1200 use = PointsToNode::get_use_node(use)->as_Field(); |
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1201 if (add_base(use->as_Field(), jobj)) { |
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1202 new_edges++; |
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1203 } |
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1204 continue; |
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1205 } |
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1206 assert(!use->is_JavaObject(), "sanity"); |
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1207 if (use->is_Arraycopy()) { |
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1208 if (jobj == null_obj) // NULL object does not have field edges |
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1209 continue; |
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1210 // Added edge from Arraycopy node to arraycopy's source java object |
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1211 if (add_edge(use, jobj)) { |
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1212 jobj->set_arraycopy_src(); |
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1213 new_edges++; |
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1214 } |
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1215 // and stop here. |
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1216 continue; |
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1217 } |
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1218 if (!add_edge(use, jobj)) |
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1219 continue; // No new edge added, there was such edge already. |
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1220 new_edges++; |
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1221 if (use->is_LocalVar()) { |
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1222 add_uses_to_worklist(use); |
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1223 if (use->arraycopy_dst()) { |
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1224 for (EdgeIterator i(use); i.has_next(); i.next()) { |
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1225 PointsToNode* e = i.get(); |
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1226 if (e->is_Arraycopy()) { |
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1227 if (jobj == null_obj) // NULL object does not have field edges |
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1228 continue; |
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1229 // Add edge from arraycopy's destination java object to Arraycopy node. |
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1230 if (add_edge(jobj, e)) { |
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1231 new_edges++; |
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1232 jobj->set_arraycopy_dst(); |
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1233 } |
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1234 } |
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1235 } |
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1236 } |
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1237 } else { |
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1238 // Added new edge to stored in field values. |
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1239 // Put on worklist all field's uses (loads) and |
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1240 // related field nodes (same base and offset). |
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1241 add_field_uses_to_worklist(use->as_Field()); |
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1242 } |
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1243 } |
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1244 return new_edges; |
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1245 } |
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1246 |
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1247 // Put on worklist all related field nodes. |
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1248 void ConnectionGraph::add_field_uses_to_worklist(FieldNode* field) { |
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1249 assert(field->is_oop(), "sanity"); |
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1250 int offset = field->offset(); |
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1251 add_uses_to_worklist(field); |
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1252 // Loop over all bases of this field and push on worklist Field nodes |
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1253 // with the same offset and base (since they may reference the same field). |
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1254 for (BaseIterator i(field); i.has_next(); i.next()) { |
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1255 PointsToNode* base = i.get(); |
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1256 add_fields_to_worklist(field, base); |
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1257 // Check if the base was source object of arraycopy and go over arraycopy's |
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1258 // destination objects since values stored to a field of source object are |
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1259 // accessable by uses (loads) of fields of destination objects. |
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1260 if (base->arraycopy_src()) { |
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1261 for (UseIterator j(base); j.has_next(); j.next()) { |
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1262 PointsToNode* arycp = j.get(); |
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1263 if (arycp->is_Arraycopy()) { |
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1264 for (UseIterator k(arycp); k.has_next(); k.next()) { |
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1265 PointsToNode* abase = k.get(); |
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1266 if (abase->arraycopy_dst() && abase != base) { |
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1267 // Look for the same arracopy reference. |
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1268 add_fields_to_worklist(field, abase); |
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1269 } |
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1270 } |
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1271 } |
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1272 } |
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1273 } |
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1274 } |
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1275 } |
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1276 |
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1277 // Put on worklist all related field nodes. |
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1278 void ConnectionGraph::add_fields_to_worklist(FieldNode* field, PointsToNode* base) { |
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1279 int offset = field->offset(); |
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1280 if (base->is_LocalVar()) { |
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1281 for (UseIterator j(base); j.has_next(); j.next()) { |
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1282 PointsToNode* f = j.get(); |
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1283 if (PointsToNode::is_base_use(f)) { // Field |
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1284 f = PointsToNode::get_use_node(f); |
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1285 if (f == field || !f->as_Field()->is_oop()) |
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1286 continue; |
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1287 int offs = f->as_Field()->offset(); |
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1288 if (offs == offset || offset == Type::OffsetBot || offs == Type::OffsetBot) { |
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1289 add_to_worklist(f); |
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1290 } |
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1291 } |
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1292 } |
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1293 } else { |
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1294 assert(base->is_JavaObject(), "sanity"); |
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1295 if (// Skip phantom_object since it is only used to indicate that |
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1296 // this field's content globally escapes. |
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1297 (base != phantom_obj) && |
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1298 // NULL object node does not have fields. |
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1299 (base != null_obj)) { |
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1300 for (EdgeIterator i(base); i.has_next(); i.next()) { |
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1301 PointsToNode* f = i.get(); |
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1302 // Skip arraycopy edge since store to destination object field |
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1303 // does not update value in source object field. |
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1304 if (f->is_Arraycopy()) { |
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1305 assert(base->arraycopy_dst(), "sanity"); |
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1306 continue; |
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1307 } |
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1308 if (f == field || !f->as_Field()->is_oop()) |
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1309 continue; |
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1310 int offs = f->as_Field()->offset(); |
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1311 if (offs == offset || offset == Type::OffsetBot || offs == Type::OffsetBot) { |
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1312 add_to_worklist(f); |
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1313 } |
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1314 } |
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1315 } |
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1316 } |
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1317 } |
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1318 |
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1319 // Find fields which have unknown value. |
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1320 int ConnectionGraph::find_field_value(FieldNode* field) { |
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1321 // Escaped fields should have init value already. |
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1322 assert(field->escape_state() == PointsToNode::NoEscape, "sanity"); |
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1323 int new_edges = 0; |
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1324 for (BaseIterator i(field); i.has_next(); i.next()) { |
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1325 PointsToNode* base = i.get(); |
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1326 if (base->is_JavaObject()) { |
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1327 // Skip Allocate's fields which will be processed later. |
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1328 if (base->ideal_node()->is_Allocate()) |
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1329 return 0; |
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1330 assert(base == null_obj, "only NULL ptr base expected here"); |
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1331 } |
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1332 } |
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1333 if (add_edge(field, phantom_obj)) { |
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1334 // New edge was added |
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1335 new_edges++; |
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1336 add_field_uses_to_worklist(field); |
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1337 } |
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1338 return new_edges; |
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1339 } |
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1340 |
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1341 // Find fields initializing values for allocations. |
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1342 int ConnectionGraph::find_init_values(JavaObjectNode* pta, PointsToNode* init_val, PhaseTransform* phase) { |
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1343 assert(pta->escape_state() == PointsToNode::NoEscape, "Not escaped Allocate nodes only"); |
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1344 int new_edges = 0; |
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1345 Node* alloc = pta->ideal_node(); |
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1346 if (init_val == phantom_obj) { |
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1347 // Do nothing for Allocate nodes since its fields values are "known". |
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1348 if (alloc->is_Allocate()) |
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1349 return 0; |
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1350 assert(alloc->as_CallStaticJava(), "sanity"); |
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1351 #ifdef ASSERT |
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1352 if (alloc->as_CallStaticJava()->method() == NULL) { |
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1353 const char* name = alloc->as_CallStaticJava()->_name; |
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1354 assert(strncmp(name, "_multianewarray", 15) == 0, "sanity"); |
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1355 } |
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1356 #endif |
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1357 // Non-escaped allocation returned from Java or runtime call have |
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1358 // unknown values in fields. |
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1359 for (EdgeIterator i(pta); i.has_next(); i.next()) { |
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1360 PointsToNode* ptn = i.get(); |
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1361 if (ptn->is_Field() && ptn->as_Field()->is_oop()) { |
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1362 if (add_edge(ptn, phantom_obj)) { |
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1363 // New edge was added |
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1364 new_edges++; |
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1365 add_field_uses_to_worklist(ptn->as_Field()); |
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1366 } |
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1367 } |
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1368 } |
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1369 return new_edges; |
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1370 } |
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1371 assert(init_val == null_obj, "sanity"); |
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1372 // Do nothing for Call nodes since its fields values are unknown. |
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1373 if (!alloc->is_Allocate()) |
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1374 return 0; |
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1375 |
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1376 InitializeNode* ini = alloc->as_Allocate()->initialization(); |
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1377 Compile* C = _compile; |
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1378 bool visited_bottom_offset = false; |
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1379 GrowableArray<int> offsets_worklist; |
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1380 |
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1381 // Check if an oop field's initializing value is recorded and add |
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1382 // a corresponding NULL if field's value if it is not recorded. |
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1383 // Connection Graph does not record a default initialization by NULL |
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1384 // captured by Initialize node. |
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1385 // |
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1386 for (EdgeIterator i(pta); i.has_next(); i.next()) { |
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1387 PointsToNode* ptn = i.get(); // Field (AddP) |
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1388 if (!ptn->is_Field() || !ptn->as_Field()->is_oop()) |
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1389 continue; // Not oop field |
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1390 int offset = ptn->as_Field()->offset(); |
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1391 if (offset == Type::OffsetBot) { |
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1392 if (!visited_bottom_offset) { |
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1393 // OffsetBot is used to reference array's element, |
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1394 // always add reference to NULL to all Field nodes since we don't |
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1395 // known which element is referenced. |
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1396 if (add_edge(ptn, null_obj)) { |
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1397 // New edge was added |
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1398 new_edges++; |
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1399 add_field_uses_to_worklist(ptn->as_Field()); |
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1400 visited_bottom_offset = true; |
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1401 } |
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1402 } |
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1403 } else { |
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1404 // Check only oop fields. |
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1405 const Type* adr_type = ptn->ideal_node()->as_AddP()->bottom_type(); |
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1406 if (adr_type->isa_rawptr()) { |
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1407 #ifdef ASSERT |
