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annotate src/share/vm/opto/macro.cpp @ 4778:35acf8f0a2e4

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7128352: assert(obj_node == obj) failed Summary: Compare uncasted object nodes. Reviewed-by: never
author kvn
date Tue, 10 Jan 2012 18:05:38 -0800
parents e9a5e0a812c8
children b0ff910edfc9
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1 /*
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2 * Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "compiler/compileLog.hpp"
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27 #include "libadt/vectset.hpp"
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28 #include "opto/addnode.hpp"
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29 #include "opto/callnode.hpp"
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30 #include "opto/cfgnode.hpp"
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31 #include "opto/compile.hpp"
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32 #include "opto/connode.hpp"
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33 #include "opto/locknode.hpp"
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34 #include "opto/loopnode.hpp"
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35 #include "opto/macro.hpp"
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36 #include "opto/memnode.hpp"
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37 #include "opto/node.hpp"
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38 #include "opto/phaseX.hpp"
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39 #include "opto/rootnode.hpp"
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40 #include "opto/runtime.hpp"
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41 #include "opto/subnode.hpp"
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42 #include "opto/type.hpp"
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43 #include "runtime/sharedRuntime.hpp"
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44
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45
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46 //
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47 // Replace any references to "oldref" in inputs to "use" with "newref".
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48 // Returns the number of replacements made.
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49 //
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50 int PhaseMacroExpand::replace_input(Node *use, Node *oldref, Node *newref) {
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51 int nreplacements = 0;
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52 uint req = use->req();
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53 for (uint j = 0; j < use->len(); j++) {
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54 Node *uin = use->in(j);
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55 if (uin == oldref) {
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56 if (j < req)
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57 use->set_req(j, newref);
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58 else
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59 use->set_prec(j, newref);
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60 nreplacements++;
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61 } else if (j >= req && uin == NULL) {
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62 break;
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63 }
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64 }
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65 return nreplacements;
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66 }
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67
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68 void PhaseMacroExpand::copy_call_debug_info(CallNode *oldcall, CallNode * newcall) {
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69 // Copy debug information and adjust JVMState information
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70 uint old_dbg_start = oldcall->tf()->domain()->cnt();
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71 uint new_dbg_start = newcall->tf()->domain()->cnt();
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72 int jvms_adj = new_dbg_start - old_dbg_start;
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73 assert (new_dbg_start == newcall->req(), "argument count mismatch");
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74
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75 Dict* sosn_map = new Dict(cmpkey,hashkey);
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76 for (uint i = old_dbg_start; i < oldcall->req(); i++) {
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77 Node* old_in = oldcall->in(i);
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78 // Clone old SafePointScalarObjectNodes, adjusting their field contents.
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79 if (old_in != NULL && old_in->is_SafePointScalarObject()) {
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80 SafePointScalarObjectNode* old_sosn = old_in->as_SafePointScalarObject();
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81 uint old_unique = C->unique();
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82 Node* new_in = old_sosn->clone(jvms_adj, sosn_map);
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83 if (old_unique != C->unique()) {
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84 new_in->set_req(0, C->root()); // reset control edge
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85 new_in = transform_later(new_in); // Register new node.
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86 }
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87 old_in = new_in;
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88 }
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89 newcall->add_req(old_in);
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90 }
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91
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92 newcall->set_jvms(oldcall->jvms());
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93 for (JVMState *jvms = newcall->jvms(); jvms != NULL; jvms = jvms->caller()) {
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94 jvms->set_map(newcall);
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95 jvms->set_locoff(jvms->locoff()+jvms_adj);
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96 jvms->set_stkoff(jvms->stkoff()+jvms_adj);
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97 jvms->set_monoff(jvms->monoff()+jvms_adj);
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98 jvms->set_scloff(jvms->scloff()+jvms_adj);
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99 jvms->set_endoff(jvms->endoff()+jvms_adj);
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100 }
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101 }
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102
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103 Node* PhaseMacroExpand::opt_bits_test(Node* ctrl, Node* region, int edge, Node* word, int mask, int bits, bool return_fast_path) {
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104 Node* cmp;
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105 if (mask != 0) {
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106 Node* and_node = transform_later(new (C, 3) AndXNode(word, MakeConX(mask)));
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107 cmp = transform_later(new (C, 3) CmpXNode(and_node, MakeConX(bits)));
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108 } else {
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109 cmp = word;
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110 }
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111 Node* bol = transform_later(new (C, 2) BoolNode(cmp, BoolTest::ne));
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112 IfNode* iff = new (C, 2) IfNode( ctrl, bol, PROB_MIN, COUNT_UNKNOWN );
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113 transform_later(iff);
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114
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115 // Fast path taken.
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116 Node *fast_taken = transform_later( new (C, 1) IfFalseNode(iff) );
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117
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118 // Fast path not-taken, i.e. slow path
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119 Node *slow_taken = transform_later( new (C, 1) IfTrueNode(iff) );
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120
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121 if (return_fast_path) {
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122 region->init_req(edge, slow_taken); // Capture slow-control
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123 return fast_taken;
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124 } else {
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125 region->init_req(edge, fast_taken); // Capture fast-control
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126 return slow_taken;
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127 }
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128 }
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129
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130 //--------------------copy_predefined_input_for_runtime_call--------------------
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131 void PhaseMacroExpand::copy_predefined_input_for_runtime_call(Node * ctrl, CallNode* oldcall, CallNode* call) {
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132 // Set fixed predefined input arguments
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133 call->init_req( TypeFunc::Control, ctrl );
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134 call->init_req( TypeFunc::I_O , oldcall->in( TypeFunc::I_O) );
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135 call->init_req( TypeFunc::Memory , oldcall->in( TypeFunc::Memory ) ); // ?????
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136 call->init_req( TypeFunc::ReturnAdr, oldcall->in( TypeFunc::ReturnAdr ) );
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137 call->init_req( TypeFunc::FramePtr, oldcall->in( TypeFunc::FramePtr ) );
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138 }
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139
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140 //------------------------------make_slow_call---------------------------------
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141 CallNode* PhaseMacroExpand::make_slow_call(CallNode *oldcall, const TypeFunc* slow_call_type, address slow_call, const char* leaf_name, Node* slow_path, Node* parm0, Node* parm1) {
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142
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143 // Slow-path call
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144 int size = slow_call_type->domain()->cnt();
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145 CallNode *call = leaf_name
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146 ? (CallNode*)new (C, size) CallLeafNode ( slow_call_type, slow_call, leaf_name, TypeRawPtr::BOTTOM )
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147 : (CallNode*)new (C, size) CallStaticJavaNode( slow_call_type, slow_call, OptoRuntime::stub_name(slow_call), oldcall->jvms()->bci(), TypeRawPtr::BOTTOM );
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148
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149 // Slow path call has no side-effects, uses few values
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150 copy_predefined_input_for_runtime_call(slow_path, oldcall, call );
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151 if (parm0 != NULL) call->init_req(TypeFunc::Parms+0, parm0);
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152 if (parm1 != NULL) call->init_req(TypeFunc::Parms+1, parm1);
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153 copy_call_debug_info(oldcall, call);
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154 call->set_cnt(PROB_UNLIKELY_MAG(4)); // Same effect as RC_UNCOMMON.
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155 _igvn.replace_node(oldcall, call);
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156 transform_later(call);
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157
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158 return call;
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159 }
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160
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161 void PhaseMacroExpand::extract_call_projections(CallNode *call) {
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162 _fallthroughproj = NULL;
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163 _fallthroughcatchproj = NULL;
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164 _ioproj_fallthrough = NULL;
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165 _ioproj_catchall = NULL;
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166 _catchallcatchproj = NULL;
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167 _memproj_fallthrough = NULL;
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168 _memproj_catchall = NULL;
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169 _resproj = NULL;
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170 for (DUIterator_Fast imax, i = call->fast_outs(imax); i < imax; i++) {
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171 ProjNode *pn = call->fast_out(i)->as_Proj();
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172 switch (pn->_con) {
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173 case TypeFunc::Control:
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174 {
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175 // For Control (fallthrough) and I_O (catch_all_index) we have CatchProj -> Catch -> Proj
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176 _fallthroughproj = pn;
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177 DUIterator_Fast jmax, j = pn->fast_outs(jmax);
a61af66fc99e Initial load
duke
parents:
diff changeset
178 const Node *cn = pn->fast_out(j);
a61af66fc99e Initial load
duke
parents:
diff changeset
179 if (cn->is_Catch()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
180 ProjNode *cpn = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
181 for (DUIterator_Fast kmax, k = cn->fast_outs(kmax); k < kmax; k++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
182 cpn = cn->fast_out(k)->as_Proj();
a61af66fc99e Initial load
duke
parents:
diff changeset
183 assert(cpn->is_CatchProj(), "must be a CatchProjNode");
a61af66fc99e Initial load
duke
parents:
diff changeset
184 if (cpn->_con == CatchProjNode::fall_through_index)
a61af66fc99e Initial load
duke
parents:
diff changeset
185 _fallthroughcatchproj = cpn;
a61af66fc99e Initial load
duke
parents:
diff changeset
186 else {
a61af66fc99e Initial load
duke
parents:
diff changeset
187 assert(cpn->_con == CatchProjNode::catch_all_index, "must be correct index.");
a61af66fc99e Initial load
duke
parents:
diff changeset
188 _catchallcatchproj = cpn;
a61af66fc99e Initial load
duke
parents:
diff changeset
189 }
a61af66fc99e Initial load
duke
parents:
diff changeset
190 }
a61af66fc99e Initial load
duke
parents:
diff changeset
191 }
a61af66fc99e Initial load
duke
parents:
diff changeset
192 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
193 }
a61af66fc99e Initial load
duke
parents:
diff changeset
194 case TypeFunc::I_O:
a61af66fc99e Initial load
duke
parents:
diff changeset
195 if (pn->_is_io_use)
a61af66fc99e Initial load
duke
parents:
diff changeset
196 _ioproj_catchall = pn;
a61af66fc99e Initial load
duke
parents:
diff changeset
197 else
a61af66fc99e Initial load
duke
parents:
diff changeset
198 _ioproj_fallthrough = pn;
a61af66fc99e Initial load
duke
parents:
diff changeset
199 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
200 case TypeFunc::Memory:
a61af66fc99e Initial load
duke
parents:
diff changeset
201 if (pn->_is_io_use)
a61af66fc99e Initial load
duke
parents:
diff changeset
202 _memproj_catchall = pn;
a61af66fc99e Initial load
duke
parents:
diff changeset
203 else
a61af66fc99e Initial load
duke
parents:
diff changeset
204 _memproj_fallthrough = pn;
a61af66fc99e Initial load
duke
parents:
diff changeset
205 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
206 case TypeFunc::Parms:
a61af66fc99e Initial load
duke
parents:
diff changeset
207 _resproj = pn;
a61af66fc99e Initial load
duke
parents:
diff changeset
208 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
209 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
210 assert(false, "unexpected projection from allocation node.");
a61af66fc99e Initial load
duke
parents:
diff changeset
211 }
a61af66fc99e Initial load
duke
parents:
diff changeset
212 }
a61af66fc99e Initial load
duke
parents:
diff changeset
213
a61af66fc99e Initial load
duke
parents:
diff changeset
214 }
a61af66fc99e Initial load
duke
parents:
diff changeset
215
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
216 // Eliminate a card mark sequence. p2x is a ConvP2XNode
851
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
217 void PhaseMacroExpand::eliminate_card_mark(Node* p2x) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
218 assert(p2x->Opcode() == Op_CastP2X, "ConvP2XNode required");
851
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
219 if (!UseG1GC) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
220 // vanilla/CMS post barrier
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
221 Node *shift = p2x->unique_out();
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
222 Node *addp = shift->unique_out();
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
223 for (DUIterator_Last jmin, j = addp->last_outs(jmin); j >= jmin; --j) {
3282
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
224 Node *mem = addp->last_out(j);
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
225 if (UseCondCardMark && mem->is_Load()) {
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
226 assert(mem->Opcode() == Op_LoadB, "unexpected code shape");
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
227 // The load is checking if the card has been written so
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
228 // replace it with zero to fold the test.
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
229 _igvn.replace_node(mem, intcon(0));
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
230 continue;
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
231 }
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
232 assert(mem->is_Store(), "store required");
149bb459be66 7029167: add support for conditional card marks
never
parents: 2100
diff changeset
233 _igvn.replace_node(mem, mem->in(MemNode::Memory));
851
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
234 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
235 } else {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
236 // G1 pre/post barriers
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
237 assert(p2x->outcnt() == 2, "expects 2 users: Xor and URShift nodes");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
238 // It could be only one user, URShift node, in Object.clone() instrinsic
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
239 // but the new allocation is passed to arraycopy stub and it could not
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
240 // be scalar replaced. So we don't check the case.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
241
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
242 // Remove G1 post barrier.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
243
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
244 // Search for CastP2X->Xor->URShift->Cmp path which
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
245 // checks if the store done to a different from the value's region.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
246 // And replace Cmp with #0 (false) to collapse G1 post barrier.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
247 Node* xorx = NULL;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
248 for (DUIterator_Fast imax, i = p2x->fast_outs(imax); i < imax; i++) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
249 Node* u = p2x->fast_out(i);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
250 if (u->Opcode() == Op_XorX) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
251 xorx = u;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
252 break;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
253 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
254 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
255 assert(xorx != NULL, "missing G1 post barrier");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
256 Node* shift = xorx->unique_out();
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
257 Node* cmpx = shift->unique_out();
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
258 assert(cmpx->is_Cmp() && cmpx->unique_out()->is_Bool() &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
259 cmpx->unique_out()->as_Bool()->_test._test == BoolTest::ne,
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
260 "missing region check in G1 post barrier");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
261 _igvn.replace_node(cmpx, makecon(TypeInt::CC_EQ));
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
262
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
263 // Remove G1 pre barrier.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
264
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
265 // Search "if (marking != 0)" check and set it to "false".
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
266 Node* this_region = p2x->in(0);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
267 assert(this_region != NULL, "");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
268 // There is no G1 pre barrier if previous stored value is NULL
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
269 // (for example, after initialization).
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
270 if (this_region->is_Region() && this_region->req() == 3) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
271 int ind = 1;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
272 if (!this_region->in(ind)->is_IfFalse()) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
273 ind = 2;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
274 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
275 if (this_region->in(ind)->is_IfFalse()) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
276 Node* bol = this_region->in(ind)->in(0)->in(1);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
277 assert(bol->is_Bool(), "");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
278 cmpx = bol->in(1);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
279 if (bol->as_Bool()->_test._test == BoolTest::ne &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
280 cmpx->is_Cmp() && cmpx->in(2) == intcon(0) &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
281 cmpx->in(1)->is_Load()) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
282 Node* adr = cmpx->in(1)->as_Load()->in(MemNode::Address);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
283 const int marking_offset = in_bytes(JavaThread::satb_mark_queue_offset() +
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
284 PtrQueue::byte_offset_of_active());
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
285 if (adr->is_AddP() && adr->in(AddPNode::Base) == top() &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
286 adr->in(AddPNode::Address)->Opcode() == Op_ThreadLocal &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
287 adr->in(AddPNode::Offset) == MakeConX(marking_offset)) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
288 _igvn.replace_node(cmpx, makecon(TypeInt::CC_EQ));
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
289 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
290 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
291 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
292 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
293 // Now CastP2X can be removed since it is used only on dead path
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
294 // which currently still alive until igvn optimize it.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
295 assert(p2x->unique_out()->Opcode() == Op_URShiftX, "");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
296 _igvn.replace_node(p2x, top());
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
297 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
298 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
299
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
300 // Search for a memory operation for the specified memory slice.
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
301 static Node *scan_mem_chain(Node *mem, int alias_idx, int offset, Node *start_mem, Node *alloc, PhaseGVN *phase) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
302 Node *orig_mem = mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
303 Node *alloc_mem = alloc->in(TypeFunc::Memory);
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
304 const TypeOopPtr *tinst = phase->C->get_adr_type(alias_idx)->isa_oopptr();
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
305 while (true) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
306 if (mem == alloc_mem || mem == start_mem ) {
605
98cb887364d3 6810672: Comment typos
twisti
parents: 601
diff changeset
307 return mem; // hit one of our sentinels
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
308 } else if (mem->is_MergeMem()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
309 mem = mem->as_MergeMem()->memory_at(alias_idx);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
310 } else if (mem->is_Proj() && mem->as_Proj()->_con == TypeFunc::Memory) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
311 Node *in = mem->in(0);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
312 // we can safely skip over safepoints, calls, locks and membars because we
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
313 // already know that the object is safe to eliminate.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
314 if (in->is_Initialize() && in->as_Initialize()->allocation() == alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
315 return in;
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
316 } else if (in->is_Call()) {
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
317 CallNode *call = in->as_Call();
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
318 if (!call->may_modify(tinst, phase)) {
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
319 mem = call->in(TypeFunc::Memory);
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
320 }
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
321 mem = in->in(TypeFunc::Memory);
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
322 } else if (in->is_MemBar()) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
323 mem = in->in(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
324 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
325 assert(false, "unexpected projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
326 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
327 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
328 const TypePtr* atype = mem->as_Store()->adr_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
329 int adr_idx = Compile::current()->get_alias_index(atype);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
330 if (adr_idx == alias_idx) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
331 assert(atype->isa_oopptr(), "address type must be oopptr");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
332 int adr_offset = atype->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
333 uint adr_iid = atype->is_oopptr()->instance_id();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
334 // Array elements references have the same alias_idx
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
335 // but different offset and different instance_id.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
336 if (adr_offset == offset && adr_iid == alloc->_idx)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
337 return mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
338 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
339 assert(adr_idx == Compile::AliasIdxRaw, "address must match or be raw");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
340 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
341 mem = mem->in(MemNode::Memory);
1100
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
342 } else if (mem->is_ClearArray()) {
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
343 if (!ClearArrayNode::step_through(&mem, alloc->_idx, phase)) {
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
344 // Can not bypass initialization of the instance
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
345 // we are looking.
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
346 debug_only(intptr_t offset;)
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
347 assert(alloc == AllocateNode::Ideal_allocation(mem->in(3), phase, offset), "sanity");
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
348 InitializeNode* init = alloc->as_Allocate()->initialization();
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
349 // We are looking for stored value, return Initialize node
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
350 // or memory edge from Allocate node.
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
351 if (init != NULL)
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
352 return init;
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
353 else
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
354 return alloc->in(TypeFunc::Memory); // It will produce zero value (see callers).
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
355 }
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
356 // Otherwise skip it (the call updated 'mem' value).
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
357 } else if (mem->Opcode() == Op_SCMemProj) {
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
358 assert(mem->in(0)->is_LoadStore(), "sanity");
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
359 const TypePtr* atype = mem->in(0)->in(MemNode::Address)->bottom_type()->is_ptr();
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
360 int adr_idx = Compile::current()->get_alias_index(atype);
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
361 if (adr_idx == alias_idx) {
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
362 assert(false, "Object is not scalar replaceable if a LoadStore node access its field");
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
363 return NULL;
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
364 }
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
365 mem = mem->in(0)->in(MemNode::Memory);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
366 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
367 return mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
368 }
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
369 assert(mem != orig_mem, "dead memory loop");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
370 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
371 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
372
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
373 //
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
374 // Given a Memory Phi, compute a value Phi containing the values from stores
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
375 // on the input paths.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
376 // Note: this function is recursive, its depth is limied by the "level" argument
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
377 // Returns the computed Phi, or NULL if it cannot compute it.
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
378 Node *PhaseMacroExpand::value_from_mem_phi(Node *mem, BasicType ft, const Type *phi_type, const TypeOopPtr *adr_t, Node *alloc, Node_Stack *value_phis, int level) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
379 assert(mem->is_Phi(), "sanity");
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
380 int alias_idx = C->get_alias_index(adr_t);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
381 int offset = adr_t->offset();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
382 int instance_id = adr_t->instance_id();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
383
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
384 // Check if an appropriate value phi already exists.
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
385 Node* region = mem->in(0);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
386 for (DUIterator_Fast kmax, k = region->fast_outs(kmax); k < kmax; k++) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
387 Node* phi = region->fast_out(k);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
388 if (phi->is_Phi() && phi != mem &&
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
389 phi->as_Phi()->is_same_inst_field(phi_type, instance_id, alias_idx, offset)) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
390 return phi;
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
391 }
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
392 }
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
393 // Check if an appropriate new value phi already exists.
3788
e3cbc9ddd434 7044738: Loop unroll optimization causes incorrect result
kvn
parents: 3754
diff changeset
394 Node* new_phi = value_phis->find(mem->_idx);
e3cbc9ddd434 7044738: Loop unroll optimization causes incorrect result
kvn
parents: 3754
diff changeset
395 if (new_phi != NULL)
e3cbc9ddd434 7044738: Loop unroll optimization causes incorrect result
kvn
parents: 3754
diff changeset
396 return new_phi;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
397
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
398 if (level <= 0) {
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
399 return NULL; // Give up: phi tree too deep
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
400 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
401 Node *start_mem = C->start()->proj_out(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
402 Node *alloc_mem = alloc->in(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
403
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
404 uint length = mem->req();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
405 GrowableArray <Node *> values(length, length, NULL);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
406
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
407 // create a new Phi for the value
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
408 PhiNode *phi = new (C, length) PhiNode(mem->in(0), phi_type, NULL, instance_id, alias_idx, offset);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
409 transform_later(phi);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
410 value_phis->push(phi, mem->_idx);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
411
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
412 for (uint j = 1; j < length; j++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
413 Node *in = mem->in(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
414 if (in == NULL || in->is_top()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
415 values.at_put(j, in);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
416 } else {
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
417 Node *val = scan_mem_chain(in, alias_idx, offset, start_mem, alloc, &_igvn);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
418 if (val == start_mem || val == alloc_mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
419 // hit a sentinel, return appropriate 0 value
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
420 values.at_put(j, _igvn.zerocon(ft));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
421 continue;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
422 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
423 if (val->is_Initialize()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
424 val = val->as_Initialize()->find_captured_store(offset, type2aelembytes(ft), &_igvn);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
425 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
426 if (val == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
427 return NULL; // can't find a value on this path
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
428 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
429 if (val == mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
430 values.at_put(j, mem);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
431 } else if (val->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
432 values.at_put(j, val->in(MemNode::ValueIn));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
433 } else if(val->is_Proj() && val->in(0) == alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
434 values.at_put(j, _igvn.zerocon(ft));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
435 } else if (val->is_Phi()) {
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
436 val = value_from_mem_phi(val, ft, phi_type, adr_t, alloc, value_phis, level-1);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
437 if (val == NULL) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
438 return NULL;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
439 }
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
440 values.at_put(j, val);
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
441 } else if (val->Opcode() == Op_SCMemProj) {
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
442 assert(val->in(0)->is_LoadStore(), "sanity");
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
443 assert(false, "Object is not scalar replaceable if a LoadStore node access its field");
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
444 return NULL;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
445 } else {
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
446 #ifdef ASSERT
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
447 val->dump();
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
448 assert(false, "unknown node on this path");
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
449 #endif
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
450 return NULL; // unknown node on this path
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
451 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
452 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
453 }
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
454 // Set Phi's inputs
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
455 for (uint j = 1; j < length; j++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
456 if (values.at(j) == mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
457 phi->init_req(j, phi);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
458 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
459 phi->init_req(j, values.at(j));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
460 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
461 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
462 return phi;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
463 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
464
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
465 // Search the last value stored into the object's field.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
466 Node *PhaseMacroExpand::value_from_mem(Node *sfpt_mem, BasicType ft, const Type *ftype, const TypeOopPtr *adr_t, Node *alloc) {
223
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
467 assert(adr_t->is_known_instance_field(), "instance required");
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
468 int instance_id = adr_t->instance_id();
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
469 assert((uint)instance_id == alloc->_idx, "wrong allocation");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
470
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
471 int alias_idx = C->get_alias_index(adr_t);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
472 int offset = adr_t->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
473 Node *start_mem = C->start()->proj_out(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
474 Node *alloc_ctrl = alloc->in(TypeFunc::Control);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
475 Node *alloc_mem = alloc->in(TypeFunc::Memory);
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
476 Arena *a = Thread::current()->resource_area();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
477 VectorSet visited(a);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
478
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
479
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
480 bool done = sfpt_mem == alloc_mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
481 Node *mem = sfpt_mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
482 while (!done) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
483 if (visited.test_set(mem->_idx)) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
484 return NULL; // found a loop, give up
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
485 }
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
486 mem = scan_mem_chain(mem, alias_idx, offset, start_mem, alloc, &_igvn);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
487 if (mem == start_mem || mem == alloc_mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
488 done = true; // hit a sentinel, return appropriate 0 value
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
489 } else if (mem->is_Initialize()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
490 mem = mem->as_Initialize()->find_captured_store(offset, type2aelembytes(ft), &_igvn);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
491 if (mem == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
492 done = true; // Something go wrong.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
493 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
494 const TypePtr* atype = mem->as_Store()->adr_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
495 assert(C->get_alias_index(atype) == Compile::AliasIdxRaw, "store is correct memory slice");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
496 done = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
497 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
498 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
499 const TypeOopPtr* atype = mem->as_Store()->adr_type()->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
500 assert(atype != NULL, "address type must be oopptr");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
501 assert(C->get_alias_index(atype) == alias_idx &&
223
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
502 atype->is_known_instance_field() && atype->offset() == offset &&
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
503 atype->instance_id() == instance_id, "store is correct memory slice");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
504 done = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
505 } else if (mem->is_Phi()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
506 // try to find a phi's unique input
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
507 Node *unique_input = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
508 Node *top = C->top();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
509 for (uint i = 1; i < mem->req(); i++) {
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
510 Node *n = scan_mem_chain(mem->in(i), alias_idx, offset, start_mem, alloc, &_igvn);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
511 if (n == NULL || n == top || n == mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
512 continue;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
513 } else if (unique_input == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
514 unique_input = n;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
515 } else if (unique_input != n) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
516 unique_input = top;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
517 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
518 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
519 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
520 if (unique_input != NULL && unique_input != top) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
521 mem = unique_input;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
522 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
523 done = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
524 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
525 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
526 assert(false, "unexpected node");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
527 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
528 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
529 if (mem != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
530 if (mem == start_mem || mem == alloc_mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
531 // hit a sentinel, return appropriate 0 value
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
532 return _igvn.zerocon(ft);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
533 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
534 return mem->in(MemNode::ValueIn);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
535 } else if (mem->is_Phi()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
536 // attempt to produce a Phi reflecting the values on the input paths of the Phi
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
537 Node_Stack value_phis(a, 8);
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
538 Node * phi = value_from_mem_phi(mem, ft, ftype, adr_t, alloc, &value_phis, ValueSearchLimit);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
539 if (phi != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
540 return phi;
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
541 } else {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
542 // Kill all new Phis
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
543 while(value_phis.is_nonempty()) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
544 Node* n = value_phis.node();
1621
6027dddc26c6 6677629: PhaseIterGVN::subsume_node() should call hash_delete() and add_users_to_worklist()
kvn
parents: 1609
diff changeset
545 _igvn.replace_node(n, C->top());
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
546 value_phis.pop();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
547 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
548 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
549 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
550 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
551 // Something go wrong.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
552 return NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
553 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
554
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
555 // Check the possibility of scalar replacement.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
556 bool PhaseMacroExpand::can_eliminate_allocation(AllocateNode *alloc, GrowableArray <SafePointNode *>& safepoints) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
557 // Scan the uses of the allocation to check for anything that would
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
558 // prevent us from eliminating it.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
559 NOT_PRODUCT( const char* fail_eliminate = NULL; )
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
560 DEBUG_ONLY( Node* disq_node = NULL; )
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
561 bool can_eliminate = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
562
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
563 Node* res = alloc->result_cast();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
564 const TypeOopPtr* res_type = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
565 if (res == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
566 // All users were eliminated.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
567 } else if (!res->is_CheckCastPP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
568 NOT_PRODUCT(fail_eliminate = "Allocation does not have unique CheckCastPP";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
569 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
570 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
571 res_type = _igvn.type(res)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
572 if (res_type == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
573 NOT_PRODUCT(fail_eliminate = "Neither instance or array allocation";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
574 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
575 } else if (res_type->isa_aryptr()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
576 int length = alloc->in(AllocateNode::ALength)->find_int_con(-1);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
577 if (length < 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
578 NOT_PRODUCT(fail_eliminate = "Array's size is not constant";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
579 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
580 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
581 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
582 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
583
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
584 if (can_eliminate && res != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
585 for (DUIterator_Fast jmax, j = res->fast_outs(jmax);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
586 j < jmax && can_eliminate; j++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
587 Node* use = res->fast_out(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
588
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
589 if (use->is_AddP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
590 const TypePtr* addp_type = _igvn.type(use)->is_ptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
591 int offset = addp_type->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
592
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
593 if (offset == Type::OffsetTop || offset == Type::OffsetBot) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
594 NOT_PRODUCT(fail_eliminate = "Undefined field referrence";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
595 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
596 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
597 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
598 for (DUIterator_Fast kmax, k = use->fast_outs(kmax);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
599 k < kmax && can_eliminate; k++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
600 Node* n = use->fast_out(k);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
601 if (!n->is_Store() && n->Opcode() != Op_CastP2X) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
602 DEBUG_ONLY(disq_node = n;)
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
603 if (n->is_Load() || n->is_LoadStore()) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
604 NOT_PRODUCT(fail_eliminate = "Field load";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
605 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
606 NOT_PRODUCT(fail_eliminate = "Not store field referrence";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
607 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
608 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
609 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
610 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
611 } else if (use->is_SafePoint()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
612 SafePointNode* sfpt = use->as_SafePoint();
168
7793bd37a336 6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents: 163
diff changeset
613 if (sfpt->is_Call() && sfpt->as_Call()->has_non_debug_use(res)) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
614 // Object is passed as argument.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
615 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
616 NOT_PRODUCT(fail_eliminate = "Object is passed as argument";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
617 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
618 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
619 Node* sfptMem = sfpt->memory();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
620 if (sfptMem == NULL || sfptMem->is_top()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
621 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
622 NOT_PRODUCT(fail_eliminate = "NULL or TOP memory";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
623 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
624 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
625 safepoints.append_if_missing(sfpt);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
626 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
627 } else if (use->Opcode() != Op_CastP2X) { // CastP2X is used by card mark
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
628 if (use->is_Phi()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
629 if (use->outcnt() == 1 && use->unique_out()->Opcode() == Op_Return) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
630 NOT_PRODUCT(fail_eliminate = "Object is return value";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
631 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
632 NOT_PRODUCT(fail_eliminate = "Object is referenced by Phi";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
633 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
634 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
635 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
636 if (use->Opcode() == Op_Return) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
637 NOT_PRODUCT(fail_eliminate = "Object is return value";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
638 }else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
639 NOT_PRODUCT(fail_eliminate = "Object is referenced by node";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
640 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
641 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
642 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
643 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
644 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
645 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
646 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
647
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
648 #ifndef PRODUCT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
649 if (PrintEliminateAllocations) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
650 if (can_eliminate) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
651 tty->print("Scalar ");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
652 if (res == NULL)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
653 alloc->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
654 else
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
655 res->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
656 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
657 tty->print("NotScalar (%s)", fail_eliminate);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
658 if (res == NULL)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
659 alloc->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
660 else
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
661 res->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
662 #ifdef ASSERT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
663 if (disq_node != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
664 tty->print(" >>>> ");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
665 disq_node->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
666 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
667 #endif /*ASSERT*/
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
668 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
669 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
670 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
671 return can_eliminate;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
672 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
673
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
674 // Do scalar replacement.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
675 bool PhaseMacroExpand::scalar_replacement(AllocateNode *alloc, GrowableArray <SafePointNode *>& safepoints) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
676 GrowableArray <SafePointNode *> safepoints_done;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
677
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
678 ciKlass* klass = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
679 ciInstanceKlass* iklass = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
680 int nfields = 0;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
681 int array_base;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
682 int element_size;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
683 BasicType basic_elem_type;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
684 ciType* elem_type;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
685
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
686 Node* res = alloc->result_cast();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
687 const TypeOopPtr* res_type = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
688 if (res != NULL) { // Could be NULL when there are no users
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
689 res_type = _igvn.type(res)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
690 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
691
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
692 if (res != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
693 klass = res_type->klass();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
694 if (res_type->isa_instptr()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
695 // find the fields of the class which will be needed for safepoint debug information
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
696 assert(klass->is_instance_klass(), "must be an instance klass.");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
697 iklass = klass->as_instance_klass();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
698 nfields = iklass->nof_nonstatic_fields();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
699 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
700 // find the array's elements which will be needed for safepoint debug information
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
701 nfields = alloc->in(AllocateNode::ALength)->find_int_con(-1);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
702 assert(klass->is_array_klass() && nfields >= 0, "must be an array klass.");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
703 elem_type = klass->as_array_klass()->element_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
704 basic_elem_type = elem_type->basic_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
705 array_base = arrayOopDesc::base_offset_in_bytes(basic_elem_type);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
706 element_size = type2aelembytes(basic_elem_type);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
707 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
708 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
709 //
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
710 // Process the safepoint uses
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
711 //
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
712 while (safepoints.length() > 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
713 SafePointNode* sfpt = safepoints.pop();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
714 Node* mem = sfpt->memory();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
715 uint first_ind = sfpt->req();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
716 SafePointScalarObjectNode* sobj = new (C, 1) SafePointScalarObjectNode(res_type,
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
717 #ifdef ASSERT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
718 alloc,
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
719 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
720 first_ind, nfields);
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
721 sobj->init_req(0, C->root());
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
722 transform_later(sobj);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
723
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
724 // Scan object's fields adding an input to the safepoint for each field.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
725 for (int j = 0; j < nfields; j++) {
306
af945ba2e739 6741738: TypePtr::add_offset() set incorrect offset when the add overflows
kvn
parents: 253
diff changeset
726 intptr_t offset;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
727 ciField* field = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
728 if (iklass != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
729 field = iklass->nonstatic_field_at(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
730 offset = field->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
731 elem_type = field->type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
732 basic_elem_type = field->layout_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
733 } else {
306
af945ba2e739 6741738: TypePtr::add_offset() set incorrect offset when the add overflows
kvn
parents: 253
diff changeset
734 offset = array_base + j * (intptr_t)element_size;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
735 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
736
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
737 const Type *field_type;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
738 // The next code is taken from Parse::do_get_xxx().