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1408 // Raw pointers are used for initializing stores so skip it |
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1409 // since it should be recorded already |
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1410 Node* base = get_addp_base(ptn->ideal_node()); |
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1411 assert(adr_type->isa_rawptr() && base->is_Proj() && |
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1412 (base->in(0) == alloc),"unexpected pointer type"); |
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1413 #endif |
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1414 continue; |
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|
1415 } |
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1416 if (!offsets_worklist.contains(offset)) { |
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1417 offsets_worklist.append(offset); |
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1418 Node* value = NULL; |
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1419 if (ini != NULL) { |
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1420 BasicType ft = UseCompressedOops ? T_NARROWOOP : T_OBJECT; |
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1421 Node* store = ini->find_captured_store(offset, type2aelembytes(ft), phase); |
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1422 if (store != NULL && store->is_Store()) { |
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1423 value = store->in(MemNode::ValueIn); |
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1424 } else { |
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1425 // There could be initializing stores which follow allocation. |
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1426 // For example, a volatile field store is not collected |
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1427 // by Initialize node. |
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1428 // |
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1429 // Need to check for dependent loads to separate such stores from |
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1430 // stores which follow loads. For now, add initial value NULL so |
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1431 // that compare pointers optimization works correctly. |
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1432 } |
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1433 } |
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1434 if (value == NULL) { |
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1435 // A field's initializing value was not recorded. Add NULL. |
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1436 if (add_edge(ptn, null_obj)) { |
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1437 // New edge was added |
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1438 new_edges++; |
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1439 add_field_uses_to_worklist(ptn->as_Field()); |
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1440 } |
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|
1441 } |
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|
1442 } |
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1443 } |
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|
1444 } |
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1445 return new_edges; |
0 | 1446 } |
1447 | |
5948
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|
1448 // Adjust scalar_replaceable state after Connection Graph is built. |
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1449 void ConnectionGraph::adjust_scalar_replaceable_state(JavaObjectNode* jobj) { |
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1450 // Search for non-escaping objects which are not scalar replaceable |
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1451 // and mark them to propagate the state to referenced objects. |
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|
1452 |
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1453 // 1. An object is not scalar replaceable if the field into which it is |
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1454 // stored has unknown offset (stored into unknown element of an array). |
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1455 // |
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1456 for (UseIterator i(jobj); i.has_next(); i.next()) { |
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1457 PointsToNode* use = i.get(); |
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1458 assert(!use->is_Arraycopy(), "sanity"); |
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1459 if (use->is_Field()) { |
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1460 FieldNode* field = use->as_Field(); |
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|
1461 assert(field->is_oop() && field->scalar_replaceable() && |
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1462 field->fields_escape_state() == PointsToNode::NoEscape, "sanity"); |
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1463 if (field->offset() == Type::OffsetBot) { |
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1464 jobj->set_scalar_replaceable(false); |
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1465 return; |
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|
1466 } |
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|
1467 } |
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1468 assert(use->is_Field() || use->is_LocalVar(), "sanity"); |
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1469 // 2. An object is not scalar replaceable if it is merged with other objects. |
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1470 for (EdgeIterator j(use); j.has_next(); j.next()) { |
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1471 PointsToNode* ptn = j.get(); |
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1472 if (ptn->is_JavaObject() && ptn != jobj) { |
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1473 // Mark all objects. |
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1474 jobj->set_scalar_replaceable(false); |
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1475 ptn->set_scalar_replaceable(false); |
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1476 } |
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1477 } |
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1478 if (!jobj->scalar_replaceable()) { |
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1479 return; |
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|
1480 } |
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|
1481 } |
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1482 |
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1483 for (EdgeIterator j(jobj); j.has_next(); j.next()) { |
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1484 // Non-escaping object node should point only to field nodes. |
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1485 FieldNode* field = j.get()->as_Field(); |
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1486 int offset = field->as_Field()->offset(); |
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|
1487 |
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1488 // 3. An object is not scalar replaceable if it has a field with unknown |
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1489 // offset (array's element is accessed in loop). |
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1490 if (offset == Type::OffsetBot) { |
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1491 jobj->set_scalar_replaceable(false); |
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|
1492 return; |
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|
1493 } |
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1494 // 4. Currently an object is not scalar replaceable if a LoadStore node |
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1495 // access its field since the field value is unknown after it. |
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|
1496 // |
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1497 Node* n = field->ideal_node(); |
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1498 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
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1499 if (n->fast_out(i)->is_LoadStore()) { |
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1500 jobj->set_scalar_replaceable(false); |
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|
1501 return; |
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|
1502 } |
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1503 } |
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1504 |
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1505 // 5. Or the address may point to more then one object. This may produce |
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1506 // the false positive result (set not scalar replaceable) |
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1507 // since the flow-insensitive escape analysis can't separate |
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1508 // the case when stores overwrite the field's value from the case |
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1509 // when stores happened on different control branches. |
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1510 // |
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1511 // Note: it will disable scalar replacement in some cases: |
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1512 // |
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1513 // Point p[] = new Point[1]; |
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1514 // p[0] = new Point(); // Will be not scalar replaced |
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1515 // |
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1516 // but it will save us from incorrect optimizations in next cases: |
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1517 // |
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1518 // Point p[] = new Point[1]; |
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1519 // if ( x ) p[0] = new Point(); // Will be not scalar replaced |
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1520 // |
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1521 if (field->base_count() > 1) { |
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1522 for (BaseIterator i(field); i.has_next(); i.next()) { |
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1523 PointsToNode* base = i.get(); |
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1524 // Don't take into account LocalVar nodes which |
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1525 // may point to only one object which should be also |
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1526 // this field's base by now. |
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1527 if (base->is_JavaObject() && base != jobj) { |
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1528 // Mark all bases. |
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1529 jobj->set_scalar_replaceable(false); |
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1530 base->set_scalar_replaceable(false); |
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1531 } |
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1532 } |
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1533 } |
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1534 } |
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1535 } |
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1536 |
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1537 #ifdef ASSERT |
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1538 void ConnectionGraph::verify_connection_graph( |
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1539 GrowableArray<PointsToNode*>& ptnodes_worklist, |
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1540 GrowableArray<JavaObjectNode*>& non_escaped_worklist, |
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1541 GrowableArray<JavaObjectNode*>& java_objects_worklist, |
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1542 GrowableArray<Node*>& addp_worklist) { |
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1543 // Verify that graph is complete - no new edges could be added. |
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1544 int java_objects_length = java_objects_worklist.length(); |
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1545 int non_escaped_length = non_escaped_worklist.length(); |
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1546 int new_edges = 0; |
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1547 for (int next = 0; next < java_objects_length; ++next) { |
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1548 JavaObjectNode* ptn = java_objects_worklist.at(next); |
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1549 new_edges += add_java_object_edges(ptn, true); |
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1550 } |
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1551 assert(new_edges == 0, "graph was not complete"); |
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1552 // Verify that escape state is final. |
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1553 int length = non_escaped_worklist.length(); |
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1554 find_non_escaped_objects(ptnodes_worklist, non_escaped_worklist); |
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1555 assert((non_escaped_length == non_escaped_worklist.length()) && |
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1556 (non_escaped_length == length) && |
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1557 (_worklist.length() == 0), "escape state was not final"); |
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1558 |
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1559 // Verify fields information. |
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1560 int addp_length = addp_worklist.length(); |
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1561 for (int next = 0; next < addp_length; ++next ) { |
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1562 Node* n = addp_worklist.at(next); |
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1563 FieldNode* field = ptnode_adr(n->_idx)->as_Field(); |
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1564 if (field->is_oop()) { |
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1565 // Verify that field has all bases |
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1566 Node* base = get_addp_base(n); |
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1567 PointsToNode* ptn = ptnode_adr(base->_idx); |
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1568 if (ptn->is_JavaObject()) { |
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1569 assert(field->has_base(ptn->as_JavaObject()), "sanity"); |
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1570 } else { |
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1571 assert(ptn->is_LocalVar(), "sanity"); |
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1572 for (EdgeIterator i(ptn); i.has_next(); i.next()) { |
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1573 PointsToNode* e = i.get(); |
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1574 if (e->is_JavaObject()) { |
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1575 assert(field->has_base(e->as_JavaObject()), "sanity"); |
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1576 } |
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1577 } |
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1578 } |
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1579 // Verify that all fields have initializing values. |
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1580 if (field->edge_count() == 0) { |
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1581 field->dump(); |
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1582 assert(field->edge_count() > 0, "sanity"); |
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1583 } |
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1584 } |
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1585 } |
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1586 } |
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1587 #endif |
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1588 |
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1589 // Optimize ideal graph. |
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1590 void ConnectionGraph::optimize_ideal_graph(GrowableArray<Node*>& ptr_cmp_worklist, |
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1591 GrowableArray<Node*>& storestore_worklist) { |
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1592 Compile* C = _compile; |
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1593 PhaseIterGVN* igvn = _igvn; |
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1594 if (EliminateLocks) { |
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1595 // Mark locks before changing ideal graph. |
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1596 int cnt = C->macro_count(); |
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1597 for( int i=0; i < cnt; i++ ) { |
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1598 Node *n = C->macro_node(i); |
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1599 if (n->is_AbstractLock()) { // Lock and Unlock nodes |
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1600 AbstractLockNode* alock = n->as_AbstractLock(); |
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1601 if (!alock->is_non_esc_obj()) { |
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1602 if (not_global_escape(alock->obj_node())) { |
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1603 assert(!alock->is_eliminated() || alock->is_coarsened(), "sanity"); |
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1604 // The lock could be marked eliminated by lock coarsening |
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1605 // code during first IGVN before EA. Replace coarsened flag |
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1606 // to eliminate all associated locks/unlocks. |
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1607 alock->set_non_esc_obj(); |
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1608 } |
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1609 } |
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1610 } |
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1611 } |