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
739 if (basic_elem_type == T_OBJECT || basic_elem_type == T_ARRAY) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
740 if (!elem_type->is_loaded()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
741 field_type = TypeInstPtr::BOTTOM;
1682
e5dfb3ccb88b 6969569: assert(is_static() && is_constant()) failed: illegal call to constant_value()
kvn
parents: 1621
diff changeset
742 } else if (field != NULL && field->is_constant() && field->is_static()) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
743 // This can happen if the constant oop is non-perm.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
744 ciObject* con = field->constant_value().as_object();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
745 // Do not "join" in the previous type; it doesn't add value,
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
746 // and may yield a vacuous result if the field is of interface type.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
747 field_type = TypeOopPtr::make_from_constant(con)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
748 assert(field_type != NULL, "field singleton type must be consistent");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
749 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
750 field_type = TypeOopPtr::make_from_klass(elem_type->as_klass());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
751 }
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
752 if (UseCompressedOops) {
221
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
753 field_type = field_type->make_narrowoop();
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
754 basic_elem_type = T_NARROWOOP;
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
755 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
756 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
757 field_type = Type::get_const_basic_type(basic_elem_type);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
758 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
759
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
760 const TypeOopPtr *field_addr_type = res_type->add_offset(offset)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
761
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
762 Node *field_val = value_from_mem(mem, basic_elem_type, field_type, field_addr_type, alloc);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
763 if (field_val == NULL) {
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
764 // We weren't able to find a value for this field,
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
765 // give up on eliminating this allocation.
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
766
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
767 // Remove any extra entries we added to the safepoint.
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
768 uint last = sfpt->req() - 1;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
769 for (int k = 0; k < j; k++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
770 sfpt->del_req(last--);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
771 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
772 // rollback processed safepoints
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
773 while (safepoints_done.length() > 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
774 SafePointNode* sfpt_done = safepoints_done.pop();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
775 // remove any extra entries we added to the safepoint
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
776 last = sfpt_done->req() - 1;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
777 for (int k = 0; k < nfields; k++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
778 sfpt_done->del_req(last--);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
779 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
780 JVMState *jvms = sfpt_done->jvms();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
781 jvms->set_endoff(sfpt_done->req());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
782 // Now make a pass over the debug information replacing any references
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
783 // to SafePointScalarObjectNode with the allocated object.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
784 int start = jvms->debug_start();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
785 int end = jvms->debug_end();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
786 for (int i = start; i < end; i++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
787 if (sfpt_done->in(i)->is_SafePointScalarObject()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
788 SafePointScalarObjectNode* scobj = sfpt_done->in(i)->as_SafePointScalarObject();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
789 if (scobj->first_index() == sfpt_done->req() &&
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
790 scobj->n_fields() == (uint)nfields) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
791 assert(scobj->alloc() == alloc, "sanity");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
792 sfpt_done->set_req(i, res);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
793 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
794 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
795 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
796 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
797 #ifndef PRODUCT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
798 if (PrintEliminateAllocations) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
799 if (field != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
800 tty->print("=== At SafePoint node %d can't find value of Field: ",
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
801 sfpt->_idx);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
802 field->print();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
803 int field_idx = C->get_alias_index(field_addr_type);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
804 tty->print(" (alias_idx=%d)", field_idx);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
805 } else { // Array's element
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
806 tty->print("=== At SafePoint node %d can't find value of array element [%d]",
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
807 sfpt->_idx, j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
808 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
809 tty->print(", which prevents elimination of: ");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
810 if (res == NULL)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
811 alloc->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
812 else
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
813 res->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
814 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
815 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
816 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
817 }
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
818 if (UseCompressedOops && field_type->isa_narrowoop()) {
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
819 // Enable "DecodeN(EncodeP(Allocate)) --> Allocate" transformation
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
820 // to be able scalar replace the allocation.
221
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
821 if (field_val->is_EncodeP()) {
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
822 field_val = field_val->in(1);
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
823 } else {
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
824 field_val = transform_later(new (C, 2) DecodeNNode(field_val, field_val->bottom_type()->make_ptr()));
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
825 }
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
826 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
827 sfpt->add_req(field_val);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
828 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
829 JVMState *jvms = sfpt->jvms();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
830 jvms->set_endoff(sfpt->req());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
831 // Now make a pass over the debug information replacing any references
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
832 // to the allocated object with "sobj"
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
833 int start = jvms->debug_start();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
834 int end = jvms->debug_end();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
835 for (int i = start; i < end; i++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
836 if (sfpt->in(i) == res) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
837 sfpt->set_req(i, sobj);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
838 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
839 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
840 safepoints_done.append_if_missing(sfpt); // keep it for rollback
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
841 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
842 return true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
843 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
844
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
845 // Process users of eliminated allocation.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
846 void PhaseMacroExpand::process_users_of_allocation(AllocateNode *alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
847 Node* res = alloc->result_cast();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
848 if (res != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
849 for (DUIterator_Last jmin, j = res->last_outs(jmin); j >= jmin; ) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
850 Node *use = res->last_out(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
851 uint oc1 = res->outcnt();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
852
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
853 if (use->is_AddP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
854 for (DUIterator_Last kmin, k = use->last_outs(kmin); k >= kmin; ) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
855 Node *n = use->last_out(k);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
856 uint oc2 = use->outcnt();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
857 if (n->is_Store()) {
1100
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
858 #ifdef ASSERT
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
859 // Verify that there is no dependent MemBarVolatile nodes,
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
860 // they should be removed during IGVN, see MemBarNode::Ideal().
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
861 for (DUIterator_Fast pmax, p = n->fast_outs(pmax);
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
862 p < pmax; p++) {
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
863 Node* mb = n->fast_out(p);
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
864 assert(mb->is_Initialize() || !mb->is_MemBar() ||
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
865 mb->req() <= MemBarNode::Precedent ||
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
866 mb->in(MemBarNode::Precedent) != n,
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
867 "MemBarVolatile should be eliminated for non-escaping object");
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
868 }
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
869 #endif
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
870 _igvn.replace_node(n, n->in(MemNode::Memory));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
871 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
872 eliminate_card_mark(n);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
873 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
874 k -= (oc2 - use->outcnt());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
875 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
876 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
877 eliminate_card_mark(use);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
878 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
879 j -= (oc1 - res->outcnt());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
880 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
881 assert(res->outcnt() == 0, "all uses of allocated objects must be deleted");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
882 _igvn.remove_dead_node(res);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
883 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
884
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
885 //
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
886 // Process other users of allocation's projections
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
887 //
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
888 if (_resproj != NULL && _resproj->outcnt() != 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
889 for (DUIterator_Last jmin, j = _resproj->last_outs(jmin); j >= jmin; ) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
890 Node *use = _resproj->last_out(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
891 uint oc1 = _resproj->outcnt();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
892 if (use->is_Initialize()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
893 // Eliminate Initialize node.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
894 InitializeNode *init = use->as_Initialize();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
895 assert(init->outcnt() <= 2, "only a control and memory projection expected");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
896 Node *ctrl_proj = init->proj_out(TypeFunc::Control);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
897 if (ctrl_proj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
898 assert(init->in(TypeFunc::Control) == _fallthroughcatchproj, "allocation control projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
899 _igvn.replace_node(ctrl_proj, _fallthroughcatchproj);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
900 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
901 Node *mem_proj = init->proj_out(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
902 if (mem_proj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
903 Node *mem = init->in(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
904 #ifdef ASSERT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
905 if (mem->is_MergeMem()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
906 assert(mem->in(TypeFunc::Memory) == _memproj_fallthrough, "allocation memory projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
907 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
908 assert(mem == _memproj_fallthrough, "allocation memory projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
909 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
910 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
911 _igvn.replace_node(mem_proj, mem);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
912 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
913 } else if (use->is_AddP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
914 // raw memory addresses used only by the initialization
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
915 _igvn.replace_node(use, C->top());
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
916 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
917 assert(false, "only Initialize or AddP expected");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
918 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
919 j -= (oc1 - _resproj->outcnt());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
920 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
921 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
922 if (_fallthroughcatchproj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
923 _igvn.replace_node(_fallthroughcatchproj, alloc->in(TypeFunc::Control));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
924 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
925 if (_memproj_fallthrough != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
926 _igvn.replace_node(_memproj_fallthrough, alloc->in(TypeFunc::Memory));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
927 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
928 if (_memproj_catchall != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
929 _igvn.replace_node(_memproj_catchall, C->top());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
930 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
931 if (_ioproj_fallthrough != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
932 _igvn.replace_node(_ioproj_fallthrough, alloc->in(TypeFunc::I_O));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
933 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
934 if (_ioproj_catchall != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
935 _igvn.replace_node(_ioproj_catchall, C->top());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
936 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
937 if (_catchallcatchproj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
938 _igvn.replace_node(_catchallcatchproj, C->top());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
939 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
940 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
941
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
942 bool PhaseMacroExpand::eliminate_allocate_node(AllocateNode *alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
943
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
944 if (!EliminateAllocations || !alloc->_is_scalar_replaceable) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
945 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
946 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
947
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
948 extract_call_projections(alloc);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
949
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
950 GrowableArray <SafePointNode *> safepoints;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
951 if (!can_eliminate_allocation(alloc, safepoints)) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
952 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
953 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
954
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
955 if (!scalar_replacement(alloc, safepoints)) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
956 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
957 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
958
1080
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
959 CompileLog* log = C->log();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
960 if (log != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
961 Node* klass = alloc->in(AllocateNode::KlassNode);
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
962 const TypeKlassPtr* tklass = _igvn.type(klass)->is_klassptr();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
963 log->head("eliminate_allocation type='%d'",
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
964 log->identify(tklass->klass()));
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
965 JVMState* p = alloc->jvms();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
966 while (p != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
967 log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method()));
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
968 p = p->caller();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
969 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
970 log->tail("eliminate_allocation");
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
971 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
972
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
973 process_users_of_allocation(alloc);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
974
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
975 #ifndef PRODUCT
1080
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
976 if (PrintEliminateAllocations) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
977 if (alloc->is_AllocateArray())
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
978 tty->print_cr("++++ Eliminated: %d AllocateArray", alloc->_idx);
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
979 else
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
980 tty->print_cr("++++ Eliminated: %d Allocate", alloc->_idx);
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
981 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
982 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
983
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
984 return true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
985 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
986
0
a61af66fc99e Initial load
duke
parents:
diff changeset
987
a61af66fc99e Initial load
duke
parents:
diff changeset
988 //---------------------------set_eden_pointers-------------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
989 void PhaseMacroExpand::set_eden_pointers(Node* &eden_top_adr, Node* &eden_end_adr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
990 if (UseTLAB) { // Private allocation: load from TLS
a61af66fc99e Initial load
duke
parents:
diff changeset
991 Node* thread = transform_later(new (C, 1) ThreadLocalNode());
a61af66fc99e Initial load
duke
parents:
diff changeset
992 int tlab_top_offset = in_bytes(JavaThread::tlab_top_offset());
a61af66fc99e Initial load
duke
parents:
diff changeset
993 int tlab_end_offset = in_bytes(JavaThread::tlab_end_offset());
a61af66fc99e Initial load
duke
parents:
diff changeset
994 eden_top_adr = basic_plus_adr(top()/*not oop*/, thread, tlab_top_offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
995 eden_end_adr = basic_plus_adr(top()/*not oop*/, thread, tlab_end_offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
996 } else { // Shared allocation: load from globals
a61af66fc99e Initial load
duke
parents:
diff changeset
997 CollectedHeap* ch = Universe::heap();
a61af66fc99e Initial load
duke
parents:
diff changeset
998 address top_adr = (address)ch->top_addr();
a61af66fc99e Initial load
duke
parents:
diff changeset
999 address end_adr = (address)ch->end_addr();
a61af66fc99e Initial load
duke
parents:
diff changeset
1000 eden_top_adr = makecon(TypeRawPtr::make(top_adr));
a61af66fc99e Initial load
duke
parents:
diff changeset
1001 eden_end_adr = basic_plus_adr(eden_top_adr, end_adr - top_adr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1002 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1003 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1004
a61af66fc99e Initial load
duke
parents:
diff changeset
1005
a61af66fc99e Initial load
duke
parents:
diff changeset
1006 Node* PhaseMacroExpand::make_load(Node* ctl, Node* mem, Node* base, int offset, const Type* value_type, BasicType bt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1007 Node* adr = basic_plus_adr(base, offset);
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1008 const TypePtr* adr_type = adr->bottom_type()->is_ptr();
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
1009 Node* value = LoadNode::make(_igvn, ctl, mem, adr, adr_type, value_type, bt);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1010 transform_later(value);
a61af66fc99e Initial load
duke
parents:
diff changeset
1011 return value;
a61af66fc99e Initial load
duke
parents:
diff changeset
1012 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1013
a61af66fc99e Initial load
duke
parents:
diff changeset
1014
a61af66fc99e Initial load
duke
parents:
diff changeset
1015 Node* PhaseMacroExpand::make_store(Node* ctl, Node* mem, Node* base, int offset, Node* value, BasicType bt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1016 Node* adr = basic_plus_adr(base, offset);
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
1017 mem = StoreNode::make(_igvn, ctl, mem, adr, NULL, value, bt);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1018 transform_later(mem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1019 return mem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1020 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1021
a61af66fc99e Initial load
duke
parents:
diff changeset
1022 //=============================================================================
a61af66fc99e Initial load
duke
parents:
diff changeset
1023 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1024 // A L L O C A T I O N
a61af66fc99e Initial load
duke
parents:
diff changeset
1025 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1026 // Allocation attempts to be fast in the case of frequent small objects.
a61af66fc99e Initial load
duke
parents:
diff changeset
1027 // It breaks down like this:
a61af66fc99e Initial load
duke
parents:
diff changeset
1028 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1029 // 1) Size in doublewords is computed. This is a constant for objects and
a61af66fc99e Initial load
duke
parents:
diff changeset
1030 // variable for most arrays. Doubleword units are used to avoid size
a61af66fc99e Initial load
duke
parents:
diff changeset
1031 // overflow of huge doubleword arrays. We need doublewords in the end for
a61af66fc99e Initial load
duke
parents:
diff changeset
1032 // rounding.
a61af66fc99e Initial load
duke
parents:
diff changeset
1033 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1034 // 2) Size is checked for being 'too large'. Too-large allocations will go
a61af66fc99e Initial load
duke
parents:
diff changeset
1035 // the slow path into the VM. The slow path can throw any required
a61af66fc99e Initial load
duke
parents:
diff changeset
1036 // exceptions, and does all the special checks for very large arrays. The
a61af66fc99e Initial load
duke
parents:
diff changeset
1037 // size test can constant-fold away for objects. For objects with
a61af66fc99e Initial load
duke
parents:
diff changeset
1038 // finalizers it constant-folds the otherway: you always go slow with
a61af66fc99e Initial load
duke
parents:
diff changeset
1039 // finalizers.
a61af66fc99e Initial load
duke
parents:
diff changeset
1040 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1041 // 3) If NOT using TLABs, this is the contended loop-back point.
a61af66fc99e Initial load
duke
parents:
diff changeset
1042 // Load-Locked the heap top. If using TLABs normal-load the heap top.
a61af66fc99e Initial load
duke
parents:
diff changeset
1043 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1044 // 4) Check that heap top + size*8 < max. If we fail go the slow ` route.
a61af66fc99e Initial load
duke
parents:
diff changeset
1045 // NOTE: "top+size*8" cannot wrap the 4Gig line! Here's why: for largish
a61af66fc99e Initial load
duke
parents:
diff changeset
1046 // "size*8" we always enter the VM, where "largish" is a constant picked small
a61af66fc99e Initial load
duke
parents:
diff changeset
1047 // enough that there's always space between the eden max and 4Gig (old space is
a61af66fc99e Initial load
duke
parents:
diff changeset
1048 // there so it's quite large) and large enough that the cost of entering the VM
a61af66fc99e Initial load
duke
parents:
diff changeset
1049 // is dwarfed by the cost to initialize the space.
a61af66fc99e Initial load
duke
parents:
diff changeset
1050 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1051 // 5) If NOT using TLABs, Store-Conditional the adjusted heap top back
a61af66fc99e Initial load
duke
parents:
diff changeset
1052 // down. If contended, repeat at step 3. If using TLABs normal-store
a61af66fc99e Initial load
duke
parents:
diff changeset
1053 // adjusted heap top back down; there is no contention.
a61af66fc99e Initial load
duke
parents:
diff changeset
1054 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1055 // 6) If !ZeroTLAB then Bulk-clear the object/array. Fill in klass & mark
a61af66fc99e Initial load
duke
parents:
diff changeset
1056 // fields.
a61af66fc99e Initial load
duke
parents:
diff changeset
1057 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1058 // 7) Merge with the slow-path; cast the raw memory pointer to the correct
a61af66fc99e Initial load
duke
parents:
diff changeset
1059 // oop flavor.
a61af66fc99e Initial load
duke
parents:
diff changeset
1060 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1061 //=============================================================================
a61af66fc99e Initial load
duke
parents:
diff changeset
1062 // FastAllocateSizeLimit value is in DOUBLEWORDS.
a61af66fc99e Initial load
duke
parents:
diff changeset
1063 // Allocations bigger than this always go the slow route.
a61af66fc99e Initial load
duke
parents:
diff changeset
1064 // This value must be small enough that allocation attempts that need to
a61af66fc99e Initial load
duke
parents:
diff changeset
1065 // trigger exceptions go the slow route. Also, it must be small enough so
a61af66fc99e Initial load
duke
parents:
diff changeset
1066 // that heap_top + size_in_bytes does not wrap around the 4Gig limit.
a61af66fc99e Initial load
duke
parents:
diff changeset
1067 //=============================================================================j//
a61af66fc99e Initial load
duke
parents:
diff changeset
1068 // %%% Here is an old comment from parseHelper.cpp; is it outdated?
a61af66fc99e Initial load
duke
parents:
diff changeset
1069 // The allocator will coalesce int->oop copies away. See comment in
a61af66fc99e Initial load
duke
parents:
diff changeset
1070 // coalesce.cpp about how this works. It depends critically on the exact
a61af66fc99e Initial load
duke
parents:
diff changeset
1071 // code shape produced here, so if you are changing this code shape
a61af66fc99e Initial load
duke
parents:
diff changeset
1072 // make sure the GC info for the heap-top is correct in and around the
a61af66fc99e Initial load
duke
parents:
diff changeset
1073 // slow-path call.
a61af66fc99e Initial load
duke
parents:
diff changeset
1074 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1075
a61af66fc99e Initial load
duke
parents:
diff changeset
1076 void PhaseMacroExpand::expand_allocate_common(
a61af66fc99e Initial load
duke
parents:
diff changeset
1077 AllocateNode* alloc, // allocation node to be expanded
a61af66fc99e Initial load
duke
parents:
diff changeset
1078 Node* length, // array length for an array allocation
a61af66fc99e Initial load
duke
parents:
diff changeset
1079 const TypeFunc* slow_call_type, // Type of slow call
a61af66fc99e Initial load
duke
parents:
diff changeset
1080 address slow_call_address // Address of slow call
a61af66fc99e Initial load
duke
parents:
diff changeset
1081 )
a61af66fc99e Initial load
duke
parents:
diff changeset
1082 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1083
a61af66fc99e Initial load
duke
parents:
diff changeset
1084 Node* ctrl = alloc->in(TypeFunc::Control);
a61af66fc99e Initial load
duke
parents:
diff changeset
1085 Node* mem = alloc->in(TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1086 Node* i_o = alloc->in(TypeFunc::I_O);
a61af66fc99e Initial load
duke
parents:
diff changeset
1087 Node* size_in_bytes = alloc->in(AllocateNode::AllocSize);
a61af66fc99e Initial load
duke
parents:
diff changeset
1088 Node* klass_node = alloc->in(AllocateNode::KlassNode);
a61af66fc99e Initial load
duke
parents:
diff changeset
1089 Node* initial_slow_test = alloc->in(AllocateNode::InitialTest);
a61af66fc99e Initial load
duke
parents:
diff changeset
1090
4763
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1091 Node* storestore = alloc->storestore();
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1092 if (storestore != NULL) {
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1093 // Break this link that is no longer useful and confuses register allocation
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1094 storestore->set_req(MemBarNode::Precedent, top());
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1095 }
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1096
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1097 assert(ctrl != NULL, "must have control");
a61af66fc99e Initial load
duke
parents:
diff changeset
1098 // We need a Region and corresponding Phi's to merge the slow-path and fast-path results.
a61af66fc99e Initial load
duke
parents:
diff changeset
1099 // they will not be used if "always_slow" is set
a61af66fc99e Initial load
duke
parents:
diff changeset
1100 enum { slow_result_path = 1, fast_result_path = 2 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1101 Node *result_region;
a61af66fc99e Initial load
duke
parents:
diff changeset
1102 Node *result_phi_rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1103 Node *result_phi_rawoop;
a61af66fc99e Initial load
duke
parents:
diff changeset
1104 Node *result_phi_i_o;
a61af66fc99e Initial load
duke
parents:
diff changeset
1105
a61af66fc99e Initial load
duke
parents:
diff changeset
1106 // The initial slow comparison is a size check, the comparison
a61af66fc99e Initial load
duke
parents:
diff changeset
1107 // we want to do is a BoolTest::gt
a61af66fc99e Initial load
duke
parents:
diff changeset
1108 bool always_slow = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1109 int tv = _igvn.find_int_con(initial_slow_test, -1);
a61af66fc99e Initial load
duke
parents:
diff changeset
1110 if (tv >= 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1111 always_slow = (tv == 1);
a61af66fc99e Initial load
duke
parents:
diff changeset
1112 initial_slow_test = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1113 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1114 initial_slow_test = BoolNode::make_predicate(initial_slow_test, &_igvn);
a61af66fc99e Initial load
duke
parents:
diff changeset
1115 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1116
780
c96bf21b756f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 708
diff changeset
1117 if (C->env()->dtrace_alloc_probes() ||
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1118 !UseTLAB && (!Universe::heap()->supports_inline_contig_alloc() ||
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1119 (UseConcMarkSweepGC && CMSIncrementalMode))) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1120 // Force slow-path allocation
a61af66fc99e Initial load
duke
parents:
diff changeset
1121 always_slow = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1122 initial_slow_test = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1123 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1124
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1125
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1126 enum { too_big_or_final_path = 1, need_gc_path = 2 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1127 Node *slow_region = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1128 Node *toobig_false = ctrl;
a61af66fc99e Initial load
duke
parents:
diff changeset
1129
a61af66fc99e Initial load
duke
parents:
diff changeset
1130 assert (initial_slow_test == NULL || !always_slow, "arguments must be consistent");
a61af66fc99e Initial load
duke
parents:
diff changeset
1131 // generate the initial test if necessary
a61af66fc99e Initial load
duke
parents:
diff changeset
1132 if (initial_slow_test != NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1133 slow_region = new (C, 3) RegionNode(3);
a61af66fc99e Initial load
duke
parents:
diff changeset
1134
a61af66fc99e Initial load
duke
parents:
diff changeset
1135 // Now make the initial failure test. Usually a too-big test but
a61af66fc99e Initial load
duke
parents:
diff changeset
1136 // might be a TRUE for finalizers or a fancy class check for
a61af66fc99e Initial load
duke
parents:
diff changeset
1137 // newInstance0.
a61af66fc99e Initial load
duke
parents:
diff changeset
1138 IfNode *toobig_iff = new (C, 2) IfNode(ctrl, initial_slow_test, PROB_MIN, COUNT_UNKNOWN);
a61af66fc99e Initial load
duke
parents:
diff changeset
1139 transform_later(toobig_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1140 // Plug the failing-too-big test into the slow-path region
a61af66fc99e Initial load
duke
parents:
diff changeset
1141 Node *toobig_true = new (C, 1) IfTrueNode( toobig_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1142 transform_later(toobig_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1143 slow_region ->init_req( too_big_or_final_path, toobig_true );
a61af66fc99e Initial load
duke
parents:
diff changeset
1144 toobig_false = new (C, 1) IfFalseNode( toobig_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1145 transform_later(toobig_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1146 } else { // No initial test, just fall into next case
a61af66fc99e Initial load
duke
parents:
diff changeset
1147 toobig_false = ctrl;
a61af66fc99e Initial load
duke
parents:
diff changeset
1148 debug_only(slow_region = NodeSentinel);
a61af66fc99e Initial load
duke
parents:
diff changeset
1149 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1150
a61af66fc99e Initial load
duke
parents:
diff changeset
1151 Node *slow_mem = mem; // save the current memory state for slow path
a61af66fc99e Initial load
duke
parents:
diff changeset
1152 // generate the fast allocation code unless we know that the initial test will always go slow
a61af66fc99e Initial load
duke
parents:
diff changeset
1153 if (!always_slow) {
565
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1154 // Fast path modifies only raw memory.
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1155 if (mem->is_MergeMem()) {
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1156 mem = mem->as_MergeMem()->memory_at(Compile::AliasIdxRaw);
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1157 }
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1158
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1159 Node* eden_top_adr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1160 Node* eden_end_adr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1161
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1162 set_eden_pointers(eden_top_adr, eden_end_adr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1163
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1164 // Load Eden::end. Loop invariant and hoisted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1165 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1166 // Note: We set the control input on "eden_end" and "old_eden_top" when using
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1167 // a TLAB to work around a bug where these values were being moved across
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1168 // a safepoint. These are not oops, so they cannot be include in the oop
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1169 // map, but they can be changed by a GC. The proper way to fix this would
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1170 // be to set the raw memory state when generating a SafepointNode. However
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1171 // this will require extensive changes to the loop optimization in order to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1172 // prevent a degradation of the optimization.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1173 // See comment in memnode.hpp, around line 227 in class LoadPNode.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1174 Node *eden_end = make_load(ctrl, mem, eden_end_adr, 0, TypeRawPtr::BOTTOM, T_ADDRESS);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1175
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1176 // allocate the Region and Phi nodes for the result
a61af66fc99e Initial load
duke
parents:
diff changeset
1177 result_region = new (C, 3) RegionNode(3);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1178 result_phi_rawmem = new (C, 3) PhiNode(result_region, Type::MEMORY, TypeRawPtr::BOTTOM);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1179 result_phi_rawoop = new (C, 3) PhiNode(result_region, TypeRawPtr::BOTTOM);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1180 result_phi_i_o = new (C, 3) PhiNode(result_region, Type::ABIO); // I/O is used for Prefetch
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1181
a61af66fc99e Initial load
duke
parents:
diff changeset
1182 // We need a Region for the loop-back contended case.
a61af66fc99e Initial load
duke
parents:
diff changeset
1183 enum { fall_in_path = 1, contended_loopback_path = 2 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1184 Node *contended_region;
a61af66fc99e Initial load
duke
parents:
diff changeset
1185 Node *contended_phi_rawmem;
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1186 if (UseTLAB) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1187 contended_region = toobig_false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1188 contended_phi_rawmem = mem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1189 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1190 contended_region = new (C, 3) RegionNode(3);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1191 contended_phi_rawmem = new (C, 3) PhiNode(contended_region, Type::MEMORY, TypeRawPtr::BOTTOM);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1192 // Now handle the passing-too-big test. We fall into the contended
a61af66fc99e Initial load
duke
parents:
diff changeset
1193 // loop-back merge point.
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1194 contended_region ->init_req(fall_in_path, toobig_false);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1195 contended_phi_rawmem->init_req(fall_in_path, mem);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1196 transform_later(contended_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1197 transform_later(contended_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1198 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1199
a61af66fc99e Initial load
duke
parents:
diff changeset
1200 // Load(-locked) the heap top.
a61af66fc99e Initial load
duke
parents:
diff changeset
1201 // See note above concerning the control input when using a TLAB
a61af66fc99e Initial load
duke
parents:
diff changeset
1202 Node *old_eden_top = UseTLAB
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1203 ? new (C, 3) LoadPNode (ctrl, contended_phi_rawmem, eden_top_adr, TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM)
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1204 : new (C, 3) LoadPLockedNode(contended_region, contended_phi_rawmem, eden_top_adr);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1205
a61af66fc99e Initial load
duke
parents:
diff changeset
1206 transform_later(old_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1207 // Add to heap top to get a new heap top
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1208 Node *new_eden_top = new (C, 4) AddPNode(top(), old_eden_top, size_in_bytes);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1209 transform_later(new_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1210 // Check for needing a GC; compare against heap end
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1211 Node *needgc_cmp = new (C, 3) CmpPNode(new_eden_top, eden_end);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1212 transform_later(needgc_cmp);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1213 Node *needgc_bol = new (C, 2) BoolNode(needgc_cmp, BoolTest::ge);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1214 transform_later(needgc_bol);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1215 IfNode *needgc_iff = new (C, 2) IfNode(contended_region, needgc_bol, PROB_UNLIKELY_MAG(4), COUNT_UNKNOWN);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1216 transform_later(needgc_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1217
a61af66fc99e Initial load
duke
parents:
diff changeset
1218 // Plug the failing-heap-space-need-gc test into the slow-path region
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1219 Node *needgc_true = new (C, 1) IfTrueNode(needgc_iff);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1220 transform_later(needgc_true);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1221 if (initial_slow_test) {
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1222 slow_region->init_req(need_gc_path, needgc_true);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1223 // This completes all paths into the slow merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1224 transform_later(slow_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1225 } else { // No initial slow path needed!
a61af66fc99e Initial load
duke
parents:
diff changeset
1226 // Just fall from the need-GC path straight into the VM call.
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1227 slow_region = needgc_true;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1228 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1229 // No need for a GC. Setup for the Store-Conditional
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1230 Node *needgc_false = new (C, 1) IfFalseNode(needgc_iff);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1231 transform_later(needgc_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1232
a61af66fc99e Initial load
duke
parents:
diff changeset
1233 // Grab regular I/O before optional prefetch may change it.
a61af66fc99e Initial load
duke
parents:
diff changeset
1234 // Slow-path does no I/O so just set it to the original I/O.
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1235 result_phi_i_o->init_req(slow_result_path, i_o);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1236
a61af66fc99e Initial load
duke
parents:
diff changeset
1237 i_o = prefetch_allocation(i_o, needgc_false, contended_phi_rawmem,
a61af66fc99e Initial load
duke
parents:
diff changeset
1238 old_eden_top, new_eden_top, length);
a61af66fc99e Initial load
duke
parents:
diff changeset
1239
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1240 // Name successful fast-path variables
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1241 Node* fast_oop = old_eden_top;
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1242 Node* fast_oop_ctrl;
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1243 Node* fast_oop_rawmem;
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1244
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1245 // Store (-conditional) the modified eden top back down.
a61af66fc99e Initial load
duke
parents:
diff changeset
1246 // StorePConditional produces flags for a test PLUS a modified raw
a61af66fc99e Initial load
duke
parents:
diff changeset
1247 // memory state.
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1248 if (UseTLAB) {
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1249 Node* store_eden_top =
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1250 new (C, 4) StorePNode(needgc_false, contended_phi_rawmem, eden_top_adr,
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1251 TypeRawPtr::BOTTOM, new_eden_top);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1252 transform_later(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1253 fast_oop_ctrl = needgc_false; // No contention, so this is the fast path
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1254 fast_oop_rawmem = store_eden_top;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1255 } else {
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1256 Node* store_eden_top =
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1257 new (C, 5) StorePConditionalNode(needgc_false, contended_phi_rawmem, eden_top_adr,
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1258 new_eden_top, fast_oop/*old_eden_top*/);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1259 transform_later(store_eden_top);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1260 Node *contention_check = new (C, 2) BoolNode(store_eden_top, BoolTest::ne);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1261 transform_later(contention_check);
a61af66fc99e Initial load
duke
parents:
diff changeset
1262 store_eden_top = new (C, 1) SCMemProjNode(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1263 transform_later(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1264
a61af66fc99e Initial load
duke
parents:
diff changeset
1265 // If not using TLABs, check to see if there was contention.
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1266 IfNode *contention_iff = new (C, 2) IfNode (needgc_false, contention_check, PROB_MIN, COUNT_UNKNOWN);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1267 transform_later(contention_iff);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1268 Node *contention_true = new (C, 1) IfTrueNode(contention_iff);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1269 transform_later(contention_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1270 // If contention, loopback and try again.
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1271 contended_region->init_req(contended_loopback_path, contention_true);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1272 contended_phi_rawmem->init_req(contended_loopback_path, store_eden_top);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1273
a61af66fc99e Initial load
duke
parents:
diff changeset
1274 // Fast-path succeeded with no contention!
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1275 Node *contention_false = new (C, 1) IfFalseNode(contention_iff);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1276 transform_later(contention_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1277 fast_oop_ctrl = contention_false;
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1278
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1279 // Bump total allocated bytes for this thread
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1280 Node* thread = new (C, 1) ThreadLocalNode();
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1281 transform_later(thread);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1282 Node* alloc_bytes_adr = basic_plus_adr(top()/*not oop*/, thread,
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1283 in_bytes(JavaThread::allocated_bytes_offset()));
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1284 Node* alloc_bytes = make_load(fast_oop_ctrl, store_eden_top, alloc_bytes_adr,
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1285 0, TypeLong::LONG, T_LONG);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1286 #ifdef _LP64
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1287 Node* alloc_size = size_in_bytes;
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1288 #else
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1289 Node* alloc_size = new (C, 2) ConvI2LNode(size_in_bytes);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1290 transform_later(alloc_size);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1291 #endif
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1292 Node* new_alloc_bytes = new (C, 3) AddLNode(alloc_bytes, alloc_size);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1293 transform_later(new_alloc_bytes);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1294 fast_oop_rawmem = make_store(fast_oop_ctrl, store_eden_top, alloc_bytes_adr,
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1295 0, new_alloc_bytes, T_LONG);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1296 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1297
4763
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1298 InitializeNode* init = alloc->initialization();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1299 fast_oop_rawmem = initialize_object(alloc,
a61af66fc99e Initial load
duke
parents:
diff changeset
1300 fast_oop_ctrl, fast_oop_rawmem, fast_oop,
a61af66fc99e Initial load
duke
parents:
diff changeset
1301 klass_node, length, size_in_bytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
1302
4763
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1303 // If initialization is performed by an array copy, any required
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1304 // MemBarStoreStore was already added. If the object does not
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1305 // escape no need for a MemBarStoreStore. Otherwise we need a
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1306 // MemBarStoreStore so that stores that initialize this object
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1307 // can't be reordered with a subsequent store that makes this
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1308 // object accessible by other threads.
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1309 if (init == NULL || (!init->is_complete_with_arraycopy() && !init->does_not_escape())) {
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1310 if (init == NULL || init->req() < InitializeNode::RawStores) {
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1311 // No InitializeNode or no stores captured by zeroing
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1312 // elimination. Simply add the MemBarStoreStore after object
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1313 // initialization.