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1612 } |
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1613 |
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1614 if (OptimizePtrCompare) { |
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1615 // Add ConI(#CC_GT) and ConI(#CC_EQ). |
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1616 _pcmp_neq = igvn->makecon(TypeInt::CC_GT); |
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1617 _pcmp_eq = igvn->makecon(TypeInt::CC_EQ); |
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1618 // Optimize objects compare. |
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1619 while (ptr_cmp_worklist.length() != 0) { |
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1620 Node *n = ptr_cmp_worklist.pop(); |
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1621 Node *res = optimize_ptr_compare(n); |
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1622 if (res != NULL) { |
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1623 #ifndef PRODUCT |
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|
1624 if (PrintOptimizePtrCompare) { |
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1625 tty->print_cr("++++ Replaced: %d %s(%d,%d) --> %s", n->_idx, (n->Opcode() == Op_CmpP ? "CmpP" : "CmpN"), n->in(1)->_idx, n->in(2)->_idx, (res == _pcmp_eq ? "EQ" : "NotEQ")); |
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|
1626 if (Verbose) { |
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|
1627 n->dump(1); |
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|
1628 } |
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|
1629 } |
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|
1630 #endif |
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|
1631 igvn->replace_node(n, res); |
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|
1632 } |
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|
1633 } |
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|
1634 // cleanup |
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|
1635 if (_pcmp_neq->outcnt() == 0) |
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1636 igvn->hash_delete(_pcmp_neq); |
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1637 if (_pcmp_eq->outcnt() == 0) |
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|
1638 igvn->hash_delete(_pcmp_eq); |
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|
1639 } |
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|
1640 |
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|
1641 // For MemBarStoreStore nodes added in library_call.cpp, check |
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|
1642 // escape status of associated AllocateNode and optimize out |
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|
1643 // MemBarStoreStore node if the allocated object never escapes. |
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1644 while (storestore_worklist.length() != 0) { |
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|
1645 Node *n = storestore_worklist.pop(); |
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1646 MemBarStoreStoreNode *storestore = n ->as_MemBarStoreStore(); |
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1647 Node *alloc = storestore->in(MemBarNode::Precedent)->in(0); |
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1648 assert (alloc->is_Allocate(), "storestore should point to AllocateNode"); |
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1649 if (not_global_escape(alloc)) { |
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1650 MemBarNode* mb = MemBarNode::make(C, Op_MemBarCPUOrder, Compile::AliasIdxBot); |
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|
1651 mb->init_req(TypeFunc::Memory, storestore->in(TypeFunc::Memory)); |
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1652 mb->init_req(TypeFunc::Control, storestore->in(TypeFunc::Control)); |
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|
1653 igvn->register_new_node_with_optimizer(mb); |
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1654 igvn->replace_node(storestore, mb); |
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|
1655 } |
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|
1656 } |
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|
1657 } |
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|
1658 |
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|
1659 // Optimize objects compare. |
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|
1660 Node* ConnectionGraph::optimize_ptr_compare(Node* n) { |
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|
1661 assert(OptimizePtrCompare, "sanity"); |
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|
1662 PointsToNode* ptn1 = ptnode_adr(n->in(1)->_idx); |
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1663 PointsToNode* ptn2 = ptnode_adr(n->in(2)->_idx); |
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|
1664 JavaObjectNode* jobj1 = unique_java_object(n->in(1)); |
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|
1665 JavaObjectNode* jobj2 = unique_java_object(n->in(2)); |
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|
1666 assert(ptn1->is_JavaObject() || ptn1->is_LocalVar(), "sanity"); |
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|
1667 assert(ptn2->is_JavaObject() || ptn2->is_LocalVar(), "sanity"); |
0 | 1668 |
5948
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|
1669 // Check simple cases first. |
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|
1670 if (jobj1 != NULL) { |
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1671 if (jobj1->escape_state() == PointsToNode::NoEscape) { |
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|
1672 if (jobj1 == jobj2) { |
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|
1673 // Comparing the same not escaping object. |
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|
1674 return _pcmp_eq; |
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|
1675 } |
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|
1676 Node* obj = jobj1->ideal_node(); |
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|
1677 // Comparing not escaping allocation. |
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|
1678 if ((obj->is_Allocate() || obj->is_CallStaticJava()) && |
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|
1679 !ptn2->points_to(jobj1)) { |
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|
1680 return _pcmp_neq; // This includes nullness check. |
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|
1681 } |
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|
1682 } |
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|
1683 } |
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|
1684 if (jobj2 != NULL) { |
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|
1685 if (jobj2->escape_state() == PointsToNode::NoEscape) { |
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|
1686 Node* obj = jobj2->ideal_node(); |
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|
1687 // Comparing not escaping allocation. |
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|
1688 if ((obj->is_Allocate() || obj->is_CallStaticJava()) && |
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|
1689 !ptn1->points_to(jobj2)) { |
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|
1690 return _pcmp_neq; // This includes nullness check. |
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|
1691 } |
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|
1692 } |
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|
1693 } |
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|
1694 if (jobj1 != NULL && jobj1 != phantom_obj && |
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|
1695 jobj2 != NULL && jobj2 != phantom_obj && |
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|
1696 jobj1->ideal_node()->is_Con() && |
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|
1697 jobj2->ideal_node()->is_Con()) { |
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|
1698 // Klass or String constants compare. Need to be careful with |
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|
1699 // compressed pointers - compare types of ConN and ConP instead of nodes. |
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|
1700 const Type* t1 = jobj1->ideal_node()->bottom_type()->make_ptr(); |
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|
1701 const Type* t2 = jobj2->ideal_node()->bottom_type()->make_ptr(); |
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|
1702 assert(t1 != NULL && t2 != NULL, "sanity"); |
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|
1703 if (t1->make_ptr() == t2->make_ptr()) { |
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|
1704 return _pcmp_eq; |
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|
1705 } else { |
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|
1706 return _pcmp_neq; |
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|
1707 } |
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|
1708 } |
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|
1709 if (ptn1->meet(ptn2)) { |
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|
1710 return NULL; // Sets are not disjoint |
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|
1711 } |
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|
1712 |
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|
1713 // Sets are disjoint. |
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|
1714 bool set1_has_unknown_ptr = ptn1->points_to(phantom_obj); |
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|
1715 bool set2_has_unknown_ptr = ptn2->points_to(phantom_obj); |
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|
1716 bool set1_has_null_ptr = ptn1->points_to(null_obj); |
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|
1717 bool set2_has_null_ptr = ptn2->points_to(null_obj); |
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|
1718 if (set1_has_unknown_ptr && set2_has_null_ptr || |
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|
1719 set2_has_unknown_ptr && set1_has_null_ptr) { |
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|
1720 // Check nullness of unknown object. |
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|
1721 return NULL; |
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|
1722 } |
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|
1723 |
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|
1724 // Disjointness by itself is not sufficient since |
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|
1725 // alias analysis is not complete for escaped objects. |
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|
1726 // Disjoint sets are definitely unrelated only when |
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|
1727 // at least one set has only not escaping allocations. |
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|
1728 if (!set1_has_unknown_ptr && !set1_has_null_ptr) { |
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|
1729 if (ptn1->non_escaping_allocation()) { |
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|
1730 return _pcmp_neq; |
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|
1731 } |
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|
1732 } |
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|
1733 if (!set2_has_unknown_ptr && !set2_has_null_ptr) { |
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|
1734 if (ptn2->non_escaping_allocation()) { |
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|
1735 return _pcmp_neq; |
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|
1736 } |
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|
1737 } |
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|
1738 return NULL; |
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|
1739 } |
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|
1740 |
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|
1741 // Connection Graph constuction functions. |
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|
1742 |
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|
1743 void ConnectionGraph::add_local_var(Node *n, PointsToNode::EscapeState es) { |
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|
1744 PointsToNode* ptadr = _nodes.at(n->_idx); |
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1745 if (ptadr != NULL) { |
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1746 assert(ptadr->is_LocalVar() && ptadr->ideal_node() == n, "sanity"); |
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1747 return; |
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1748 } |
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1749 Compile* C = _compile; |
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1750 ptadr = new (C->comp_arena()) LocalVarNode(C, n, es); |
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1751 _nodes.at_put(n->_idx, ptadr); |
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1752 } |
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1753 |
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1754 void ConnectionGraph::add_java_object(Node *n, PointsToNode::EscapeState es) { |
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1755 PointsToNode* ptadr = _nodes.at(n->_idx); |
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1756 if (ptadr != NULL) { |
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1757 assert(ptadr->is_JavaObject() && ptadr->ideal_node() == n, "sanity"); |
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1758 return; |
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1759 } |
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1760 Compile* C = _compile; |
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1761 ptadr = new (C->comp_arena()) JavaObjectNode(C, n, es); |
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1762 _nodes.at_put(n->_idx, ptadr); |
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1763 } |
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1764 |
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1765 void ConnectionGraph::add_field(Node *n, PointsToNode::EscapeState es, int offset) { |
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1766 PointsToNode* ptadr = _nodes.at(n->_idx); |
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1767 if (ptadr != NULL) { |
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1768 assert(ptadr->is_Field() && ptadr->ideal_node() == n, "sanity"); |
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1769 return; |
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1770 } |
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1771 Compile* C = _compile; |
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1772 bool is_oop = is_oop_field(n, offset); |
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1773 FieldNode* field = new (C->comp_arena()) FieldNode(C, n, es, offset, is_oop); |
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1774 _nodes.at_put(n->_idx, field); |
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1775 } |
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1776 |
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1777 void ConnectionGraph::add_arraycopy(Node *n, PointsToNode::EscapeState es, |
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1778 PointsToNode* src, PointsToNode* dst) { |
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1779 assert(!src->is_Field() && !dst->is_Field(), "only for JavaObject and LocalVar"); |
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1780 assert((src != null_obj) && (dst != null_obj), "not for ConP NULL"); |
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1781 PointsToNode* ptadr = _nodes.at(n->_idx); |
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1782 if (ptadr != NULL) { |
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1783 assert(ptadr->is_Arraycopy() && ptadr->ideal_node() == n, "sanity"); |
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1784 return; |
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1785 } |
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1786 Compile* C = _compile; |
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1787 ptadr = new (C->comp_arena()) ArraycopyNode(C, n, es); |
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1788 _nodes.at_put(n->_idx, ptadr); |
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1789 // Add edge from arraycopy node to source object. |
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1790 (void)add_edge(ptadr, src); |
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1791 src->set_arraycopy_src(); |
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1792 // Add edge from destination object to arraycopy node. |
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1793 (void)add_edge(dst, ptadr); |
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1794 dst->set_arraycopy_dst(); |
0 | 1795 } |
1796 | |
5948
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1797 bool ConnectionGraph::is_oop_field(Node* n, int offset) { |
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1798 const Type* adr_type = n->as_AddP()->bottom_type(); |
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1799 BasicType bt = T_INT; |
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1800 if (offset == Type::OffsetBot) { |
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1801 // Check only oop fields. |
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1802 if (!adr_type->isa_aryptr() || |
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1803 (adr_type->isa_aryptr()->klass() == NULL) || |
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1804 adr_type->isa_aryptr()->klass()->is_obj_array_klass()) { |
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1805 // OffsetBot is used to reference array's element. Ignore first AddP. |
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1806 if (find_second_addp(n, n->in(AddPNode::Base)) == NULL) { |
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1807 bt = T_OBJECT; |
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1808 } |
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1809 } |
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1810 } else if (offset != oopDesc::klass_offset_in_bytes()) { |
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1811 if (adr_type->isa_instptr()) { |
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1812 ciField* field = _compile->alias_type(adr_type->isa_instptr())->field(); |
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1813 if (field != NULL) { |
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1814 bt = field->layout_type(); |