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1314 MemBarNode* mb = MemBarNode::make(C, Op_MemBarStoreStore, Compile::AliasIdxBot, fast_oop_rawmem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1315 transform_later(mb);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1316
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1317 mb->init_req(TypeFunc::Memory, fast_oop_rawmem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1318 mb->init_req(TypeFunc::Control, fast_oop_ctrl);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1319 fast_oop_ctrl = new (C, 1) ProjNode(mb,TypeFunc::Control);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1320 transform_later(fast_oop_ctrl);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1321 fast_oop_rawmem = new (C, 1) ProjNode(mb,TypeFunc::Memory);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1322 transform_later(fast_oop_rawmem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1323 } else {
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1324 // Add the MemBarStoreStore after the InitializeNode so that
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1325 // all stores performing the initialization that were moved
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1326 // before the InitializeNode happen before the storestore
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1327 // barrier.
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1328
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1329 Node* init_ctrl = init->proj_out(TypeFunc::Control);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1330 Node* init_mem = init->proj_out(TypeFunc::Memory);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1331
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1332 MemBarNode* mb = MemBarNode::make(C, Op_MemBarStoreStore, Compile::AliasIdxBot);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1333 transform_later(mb);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1334
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1335 Node* ctrl = new (C, 1) ProjNode(init,TypeFunc::Control);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1336 transform_later(ctrl);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1337 Node* mem = new (C, 1) ProjNode(init,TypeFunc::Memory);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1338 transform_later(mem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1339
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1340 // The MemBarStoreStore depends on control and memory coming
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1341 // from the InitializeNode
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1342 mb->init_req(TypeFunc::Memory, mem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1343 mb->init_req(TypeFunc::Control, ctrl);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1344
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1345 ctrl = new (C, 1) ProjNode(mb,TypeFunc::Control);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1346 transform_later(ctrl);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1347 mem = new (C, 1) ProjNode(mb,TypeFunc::Memory);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1348 transform_later(mem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1349
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1350 // All nodes that depended on the InitializeNode for control
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1351 // and memory must now depend on the MemBarNode that itself
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1352 // depends on the InitializeNode
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1353 _igvn.replace_node(init_ctrl, ctrl);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1354 _igvn.replace_node(init_mem, mem);
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1355 }
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1356 }
1dc233a8c7fe 7121140: Allocation paths require explicit memory synchronization operations for RMO systems
roland
parents: 4762
diff changeset
1357
780
c96bf21b756f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 708
diff changeset
1358 if (C->env()->dtrace_extended_probes()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1359 // Slow-path call
a61af66fc99e Initial load
duke
parents:
diff changeset
1360 int size = TypeFunc::Parms + 2;
a61af66fc99e Initial load
duke
parents:
diff changeset
1361 CallLeafNode *call = new (C, size) CallLeafNode(OptoRuntime::dtrace_object_alloc_Type(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1362 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc_base),
a61af66fc99e Initial load
duke
parents:
diff changeset
1363 "dtrace_object_alloc",
a61af66fc99e Initial load
duke
parents:
diff changeset
1364 TypeRawPtr::BOTTOM);
a61af66fc99e Initial load
duke
parents:
diff changeset
1365
a61af66fc99e Initial load
duke
parents:
diff changeset
1366 // Get base of thread-local storage area
a61af66fc99e Initial load
duke
parents:
diff changeset
1367 Node* thread = new (C, 1) ThreadLocalNode();
a61af66fc99e Initial load
duke
parents:
diff changeset
1368 transform_later(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1369
a61af66fc99e Initial load
duke
parents:
diff changeset
1370 call->init_req(TypeFunc::Parms+0, thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1371 call->init_req(TypeFunc::Parms+1, fast_oop);
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1372 call->init_req(TypeFunc::Control, fast_oop_ctrl);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1373 call->init_req(TypeFunc::I_O , top()); // does no i/o
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1374 call->init_req(TypeFunc::Memory , fast_oop_rawmem);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1375 call->init_req(TypeFunc::ReturnAdr, alloc->in(TypeFunc::ReturnAdr));
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1376 call->init_req(TypeFunc::FramePtr, alloc->in(TypeFunc::FramePtr));
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1377 transform_later(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1378 fast_oop_ctrl = new (C, 1) ProjNode(call,TypeFunc::Control);
a61af66fc99e Initial load
duke
parents:
diff changeset
1379 transform_later(fast_oop_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
1380 fast_oop_rawmem = new (C, 1) ProjNode(call,TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1381 transform_later(fast_oop_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1382 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1383
a61af66fc99e Initial load
duke
parents:
diff changeset
1384 // Plug in the successful fast-path into the result merge point
2100
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1385 result_region ->init_req(fast_result_path, fast_oop_ctrl);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1386 result_phi_rawoop->init_req(fast_result_path, fast_oop);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1387 result_phi_i_o ->init_req(fast_result_path, i_o);
b1a2afa37ec4 7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents: 1972
diff changeset
1388 result_phi_rawmem->init_req(fast_result_path, fast_oop_rawmem);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1389 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1390 slow_region = ctrl;
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1391 result_phi_i_o = i_o; // Rename it to use in the following code.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1392 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1393
a61af66fc99e Initial load
duke
parents:
diff changeset
1394 // Generate slow-path call
a61af66fc99e Initial load
duke
parents:
diff changeset
1395 CallNode *call = new (C, slow_call_type->domain()->cnt())
a61af66fc99e Initial load
duke
parents:
diff changeset
1396 CallStaticJavaNode(slow_call_type, slow_call_address,
a61af66fc99e Initial load
duke
parents:
diff changeset
1397 OptoRuntime::stub_name(slow_call_address),
a61af66fc99e Initial load
duke
parents:
diff changeset
1398 alloc->jvms()->bci(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1399 TypePtr::BOTTOM);
a61af66fc99e Initial load
duke
parents:
diff changeset
1400 call->init_req( TypeFunc::Control, slow_region );
a61af66fc99e Initial load
duke
parents:
diff changeset
1401 call->init_req( TypeFunc::I_O , top() ) ; // does no i/o
a61af66fc99e Initial load
duke
parents:
diff changeset
1402 call->init_req( TypeFunc::Memory , slow_mem ); // may gc ptrs
a61af66fc99e Initial load
duke
parents:
diff changeset
1403 call->init_req( TypeFunc::ReturnAdr, alloc->in(TypeFunc::ReturnAdr) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1404 call->init_req( TypeFunc::FramePtr, alloc->in(TypeFunc::FramePtr) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1405
a61af66fc99e Initial load
duke
parents:
diff changeset
1406 call->init_req(TypeFunc::Parms+0, klass_node);
a61af66fc99e Initial load
duke
parents:
diff changeset
1407 if (length != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1408 call->init_req(TypeFunc::Parms+1, length);
a61af66fc99e Initial load
duke
parents:
diff changeset
1409 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1410
a61af66fc99e Initial load
duke
parents:
diff changeset
1411 // Copy debug information and adjust JVMState information, then replace
a61af66fc99e Initial load
duke
parents:
diff changeset
1412 // allocate node with the call
a61af66fc99e Initial load
duke
parents:
diff changeset
1413 copy_call_debug_info((CallNode *) alloc, call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1414 if (!always_slow) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1415 call->set_cnt(PROB_UNLIKELY_MAG(4)); // Same effect as RC_UNCOMMON.
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1416 } else {
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1417 // Hook i_o projection to avoid its elimination during allocation
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1418 // replacement (when only a slow call is generated).
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1419 call->set_req(TypeFunc::I_O, result_phi_i_o);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1420 }
1621
6027dddc26c6 6677629: PhaseIterGVN::subsume_node() should call hash_delete() and add_users_to_worklist()
kvn
parents: 1609
diff changeset
1421 _igvn.replace_node(alloc, call);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1422 transform_later(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1423
a61af66fc99e Initial load
duke
parents:
diff changeset
1424 // Identify the output projections from the allocate node and
a61af66fc99e Initial load
duke
parents:
diff changeset
1425 // adjust any references to them.
a61af66fc99e Initial load
duke
parents:
diff changeset
1426 // The control and io projections look like:
a61af66fc99e Initial load
duke
parents:
diff changeset
1427 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1428 // v---Proj(ctrl) <-----+ v---CatchProj(ctrl)
a61af66fc99e Initial load
duke
parents:
diff changeset
1429 // Allocate Catch
a61af66fc99e Initial load
duke
parents:
diff changeset
1430 // ^---Proj(io) <-------+ ^---CatchProj(io)
a61af66fc99e Initial load
duke
parents:
diff changeset
1431 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1432 // We are interested in the CatchProj nodes.
a61af66fc99e Initial load
duke
parents:
diff changeset
1433 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1434 extract_call_projections(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1435
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1436 // An allocate node has separate memory projections for the uses on
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1437 // the control and i_o paths. Replace the control memory projection with
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1438 // result_phi_rawmem (unless we are only generating a slow call when
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1439 // both memory projections are combined)
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1440 if (!always_slow && _memproj_fallthrough != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1441 for (DUIterator_Fast imax, i = _memproj_fallthrough->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1442 Node *use = _memproj_fallthrough->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1443 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1444 imax -= replace_input(use, _memproj_fallthrough, result_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1445 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1446 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1447 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1448 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1449 }
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1450 // Now change uses of _memproj_catchall to use _memproj_fallthrough and delete
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1451 // _memproj_catchall so we end up with a call that has only 1 memory projection.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1452 if (_memproj_catchall != NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1453 if (_memproj_fallthrough == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1454 _memproj_fallthrough = new (C, 1) ProjNode(call, TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1455 transform_later(_memproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1456 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1457 for (DUIterator_Fast imax, i = _memproj_catchall->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1458 Node *use = _memproj_catchall->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1459 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1460 imax -= replace_input(use, _memproj_catchall, _memproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1461 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1462 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1463 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1464 }
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1465 assert(_memproj_catchall->outcnt() == 0, "all uses must be deleted");
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1466 _igvn.remove_dead_node(_memproj_catchall);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1467 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1468
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1469 // An allocate node has separate i_o projections for the uses on the control
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1470 // and i_o paths. Always replace the control i_o projection with result i_o
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1471 // otherwise incoming i_o become dead when only a slow call is generated
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1472 // (it is different from memory projections where both projections are
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1473 // combined in such case).
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1474 if (_ioproj_fallthrough != NULL) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1475 for (DUIterator_Fast imax, i = _ioproj_fallthrough->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1476 Node *use = _ioproj_fallthrough->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1477 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1478 imax -= replace_input(use, _ioproj_fallthrough, result_phi_i_o);
a61af66fc99e Initial load
duke
parents:
diff changeset
1479 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1480 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1481 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1482 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1483 }
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1484 // Now change uses of _ioproj_catchall to use _ioproj_fallthrough and delete
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1485 // _ioproj_catchall so we end up with a call that has only 1 i_o projection.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1486 if (_ioproj_catchall != NULL ) {
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1487 if (_ioproj_fallthrough == NULL) {
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1488 _ioproj_fallthrough = new (C, 1) ProjNode(call, TypeFunc::I_O);
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1489 transform_later(_ioproj_fallthrough);
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1490 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1491 for (DUIterator_Fast imax, i = _ioproj_catchall->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1492 Node *use = _ioproj_catchall->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1493 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1494 imax -= replace_input(use, _ioproj_catchall, _ioproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1495 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1496 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1497 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1498 }
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1499 assert(_ioproj_catchall->outcnt() == 0, "all uses must be deleted");
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1500 _igvn.remove_dead_node(_ioproj_catchall);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1501 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1502
a61af66fc99e Initial load
duke
parents:
diff changeset
1503 // if we generated only a slow call, we are done
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1504 if (always_slow) {
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1505 // Now we can unhook i_o.
4769
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1506 if (result_phi_i_o->outcnt() > 1) {
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1507 call->set_req(TypeFunc::I_O, top());
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1508 } else {
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1509 assert(result_phi_i_o->unique_ctrl_out() == call, "");
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1510 // Case of new array with negative size known during compilation.
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1511 // AllocateArrayNode::Ideal() optimization disconnect unreachable
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1512 // following code since call to runtime will throw exception.
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1513 // As result there will be no users of i_o after the call.
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1514 // Leave i_o attached to this call to avoid problems in preceding graph.
9c87bcb3b4dd 7125879: assert(proj != NULL) failed: must be found
kvn
parents: 4767
diff changeset
1515 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1516 return;
4767
d12a66fa3820 7123954: Some CTW test crash with SIGSEGV
kvn
parents: 4763
diff changeset
1517 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1518
a61af66fc99e Initial load
duke
parents:
diff changeset
1519
a61af66fc99e Initial load
duke
parents:
diff changeset
1520 if (_fallthroughcatchproj != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1521 ctrl = _fallthroughcatchproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
1522 transform_later(ctrl);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
1523 _igvn.replace_node(_fallthroughcatchproj, result_region);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1524 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1525 ctrl = top();
a61af66fc99e Initial load
duke
parents:
diff changeset
1526 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1527 Node *slow_result;
a61af66fc99e Initial load
duke
parents:
diff changeset
1528 if (_resproj == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1529 // no uses of the allocation result
a61af66fc99e Initial load
duke
parents:
diff changeset
1530 slow_result = top();
a61af66fc99e Initial load
duke
parents:
diff changeset
1531 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1532 slow_result = _resproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
1533 transform_later(slow_result);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
1534 _igvn.replace_node(_resproj, result_phi_rawoop);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1535 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1536
a61af66fc99e Initial load
duke
parents:
diff changeset
1537 // Plug slow-path into result merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1538 result_region ->init_req( slow_result_path, ctrl );
a61af66fc99e Initial load
duke
parents:
diff changeset
1539 result_phi_rawoop->init_req( slow_result_path, slow_result);
a61af66fc99e Initial load
duke
parents:
diff changeset
1540 result_phi_rawmem->init_req( slow_result_path, _memproj_fallthrough );
a61af66fc99e Initial load
duke
parents:
diff changeset
1541 transform_later(result_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1542 transform_later(result_phi_rawoop);
a61af66fc99e Initial load
duke
parents:
diff changeset
1543 transform_later(result_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1544 transform_later(result_phi_i_o);
a61af66fc99e Initial load
duke
parents:
diff changeset
1545 // This completes all paths into the result merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1546 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1547
a61af66fc99e Initial load
duke
parents:
diff changeset
1548
a61af66fc99e Initial load
duke
parents:
diff changeset
1549 // Helper for PhaseMacroExpand::expand_allocate_common.
a61af66fc99e Initial load
duke
parents:
diff changeset
1550 // Initializes the newly-allocated storage.
a61af66fc99e Initial load
duke
parents:
diff changeset
1551 Node*
a61af66fc99e Initial load
duke
parents:
diff changeset
1552 PhaseMacroExpand::initialize_object(AllocateNode* alloc,
a61af66fc99e Initial load
duke
parents:
diff changeset
1553 Node* control, Node* rawmem, Node* object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1554 Node* klass_node, Node* length,
a61af66fc99e Initial load
duke
parents:
diff changeset
1555 Node* size_in_bytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1556 InitializeNode* init = alloc->initialization();
a61af66fc99e Initial load
duke
parents:
diff changeset
1557 // Store the klass & mark bits
a61af66fc99e Initial load
duke
parents:
diff changeset
1558 Node* mark_node = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1559 // For now only enable fast locking for non-array types
a61af66fc99e Initial load
duke
parents:
diff changeset
1560 if (UseBiasedLocking && (length == NULL)) {
4762
069ab3f976d3 7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents: 4115
diff changeset
1561 mark_node = make_load(control, rawmem, klass_node, in_bytes(Klass::prototype_header_offset()), TypeRawPtr::BOTTOM, T_ADDRESS);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1562 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1563 mark_node = makecon(TypeRawPtr::make((address)markOopDesc::prototype()));
a61af66fc99e Initial load
duke
parents:
diff changeset
1564 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1565 rawmem = make_store(control, rawmem, object, oopDesc::mark_offset_in_bytes(), mark_node, T_ADDRESS);
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
1566
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1567 rawmem = make_store(control, rawmem, object, oopDesc::klass_offset_in_bytes(), klass_node, T_OBJECT);
a61af66fc99e Initial load
duke
parents:
diff changeset
1568 int header_size = alloc->minimum_header_size(); // conservatively small
a61af66fc99e Initial load
duke
parents:
diff changeset
1569
a61af66fc99e Initial load
duke
parents:
diff changeset
1570 // Array length
a61af66fc99e Initial load
duke
parents:
diff changeset
1571 if (length != NULL) { // Arrays need length field
a61af66fc99e Initial load
duke
parents:
diff changeset
1572 rawmem = make_store(control, rawmem, object, arrayOopDesc::length_offset_in_bytes(), length, T_INT);
a61af66fc99e Initial load
duke
parents:
diff changeset
1573 // conservatively small header size:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
1574 header_size = arrayOopDesc::base_offset_in_bytes(T_BYTE);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1575 ciKlass* k = _igvn.type(klass_node)->is_klassptr()->klass();
a61af66fc99e Initial load
duke
parents:
diff changeset
1576 if (k->is_array_klass()) // we know the exact header size in most cases:
a61af66fc99e Initial load
duke
parents:
diff changeset
1577 header_size = Klass::layout_helper_header_size(k->layout_helper());
a61af66fc99e Initial load
duke
parents:
diff changeset
1578 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1579
a61af66fc99e Initial load
duke
parents:
diff changeset
1580 // Clear the object body, if necessary.
a61af66fc99e Initial load
duke
parents:
diff changeset
1581 if (init == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1582 // The init has somehow disappeared; be cautious and clear everything.
a61af66fc99e Initial load
duke
parents:
diff changeset
1583 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1584 // This can happen if a node is allocated but an uncommon trap occurs
a61af66fc99e Initial load
duke
parents:
diff changeset
1585 // immediately. In this case, the Initialize gets associated with the
a61af66fc99e Initial load
duke
parents:
diff changeset
1586 // trap, and may be placed in a different (outer) loop, if the Allocate
a61af66fc99e Initial load
duke
parents:
diff changeset
1587 // is in a loop. If (this is rare) the inner loop gets unrolled, then
a61af66fc99e Initial load
duke
parents:
diff changeset
1588 // there can be two Allocates to one Initialize. The answer in all these
a61af66fc99e Initial load
duke
parents:
diff changeset
1589 // edge cases is safety first. It is always safe to clear immediately
a61af66fc99e Initial load
duke
parents:
diff changeset
1590 // within an Allocate, and then (maybe or maybe not) clear some more later.
a61af66fc99e Initial load
duke
parents:
diff changeset
1591 if (!ZeroTLAB)
a61af66fc99e Initial load
duke
parents:
diff changeset
1592 rawmem = ClearArrayNode::clear_memory(control, rawmem, object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1593 header_size, size_in_bytes,
a61af66fc99e Initial load
duke
parents:
diff changeset
1594 &_igvn);
a61af66fc99e Initial load
duke
parents:
diff changeset
1595 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1596 if (!init->is_complete()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1597 // Try to win by zeroing only what the init does not store.
a61af66fc99e Initial load
duke
parents:
diff changeset
1598 // We can also try to do some peephole optimizations,
a61af66fc99e Initial load
duke
parents:
diff changeset
1599 // such as combining some adjacent subword stores.
a61af66fc99e Initial load
duke
parents:
diff changeset
1600 rawmem = init->complete_stores(control, rawmem, object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1601 header_size, size_in_bytes, &_igvn);
a61af66fc99e Initial load
duke
parents:
diff changeset
1602 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1603 // We have no more use for this link, since the AllocateNode goes away:
a61af66fc99e Initial load
duke
parents:
diff changeset
1604 init->set_req(InitializeNode::RawAddress, top());
a61af66fc99e Initial load
duke
parents:
diff changeset
1605 // (If we keep the link, it just confuses the register allocator,
a61af66fc99e Initial load
duke
parents:
diff changeset
1606 // who thinks he sees a real use of the address by the membar.)
a61af66fc99e Initial load
duke
parents:
diff changeset
1607 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1608
a61af66fc99e Initial load
duke
parents:
diff changeset
1609 return rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1610 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1611
a61af66fc99e Initial load
duke
parents:
diff changeset
1612 // Generate prefetch instructions for next allocations.
a61af66fc99e Initial load
duke
parents:
diff changeset
1613 Node* PhaseMacroExpand::prefetch_allocation(Node* i_o, Node*& needgc_false,
a61af66fc99e Initial load
duke
parents:
diff changeset
1614 Node*& contended_phi_rawmem,
a61af66fc99e Initial load
duke
parents:
diff changeset
1615 Node* old_eden_top, Node* new_eden_top,
a61af66fc99e Initial load
duke
parents:
diff changeset
1616 Node* length) {
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1617 enum { fall_in_path = 1, pf_path = 2 };
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1618 if( UseTLAB && AllocatePrefetchStyle == 2 ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1619 // Generate prefetch allocation with watermark check.
a61af66fc99e Initial load
duke
parents:
diff changeset
1620 // As an allocation hits the watermark, we will prefetch starting
a61af66fc99e Initial load
duke
parents:
diff changeset
1621 // at a "distance" away from watermark.
a61af66fc99e Initial load
duke
parents:
diff changeset
1622
a61af66fc99e Initial load
duke
parents:
diff changeset
1623 Node *pf_region = new (C, 3) RegionNode(3);
a61af66fc99e Initial load
duke
parents:
diff changeset
1624 Node *pf_phi_rawmem = new (C, 3) PhiNode( pf_region, Type::MEMORY,
a61af66fc99e Initial load
duke
parents:
diff changeset
1625 TypeRawPtr::BOTTOM );
a61af66fc99e Initial load
duke
parents:
diff changeset
1626 // I/O is used for Prefetch
a61af66fc99e Initial load
duke
parents:
diff changeset
1627 Node *pf_phi_abio = new (C, 3) PhiNode( pf_region, Type::ABIO );
a61af66fc99e Initial load
duke
parents:
diff changeset
1628
a61af66fc99e Initial load
duke
parents:
diff changeset
1629 Node *thread = new (C, 1) ThreadLocalNode();
a61af66fc99e Initial load
duke
parents:
diff changeset
1630 transform_later(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1631
a61af66fc99e Initial load
duke
parents:
diff changeset
1632 Node *eden_pf_adr = new (C, 4) AddPNode( top()/*not oop*/, thread,
a61af66fc99e Initial load
duke
parents:
diff changeset
1633 _igvn.MakeConX(in_bytes(JavaThread::tlab_pf_top_offset())) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1634 transform_later(eden_pf_adr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1635
a61af66fc99e Initial load
duke
parents:
diff changeset
1636 Node *old_pf_wm = new (C, 3) LoadPNode( needgc_false,
a61af66fc99e Initial load
duke
parents:
diff changeset
1637 contended_phi_rawmem, eden_pf_adr,
a61af66fc99e Initial load
duke
parents:
diff changeset
1638 TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM );
a61af66fc99e Initial load
duke
parents:
diff changeset
1639 transform_later(old_pf_wm);
a61af66fc99e Initial load
duke
parents:
diff changeset
1640
a61af66fc99e Initial load
duke
parents:
diff changeset
1641 // check against new_eden_top
a61af66fc99e Initial load
duke
parents:
diff changeset
1642 Node *need_pf_cmp = new (C, 3) CmpPNode( new_eden_top, old_pf_wm );
a61af66fc99e Initial load
duke
parents:
diff changeset
1643 transform_later(need_pf_cmp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1644 Node *need_pf_bol = new (C, 2) BoolNode( need_pf_cmp, BoolTest::ge );
a61af66fc99e Initial load
duke
parents:
diff changeset
1645 transform_later(need_pf_bol);
a61af66fc99e Initial load
duke
parents:
diff changeset
1646 IfNode *need_pf_iff = new (C, 2) IfNode( needgc_false, need_pf_bol,
a61af66fc99e Initial load
duke
parents:
diff changeset
1647 PROB_UNLIKELY_MAG(4), COUNT_UNKNOWN );
a61af66fc99e Initial load
duke
parents:
diff changeset
1648 transform_later(need_pf_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1649
a61af66fc99e Initial load
duke
parents:
diff changeset
1650 // true node, add prefetchdistance
a61af66fc99e Initial load
duke
parents:
diff changeset
1651 Node *need_pf_true = new (C, 1) IfTrueNode( need_pf_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1652 transform_later(need_pf_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1653
a61af66fc99e Initial load
duke
parents:
diff changeset
1654 Node *need_pf_false = new (C, 1) IfFalseNode( need_pf_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1655 transform_later(need_pf_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1656
a61af66fc99e Initial load
duke
parents:
diff changeset
1657 Node *new_pf_wmt = new (C, 4) AddPNode( top(), old_pf_wm,
a61af66fc99e Initial load
duke
parents:
diff changeset
1658 _igvn.MakeConX(AllocatePrefetchDistance) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1659 transform_later(new_pf_wmt );
a61af66fc99e Initial load
duke
parents:
diff changeset
1660 new_pf_wmt->set_req(0, need_pf_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1661
a61af66fc99e Initial load
duke
parents:
diff changeset
1662 Node *store_new_wmt = new (C, 4) StorePNode( need_pf_true,
a61af66fc99e Initial load
duke
parents:
diff changeset
1663 contended_phi_rawmem, eden_pf_adr,
a61af66fc99e Initial load
duke
parents:
diff changeset
1664 TypeRawPtr::BOTTOM, new_pf_wmt );
a61af66fc99e Initial load
duke
parents:
diff changeset
1665 transform_later(store_new_wmt);
a61af66fc99e Initial load
duke
parents:
diff changeset
1666
a61af66fc99e Initial load
duke
parents:
diff changeset
1667 // adding prefetches
a61af66fc99e Initial load
duke
parents:
diff changeset
1668 pf_phi_abio->init_req( fall_in_path, i_o );
a61af66fc99e Initial load
duke
parents:
diff changeset
1669
a61af66fc99e Initial load
duke
parents:
diff changeset
1670 Node *prefetch_adr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1671 Node *prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1672 uint lines = AllocatePrefetchDistance / AllocatePrefetchStepSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
1673 uint step_size = AllocatePrefetchStepSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
1674 uint distance = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1675
a61af66fc99e Initial load
duke
parents:
diff changeset
1676 for ( uint i = 0; i < lines; i++ ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1677 prefetch_adr = new (C, 4) AddPNode( old_pf_wm, new_pf_wmt,
a61af66fc99e Initial load
duke
parents:
diff changeset
1678 _igvn.MakeConX(distance) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1679 transform_later(prefetch_adr);
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1680 prefetch = new (C, 3) PrefetchAllocationNode( i_o, prefetch_adr );
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1681 transform_later(prefetch);
a61af66fc99e Initial load
duke
parents:
diff changeset
1682 distance += step_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1683 i_o = prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1684 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1685 pf_phi_abio->set_req( pf_path, i_o );
a61af66fc99e Initial load
duke
parents:
diff changeset
1686
a61af66fc99e Initial load
duke
parents:
diff changeset
1687 pf_region->init_req( fall_in_path, need_pf_false );
a61af66fc99e Initial load
duke
parents:
diff changeset
1688 pf_region->init_req( pf_path, need_pf_true );
a61af66fc99e Initial load
duke
parents:
diff changeset
1689
a61af66fc99e Initial load
duke
parents:
diff changeset
1690 pf_phi_rawmem->init_req( fall_in_path, contended_phi_rawmem );
a61af66fc99e Initial load
duke
parents:
diff changeset
1691 pf_phi_rawmem->init_req( pf_path, store_new_wmt );
a61af66fc99e Initial load
duke
parents:
diff changeset
1692
a61af66fc99e Initial load
duke
parents:
diff changeset
1693 transform_later(pf_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1694 transform_later(pf_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1695 transform_later(pf_phi_abio);
a61af66fc99e Initial load
duke
parents:
diff changeset
1696
a61af66fc99e Initial load
duke
parents:
diff changeset
1697 needgc_false = pf_region;
a61af66fc99e Initial load
duke
parents:
diff changeset
1698 contended_phi_rawmem = pf_phi_rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1699 i_o = pf_phi_abio;
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1700 } else if( UseTLAB && AllocatePrefetchStyle == 3 ) {
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1701 // Insert a prefetch for each allocation.
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1702 // This code is used for Sparc with BIS.
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1703 Node *pf_region = new (C, 3) RegionNode(3);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1704 Node *pf_phi_rawmem = new (C, 3) PhiNode( pf_region, Type::MEMORY,
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1705 TypeRawPtr::BOTTOM );
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1706
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1707 // Generate several prefetch instructions.
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1708 uint lines = (length != NULL) ? AllocatePrefetchLines : AllocateInstancePrefetchLines;
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1709 uint step_size = AllocatePrefetchStepSize;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1710 uint distance = AllocatePrefetchDistance;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1711
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1712 // Next cache address.
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1713 Node *cache_adr = new (C, 4) AddPNode(old_eden_top, old_eden_top,
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1714 _igvn.MakeConX(distance));
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1715 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1716 cache_adr = new (C, 2) CastP2XNode(needgc_false, cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1717 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1718 Node* mask = _igvn.MakeConX(~(intptr_t)(step_size-1));
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1719 cache_adr = new (C, 3) AndXNode(cache_adr, mask);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1720 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1721 cache_adr = new (C, 2) CastX2PNode(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1722 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1723
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1724 // Prefetch
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1725 Node *prefetch = new (C, 3) PrefetchAllocationNode( contended_phi_rawmem, cache_adr );
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1726 prefetch->set_req(0, needgc_false);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1727 transform_later(prefetch);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1728 contended_phi_rawmem = prefetch;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1729 Node *prefetch_adr;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1730 distance = step_size;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1731 for ( uint i = 1; i < lines; i++ ) {
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1732 prefetch_adr = new (C, 4) AddPNode( cache_adr, cache_adr,
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1733 _igvn.MakeConX(distance) );
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1734 transform_later(prefetch_adr);
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1735 prefetch = new (C, 3) PrefetchAllocationNode( contended_phi_rawmem, prefetch_adr );
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1736 transform_later(prefetch);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1737 distance += step_size;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1738 contended_phi_rawmem = prefetch;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1739 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1740 } else if( AllocatePrefetchStyle > 0 ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1741 // Insert a prefetch for each allocation only on the fast-path
a61af66fc99e Initial load
duke
parents:
diff changeset
1742 Node *prefetch_adr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1743 Node *prefetch;
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1744 // Generate several prefetch instructions.
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1745 uint lines = (length != NULL) ? AllocatePrefetchLines : AllocateInstancePrefetchLines;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1746 uint step_size = AllocatePrefetchStepSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
1747 uint distance = AllocatePrefetchDistance;
a61af66fc99e Initial load
duke
parents:
diff changeset
1748 for ( uint i = 0; i < lines; i++ ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1749 prefetch_adr = new (C, 4) AddPNode( old_eden_top, new_eden_top,
a61af66fc99e Initial load
duke
parents:
diff changeset
1750 _igvn.MakeConX(distance) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1751 transform_later(prefetch_adr);
3854
1af104d6cf99 7079329: Adjust allocation prefetching for T4
kvn
parents: 3849
diff changeset
1752 prefetch = new (C, 3) PrefetchAllocationNode( i_o, prefetch_adr );
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1753 // Do not let it float too high, since if eden_top == eden_end,
a61af66fc99e Initial load
duke
parents:
diff changeset
1754 // both might be null.
a61af66fc99e Initial load
duke
parents:
diff changeset
1755 if( i == 0 ) { // Set control for first prefetch, next follows it
a61af66fc99e Initial load
duke
parents:
diff changeset
1756 prefetch->init_req(0, needgc_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1757 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1758 transform_later(prefetch);
a61af66fc99e Initial load
duke
parents:
diff changeset
1759 distance += step_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1760 i_o = prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1761 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1762 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1763 return i_o;
a61af66fc99e Initial load
duke
parents:
diff changeset
1764 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1765
a61af66fc99e Initial load
duke
parents:
diff changeset
1766
a61af66fc99e Initial load
duke
parents:
diff changeset
1767 void PhaseMacroExpand::expand_allocate(AllocateNode *alloc) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1768 expand_allocate_common(alloc, NULL,
a61af66fc99e Initial load
duke
parents:
diff changeset
1769 OptoRuntime::new_instance_Type(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1770 OptoRuntime::new_instance_Java());
a61af66fc99e Initial load
duke
parents:
diff changeset
1771 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1772
a61af66fc99e Initial load
duke
parents:
diff changeset
1773 void PhaseMacroExpand::expand_allocate_array(AllocateArrayNode *alloc) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1774 Node* length = alloc->in(AllocateNode::ALength);
3961
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1775 InitializeNode* init = alloc->initialization();
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1776 Node* klass_node = alloc->in(AllocateNode::KlassNode);
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1777 ciKlass* k = _igvn.type(klass_node)->is_klassptr()->klass();
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1778 address slow_call_address; // Address of slow call
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1779 if (init != NULL && init->is_complete_with_arraycopy() &&
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1780 k->is_type_array_klass()) {
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1781 // Don't zero type array during slow allocation in VM since
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1782 // it will be initialized later by arraycopy in compiled code.
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1783 slow_call_address = OptoRuntime::new_array_nozero_Java();
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1784 } else {
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1785 slow_call_address = OptoRuntime::new_array_Java();
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1786 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1787 expand_allocate_common(alloc, length,
a61af66fc99e Initial load
duke
parents:
diff changeset
1788 OptoRuntime::new_array_Type(),
3961
a92cdbac8b9e 7081933: Use zeroing elimination optimization for large array
kvn
parents: 3854
diff changeset
1789 slow_call_address);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1790 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1791
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1792 //-------------------mark_eliminated_box----------------------------------
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1793 //
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1794 // During EA obj may point to several objects but after few ideal graph
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1795 // transformations (CCP) it may point to only one non escaping object
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1796 // (but still using phi), corresponding locks and unlocks will be marked
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1797 // for elimination. Later obj could be replaced with a new node (new phi)
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1798 // and which does not have escape information. And later after some graph
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1799 // reshape other locks and unlocks (which were not marked for elimination
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1800 // before) are connected to this new obj (phi) but they still will not be
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1801 // marked for elimination since new obj has no escape information.
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1802 // Mark all associated (same box and obj) lock and unlock nodes for
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1803 // elimination if some of them marked already.