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1815 } else { |
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1816 // Ignore non field load (for example, klass load) |
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1817 } |
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1818 } else if (adr_type->isa_aryptr()) { |
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1819 if (offset == arrayOopDesc::length_offset_in_bytes()) { |
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1820 // Ignore array length load. |
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1821 } else if (find_second_addp(n, n->in(AddPNode::Base)) != NULL) { |
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1822 // Ignore first AddP. |
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1823 } else { |
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1824 const Type* elemtype = adr_type->isa_aryptr()->elem(); |
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1825 bt = elemtype->array_element_basic_type(); |
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1826 } |
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1827 } else if (adr_type->isa_rawptr() || adr_type->isa_klassptr()) { |
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1828 // Allocation initialization, ThreadLocal field access, unsafe access |
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1829 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
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1830 int opcode = n->fast_out(i)->Opcode(); |
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1831 if (opcode == Op_StoreP || opcode == Op_LoadP || |
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1832 opcode == Op_StoreN || opcode == Op_LoadN) { |
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|
1833 bt = T_OBJECT; |
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1834 } |
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|
1835 } |
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1836 } |
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|
1837 } |
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1838 return (bt == T_OBJECT || bt == T_NARROWOOP || bt == T_ARRAY); |
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1839 } |
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1840 |
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1841 // Returns unique pointed java object or NULL. |
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1842 JavaObjectNode* ConnectionGraph::unique_java_object(Node *n) { |
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1843 assert(!_collecting, "should not call when contructed graph"); |
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1844 // If the node was created after the escape computation we can't answer. |
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1845 uint idx = n->_idx; |
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1846 if (idx >= nodes_size()) { |
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1847 return NULL; |
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|
1848 } |
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1849 PointsToNode* ptn = ptnode_adr(idx); |
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1850 if (ptn->is_JavaObject()) { |
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1851 return ptn->as_JavaObject(); |
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1852 } |
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|
1853 assert(ptn->is_LocalVar(), "sanity"); |
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1854 // Check all java objects it points to. |
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1855 JavaObjectNode* jobj = NULL; |
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1856 for (EdgeIterator i(ptn); i.has_next(); i.next()) { |
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1857 PointsToNode* e = i.get(); |
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1858 if (e->is_JavaObject()) { |
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1859 if (jobj == NULL) { |
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1860 jobj = e->as_JavaObject(); |
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1861 } else if (jobj != e) { |
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1862 return NULL; |
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1863 } |
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1864 } |
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1865 } |
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1866 return jobj; |
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1867 } |
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1868 |
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1869 // Return true if this node points only to non-escaping allocations. |
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1870 bool PointsToNode::non_escaping_allocation() { |
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1871 if (is_JavaObject()) { |
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1872 Node* n = ideal_node(); |
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1873 if (n->is_Allocate() || n->is_CallStaticJava()) { |
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1874 return (escape_state() == PointsToNode::NoEscape); |
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1875 } else { |
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1876 return false; |
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1877 } |
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1878 } |
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1879 assert(is_LocalVar(), "sanity"); |
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1880 // Check all java objects it points to. |
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1881 for (EdgeIterator i(this); i.has_next(); i.next()) { |
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1882 PointsToNode* e = i.get(); |
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1883 if (e->is_JavaObject()) { |
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1884 Node* n = e->ideal_node(); |
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1885 if ((e->escape_state() != PointsToNode::NoEscape) || |
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1886 !(n->is_Allocate() || n->is_CallStaticJava())) { |
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1887 return false; |
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1888 } |
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1889 } |
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1890 } |
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1891 return true; |
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1892 } |
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1893 |
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1894 // Return true if we know the node does not escape globally. |
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1895 bool ConnectionGraph::not_global_escape(Node *n) { |
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1896 assert(!_collecting, "should not call during graph construction"); |
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1897 // If the node was created after the escape computation we can't answer. |
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1898 uint idx = n->_idx; |
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1899 if (idx >= nodes_size()) { |
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1900 return false; |
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1901 } |
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1902 PointsToNode* ptn = ptnode_adr(idx); |
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1903 PointsToNode::EscapeState es = ptn->escape_state(); |
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1904 // If we have already computed a value, return it. |
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1905 if (es >= PointsToNode::GlobalEscape) |
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1906 return false; |
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1907 if (ptn->is_JavaObject()) { |
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1908 return true; // (es < PointsToNode::GlobalEscape); |
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1909 } |
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1910 assert(ptn->is_LocalVar(), "sanity"); |
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1911 // Check all java objects it points to. |
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1912 for (EdgeIterator i(ptn); i.has_next(); i.next()) { |
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1913 if (i.get()->escape_state() >= PointsToNode::GlobalEscape) |
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1914 return false; |
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1915 } |
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1916 return true; |
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1917 } |
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1918 |
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1919 |
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1920 // Helper functions |
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1921 |
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1922 // Return true if this node points to specified node or nodes it points to. |
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1923 bool PointsToNode::points_to(JavaObjectNode* ptn) const { |
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1924 if (is_JavaObject()) { |
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1925 return (this == ptn); |
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1926 } |
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1927 assert(is_LocalVar(), "sanity"); |
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1928 for (EdgeIterator i(this); i.has_next(); i.next()) { |
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1929 if (i.get() == ptn) |
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1930 return true; |
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1931 } |
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1932 return false; |
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1933 } |
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1934 |
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1935 // Return true if one node points to an other. |
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1936 bool PointsToNode::meet(PointsToNode* ptn) { |
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1937 if (this == ptn) { |
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1938 return true; |
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1939 } else if (ptn->is_JavaObject()) { |
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1940 return this->points_to(ptn->as_JavaObject()); |
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1941 } else if (this->is_JavaObject()) { |
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1942 return ptn->points_to(this->as_JavaObject()); |
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1943 } |
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1944 assert(this->is_LocalVar() && ptn->is_LocalVar(), "sanity"); |
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1945 int ptn_count = ptn->edge_count(); |
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1946 for (EdgeIterator i(this); i.has_next(); i.next()) { |
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1947 PointsToNode* this_e = i.get(); |
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1948 for (int j = 0; j < ptn_count; j++) { |
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1949 if (this_e == ptn->edge(j)) |
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1950 return true; |
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1951 } |
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1952 } |
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1953 return false; |
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1954 } |
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1955 |
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1956 #ifdef ASSERT |
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1957 // Return true if bases point to this java object. |
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1958 bool FieldNode::has_base(JavaObjectNode* jobj) const { |
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1959 for (BaseIterator i(this); i.has_next(); i.next()) { |
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1960 if (i.get() == jobj) |
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1961 return true; |
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1962 } |
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1963 return false; |
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1964 } |
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1965 #endif |
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1966 |
65 | 1967 int ConnectionGraph::address_offset(Node* adr, PhaseTransform *phase) { |
1968 const Type *adr_type = phase->type(adr); | |
1969 if (adr->is_AddP() && adr_type->isa_oopptr() == NULL && | |
1970 adr->in(AddPNode::Address)->is_Proj() && | |
1971 adr->in(AddPNode::Address)->in(0)->is_Allocate()) { | |
1972 // We are computing a raw address for a store captured by an Initialize | |
1973 // compute an appropriate address type. AddP cases #3 and #5 (see below). | |
1974 int offs = (int)phase->find_intptr_t_con(adr->in(AddPNode::Offset), Type::OffsetBot); | |
1975 assert(offs != Type::OffsetBot || | |
1976 adr->in(AddPNode::Address)->in(0)->is_AllocateArray(), | |
1977 "offset must be a constant or it is initialization of array"); | |
1978 return offs; | |
1979 } | |
1980 const TypePtr *t_ptr = adr_type->isa_ptr(); | |
0 | 1981 assert(t_ptr != NULL, "must be a pointer type"); |
1982 return t_ptr->offset(); | |
1983 } | |
1984 | |
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1985 Node* ConnectionGraph::get_addp_base(Node *addp) { |
65 | 1986 assert(addp->is_AddP(), "must be AddP"); |
1987 // | |
1988 // AddP cases for Base and Address inputs: | |
1989 // case #1. Direct object's field reference: | |
1990 // Allocate | |
1991 // | | |
1992 // Proj #5 ( oop result ) | |
1993 // | | |
1994 // CheckCastPP (cast to instance type) | |
1995 // | | | |
1996 // AddP ( base == address ) | |
1997 // | |
1998 // case #2. Indirect object's field reference: | |
1999 // Phi | |
2000 // | | |
2001 // CastPP (cast to instance type) | |
2002 // | | | |
2003 // AddP ( base == address ) | |
2004 // | |
2005 // case #3. Raw object's field reference for Initialize node: | |
2006 // Allocate | |
2007 // | | |
2008 // Proj #5 ( oop result ) | |
2009 // top | | |
2010 // \ | | |
2011 // AddP ( base == top ) | |
2012 // | |
2013 // case #4. Array's element reference: | |
2014 // {CheckCastPP | CastPP} | |
2015 // | | | | |
2016 // | AddP ( array's element offset ) | |
2017 // | | | |
2018 // AddP ( array's offset ) | |
2019 // | |
2020 // case #5. Raw object's field reference for arraycopy stub call: | |
2021 // The inline_native_clone() case when the arraycopy stub is called | |
2022 // after the allocation before Initialize and CheckCastPP nodes. | |
2023 // Allocate | |
2024 // | | |
2025 // Proj #5 ( oop result ) | |
2026 // | | | |
2027 // AddP ( base == address ) | |
2028 // | |
77 | 2029 // case #6. Constant Pool, ThreadLocal, CastX2P or |
2030 // Raw object's field reference: | |
2031 // {ConP, ThreadLocal, CastX2P, raw Load} | |
65 | 2032 // top | |
2033 // \ | | |
2034 // AddP ( base == top ) | |
2035 // | |
77 | 2036 // case #7. Klass's field reference. |
2037 // LoadKlass | |
2038 // | | | |
2039 // AddP ( base == address ) | |
2040 // | |
164
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2041 // case #8. narrow Klass's field reference. |
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2042 // LoadNKlass |
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2043 // | |
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2044 // DecodeN |
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2045 // | | |
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2046 // AddP ( base == address ) |
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2047 // |
5948
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2048 Node *base = addp->in(AddPNode::Base); |
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2049 if (base->uncast()->is_top()) { // The AddP case #3 and #6. |
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|
2050 base = addp->in(AddPNode::Address); |
957 | 2051 while (base->is_AddP()) { |
2052 // Case #6 (unsafe access) may have several chained AddP nodes. | |
5948
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|
2053 assert(base->in(AddPNode::Base)->uncast()->is_top(), "expected unsafe access address only"); |
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
2054 base = base->in(AddPNode::Address); |
957 | 2055 } |
5948
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|
2056 Node* uncast_base = base->uncast(); |
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
2057 int opcode = uncast_base->Opcode(); |
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|
2058 assert(opcode == Op_ConP || opcode == Op_ThreadLocal || |
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|
2059 opcode == Op_CastX2P || uncast_base->is_DecodeN() || |
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|
2060 (uncast_base->is_Mem() && uncast_base->bottom_type() == TypeRawPtr::NOTNULL) || |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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|
2061 (uncast_base->is_Proj() && uncast_base->in(0)->is_Allocate()), "sanity"); |
0 | 2062 } |
65 | 2063 return base; |
2064 } | |
2065 | |
5948
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|
2066 Node* ConnectionGraph::find_second_addp(Node* addp, Node* n) { |
65 | 2067 assert(addp->is_AddP() && addp->outcnt() > 0, "Don't process dead nodes"); |
2068 Node* addp2 = addp->raw_out(0); | |
2069 if (addp->outcnt() == 1 && addp2->is_AddP() && | |
2070 addp2->in(AddPNode::Base) == n && | |
2071 addp2->in(AddPNode::Address) == addp) { | |
2072 assert(addp->in(AddPNode::Base) == n, "expecting the same base"); | |
2073 // | |
2074 // Find array's offset to push it on worklist first and | |
2075 // as result process an array's element offset first (pushed second) | |
2076 // to avoid CastPP for the array's offset. | |
2077 // Otherwise the inserted CastPP (LocalVar) will point to what | |