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1804 void PhaseMacroExpand::mark_eliminated_box(Node* oldbox, Node* obj) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1805 if (oldbox->is_BoxLock() && oldbox->as_BoxLock()->is_eliminated())
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1806 return;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1807
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1808 if (oldbox->is_BoxLock() &&
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1809 oldbox->as_BoxLock()->is_simple_lock_region(NULL, obj)) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1810 // Box is used only in one lock region. Mark this box as eliminated.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1811 _igvn.hash_delete(oldbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1812 oldbox->as_BoxLock()->set_eliminated(); // This changes box's hash value
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1813 _igvn.hash_insert(oldbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1814
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1815 for (uint i = 0; i < oldbox->outcnt(); i++) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1816 Node* u = oldbox->raw_out(i);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1817 if (u->is_AbstractLock() && !u->as_AbstractLock()->is_non_esc_obj()) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1818 AbstractLockNode* alock = u->as_AbstractLock();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1819 // Check lock's box since box could be referenced by Lock's debug info.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1820 if (alock->box_node() == oldbox) {
4778
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1821 assert(alock->obj_node()->eqv_uncast(obj), "");
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1822 // Mark eliminated all related locks and unlocks.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1823 alock->set_non_esc_obj();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1824 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1825 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1826 }
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1827 return;
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1828 }
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1829
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1830 // Create new "eliminated" BoxLock node and use it in monitor debug info
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1831 // instead of oldbox for the same object.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1832 BoxLockNode* box = BoxLockNode::box_node(oldbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1833 BoxLockNode* newbox = box->clone()->as_BoxLock();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1834
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1835 // Note: BoxLock node is marked eliminated only here and it is used
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1836 // to indicate that all associated lock and unlock nodes are marked
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1837 // for elimination.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1838 newbox->set_eliminated();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1839 transform_later(newbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1840
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1841 // Replace old box node with new box for all users of the same object.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1842 for (uint i = 0; i < oldbox->outcnt();) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1843 bool next_edge = true;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1844
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1845 Node* u = oldbox->raw_out(i);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1846 if (u->is_AbstractLock()) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1847 AbstractLockNode* alock = u->as_AbstractLock();
4778
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1848 if (alock->box_node() == oldbox && alock->obj_node()->eqv_uncast(obj)) {
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1849 // Replace Box and mark eliminated all related locks and unlocks.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1850 alock->set_non_esc_obj();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1851 _igvn.hash_delete(alock);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1852 alock->set_box_node(newbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1853 _igvn._worklist.push(alock);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1854 next_edge = false;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1855 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1856 }
4778
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1857 if (u->is_FastLock() && u->as_FastLock()->obj_node()->eqv_uncast(obj)) {
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1858 FastLockNode* flock = u->as_FastLock();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1859 assert(flock->box_node() == oldbox, "sanity");
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1860 _igvn.hash_delete(flock);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1861 flock->set_box_node(newbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1862 _igvn._worklist.push(flock);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1863 next_edge = false;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1864 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1865
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1866 // Replace old box in monitor debug info.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1867 if (u->is_SafePoint() && u->as_SafePoint()->jvms()) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1868 SafePointNode* sfn = u->as_SafePoint();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1869 JVMState* youngest_jvms = sfn->jvms();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1870 int max_depth = youngest_jvms->depth();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1871 for (int depth = 1; depth <= max_depth; depth++) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1872 JVMState* jvms = youngest_jvms->of_depth(depth);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1873 int num_mon = jvms->nof_monitors();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1874 // Loop over monitors
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1875 for (int idx = 0; idx < num_mon; idx++) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1876 Node* obj_node = sfn->monitor_obj(jvms, idx);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1877 Node* box_node = sfn->monitor_box(jvms, idx);
4778
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1878 if (box_node == oldbox && obj_node->eqv_uncast(obj)) {
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1879 int j = jvms->monitor_box_offset(idx);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1880 _igvn.hash_delete(u);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1881 u->set_req(j, newbox);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1882 _igvn._worklist.push(u);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1883 next_edge = false;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1884 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1885 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1886 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1887 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1888 if (next_edge) i++;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1889 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1890 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1891
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1892 //-----------------------mark_eliminated_locking_nodes-----------------------
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1893 void PhaseMacroExpand::mark_eliminated_locking_nodes(AbstractLockNode *alock) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1894 if (EliminateNestedLocks) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1895 if (alock->is_nested()) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1896 assert(alock->box_node()->as_BoxLock()->is_eliminated(), "sanity");
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1897 return;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1898 } else if (!alock->is_non_esc_obj()) { // Not eliminated or coarsened
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1899 // Only Lock node has JVMState needed here.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1900 if (alock->jvms() != NULL && alock->as_Lock()->is_nested_lock_region()) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1901 // Mark eliminated related nested locks and unlocks.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1902 Node* obj = alock->obj_node();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1903 BoxLockNode* box_node = alock->box_node()->as_BoxLock();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1904 assert(!box_node->is_eliminated(), "should not be marked yet");
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1905 // Note: BoxLock node is marked eliminated only here
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1906 // and it is used to indicate that all associated lock
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1907 // and unlock nodes are marked for elimination.
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1908 box_node->set_eliminated(); // Box's hash is always NO_HASH here
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1909 for (uint i = 0; i < box_node->outcnt(); i++) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1910 Node* u = box_node->raw_out(i);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1911 if (u->is_AbstractLock()) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1912 alock = u->as_AbstractLock();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1913 if (alock->box_node() == box_node) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1914 // Verify that this Box is referenced only by related locks.
4778
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1915 assert(alock->obj_node()->eqv_uncast(obj), "");
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1916 // Mark all related locks and unlocks.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1917 alock->set_nested();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1918 }
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1919 }
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1920 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1921 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1922 return;
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1923 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1924 // Process locks for non escaping object
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1925 assert(alock->is_non_esc_obj(), "");
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1926 } // EliminateNestedLocks
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1927
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1928 if (alock->is_non_esc_obj()) { // Lock is used for non escaping object
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1929 // Look for all locks of this object and mark them and
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1930 // corresponding BoxLock nodes as eliminated.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1931 Node* obj = alock->obj_node();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1932 for (uint j = 0; j < obj->outcnt(); j++) {
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1933 Node* o = obj->raw_out(j);
4778
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1934 if (o->is_AbstractLock() &&
35acf8f0a2e4 7128352: assert(obj_node == obj) failed
kvn
parents: 4777
diff changeset
1935 o->as_AbstractLock()->obj_node()->eqv_uncast(obj)) {
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1936 alock = o->as_AbstractLock();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1937 Node* box = alock->box_node();
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1938 // Replace old box node with new eliminated box for all users
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1939 // of the same object and mark related locks as eliminated.
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1940 mark_eliminated_box(box, obj);
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1941 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1942 }
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1943 }
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1944 }
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1945
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1946 // we have determined that this lock/unlock can be eliminated, we simply
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1947 // eliminate the node without expanding it.
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1948 //
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1949 // Note: The membar's associated with the lock/unlock are currently not
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1950 // eliminated. This should be investigated as a future enhancement.
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1951 //
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1952 bool PhaseMacroExpand::eliminate_locking_node(AbstractLockNode *alock) {
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1953
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1954 if (!alock->is_eliminated()) {
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1955 return false;
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1956 }
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1957 #ifdef ASSERT
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
1958 if (!alock->is_coarsened()) {
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1959 // Check that new "eliminated" BoxLock node is created.
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1960 BoxLockNode* oldbox = alock->box_node()->as_BoxLock();
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1961 assert(oldbox->is_eliminated(), "should be done already");
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1962 }
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
1963 #endif
1080
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1964 CompileLog* log = C->log();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1965 if (log != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1966 log->head("eliminate_lock lock='%d'",
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1967 alock->is_Lock());
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1968 JVMState* p = alock->jvms();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1969 while (p != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1970 log->elem("jvms bci='%d' method='%d'", p->bci(), log->identify(p->method()));
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1971 p = p->caller();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1972 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1973 log->tail("eliminate_lock");
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1974 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1975
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1976 #ifndef PRODUCT
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1977 if (PrintEliminateLocks) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1978 if (alock->is_Lock()) {
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
1979 tty->print_cr("++++ Eliminated: %d Lock", alock->_idx);
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1980 } else {
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
1981 tty->print_cr("++++ Eliminated: %d Unlock", alock->_idx);
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1982 }
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1983 }
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1984 #endif
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1985
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1986 Node* mem = alock->in(TypeFunc::Memory);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1987 Node* ctrl = alock->in(TypeFunc::Control);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1988
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1989 extract_call_projections(alock);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1990 // There are 2 projections from the lock. The lock node will
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1991 // be deleted when its last use is subsumed below.
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1992 assert(alock->outcnt() == 2 &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1993 _fallthroughproj != NULL &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1994 _memproj_fallthrough != NULL,
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1995 "Unexpected projections from Lock/Unlock");
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1996
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1997 Node* fallthroughproj = _fallthroughproj;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1998 Node* memproj_fallthrough = _memproj_fallthrough;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1999
a61af66fc99e Initial load
duke
parents:
diff changeset
2000 // The memory projection from a lock/unlock is RawMem
a61af66fc99e Initial load
duke
parents:
diff changeset
2001 // The input to a Lock is merged memory, so extract its RawMem input
a61af66fc99e Initial load
duke
parents:
diff changeset
2002 // (unless the MergeMem has been optimized away.)
a61af66fc99e Initial load
duke
parents:
diff changeset
2003 if (alock->is_Lock()) {
3849
f1c12354c3f7 7074017: Introduce MemBarAcquireLock/MemBarReleaseLock nodes for monitor enter/exit code paths
roland
parents: 3788
diff changeset
2004 // Seach for MemBarAcquireLock node and delete it also.
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2005 MemBarNode* membar = fallthroughproj->unique_ctrl_out()->as_MemBar();
3849
f1c12354c3f7 7074017: Introduce MemBarAcquireLock/MemBarReleaseLock nodes for monitor enter/exit code paths
roland
parents: 3788
diff changeset
2006 assert(membar != NULL && membar->Opcode() == Op_MemBarAcquireLock, "");
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2007 Node* ctrlproj = membar->proj_out(TypeFunc::Control);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2008 Node* memproj = membar->proj_out(TypeFunc::Memory);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2009 _igvn.replace_node(ctrlproj, fallthroughproj);
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2010 _igvn.replace_node(memproj, memproj_fallthrough);
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2011
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2012 // Delete FastLock node also if this Lock node is unique user
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2013 // (a loop peeling may clone a Lock node).
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2014 Node* flock = alock->as_Lock()->fastlock_node();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2015 if (flock->outcnt() == 1) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2016 assert(flock->unique_out() == alock, "sanity");
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2017 _igvn.replace_node(flock, top());
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2018 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2019 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2020
3849
f1c12354c3f7 7074017: Introduce MemBarAcquireLock/MemBarReleaseLock nodes for monitor enter/exit code paths
roland
parents: 3788
diff changeset
2021 // Seach for MemBarReleaseLock node and delete it also.
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2022 if (alock->is_Unlock() && ctrl != NULL && ctrl->is_Proj() &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2023 ctrl->in(0)->is_MemBar()) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2024 MemBarNode* membar = ctrl->in(0)->as_MemBar();
3849
f1c12354c3f7 7074017: Introduce MemBarAcquireLock/MemBarReleaseLock nodes for monitor enter/exit code paths
roland
parents: 3788
diff changeset
2025 assert(membar->Opcode() == Op_MemBarReleaseLock &&
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2026 mem->is_Proj() && membar == mem->in(0), "");
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2027 _igvn.replace_node(fallthroughproj, ctrl);
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2028 _igvn.replace_node(memproj_fallthrough, mem);
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2029 fallthroughproj = ctrl;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2030 memproj_fallthrough = mem;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2031 ctrl = membar->in(TypeFunc::Control);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2032 mem = membar->in(TypeFunc::Memory);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2033 }
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2034
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2035 _igvn.replace_node(fallthroughproj, ctrl);
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2036 _igvn.replace_node(memproj_fallthrough, mem);
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2037 return true;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2038 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2039
a61af66fc99e Initial load
duke
parents:
diff changeset
2040
a61af66fc99e Initial load
duke
parents:
diff changeset
2041 //------------------------------expand_lock_node----------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
2042 void PhaseMacroExpand::expand_lock_node(LockNode *lock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2043
a61af66fc99e Initial load
duke
parents:
diff changeset
2044 Node* ctrl = lock->in(TypeFunc::Control);
a61af66fc99e Initial load
duke
parents:
diff changeset
2045 Node* mem = lock->in(TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
2046 Node* obj = lock->obj_node();
a61af66fc99e Initial load
duke
parents:
diff changeset
2047 Node* box = lock->box_node();
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2048 Node* flock = lock->fastlock_node();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2049
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
2050 assert(!BoxLockNode::box_node(box)->is_eliminated(), "sanity");
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
2051
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2052 // Make the merge point
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2053 Node *region;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2054 Node *mem_phi;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2055 Node *slow_path;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2056
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2057 if (UseOptoBiasInlining) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2058 /*
605
98cb887364d3 6810672: Comment typos
twisti
parents: 601
diff changeset
2059 * See the full description in MacroAssembler::biased_locking_enter().
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2060 *
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2061 * if( (mark_word & biased_lock_mask) == biased_lock_pattern ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2062 * // The object is biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2063 * proto_node = klass->prototype_header;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2064 * o_node = thread | proto_node;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2065 * x_node = o_node ^ mark_word;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2066 * if( (x_node & ~age_mask) == 0 ) { // Biased to the current thread ?
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2067 * // Done.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2068 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2069 * if( (x_node & biased_lock_mask) != 0 ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2070 * // The klass's prototype header is no longer biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2071 * cas(&mark_word, mark_word, proto_node)
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2072 * goto cas_lock;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2073 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2074 * // The klass's prototype header is still biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2075 * if( (x_node & epoch_mask) != 0 ) { // Expired epoch?
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2076 * old = mark_word;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2077 * new = o_node;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2078 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2079 * // Different thread or anonymous biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2080 * old = mark_word & (epoch_mask | age_mask | biased_lock_mask);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2081 * new = thread | old;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2082 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2083 * // Try to rebias.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2084 * if( cas(&mark_word, old, new) == 0 ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2085 * // Done.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2086 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2087 * goto slow_path; // Failed.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2088 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2089 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2090 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2091 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2092 * // The object is not biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2093 * cas_lock:
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2094 * if( FastLock(obj) == 0 ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2095 * // Done.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2096 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2097 * slow_path:
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2098 * OptoRuntime::complete_monitor_locking_Java(obj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2099 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2100 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2101 */
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2102
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2103 region = new (C, 5) RegionNode(5);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2104 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2105 mem_phi = new (C, 5) PhiNode( region, Type::MEMORY, TypeRawPtr::BOTTOM);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2106
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2107 Node* fast_lock_region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2108 Node* fast_lock_mem_phi = new (C, 3) PhiNode( fast_lock_region, Type::MEMORY, TypeRawPtr::BOTTOM);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2109
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2110 // First, check mark word for the biased lock pattern.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2111 Node* mark_node = make_load(ctrl, mem, obj, oopDesc::mark_offset_in_bytes(), TypeX_X, TypeX_X->basic_type());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2112
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2113 // Get fast path - mark word has the biased lock pattern.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2114 ctrl = opt_bits_test(ctrl, fast_lock_region, 1, mark_node,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2115 markOopDesc::biased_lock_mask_in_place,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2116 markOopDesc::biased_lock_pattern, true);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2117 // fast_lock_region->in(1) is set to slow path.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2118 fast_lock_mem_phi->init_req(1, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2119
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2120 // Now check that the lock is biased to the current thread and has
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2121 // the same epoch and bias as Klass::_prototype_header.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2122
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2123 // Special-case a fresh allocation to avoid building nodes:
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2124 Node* klass_node = AllocateNode::Ideal_klass(obj, &_igvn);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2125 if (klass_node == NULL) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2126 Node* k_adr = basic_plus_adr(obj, oopDesc::klass_offset_in_bytes());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2127 klass_node = transform_later( LoadKlassNode::make(_igvn, mem, k_adr, _igvn.type(k_adr)->is_ptr()) );
490
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2128 #ifdef _LP64
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2129 if (UseCompressedOops && klass_node->is_DecodeN()) {
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2130 assert(klass_node->in(1)->Opcode() == Op_LoadNKlass, "sanity");
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2131 klass_node->in(1)->init_req(0, ctrl);
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2132 } else
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2133 #endif
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
2134 klass_node->init_req(0, ctrl);
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2135 }
4762
069ab3f976d3 7118863: Move sizeof(klassOopDesc) into the *Klass::*_offset_in_bytes() functions
stefank
parents: 4115
diff changeset
2136 Node *proto_node = make_load(ctrl, mem, klass_node, in_bytes(Klass::prototype_header_offset()), TypeX_X, TypeX_X->basic_type());
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2137
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2138 Node* thread = transform_later(new (C, 1) ThreadLocalNode());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2139 Node* cast_thread = transform_later(new (C, 2) CastP2XNode(ctrl, thread));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2140 Node* o_node = transform_later(new (C, 3) OrXNode(cast_thread, proto_node));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2141 Node* x_node = transform_later(new (C, 3) XorXNode(o_node, mark_node));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2142
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2143 // Get slow path - mark word does NOT match the value.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2144 Node* not_biased_ctrl = opt_bits_test(ctrl, region, 3, x_node,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2145 (~markOopDesc::age_mask_in_place), 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2146 // region->in(3) is set to fast path - the object is biased to the current thread.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2147 mem_phi->init_req(3, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2148
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2149
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2150 // Mark word does NOT match the value (thread | Klass::_prototype_header).