2078 // the AddP (Field) points to. Which would be wrong since | |
2079 // the algorithm expects the CastPP has the same point as | |
2080 // as AddP's base CheckCastPP (LocalVar). | |
2081 // | |
2082 // ArrayAllocation | |
2083 // | | |
2084 // CheckCastPP | |
2085 // | | |
2086 // memProj (from ArrayAllocation CheckCastPP) | |
2087 // | || | |
2088 // | || Int (element index) | |
2089 // | || | ConI (log(element size)) | |
2090 // | || | / | |
2091 // | || LShift | |
2092 // | || / | |
2093 // | AddP (array's element offset) | |
2094 // | | | |
2095 // | | ConI (array's offset: #12(32-bits) or #24(64-bits)) | |
2096 // | / / | |
2097 // AddP (array's offset) | |
2098 // | | |
2099 // Load/Store (memory operation on array's element) | |
2100 // | |
2101 return addp2; | |
2102 } | |
2103 return NULL; | |
0 | 2104 } |
2105 | |
2106 // | |
2107 // Adjust the type and inputs of an AddP which computes the | |
2108 // address of a field of an instance | |
2109 // | |
5948
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|
2110 bool ConnectionGraph::split_AddP(Node *addp, Node *base) { |
ee138854b3a6
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|
2111 PhaseGVN* igvn = _igvn; |
65 | 2112 const TypeOopPtr *base_t = igvn->type(base)->isa_oopptr(); |
223 | 2113 assert(base_t != NULL && base_t->is_known_instance(), "expecting instance oopptr"); |
0 | 2114 const TypeOopPtr *t = igvn->type(addp)->isa_oopptr(); |
65 | 2115 if (t == NULL) { |
2116 // We are computing a raw address for a store captured by an Initialize | |
293
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|
2117 // compute an appropriate address type (cases #3 and #5). |
65 | 2118 assert(igvn->type(addp) == TypeRawPtr::NOTNULL, "must be raw pointer"); |
2119 assert(addp->in(AddPNode::Address)->is_Proj(), "base of raw address must be result projection from allocation"); | |
306
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6741738: TypePtr::add_offset() set incorrect offset when the add overflows
kvn
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|
2120 intptr_t offs = (int)igvn->find_intptr_t_con(addp->in(AddPNode::Offset), Type::OffsetBot); |
65 | 2121 assert(offs != Type::OffsetBot, "offset must be a constant"); |
2122 t = base_t->add_offset(offs)->is_oopptr(); | |
2123 } | |
223 | 2124 int inst_id = base_t->instance_id(); |
2125 assert(!t->is_known_instance() || t->instance_id() == inst_id, | |
0 | 2126 "old type must be non-instance or match new type"); |
293
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|
2127 |
c3e045194476
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|
2128 // The type 't' could be subclass of 'base_t'. |
c3e045194476
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|
2129 // As result t->offset() could be large then base_t's size and it will |
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|
2130 // cause the failure in add_offset() with narrow oops since TypeOopPtr() |
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|
2131 // constructor verifies correctness of the offset. |
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|
2132 // |
605 | 2133 // It could happened on subclass's branch (from the type profiling |
293
c3e045194476
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|
2134 // inlining) which was not eliminated during parsing since the exactness |
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|
2135 // of the allocation type was not propagated to the subclass type check. |
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|
2136 // |
988
7e309ecb83ce
6879362: assert(!klass_is_exact(),"only non-exact klass")
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957
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|
2137 // Or the type 't' could be not related to 'base_t' at all. |
7e309ecb83ce
6879362: assert(!klass_is_exact(),"only non-exact klass")
kvn
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957
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|
2138 // It could happened when CHA type is different from MDO type on a dead path |
7e309ecb83ce
6879362: assert(!klass_is_exact(),"only non-exact klass")
kvn
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957
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|
2139 // (for example, from instanceof check) which is not collapsed during parsing. |
7e309ecb83ce
6879362: assert(!klass_is_exact(),"only non-exact klass")
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|
2140 // |
293
c3e045194476
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|
2141 // Do nothing for such AddP node and don't process its users since |
c3e045194476
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|
2142 // this code branch will go away. |
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2143 // |
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2144 if (!t->is_known_instance() && |
988
7e309ecb83ce
6879362: assert(!klass_is_exact(),"only non-exact klass")
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|
2145 !base_t->klass()->is_subtype_of(t->klass())) { |
293
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|
2146 return false; // bail out |
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|
2147 } |
0 | 2148 const TypeOopPtr *tinst = base_t->add_offset(t->offset())->is_oopptr(); |
1062
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|
2149 // Do NOT remove the next line: ensure a new alias index is allocated |
dcdcc8c16e20
6896352: CTW fails hotspot/src/share/vm/opto/escape.cpp:1155
kvn
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|
2150 // for the instance type. Note: C++ will not remove it since the call |
dcdcc8c16e20
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kvn
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|
2151 // has side effect. |
0 | 2152 int alias_idx = _compile->get_alias_index(tinst); |
2153 igvn->set_type(addp, tinst); | |
2154 // record the allocation in the node map | |
5948
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|
2155 set_map(addp, get_map(base->_idx)); |
253
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2156 // Set addp's Base and Address to 'base'. |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2157 Node *abase = addp->in(AddPNode::Base); |
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|
2158 Node *adr = addp->in(AddPNode::Address); |
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|
2159 if (adr->is_Proj() && adr->in(0)->is_Allocate() && |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2160 adr->in(0)->_idx == (uint)inst_id) { |
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6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2161 // Skip AddP cases #3 and #5. |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2162 } else { |
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6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2163 assert(!abase->is_top(), "sanity"); // AddP case #3 |
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|
2164 if (abase != base) { |
b0fe4deeb9fb
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|
2165 igvn->hash_delete(addp); |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2166 addp->set_req(AddPNode::Base, base); |
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6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2167 if (abase == adr) { |
b0fe4deeb9fb
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|
2168 addp->set_req(AddPNode::Address, base); |
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6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2169 } else { |
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|
2170 // AddP case #4 (adr is array's element offset AddP node) |
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|
2171 #ifdef ASSERT |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
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|
2172 const TypeOopPtr *atype = igvn->type(adr)->isa_oopptr(); |
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|
2173 assert(adr->is_AddP() && atype != NULL && |
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|
2174 atype->instance_id() == inst_id, "array's element offset should be processed first"); |
b0fe4deeb9fb
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|
2175 #endif |
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|
2176 } |
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|
2177 igvn->hash_insert(addp); |
0 | 2178 } |
2179 } | |
65 | 2180 // Put on IGVN worklist since at least addp's type was changed above. |
2181 record_for_optimizer(addp); | |
293
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|
2182 return true; |
0 | 2183 } |
2184 | |
2185 // | |
2186 // Create a new version of orig_phi if necessary. Returns either the newly | |
2459
55973726c600
6992789: assert(phi->_idx >= nodes_size()) failed: only new Phi per instance memory slice
kvn
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2249
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|
2187 // created phi or an existing phi. Sets create_new to indicate whether a new |
0 | 2188 // phi was created. Cache the last newly created phi in the node map. |
2189 // | |
5948
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|
2190 PhiNode *ConnectionGraph::create_split_phi(PhiNode *orig_phi, int alias_idx, GrowableArray<PhiNode *> &orig_phi_worklist, bool &new_created) { |
0 | 2191 Compile *C = _compile; |
5948
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|
2192 PhaseGVN* igvn = _igvn; |
0 | 2193 new_created = false; |
2194 int phi_alias_idx = C->get_alias_index(orig_phi->adr_type()); | |
2195 // nothing to do if orig_phi is bottom memory or matches alias_idx | |
65 | 2196 if (phi_alias_idx == alias_idx) { |
0 | 2197 return orig_phi; |
2198 } | |
851
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2199 // Have we recently created a Phi for this alias index? |
0 | 2200 PhiNode *result = get_map_phi(orig_phi->_idx); |
2201 if (result != NULL && C->get_alias_index(result->adr_type()) == alias_idx) { | |
2202 return result; | |
2203 } | |
851
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2204 // Previous check may fail when the same wide memory Phi was split into Phis |
fc4be448891f
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2205 // for different memory slices. Search all Phis for this region. |
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2206 if (result != NULL) { |
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|
2207 Node* region = orig_phi->in(0); |
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2208 for (DUIterator_Fast imax, i = region->fast_outs(imax); i < imax; i++) { |
fc4be448891f
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|
2209 Node* phi = region->fast_out(i); |
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2210 if (phi->is_Phi() && |
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|
2211 C->get_alias_index(phi->as_Phi()->adr_type()) == alias_idx) { |
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|
2212 assert(phi->_idx >= nodes_size(), "only new Phi per instance memory slice"); |
fc4be448891f
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|
2213 return phi->as_Phi(); |
fc4be448891f
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|
2214 } |
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|
2215 } |
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|
2216 } |
38
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2217 if ((int)C->unique() + 2*NodeLimitFudgeFactor > MaxNodeLimit) { |
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|
2218 if (C->do_escape_analysis() == true && !C->failing()) { |
b789bcaf2dd9
6667610: (Escape Analysis) retry compilation without EA if it fails
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|
2219 // Retry compilation without escape analysis. |
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|
2220 // If this is the first failure, the sentinel string will "stick" |
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|
2221 // to the Compile object, and the C2Compiler will see it and retry. |
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|
2222 C->record_failure(C2Compiler::retry_no_escape_analysis()); |
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|
2223 } |
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|
2224 return NULL; |
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|
2225 } |
0 | 2226 orig_phi_worklist.append_if_missing(orig_phi); |
65 | 2227 const TypePtr *atype = C->get_adr_type(alias_idx); |
0 | 2228 result = PhiNode::make(orig_phi->in(0), NULL, Type::MEMORY, atype); |
851
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2229 C->copy_node_notes_to(result, orig_phi); |
0 | 2230 igvn->set_type(result, result->bottom_type()); |
2231 record_for_optimizer(result); | |
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2232 set_map(orig_phi, result); |
0 | 2233 new_created = true; |
2234 return result; | |
2235 } | |
2236 | |
2237 // | |
2459
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2238 // Return a new version of Memory Phi "orig_phi" with the inputs having the |
0 | 2239 // specified alias index. |
2240 // | |
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2241 PhiNode *ConnectionGraph::split_memory_phi(PhiNode *orig_phi, int alias_idx, GrowableArray<PhiNode *> &orig_phi_worklist) { |
0 | 2242 assert(alias_idx != Compile::AliasIdxBot, "can't split out bottom memory"); |
2243 Compile *C = _compile; | |
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2244 PhaseGVN* igvn = _igvn; |
0 | 2245 bool new_phi_created; |
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2246 PhiNode *result = create_split_phi(orig_phi, alias_idx, orig_phi_worklist, new_phi_created); |
0 | 2247 if (!new_phi_created) { |
2248 return result; | |
2249 } | |
2250 GrowableArray<PhiNode *> phi_list; | |
2251 GrowableArray<uint> cur_input; | |
2252 PhiNode *phi = orig_phi; | |
2253 uint idx = 1; | |
2254 bool finished = false; | |
2255 while(!finished) { | |
2256 while (idx < phi->req()) { | |
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2257 Node *mem = find_inst_mem(phi->in(idx), alias_idx, orig_phi_worklist); |
0 | 2258 if (mem != NULL && mem->is_Phi()) { |
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|
2259 PhiNode *newphi = create_split_phi(mem->as_Phi(), alias_idx, orig_phi_worklist, new_phi_created); |
0 | 2260 if (new_phi_created) { |
2261 // found an phi for which we created a new split, push current one on worklist and begin | |
2262 // processing new one | |
2263 phi_list.push(phi); | |
2264 cur_input.push(idx); | |
2265 phi = mem->as_Phi(); | |
65 | 2266 result = newphi; |
0 | 2267 idx = 1; |
2268 continue; | |
2269 } else { | |
65 | 2270 mem = newphi; |
0 | 2271 } |
2272 } | |
38
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|
2273 if (C->failing()) { |
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|
2274 return NULL; |
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|
2275 } |
0 | 2276 result->set_req(idx++, mem); |
2277 } | |
2278 #ifdef ASSERT | |
2279 // verify that the new Phi has an input for each input of the original | |
2280 assert( phi->req() == result->req(), "must have same number of inputs."); | |
2281 assert( result->in(0) != NULL && result->in(0) == phi->in(0), "regions must match"); | |
65 | 2282 #endif |
2283 // Check if all new phi's inputs have specified alias index. | |
2284 // Otherwise use old phi. | |
0 | 2285 for (uint i = 1; i < phi->req(); i++) { |
65 | 2286 Node* in = result->in(i); |
2287 assert((phi->in(i) == NULL) == (in == NULL), "inputs must correspond."); | |
0 | 2288 } |
2289 // we have finished processing a Phi, see if there are any more to do | |
2290 finished = (phi_list.length() == 0 ); | |
2291 if (!finished) { | |
2292 phi = phi_list.pop(); | |
2293 idx = cur_input.pop(); | |
65 | 2294 PhiNode *prev_result = get_map_phi(phi->_idx); |
2295 prev_result->set_req(idx++, result); | |
2296 result = prev_result; | |
0 | 2297 } |
2298 } | |
2299 return result; | |
2300 } | |
2301 | |
65 | 2302 // |
2303 // The next methods are derived from methods in MemNode. | |
2304 // | |
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|
2305 Node* ConnectionGraph::step_through_mergemem(MergeMemNode *mmem, int alias_idx, const TypeOopPtr *toop) { |
65 | 2306 Node *mem = mmem; |
1815 | 2307 // TypeOopPtr::NOTNULL+any is an OOP with unknown offset - generally |
65 | 2308 // means an array I have not precisely typed yet. Do not do any |
2309 // alias stuff with it any time soon. | |
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|
2310 if (toop->base() != Type::AnyPtr && |
1815 | 2311 !(toop->klass() != NULL && |
2312 toop->klass()->is_java_lang_Object() && | |
5948
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|
2313 toop->offset() == Type::OffsetBot)) { |
65 | 2314 mem = mmem->memory_at(alias_idx); |
2315 // Update input if it is progress over what we have now | |
2316 } | |
2317 return mem; | |
2318 } | |
2319 | |
2320 // | |
1101
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|
2321 // Move memory users to their memory slices. |
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|
2322 // |
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|
2323 void ConnectionGraph::move_inst_mem(Node* n, GrowableArray<PhiNode *> &orig_phis) { |
1101
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|
2324 Compile* C = _compile; |
5948
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|
2325 PhaseGVN* igvn = _igvn; |
1101
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|
2326 const TypePtr* tp = igvn->type(n->in(MemNode::Address))->isa_ptr(); |
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2327 assert(tp != NULL, "ptr type"); |
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|
2328 int alias_idx = C->get_alias_index(tp); |
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|
2329 int general_idx = C->get_general_index(alias_idx); |
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|
2330 |
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|
2331 // Move users first |
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|
2332 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
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|
2333 Node* use = n->fast_out(i); |
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|
2334 if (use->is_MergeMem()) { |
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|
2335 MergeMemNode* mmem = use->as_MergeMem(); |
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|
2336 assert(n == mmem->memory_at(alias_idx), "should be on instance memory slice"); |
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|
2337 if (n != mmem->memory_at(general_idx) || alias_idx == general_idx) { |
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|
2338 continue; // Nothing to do |
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|
2339 } |
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|
2340 // Replace previous general reference to mem node. |
7fee0a6cc6d4
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|
2341 uint orig_uniq = C->unique(); |
5948
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|
2342 Node* m = find_inst_mem(n, general_idx, orig_phis); |
1101
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|
2343 assert(orig_uniq == C->unique(), "no new nodes"); |
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|
2344 mmem->set_memory_at(general_idx, m); |
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|
2345 --imax; |
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diff
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|
2346 --i; |
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|
2347 } else if (use->is_MemBar()) { |
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changeset
|
2348 assert(!use->is_Initialize(), "initializing stores should not be moved"); |
7fee0a6cc6d4
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|
2349 if (use->req() > MemBarNode::Precedent && |
7fee0a6cc6d4
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kvn
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diff
changeset
|
2350 use->in(MemBarNode::Precedent) == n) { |
7fee0a6cc6d4
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kvn
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diff
changeset
|
2351 // Don't move related membars. |
7fee0a6cc6d4
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diff
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|
2352 record_for_optimizer(use); |
7fee0a6cc6d4
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diff
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|
2353 continue; |
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|
2354 } |
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|
2355 tp = use->as_MemBar()->adr_type()->isa_ptr(); |
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|
2356 if (tp != NULL && C->get_alias_index(tp) == alias_idx || |
7fee0a6cc6d4
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|
2357 alias_idx == general_idx) { |
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6896727: nsk/logging/LoggingPermission/LoggingPermission/logperm002 fails with G1, EscapeAnalisys
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|
2358 continue; // Nothing to do |
7fee0a6cc6d4
6896727: nsk/logging/LoggingPermission/LoggingPermission/logperm002 fails with G1, EscapeAnalisys
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|
2359 } |
7fee0a6cc6d4
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changeset
|
2360 // Move to general memory slice. |
7fee0a6cc6d4
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diff
changeset
|
2361 uint orig_uniq = C->unique(); |
5948
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|
2362 Node* m = find_inst_mem(n, general_idx, orig_phis); |
1101
7fee0a6cc6d4
6896727: nsk/logging/LoggingPermission/LoggingPermission/logperm002 fails with G1, EscapeAnalisys
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changeset
|
2363 assert(orig_uniq == C->unique(), "no new nodes"); |
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|
2364 igvn->hash_delete(use); |
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|
2365 imax -= use->replace_edge(n, m); |
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|
2366 igvn->hash_insert(use); |
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|
2367 record_for_optimizer(use); |
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|
2368 --i; |
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changeset
|
2369 #ifdef ASSERT |
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|
2370 } else if (use->is_Mem()) { |
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|
2371 if (use->Opcode() == Op_StoreCM && use->in(MemNode::OopStore) == n) { |
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changeset
|
2372 // Don't move related cardmark. |
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|
2373 continue; |
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|
2374 } |
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changeset
|
2375 // Memory nodes should have new memory input. |
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|
2376 tp = igvn->type(use->in(MemNode::Address))->isa_ptr(); |
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changeset
|
2377 assert(tp != NULL, "ptr type"); |
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|
2378 int idx = C->get_alias_index(tp); |
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|
2379 assert(get_map(use->_idx) != NULL || idx == alias_idx, |
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|
2380 "Following memory nodes should have new memory input or be on the same memory slice"); |
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2381 } else if (use->is_Phi()) { |
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|
2382 // Phi nodes should be split and moved already. |
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|
2383 tp = use->as_Phi()->adr_type()->isa_ptr(); |
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changeset
|
2384 assert(tp != NULL, "ptr type"); |
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changeset
|
2385 int idx = C->get_alias_index(tp); |
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|
2386 assert(idx == alias_idx, "Following Phi nodes should be on the same memory slice"); |
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|
2387 } else { |
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|
2388 use->dump(); |
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changeset
|
2389 assert(false, "should not be here"); |
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changeset
|
2390 #endif |
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|
2391 } |
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|
2392 } |
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changeset
|
2393 } |
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|
2394 |
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|
2395 // |
65 | 2396 // Search memory chain of "mem" to find a MemNode whose address |
2397 // is the specified alias index. | |
2398 // | |
5948
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|
2399 Node* ConnectionGraph::find_inst_mem(Node *orig_mem, int alias_idx, GrowableArray<PhiNode *> &orig_phis) { |
65 | 2400 if (orig_mem == NULL) |
2401 return orig_mem; | |
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2402 Compile* C = _compile; |
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2403 PhaseGVN* igvn = _igvn; |
1815 | 2404 const TypeOopPtr *toop = C->get_adr_type(alias_idx)->isa_oopptr(); |
2405 bool is_instance = (toop != NULL) && toop->is_known_instance(); | |
253
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2406 Node *start_mem = C->start()->proj_out(TypeFunc::Memory); |
65 | 2407 Node *prev = NULL; |
2408 Node *result = orig_mem; | |
2409 while (prev != result) { | |
2410 prev = result; | |
253
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2411 if (result == start_mem) |
605 | 2412 break; // hit one of our sentinels |
65 | 2413 if (result->is_Mem()) { |
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2414 const Type *at = igvn->type(result->in(MemNode::Address)); |
2459
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2415 if (at == Type::TOP) |
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2416 break; // Dead |
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2417 assert (at->isa_ptr() != NULL, "pointer type required."); |
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2418 int idx = C->get_alias_index(at->is_ptr()); |
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2419 if (idx == alias_idx) |
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2420 break; // Found |
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2421 if (!is_instance && (at->isa_oopptr() == NULL || |
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2422 !at->is_oopptr()->is_known_instance())) { |
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2423 break; // Do not skip store to general memory slice. |
65 | 2424 } |
253
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2425 result = result->in(MemNode::Memory); |
65 | 2426 } |
2427 if (!is_instance) | |
2428 continue; // don't search further for non-instance types | |
2429 // skip over a call which does not affect this memory slice | |
2430 if (result->is_Proj() && result->as_Proj()->_con == TypeFunc::Memory) { | |
2431 Node *proj_in = result->in(0); | |
1815 | 2432 if (proj_in->is_Allocate() && proj_in->_idx == (uint)toop->instance_id()) { |
605 | 2433 break; // hit one of our sentinels |
253
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2434 } else if (proj_in->is_Call()) { |
65 | 2435 CallNode *call = proj_in->as_Call(); |
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2436 if (!call->may_modify(toop, igvn)) { |
65 | 2437 result = call->in(TypeFunc::Memory); |
2438 } | |
2439 } else if (proj_in->is_Initialize()) { | |
2440 AllocateNode* alloc = proj_in->as_Initialize()->allocation(); | |
2441 // Stop if this is the initialization for the object instance which | |
2442 // which contains this memory slice, otherwise skip over it. | |
1815 | 2443 if (alloc == NULL || alloc->_idx != (uint)toop->instance_id()) { |
65 | 2444 result = proj_in->in(TypeFunc::Memory); |
2445 } | |
2446 } else if (proj_in->is_MemBar()) { | |
2447 result = proj_in->in(TypeFunc::Memory); | |
2448 } | |
2449 } else if (result->is_MergeMem()) { | |
2450 MergeMemNode *mmem = result->as_MergeMem(); | |
1815 | 2451 result = step_through_mergemem(mmem, alias_idx, toop); |
65 | 2452 if (result == mmem->base_memory()) { |
2453 // Didn't find instance memory, search through general slice recursively. | |
2454 result = mmem->memory_at(C->get_general_index(alias_idx)); | |
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2455 result = find_inst_mem(result, alias_idx, orig_phis); |
65 | 2456 if (C->failing()) { |
2457 return NULL; | |
2458 } | |
2459 mmem->set_memory_at(alias_idx, result); | |
2460 } | |
2461 } else if (result->is_Phi() && | |
2462 C->get_alias_index(result->as_Phi()->adr_type()) != alias_idx) { | |
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2463 Node *un = result->as_Phi()->unique_input(igvn); |
65 | 2464 if (un != NULL) { |
1101
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2465 orig_phis.append_if_missing(result->as_Phi()); |
65 | 2466 result = un; |
2467 } else { | |
2468 break; | |
2469 } | |
1100
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2470 } else if (result->is_ClearArray()) { |
5948
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2471 if (!ClearArrayNode::step_through(&result, (uint)toop->instance_id(), igvn)) { |
1100
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2472 // Can not bypass initialization of the instance |
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|
2473 // we are looking for. |
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|
2474 break; |
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|
2475 } |
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|
2476 // Otherwise skip it (the call updated 'result' value). |
584 | 2477 } else if (result->Opcode() == Op_SCMemProj) { |
2478 assert(result->in(0)->is_LoadStore(), "sanity"); | |
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2479 const Type *at = igvn->type(result->in(0)->in(MemNode::Address)); |
584 | 2480 if (at != Type::TOP) { |
2481 assert (at->isa_ptr() != NULL, "pointer type required."); | |
2482 int idx = C->get_alias_index(at->is_ptr()); | |
2483 assert(idx != alias_idx, "Object is not scalar replaceable if a LoadStore node access its field"); | |
2484 break; | |
2485 } | |
2486 result = result->in(0)->in(MemNode::Memory); | |
65 | 2487 } |
2488 } | |
247 | 2489 if (result->is_Phi()) { |
65 | 2490 PhiNode *mphi = result->as_Phi(); |
2491 assert(mphi->bottom_type() == Type::MEMORY, "memory phi required"); | |
2492 const TypePtr *t = mphi->adr_type(); | |
2459
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2493 if (!is_instance) { |
247 | 2494 // Push all non-instance Phis on the orig_phis worklist to update inputs |
2495 // during Phase 4 if needed. | |
2496 orig_phis.append_if_missing(mphi); | |
2459
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2497 } else if (C->get_alias_index(t) != alias_idx) { |
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2498 // Create a new Phi with the specified alias index type. |
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2499 result = split_memory_phi(mphi, alias_idx, orig_phis); |
65 | 2500 } |
2501 } | |
2502 // the result is either MemNode, PhiNode, InitializeNode. | |
2503 return result; | |
2504 } | |
2505 | |
0 | 2506 // |
2507 // Convert the types of unescaped object to instance types where possible, | |
2508 // propagate the new type information through the graph, and update memory | |
2509 // edges and MergeMem inputs to reflect the new type. | |
2510 // | |
2511 // We start with allocations (and calls which may be allocations) on alloc_worklist. | |
2512 // The processing is done in 4 phases: | |
2513 // | |
2514 // Phase 1: Process possible allocations from alloc_worklist. Create instance | |
2515 // types for the CheckCastPP for allocations where possible. | |
2516 // Propagate the the new types through users as follows: | |
2517 // casts and Phi: push users on alloc_worklist | |
2518 // AddP: cast Base and Address inputs to the instance type | |
2519 // push any AddP users on alloc_worklist and push any memnode | |
2520 // users onto memnode_worklist. | |
2521 // Phase 2: Process MemNode's from memnode_worklist. compute new address type and | |
2522 // search the Memory chain for a store with the appropriate type | |
2523 // address type. If a Phi is found, create a new version with | |
605 | 2524 // the appropriate memory slices from each of the Phi inputs. |
0 | 2525 // For stores, process the users as follows: |
2526 // MemNode: push on memnode_worklist | |
2527 // MergeMem: push on mergemem_worklist | |
2528 // Phase 3: Process MergeMem nodes from mergemem_worklist. Walk each memory slice | |
2529 // moving the first node encountered of each instance type to the | |
2530 // the input corresponding to its alias index. | |
2531 // appropriate memory slice. | |
2532 // Phase 4: Update the inputs of non-instance memory Phis and the Memory input of memnodes. | |
2533 // | |
2534 // In the following example, the CheckCastPP nodes are the cast of allocation | |
2535 // results and the allocation of node 29 is unescaped and eligible to be an | |
2536 // instance type. | |
2537 // | |
2538 // We start with: | |
2539 // | |
2540 // 7 Parm #memory | |
2541 // 10 ConI "12" | |
2542 // 19 CheckCastPP "Foo" | |
2543 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
2544 // 29 CheckCastPP "Foo" | |
2545 // 30 AddP _ 29 29 10 Foo+12 alias_index=4 | |
2546 // | |
2547 // 40 StoreP 25 7 20 ... alias_index=4 | |
2548 // 50 StoreP 35 40 30 ... alias_index=4 | |
2549 // 60 StoreP 45 50 20 ... alias_index=4 | |
2550 // 70 LoadP _ 60 30 ... alias_index=4 | |
2551 // 80 Phi 75 50 60 Memory alias_index=4 | |
2552 // 90 LoadP _ 80 30 ... alias_index=4 | |
2553 // 100 LoadP _ 80 20 ... alias_index=4 | |
2554 // | |
2555 // | |
2556 // Phase 1 creates an instance type for node 29 assigning it an instance id of 24 | |
2557 // and creating a new alias index for node 30. This gives: | |
2558 // | |
2559 // 7 Parm #memory | |
2560 // 10 ConI "12" | |
2561 // 19 CheckCastPP "Foo" | |
2562 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
2563 // 29 CheckCastPP "Foo" iid=24 | |
2564 // 30 AddP _ 29 29 10 Foo+12 alias_index=6 iid=24 | |
2565 // | |
2566 // 40 StoreP 25 7 20 ... alias_index=4 | |
2567 // 50 StoreP 35 40 30 ... alias_index=6 | |
2568 // 60 StoreP 45 50 20 ... alias_index=4 | |
2569 // 70 LoadP _ 60 30 ... alias_index=6 | |
2570 // 80 Phi 75 50 60 Memory alias_index=4 | |
2571 // 90 LoadP _ 80 30 ... alias_index=6 | |
2572 // 100 LoadP _ 80 20 ... alias_index=4 | |
2573 // | |
2574 // In phase 2, new memory inputs are computed for the loads and stores, | |
2575 // And a new version of the phi is created. In phase 4, the inputs to | |
2576 // node 80 are updated and then the memory nodes are updated with the | |
2577 // values computed in phase 2. This results in: | |
2578 // | |
2579 // 7 Parm #memory | |
2580 // 10 ConI "12" | |
2581 // 19 CheckCastPP "Foo" | |
2582 // 20 AddP _ 19 19 10 Foo+12 alias_index=4 | |
2583 // 29 CheckCastPP "Foo" iid=24 | |
2584 // 30 AddP _ 29 29 10 Foo+12 alias_index=6 iid=24 | |
2585 // | |
2586 // 40 StoreP 25 7 20 ... alias_index=4 | |
2587 // 50 StoreP 35 7 30 ... alias_index=6 | |
2588 // 60 StoreP 45 40 20 ... alias_index=4 | |
2589 // 70 LoadP _ 50 30 ... alias_index=6 | |
2590 // 80 Phi 75 40 60 Memory alias_index=4 | |
2591 // 120 Phi 75 50 50 Memory alias_index=6 | |
2592 // 90 LoadP _ 120 30 ... alias_index=6 | |
2593 // 100 LoadP _ 80 20 ... alias_index=4 | |
2594 // | |
2595 void ConnectionGraph::split_unique_types(GrowableArray<Node *> &alloc_worklist) { | |
2596 GrowableArray<Node *> memnode_worklist; | |
2597 GrowableArray<PhiNode *> orig_phis; | |
1921 | 2598 PhaseIterGVN *igvn = _igvn; |
0 | 2599 uint new_index_start = (uint) _compile->num_alias_types(); |
1101
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2600 Arena* arena = Thread::current()->resource_area(); |
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2601 VectorSet visited(arena); |
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2602 ideal_nodes.clear(); // Reset for use with set_map/get_map. |
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2603 uint unique_old = _compile->unique(); |
65 | 2604 |
2605 // Phase 1: Process possible allocations from alloc_worklist. | |
2606 // Create instance types for the CheckCastPP for allocations where possible. | |
244
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2607 // |
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2608 // (Note: don't forget to change the order of the second AddP node on |
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2609 // the alloc_worklist if the order of the worklist processing is changed, |
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2610 // see the comment in find_second_addp().) |
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2611 // |
0 | 2612 while (alloc_worklist.length() != 0) { |
2613 Node *n = alloc_worklist.pop(); | |
2614 uint ni = n->_idx; | |
2615 if (n->is_Call()) { | |