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2151
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2152
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2153 // First, check biased pattern.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2154 // Get fast path - _prototype_header has the same biased lock pattern.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2155 ctrl = opt_bits_test(not_biased_ctrl, fast_lock_region, 2, x_node,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2156 markOopDesc::biased_lock_mask_in_place, 0, true);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2157
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2158 not_biased_ctrl = fast_lock_region->in(2); // Slow path
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2159 // fast_lock_region->in(2) - the prototype header is no longer biased
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2160 // and we have to revoke the bias on this object.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2161 // We are going to try to reset the mark of this object to the prototype
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2162 // value and fall through to the CAS-based locking scheme.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2163 Node* adr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2164 Node* cas = new (C, 5) StoreXConditionalNode(not_biased_ctrl, mem, adr,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2165 proto_node, mark_node);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2166 transform_later(cas);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2167 Node* proj = transform_later( new (C, 1) SCMemProjNode(cas));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2168 fast_lock_mem_phi->init_req(2, proj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2169
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2170
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2171 // Second, check epoch bits.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2172 Node* rebiased_region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2173 Node* old_phi = new (C, 3) PhiNode( rebiased_region, TypeX_X);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2174 Node* new_phi = new (C, 3) PhiNode( rebiased_region, TypeX_X);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2175
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2176 // Get slow path - mark word does NOT match epoch bits.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2177 Node* epoch_ctrl = opt_bits_test(ctrl, rebiased_region, 1, x_node,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2178 markOopDesc::epoch_mask_in_place, 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2179 // The epoch of the current bias is not valid, attempt to rebias the object
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2180 // toward the current thread.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2181 rebiased_region->init_req(2, epoch_ctrl);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2182 old_phi->init_req(2, mark_node);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2183 new_phi->init_req(2, o_node);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2184
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2185 // rebiased_region->in(1) is set to fast path.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2186 // The epoch of the current bias is still valid but we know
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2187 // nothing about the owner; it might be set or it might be clear.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2188 Node* cmask = MakeConX(markOopDesc::biased_lock_mask_in_place |
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2189 markOopDesc::age_mask_in_place |
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2190 markOopDesc::epoch_mask_in_place);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2191 Node* old = transform_later(new (C, 3) AndXNode(mark_node, cmask));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2192 cast_thread = transform_later(new (C, 2) CastP2XNode(ctrl, thread));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2193 Node* new_mark = transform_later(new (C, 3) OrXNode(cast_thread, old));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2194 old_phi->init_req(1, old);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2195 new_phi->init_req(1, new_mark);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2196
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2197 transform_later(rebiased_region);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2198 transform_later(old_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2199 transform_later(new_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2200
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2201 // Try to acquire the bias of the object using an atomic operation.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2202 // If this fails we will go in to the runtime to revoke the object's bias.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2203 cas = new (C, 5) StoreXConditionalNode(rebiased_region, mem, adr,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2204 new_phi, old_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2205 transform_later(cas);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2206 proj = transform_later( new (C, 1) SCMemProjNode(cas));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2207
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2208 // Get slow path - Failed to CAS.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2209 not_biased_ctrl = opt_bits_test(rebiased_region, region, 4, cas, 0, 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2210 mem_phi->init_req(4, proj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2211 // region->in(4) is set to fast path - the object is rebiased to the current thread.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2212
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2213 // Failed to CAS.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2214 slow_path = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2215 Node *slow_mem = new (C, 3) PhiNode( slow_path, Type::MEMORY, TypeRawPtr::BOTTOM);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2216
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2217 slow_path->init_req(1, not_biased_ctrl); // Capture slow-control
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2218 slow_mem->init_req(1, proj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2219
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2220 // Call CAS-based locking scheme (FastLock node).
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2221
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2222 transform_later(fast_lock_region);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2223 transform_later(fast_lock_mem_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2224
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2225 // Get slow path - FastLock failed to lock the object.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2226 ctrl = opt_bits_test(fast_lock_region, region, 2, flock, 0, 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2227 mem_phi->init_req(2, fast_lock_mem_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2228 // region->in(2) is set to fast path - the object is locked to the current thread.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2229
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2230 slow_path->init_req(2, ctrl); // Capture slow-control
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2231 slow_mem->init_req(2, fast_lock_mem_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2232
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2233 transform_later(slow_path);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2234 transform_later(slow_mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2235 // Reset lock's memory edge.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2236 lock->set_req(TypeFunc::Memory, slow_mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2237
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2238 } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2239 region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2240 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2241 mem_phi = new (C, 3) PhiNode( region, Type::MEMORY, TypeRawPtr::BOTTOM);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2242
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2243 // Optimize test; set region slot 2
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2244 slow_path = opt_bits_test(ctrl, region, 2, flock, 0, 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2245 mem_phi->init_req(2, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2246 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2247
a61af66fc99e Initial load
duke
parents:
diff changeset
2248 // Make slow path call
a61af66fc99e Initial load
duke
parents:
diff changeset
2249 CallNode *call = make_slow_call( (CallNode *) lock, OptoRuntime::complete_monitor_enter_Type(), OptoRuntime::complete_monitor_locking_Java(), NULL, slow_path, obj, box );
a61af66fc99e Initial load
duke
parents:
diff changeset
2250
a61af66fc99e Initial load
duke
parents:
diff changeset
2251 extract_call_projections(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
2252
a61af66fc99e Initial load
duke
parents:
diff changeset
2253 // Slow path can only throw asynchronous exceptions, which are always
a61af66fc99e Initial load
duke
parents:
diff changeset
2254 // de-opted. So the compiler thinks the slow-call can never throw an
a61af66fc99e Initial load
duke
parents:
diff changeset
2255 // exception. If it DOES throw an exception we would need the debug
a61af66fc99e Initial load
duke
parents:
diff changeset
2256 // info removed first (since if it throws there is no monitor).
a61af66fc99e Initial load
duke
parents:
diff changeset
2257 assert ( _ioproj_fallthrough == NULL && _ioproj_catchall == NULL &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2258 _memproj_catchall == NULL && _catchallcatchproj == NULL, "Unexpected projection from Lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
2259
a61af66fc99e Initial load
duke
parents:
diff changeset
2260 // Capture slow path
a61af66fc99e Initial load
duke
parents:
diff changeset
2261 // disconnect fall-through projection from call and create a new one
a61af66fc99e Initial load
duke
parents:
diff changeset
2262 // hook up users of fall-through projection to region
a61af66fc99e Initial load
duke
parents:
diff changeset
2263 Node *slow_ctrl = _fallthroughproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
2264 transform_later(slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2265 _igvn.hash_delete(_fallthroughproj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2266 _fallthroughproj->disconnect_inputs(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2267 region->init_req(1, slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2268 // region inputs are now complete
a61af66fc99e Initial load
duke
parents:
diff changeset
2269 transform_later(region);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2270 _igvn.replace_node(_fallthroughproj, region);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2271
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2272 Node *memproj = transform_later( new(C, 1) ProjNode(call, TypeFunc::Memory) );
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2273 mem_phi->init_req(1, memproj );
a61af66fc99e Initial load
duke
parents:
diff changeset
2274 transform_later(mem_phi);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2275 _igvn.replace_node(_memproj_fallthrough, mem_phi);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2276 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2277
a61af66fc99e Initial load
duke
parents:
diff changeset
2278 //------------------------------expand_unlock_node----------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
2279 void PhaseMacroExpand::expand_unlock_node(UnlockNode *unlock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2280
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2281 Node* ctrl = unlock->in(TypeFunc::Control);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2282 Node* mem = unlock->in(TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
2283 Node* obj = unlock->obj_node();
a61af66fc99e Initial load
duke
parents:
diff changeset
2284 Node* box = unlock->box_node();
a61af66fc99e Initial load
duke
parents:
diff changeset
2285
4777
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
2286 assert(!BoxLockNode::box_node(box)->is_eliminated(), "sanity");
e9a5e0a812c8 7125896: Eliminate nested locks
kvn
parents: 4769
diff changeset
2287
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2288 // No need for a null check on unlock
a61af66fc99e Initial load
duke
parents:
diff changeset
2289
a61af66fc99e Initial load
duke
parents:
diff changeset
2290 // Make the merge point
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2291 Node *region;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2292 Node *mem_phi;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2293
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2294 if (UseOptoBiasInlining) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2295 // Check for biased locking unlock case, which is a no-op.
605
98cb887364d3 6810672: Comment typos
twisti
parents: 601
diff changeset
2296 // See the full description in MacroAssembler::biased_locking_exit().
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2297 region = new (C, 4) RegionNode(4);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2298 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2299 mem_phi = new (C, 4) PhiNode( region, Type::MEMORY, TypeRawPtr::BOTTOM);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2300 mem_phi->init_req(3, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2301
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2302 Node* mark_node = make_load(ctrl, mem, obj, oopDesc::mark_offset_in_bytes(), TypeX_X, TypeX_X->basic_type());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2303 ctrl = opt_bits_test(ctrl, region, 3, mark_node,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2304 markOopDesc::biased_lock_mask_in_place,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2305 markOopDesc::biased_lock_pattern);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2306 } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2307 region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2308 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2309 mem_phi = new (C, 3) PhiNode( region, Type::MEMORY, TypeRawPtr::BOTTOM);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2310 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2311
a61af66fc99e Initial load
duke
parents:
diff changeset
2312 FastUnlockNode *funlock = new (C, 3) FastUnlockNode( ctrl, obj, box );
a61af66fc99e Initial load
duke
parents:
diff changeset
2313 funlock = transform_later( funlock )->as_FastUnlock();
a61af66fc99e Initial load
duke
parents:
diff changeset
2314 // Optimize test; set region slot 2
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2315 Node *slow_path = opt_bits_test(ctrl, region, 2, funlock, 0, 0);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2316
a61af66fc99e Initial load
duke
parents:
diff changeset
2317 CallNode *call = make_slow_call( (CallNode *) unlock, OptoRuntime::complete_monitor_exit_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C), "complete_monitor_unlocking_C", slow_path, obj, box );
a61af66fc99e Initial load
duke
parents:
diff changeset
2318
a61af66fc99e Initial load
duke
parents:
diff changeset
2319 extract_call_projections(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
2320
a61af66fc99e Initial load
duke
parents:
diff changeset
2321 assert ( _ioproj_fallthrough == NULL && _ioproj_catchall == NULL &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2322 _memproj_catchall == NULL && _catchallcatchproj == NULL, "Unexpected projection from Lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
2323
a61af66fc99e Initial load
duke
parents:
diff changeset
2324 // No exceptions for unlocking
a61af66fc99e Initial load
duke
parents:
diff changeset
2325 // Capture slow path
a61af66fc99e Initial load
duke
parents:
diff changeset
2326 // disconnect fall-through projection from call and create a new one
a61af66fc99e Initial load
duke
parents:
diff changeset
2327 // hook up users of fall-through projection to region
a61af66fc99e Initial load
duke
parents:
diff changeset
2328 Node *slow_ctrl = _fallthroughproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
2329 transform_later(slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2330 _igvn.hash_delete(_fallthroughproj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2331 _fallthroughproj->disconnect_inputs(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2332 region->init_req(1, slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2333 // region inputs are now complete
a61af66fc99e Initial load
duke
parents:
diff changeset
2334 transform_later(region);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2335 _igvn.replace_node(_fallthroughproj, region);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2336
a61af66fc99e Initial load
duke
parents:
diff changeset
2337 Node *memproj = transform_later( new(C, 1) ProjNode(call, TypeFunc::Memory) );
a61af66fc99e Initial load
duke
parents:
diff changeset
2338 mem_phi->init_req(1, memproj );
a61af66fc99e Initial load
duke
parents:
diff changeset
2339 mem_phi->init_req(2, mem);
a61af66fc99e Initial load
duke
parents:
diff changeset
2340 transform_later(mem_phi);
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2341 _igvn.replace_node(_memproj_fallthrough, mem_phi);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2342 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2343
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2344 //---------------------------eliminate_macro_nodes----------------------
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2345 // Eliminate scalar replaced allocations and associated locks.
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2346 void PhaseMacroExpand::eliminate_macro_nodes() {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2347 if (C->macro_count() == 0)
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2348 return;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2349
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2350 // First, attempt to eliminate locks
3754
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2351 int cnt = C->macro_count();
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2352 for (int i=0; i < cnt; i++) {
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2353 Node *n = C->macro_node(i);
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2354 if (n->is_AbstractLock()) { // Lock and Unlock nodes
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2355 // Before elimination mark all associated (same box and obj)
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2356 // lock and unlock nodes.
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2357 mark_eliminated_locking_nodes(n->as_AbstractLock());
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2358 }
642c68c75db9 7050280: assert(u->as_Unlock()->is_eliminated()) failed: sanity
kvn
parents: 3345
diff changeset
2359 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2360 bool progress = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2361 while (progress) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2362 progress = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2363 for (int i = C->macro_count(); i > 0; i--) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2364 Node * n = C->macro_node(i-1);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2365 bool success = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2366 debug_only(int old_macro_count = C->macro_count(););
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2367 if (n->is_AbstractLock()) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2368 success = eliminate_locking_node(n->as_AbstractLock());
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2369 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2370 assert(success == (C->macro_count() < old_macro_count), "elimination reduces macro count");
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2371 progress = progress || success;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2372 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2373 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2374 // Next, attempt to eliminate allocations
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2375 progress = true;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2376 while (progress) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2377 progress = false;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2378 for (int i = C->macro_count(); i > 0; i--) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2379 Node * n = C->macro_node(i-1);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2380 bool success = false;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2381 debug_only(int old_macro_count = C->macro_count(););
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2382 switch (n->class_id()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2383 case Node::Class_Allocate:
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2384 case Node::Class_AllocateArray:
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2385 success = eliminate_allocate_node(n->as_Allocate());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2386 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2387 case Node::Class_Lock:
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2388 case Node::Class_Unlock:
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2389 assert(!n->as_AbstractLock()->is_eliminated(), "sanity");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2390 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2391 default:
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2392 assert(n->Opcode() == Op_LoopLimit ||
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2393 n->Opcode() == Op_Opaque1 ||
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2394 n->Opcode() == Op_Opaque2, "unknown node type in macro list");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2395 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2396 assert(success == (C->macro_count() < old_macro_count), "elimination reduces macro count");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2397 progress = progress || success;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2398 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2399 }
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2400 }
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2401
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2402 //------------------------------expand_macro_nodes----------------------
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2403 // Returns true if a failure occurred.
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2404 bool PhaseMacroExpand::expand_macro_nodes() {
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2405 // Last attempt to eliminate macro nodes.
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2406 eliminate_macro_nodes();
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2407
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2408 // Make sure expansion will not cause node limit to be exceeded.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2409 // Worst case is a macro node gets expanded into about 50 nodes.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2410 // Allow 50% more for optimization.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2411 if (C->check_node_count(C->macro_count() * 75, "out of nodes before macro expansion" ) )
a61af66fc99e Initial load
duke
parents:
diff changeset
2412 return true;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2413
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2414 // Eliminate Opaque and LoopLimit nodes. Do it after all loop optimizations.
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2415 bool progress = true;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2416 while (progress) {
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2417 progress = false;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2418 for (int i = C->macro_count(); i > 0; i--) {
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2419 Node * n = C->macro_node(i-1);
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2420 bool success = false;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2421 debug_only(int old_macro_count = C->macro_count(););
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2422 if (n->Opcode() == Op_LoopLimit) {
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2423 // Remove it from macro list and put on IGVN worklist to optimize.
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2424 C->remove_macro_node(n);
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2425 _igvn._worklist.push(n);
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2426 success = true;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2427 } else if (n->Opcode() == Op_Opaque1 || n->Opcode() == Op_Opaque2) {
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2428 _igvn.replace_node(n, n->in(1));
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2429 success = true;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2430 }
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2431 assert(success == (C->macro_count() < old_macro_count), "elimination reduces macro count");
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2432 progress = progress || success;
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2433 }
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2434 }
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2435
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2436 // expand "macro" nodes
a61af66fc99e Initial load
duke
parents:
diff changeset
2437 // nodes are removed from the macro list as they are processed
a61af66fc99e Initial load
duke
parents:
diff changeset
2438 while (C->macro_count() > 0) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2439 int macro_count = C->macro_count();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2440 Node * n = C->macro_node(macro_count-1);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2441 assert(n->is_macro(), "only macro nodes expected here");
a61af66fc99e Initial load
duke
parents:
diff changeset
2442 if (_igvn.type(n) == Type::TOP || n->in(0)->is_top() ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2443 // node is unreachable, so don't try to expand it
a61af66fc99e Initial load
duke
parents:
diff changeset
2444 C->remove_macro_node(n);
a61af66fc99e Initial load
duke
parents:
diff changeset
2445 continue;
a61af66fc99e Initial load
duke
parents:
diff changeset
2446 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2447 switch (n->class_id()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2448 case Node::Class_Allocate:
a61af66fc99e Initial load
duke
parents:
diff changeset
2449 expand_allocate(n->as_Allocate());
a61af66fc99e Initial load
duke
parents:
diff changeset
2450 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2451 case Node::Class_AllocateArray:
a61af66fc99e Initial load
duke
parents:
diff changeset
2452 expand_allocate_array(n->as_AllocateArray());
a61af66fc99e Initial load
duke
parents:
diff changeset
2453 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2454 case Node::Class_Lock:
a61af66fc99e Initial load
duke
parents:
diff changeset
2455 expand_lock_node(n->as_Lock());
a61af66fc99e Initial load
duke
parents:
diff changeset
2456 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2457 case Node::Class_Unlock:
a61af66fc99e Initial load
duke
parents:
diff changeset
2458 expand_unlock_node(n->as_Unlock());
a61af66fc99e Initial load
duke
parents:
diff changeset
2459 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2460 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
2461 assert(false, "unknown node type in macro list");
a61af66fc99e Initial load
duke
parents:
diff changeset
2462 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2463 assert(C->macro_count() < macro_count, "must have deleted a node from macro list");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2464 if (C->failing()) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
2465 }
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
2466
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
2467 _igvn.set_delay_transform(false);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2468 _igvn.optimize();
4115
1bd45abaa507 6890673: Eliminate allocations immediately after EA
kvn
parents: 3961
diff changeset
2469 if (C->failing()) return true;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2470 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
2471 }