2616 CallNode *alloc = n->as_Call(); | |
2617 // copy escape information to call node | |
244
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2618 PointsToNode* ptn = ptnode_adr(alloc->_idx); |
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2619 PointsToNode::EscapeState es = ptn->escape_state(); |
65 | 2620 // We have an allocation or call which returns a Java object, |
2621 // see if it is unescaped. | |
4058
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2622 if (es != PointsToNode::NoEscape || !ptn->scalar_replaceable()) |
0 | 2623 continue; |
784
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2624 // Find CheckCastPP for the allocate or for the return value of a call |
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2625 n = alloc->result_cast(); |
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2626 if (n == NULL) { // No uses except Initialize node |
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2627 if (alloc->is_Allocate()) { |
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2628 // Set the scalar_replaceable flag for allocation |
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2629 // so it could be eliminated if it has no uses. |
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2630 alloc->as_Allocate()->_is_scalar_replaceable = true; |
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2631 } |
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2632 continue; |
39
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2633 } |
784
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2634 if (!n->is_CheckCastPP()) { // not unique CheckCastPP. |
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2635 assert(!alloc->is_Allocate(), "allocation should have unique type"); |
65 | 2636 continue; |
784
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2637 } |
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2638 |
65 | 2639 // The inline code for Object.clone() casts the allocation result to |
247 | 2640 // java.lang.Object and then to the actual type of the allocated |
65 | 2641 // object. Detect this case and use the second cast. |
247 | 2642 // Also detect j.l.reflect.Array.newInstance(jobject, jint) case when |
2643 // the allocation result is cast to java.lang.Object and then | |
2644 // to the actual Array type. | |
65 | 2645 if (alloc->is_Allocate() && n->as_Type()->type() == TypeInstPtr::NOTNULL |
247 | 2646 && (alloc->is_AllocateArray() || |
2647 igvn->type(alloc->in(AllocateNode::KlassNode)) != TypeKlassPtr::OBJECT)) { | |
65 | 2648 Node *cast2 = NULL; |
2649 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
2650 Node *use = n->fast_out(i); | |
2651 if (use->is_CheckCastPP()) { | |
2652 cast2 = use; | |
2653 break; | |
2654 } | |
2655 } | |
2656 if (cast2 != NULL) { | |
2657 n = cast2; | |
2658 } else { | |
784
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2659 // Non-scalar replaceable if the allocation type is unknown statically |
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2660 // (reflection allocation), the object can't be restored during |
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|
2661 // deoptimization without precise type. |
65 | 2662 continue; |
2663 } | |
2664 } | |
784
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2665 if (alloc->is_Allocate()) { |
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2666 // Set the scalar_replaceable flag for allocation |
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2667 // so it could be eliminated. |
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|
2668 alloc->as_Allocate()->_is_scalar_replaceable = true; |
b2934faac289
6836054: java/util/Arrays/CopyMethods.java fails on solaris-sparc with IllegalArgumentException
kvn
parents:
605
diff
changeset
|
2669 } |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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5901
diff
changeset
|
2670 set_escape_state(ptnode_adr(n->_idx), es); // CheckCastPP escape state |
247 | 2671 // in order for an object to be scalar-replaceable, it must be: |
65 | 2672 // - a direct allocation (not a call returning an object) |
2673 // - non-escaping | |
2674 // - eligible to be a unique type | |
2675 // - not determined to be ineligible by escape analysis | |
5948
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7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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5901
diff
changeset
|
2676 set_map(alloc, n); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2677 set_map(n, alloc); |
65 | 2678 const TypeOopPtr *t = igvn->type(n)->isa_oopptr(); |
2679 if (t == NULL) | |
4058
59e515ee9354
7059047: EA: can't find initializing store with several CheckCastPP
kvn
parents:
4046
diff
changeset
|
2680 continue; // not a TypeOopPtr |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2681 const TypeOopPtr* tinst = t->cast_to_exactness(true)->is_oopptr()->cast_to_instance_id(ni); |
0 | 2682 igvn->hash_delete(n); |
2683 igvn->set_type(n, tinst); | |
2684 n->raise_bottom_type(tinst); | |
2685 igvn->hash_insert(n); | |
65 | 2686 record_for_optimizer(n); |
4058
59e515ee9354
7059047: EA: can't find initializing store with several CheckCastPP
kvn
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4046
diff
changeset
|
2687 if (alloc->is_Allocate() && (t->isa_instptr() || t->isa_aryptr())) { |
163 | 2688 |
2689 // First, put on the worklist all Field edges from Connection Graph | |
2690 // which is more accurate then putting immediate users from Ideal Graph. | |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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5901
diff
changeset
|
2691 for (EdgeIterator e(ptn); e.has_next(); e.next()) { |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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diff
changeset
|
2692 PointsToNode* tgt = e.get(); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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5901
diff
changeset
|
2693 Node* use = tgt->ideal_node(); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2694 assert(tgt->is_Field() && use->is_AddP(), |
163 | 2695 "only AddP nodes are Field edges in CG"); |
2696 if (use->outcnt() > 0) { // Don't process dead nodes | |
2697 Node* addp2 = find_second_addp(use, use->in(AddPNode::Base)); | |
2698 if (addp2 != NULL) { | |
2699 assert(alloc->is_AllocateArray(),"array allocation was expected"); | |
2700 alloc_worklist.append_if_missing(addp2); | |
2701 } | |
2702 alloc_worklist.append_if_missing(use); | |
2703 } | |
2704 } | |
2705 | |
65 | 2706 // An allocation may have an Initialize which has raw stores. Scan |
2707 // the users of the raw allocation result and push AddP users | |
2708 // on alloc_worklist. | |
2709 Node *raw_result = alloc->proj_out(TypeFunc::Parms); | |
2710 assert (raw_result != NULL, "must have an allocation result"); | |
2711 for (DUIterator_Fast imax, i = raw_result->fast_outs(imax); i < imax; i++) { | |
2712 Node *use = raw_result->fast_out(i); | |
2713 if (use->is_AddP() && use->outcnt() > 0) { // Don't process dead nodes | |
2714 Node* addp2 = find_second_addp(use, raw_result); | |
2715 if (addp2 != NULL) { | |
2716 assert(alloc->is_AllocateArray(),"array allocation was expected"); | |
2717 alloc_worklist.append_if_missing(addp2); | |
2718 } | |
2719 alloc_worklist.append_if_missing(use); | |
1100
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|
2720 } else if (use->is_MemBar()) { |
65 | 2721 memnode_worklist.append_if_missing(use); |
2722 } | |
2723 } | |
2724 } | |
0 | 2725 } else if (n->is_AddP()) { |
5948
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7147744: CTW: assert(false) failed: infinite EA connection graph build
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changeset
|
2726 JavaObjectNode* jobj = unique_java_object(get_addp_base(n)); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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changeset
|
2727 if (jobj == NULL || jobj == phantom_obj) { |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
2728 #ifdef ASSERT |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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diff
changeset
|
2729 ptnode_adr(get_addp_base(n)->_idx)->dump(); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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diff
changeset
|
2730 ptnode_adr(n->_idx)->dump(); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2731 assert(jobj != NULL && jobj != phantom_obj, "escaped allocation"); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2732 #endif |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
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diff
changeset
|
2733 _compile->record_failure(C2Compiler::retry_no_escape_analysis()); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
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diff
changeset
|
2734 return; |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
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1072
diff
changeset
|
2735 } |
5948
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7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
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diff
changeset
|
2736 Node *base = get_map(jobj->idx()); // CheckCastPP node |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2737 if (!split_AddP(n, base)) continue; // wrong type from dead path |
65 | 2738 } else if (n->is_Phi() || |
2739 n->is_CheckCastPP() || | |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
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164
diff
changeset
|
2740 n->is_EncodeP() || |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
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164
diff
changeset
|
2741 n->is_DecodeN() || |
65 | 2742 (n->is_ConstraintCast() && n->Opcode() == Op_CastPP)) { |
0 | 2743 if (visited.test_set(n->_idx)) { |
2744 assert(n->is_Phi(), "loops only through Phi's"); | |
2745 continue; // already processed | |
2746 } | |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2747 JavaObjectNode* jobj = unique_java_object(n); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2748 if (jobj == NULL || jobj == phantom_obj) { |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2749 #ifdef ASSERT |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2750 ptnode_adr(n->_idx)->dump(); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2751 assert(jobj != NULL && jobj != phantom_obj, "escaped allocation"); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2752 #endif |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2753 _compile->record_failure(C2Compiler::retry_no_escape_analysis()); |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2754 return; |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2755 } else { |
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2756 Node *val = get_map(jobj->idx()); // CheckCastPP node |
0 | 2757 TypeNode *tn = n->as_Type(); |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2758 const TypeOopPtr* tinst = igvn->type(val)->isa_oopptr(); |
223 | 2759 assert(tinst != NULL && tinst->is_known_instance() && |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2760 tinst->instance_id() == jobj->idx() , "instance type expected."); |
163 | 2761 |
2762 const Type *tn_type = igvn->type(tn); | |
223 | 2763 const TypeOopPtr *tn_t; |
2764 if (tn_type->isa_narrowoop()) { | |
2765 tn_t = tn_type->make_ptr()->isa_oopptr(); | |
2766 } else { | |
2767 tn_t = tn_type->isa_oopptr(); | |
2768 } | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2769 if (tn_t != NULL && tinst->klass()->is_subtype_of(tn_t->klass())) { |
163 | 2770 if (tn_type->isa_narrowoop()) { |
2771 tn_type = tinst->make_narrowoop(); | |
2772 } else { | |
2773 tn_type = tinst; | |
2774 } | |
0 | 2775 igvn->hash_delete(tn); |
163 | 2776 igvn->set_type(tn, tn_type); |
2777 tn->set_type(tn_type); | |
0 | 2778 igvn->hash_insert(tn); |
65 | 2779 record_for_optimizer(n); |
293
c3e045194476
6731641: assert(m->adr_type() == mach->adr_type(),"matcher should not change adr type")
kvn
parents:
253
diff
changeset
|
2780 } else { |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2781 assert(tn_type == TypePtr::NULL_PTR || |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2782 tn_t != NULL && !tinst->klass()->is_subtype_of(tn_t->klass()), |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2783 "unexpected type"); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2784 continue; // Skip dead path with different type |
0 | 2785 } |
2786 } | |
2787 } else { | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2788 debug_only(n->dump();) |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2789 assert(false, "EA: unexpected node"); |
0 | 2790 continue; |
2791 } | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2792 // push allocation's users on appropriate worklist |
0 | 2793 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { |
2794 Node *use = n->fast_out(i); | |
2795 if(use->is_Mem() && use->in(MemNode::Address) == n) { | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2796 // Load/store to instance's field |
65 | 2797 memnode_worklist.append_if_missing(use); |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2798 } else if (use->is_MemBar()) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2799 memnode_worklist.append_if_missing(use); |
65 | 2800 } else if (use->is_AddP() && use->outcnt() > 0) { // No dead nodes |
2801 Node* addp2 = find_second_addp(use, n); | |
2802 if (addp2 != NULL) { | |
2803 alloc_worklist.append_if_missing(addp2); | |
2804 } | |
2805 alloc_worklist.append_if_missing(use); | |
2806 } else if (use->is_Phi() || | |
2807 use->is_CheckCastPP() || | |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2808 use->is_EncodeP() || |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
164
diff
changeset
|
2809 use->is_DecodeN() || |
65 | 2810 (use->is_ConstraintCast() && use->Opcode() == Op_CastPP)) { |
2811 alloc_worklist.append_if_missing(use); | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2812 #ifdef ASSERT |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2813 } else if (use->is_Mem()) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2814 assert(use->in(MemNode::Address) != n, "EA: missing allocation reference path"); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2815 } else if (use->is_MergeMem()) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2816 assert(_mergemem_worklist.contains(use->as_MergeMem()), "EA: missing MergeMem node in the worklist"); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2817 } else if (use->is_SafePoint()) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2818 // Look for MergeMem nodes for calls which reference unique allocation |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2819 // (through CheckCastPP nodes) even for debug info. |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2820 Node* m = use->in(TypeFunc::Memory); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2821 if (m->is_MergeMem()) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2822 assert(_mergemem_worklist.contains(m->as_MergeMem()), "EA: missing MergeMem node in the worklist"); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2823 } |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2824 } else { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2825 uint op = use->Opcode(); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2826 if (!(op == Op_CmpP || op == Op_Conv2B || |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2827 op == Op_CastP2X || op == Op_StoreCM || |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2828 op == Op_FastLock || op == Op_AryEq || op == Op_StrComp || |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2829 op == Op_StrEquals || op == Op_StrIndexOf)) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2830 n->dump(); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2831 use->dump(); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2832 assert(false, "EA: missing allocation reference path"); |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2833 } |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2834 #endif |
0 | 2835 } |
2836 } | |
2837 | |
2838 } | |
65 | 2839 // New alias types were created in split_AddP(). |
0 | 2840 uint new_index_end = (uint) _compile->num_alias_types(); |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2841 assert(unique_old == _compile->unique(), "there should be no new ideal nodes after Phase 1"); |
0 | 2842 |
2843 // Phase 2: Process MemNode's from memnode_worklist. compute new address type and | |
2844 // compute new values for Memory inputs (the Memory inputs are not | |
2845 // actually updated until phase 4.) | |
2846 if (memnode_worklist.length() == 0) | |
2847 return; // nothing to do | |
2848 while (memnode_worklist.length() != 0) { | |
2849 Node *n = memnode_worklist.pop(); | |
65 | 2850 if (visited.test_set(n->_idx)) |
2851 continue; | |
1100
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2852 if (n->is_Phi() || n->is_ClearArray()) { |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2853 // we don't need to do anything, but the users must be pushed |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2854 } else if (n->is_MemBar()) { // Initialize, MemBar nodes |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2855 // we don't need to do anything, but the users must be pushed |
f96a1a986f7b
6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents:
1072
diff
changeset
|
2856 n = n->as_MemBar()->proj_out(TypeFunc::Memory); |
65 | 2857 if (n == NULL) |
0 | 2858 continue; |
2859 } else { | |
2860 assert(n->is_Mem(), "memory node required."); | |
2861 Node *addr = n->in(MemNode::Address); | |
2862 const Type *addr_t = igvn->type(addr); | |
2863 if (addr_t == Type::TOP) | |
2864 continue; | |
2865 assert (addr_t->isa_ptr() != NULL, "pointer type required."); | |
2866 int alias_idx = _compile->get_alias_index(addr_t->is_ptr()); | |
65 | 2867 assert ((uint)alias_idx < new_index_end, "wrong alias index"); |
5948
ee138854b3a6
7147744: CTW: assert(false) failed: infinite EA connection graph build
kvn
parents:
5901
diff
changeset
|
2868 Node *mem = find_inst_mem(n->in(MemNode::Memory), alias_idx, orig_phis); |
38
b789bcaf2dd9
6667610: (Escape Analysis) retry compilation without EA if it fails
kvn
parents:
0
diff
changeset
|
2869 if (_compile->failing()) { |
b789bcaf2dd9
6667610: (Escape Analysis) retry compilation without EA if it fails
kvn
parents:
0
diff
changeset
|
2870 return; |
b789bcaf2dd9
6667610: (Escape Analysis) retry compilation without EA if it fails
kvn
parents:
0
diff
changeset
|
2871 } |
65 | 2872 if (mem != n->in(MemNode::Memory)) { |
1101
7fee0a6cc6d4
6896727: nsk/logging/LoggingPermission/LoggingPermission/logperm002 fails with G1, EscapeAnalisys
kvn
parents:
1100
diff
changeset
|
2873 // We delay the memory edge update since we need old one in |
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2874 // MergeMem code below when instances memory slices are separated. |
5948
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2875 set_map(n, mem); |
65 | 2876 } |
0 | 2877 if (n->is_Load()) { |
2878 continue; // don't push users | |
2879 } else if (n->is_LoadStore()) { | |
2880 // get the memory projection | |
2881 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
2882 Node *use = n->fast_out(i); | |
2883 if (use->Opcode() == Op_SCMemProj) { | |
2884 n = use; | |
2885 break; | |
2886 } | |
2887 } | |
2888 assert(n->Opcode() == Op_SCMemProj, "memory projection required"); | |
2889 } | |
2890 } | |
2891 // push user on appropriate worklist | |
2892 for (DUIterator_Fast imax, i = n->fast_outs(imax); i < imax; i++) { | |
2893 Node *use = n->fast_out(i); | |
1100
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2894 if (use->is_Phi() || use->is_ClearArray()) { |
65 | 2895 memnode_worklist.append_if_missing(use); |
0 | 2896 } else if(use->is_Mem() && use->in(MemNode::Memory) == n) { |
1100
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2897 if (use->Opcode() == Op_StoreCM) // Ignore cardmark stores |
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2898 continue; |
65 | 2899 memnode_worklist.append_if_missing(use); |
1100
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2900 } else if (use->is_MemBar()) { |
65 | 2901 memnode_worklist.append_if_missing(use); |
1100
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|
2902 #ifdef ASSERT |
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|
2903 } else if(use->is_Mem()) { |
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|
2904 assert(use->in(MemNode::Memory) != n, "EA: missing memory path"); |
0 | 2905 } else if (use->is_MergeMem()) { |
1100
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2906 assert(_mergemem_worklist.contains(use->as_MergeMem()), "EA: missing MergeMem node in the worklist"); |
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|
2907 } else { |
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|
2908 uint op = use->Opcode(); |
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|
2909 if (!(op == Op_StoreCM || |
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2910 (op == Op_CallLeaf && use->as_CallLeaf()->_name != NULL && |
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2911 strcmp(use->as_CallLeaf()->_name, "g1_wb_pre") == 0) || |
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2912 op == Op_AryEq || op == Op_StrComp || |
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2913 op == Op_StrEquals || op == Op_StrIndexOf)) { |
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|
2914 n->dump(); |
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|
2915 use->dump(); |
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|
2916 assert(false, "EA: missing memory path"); |
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|
2917 } |
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|
2918 #endif |
0 | 2919 } |
2920 } | |
2921 } | |
2922 | |
65 | 2923 // Phase 3: Process MergeMem nodes from mergemem_worklist. |
1100
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2924 // Walk each memory slice moving the first node encountered of each |
65 | 2925 // instance type to the the input corresponding to its alias index. |
1100
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2926 uint length = _mergemem_worklist.length(); |
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|
2927 for( uint next = 0; next < length; ++next ) { |
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2928 MergeMemNode* nmm = _mergemem_worklist.at(next); |
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|
2929 assert(!visited.test_set(nmm->_idx), "should not be visited before"); |
0 | 2930 // Note: we don't want to use MergeMemStream here because we only want to |
1100
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|
2931 // scan inputs which exist at the start, not ones we add during processing. |
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2932 // Note 2: MergeMem may already contains instance memory slices added |
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2933 // during find_inst_mem() call when memory nodes were processed above. |
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|
2934 igvn->hash_delete(nmm); |
0 | 2935 uint nslices = nmm->req(); |
2936 for (uint i = Compile::AliasIdxRaw+1; i < nslices; i++) { | |
65 | 2937 Node* mem = nmm->in(i); |
2938 Node* cur = NULL; | |
0 | 2939 if (mem == NULL || mem->is_top()) |
2940 continue; | |
1101
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|
2941 // First, update mergemem by moving memory nodes to corresponding slices |
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|
2942 // if their type became more precise since this mergemem was created. |
0 | 2943 while (mem->is_Mem()) { |
2944 const Type *at = igvn->type(mem->in(MemNode::Address)); | |
2945 if (at != Type::TOP) { | |
2946 assert (at->isa_ptr() != NULL, "pointer type required."); | |
2947 uint idx = (uint)_compile->get_alias_index(at->is_ptr()); | |
2948 if (idx == i) { | |
2949 if (cur == NULL) | |
2950 cur = mem; | |
2951 } else { | |
2952 if (idx >= nmm->req() || nmm->is_empty_memory(nmm->in(idx))) { | |
2953 nmm->set_memory_at(idx, mem); | |
2954 } | |
2955 } | |
2956 } | |
2957 mem = mem->in(MemNode::Memory); | |
2958 } | |
2959 nmm->set_memory_at(i, (cur != NULL) ? cur : mem); | |
65 | 2960 // Find any instance of the current type if we haven't encountered |
1101
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|
2961 // already a memory slice of the instance along the memory chain. |
65 | 2962 for (uint ni = new_index_start; ni < new_index_end; ni++) { |
2963 if((uint)_compile->get_general_index(ni) == i) { | |
2964 Node *m = (ni >= nmm->req()) ? nmm->empty_memory() : nmm->in(ni); | |
2965 if (nmm->is_empty_memory(m)) { | |
5948
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|
2966 Node* result = find_inst_mem(mem, ni, orig_phis); |
65 | 2967 if (_compile->failing()) { |
2968 return; | |
2969 } | |
2970 nmm->set_memory_at(ni, result); | |
2971 } | |
2972 } | |
2973 } | |
2974 } | |
2975 // Find the rest of instances values | |
2976 for (uint ni = new_index_start; ni < new_index_end; ni++) { | |
1101
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|
2977 const TypeOopPtr *tinst = _compile->get_adr_type(ni)->isa_oopptr(); |
65 | 2978 Node* result = step_through_mergemem(nmm, ni, tinst); |
2979 if (result == nmm->base_memory()) { | |
2980 // Didn't find instance memory, search through general slice recursively. | |
1101
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|
2981 result = nmm->memory_at(_compile->get_general_index(ni)); |
5948
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|
2982 result = find_inst_mem(result, ni, orig_phis); |
65 | 2983 if (_compile->failing()) { |
2984 return; | |
2985 } | |
2986 nmm->set_memory_at(ni, result); | |
2987 } | |
2988 } | |
2989 igvn->hash_insert(nmm); | |
2990 record_for_optimizer(nmm); | |
0 | 2991 } |
2992 | |
65 | 2993 // Phase 4: Update the inputs of non-instance memory Phis and |
2994 // the Memory input of memnodes | |
0 | 2995 // First update the inputs of any non-instance Phi's from |
2996 // which we split out an instance Phi. Note we don't have | |
2997 // to recursively process Phi's encounted on the input memory | |
2998 // chains as is done in split_memory_phi() since they will | |
2999 // also be processed here. | |
247 | 3000 for (int j = 0; j < orig_phis.length(); j++) { |
3001 PhiNode *phi = orig_phis.at(j); | |
0 | 3002 int alias_idx = _compile->get_alias_index(phi->adr_type()); |
3003 igvn->hash_delete(phi); | |
3004 for (uint i = 1; i < phi->req(); i++) { | |
3005 Node *mem = phi->in(i); | |
5948
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|
3006 Node *new_mem = find_inst_mem(mem, alias_idx, orig_phis); |
65 | 3007 if (_compile->failing()) { |
3008 return; | |
3009 } | |
0 | 3010 if (mem != new_mem) { |
3011 phi->set_req(i, new_mem); | |
3012 } | |
3013 } | |
3014 igvn->hash_insert(phi); | |
3015 record_for_optimizer(phi); | |
3016 } | |
3017 | |
3018 // Update the memory inputs of MemNodes with the value we computed | |
1101
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|
3019 // in Phase 2 and move stores memory users to corresponding memory slices. |
3278
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|
3020 // Disable memory split verification code until the fix for 6984348. |
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|
3021 // Currently it produces false negative results since it does not cover all cases. |
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|
3022 #if 0 // ifdef ASSERT |
2249 | 3023 visited.Reset(); |
1101
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|
3024 Node_Stack old_mems(arena, _compile->unique() >> 2); |
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|
3025 #endif |
5948
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|
3026 for (uint i = 0; i < ideal_nodes.size(); i++) { |
ee138854b3a6
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|
3027 Node* n = ideal_nodes.at(i); |
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|
3028 Node* nmem = get_map(n->_idx); |
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|
3029 assert(nmem != NULL, "sanity"); |
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|
3030 if (n->is_Mem()) { |
3278
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|
3031 #if 0 // ifdef ASSERT |
5948
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|
3032 Node* old_mem = n->in(MemNode::Memory); |
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|
3033 if (!visited.test_set(old_mem->_idx)) { |
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|
3034 old_mems.push(old_mem, old_mem->outcnt()); |
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|
3035 } |
1101
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|
3036 #endif |
5948
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|
3037 assert(n->in(MemNode::Memory) != nmem, "sanity"); |
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|
3038 if (!n->is_Load()) { |
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|
3039 // Move memory users of a store first. |
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|
3040 move_inst_mem(n, orig_phis); |
0 | 3041 } |
5948
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|
3042 // Now update memory input |
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|
3043 igvn->hash_delete(n); |
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|
3044 n->set_req(MemNode::Memory, nmem); |
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|
3045 igvn->hash_insert(n); |
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|
3046 record_for_optimizer(n); |
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|
3047 } else { |
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|
3048 assert(n->is_Allocate() || n->is_CheckCastPP() || |
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|
3049 n->is_AddP() || n->is_Phi(), "unknown node used for set_map()"); |
0 | 3050 } |
3051 } | |
3278
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|
3052 #if 0 // ifdef ASSERT |
1101
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|
3053 // Verify that memory was split correctly |
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|
3054 while (old_mems.is_nonempty()) { |
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|
3055 Node* old_mem = old_mems.node(); |
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|
3056 uint old_cnt = old_mems.index(); |
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|
3057 old_mems.pop(); |
3278
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|
3058 assert(old_cnt == old_mem->outcnt(), "old mem could be lost"); |
1101
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|
3059 } |
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|
3060 #endif |
0 | 3061 } |
3062 | |
5948
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|
3063 #ifndef PRODUCT |
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|
3064 static const char *node_type_names[] = { |
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|
3065 "UnknownType", |
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|
3066 "JavaObject", |
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|
3067 "LocalVar", |
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|
3068 "Field", |
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|
3069 "Arraycopy" |
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|
3070 }; |
4937
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4777
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|
3071 |
5948
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|
3072 static const char *esc_names[] = { |
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3073 "UnknownEscape", |
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3074 "NoEscape", |
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3075 "ArgEscape", |
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3076 "GlobalEscape" |
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3077 }; |
0 | 3078 |
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3079 void PointsToNode::dump(bool print_state) const { |
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3080 NodeType nt = node_type(); |
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3081 tty->print("%s ", node_type_names[(int) nt]); |
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3082 if (print_state) { |
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3083 EscapeState es = escape_state(); |
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3084 EscapeState fields_es = fields_escape_state(); |
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3085 tty->print("%s(%s) ", esc_names[(int)es], esc_names[(int)fields_es]); |
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3086 if (nt == PointsToNode::JavaObject && !this->scalar_replaceable()) |
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3087 tty->print("NSR"); |
4113 | 3088 } |
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3089 if (is_Field()) { |
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3090 FieldNode* f = (FieldNode*)this; |
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3091 tty->print("("); |
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3092 for (BaseIterator i(f); i.has_next(); i.next()) { |
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3093 PointsToNode* b = i.get(); |
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3094 tty->print(" %d%s", b->idx(),(b->is_JavaObject() ? "P" : "")); |
4763
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3095 } |
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3096 tty->print(" )"); |
0 | 3097 } |
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3098 tty->print("["); |
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3099 for (EdgeIterator i(this); i.has_next(); i.next()) { |
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3100 PointsToNode* e = i.get(); |
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3101 tty->print(" %d%s%s", e->idx(),(e->is_JavaObject() ? "P" : (e->is_Field() ? "F" : "")), e->is_Arraycopy() ? "cp" : ""); |
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3102 } |
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3103 tty->print(" ["); |
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3104 for (UseIterator i(this); i.has_next(); i.next()) { |
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3105 PointsToNode* u = i.get(); |
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3106 bool is_base = false; |
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3107 if (PointsToNode::is_base_use(u)) { |
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3108 is_base = true; |
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3109 u = PointsToNode::get_use_node(u)->as_Field(); |
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3110 } |
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3111 tty->print(" %d%s%s", u->idx(), is_base ? "b" : "", u->is_Arraycopy() ? "cp" : ""); |
4113 | 3112 } |
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3113 tty->print(" ]] "); |
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3114 if (_node == NULL) |
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3115 tty->print_cr("<null>"); |
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3116 else |
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3117 _node->dump(); |
4113 | 3118 } |
3119 | |
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3120 void ConnectionGraph::dump(GrowableArray<PointsToNode*>& ptnodes_worklist) { |
0 | 3121 bool first = true; |
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3122 int ptnodes_length = ptnodes_worklist.length(); |
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3123 for (int i = 0; i < ptnodes_length; i++) { |
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3124 PointsToNode *ptn = ptnodes_worklist.at(i); |
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3125 if (ptn == NULL || !ptn->is_JavaObject()) |
0 | 3126 continue; |
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3127 PointsToNode::EscapeState es = ptn->escape_state(); |
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3128 if (ptn->ideal_node()->is_Allocate() && (es == PointsToNode::NoEscape || Verbose)) { |
65 | 3129 if (first) { |
3130 tty->cr(); | |
3131 tty->print("======== Connection graph for "); | |
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3132 _compile->method()->print_short_name(); |
65 | 3133 tty->cr(); |
3134 first = false; | |
3135 } | |
3136 ptn->dump(); | |
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3137 // Print all locals and fields which reference this allocation |
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3138 for (UseIterator j(ptn); j.has_next(); j.next()) { |
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3139 PointsToNode* use = j.get(); |
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3140 if (use->is_LocalVar()) { |
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3141 use->dump(Verbose); |
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3142 } else if (Verbose) { |
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3143 use->dump(); |
65 | 3144 } |
3145 } | |
3146 tty->cr(); | |
0 | 3147 } |
3148 } | |
3149 } | |
3150 #endif |