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annotate src/share/vm/opto/macro.cpp @ 1972:f95d63e2154a

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6989984: Use standard include model for Hospot Summary: Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
author stefank
date Tue, 23 Nov 2010 13:22:55 -0800
parents e5dfb3ccb88b
children b1a2afa37ec4
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1 /*
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2 * Copyright (c) 2005, 2010, 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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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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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, newcall->in(0)); // 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
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parents:
diff changeset
178 const Node *cn = pn->fast_out(j);
a61af66fc99e Initial load
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parents:
diff changeset
179 if (cn->is_Catch()) {
a61af66fc99e Initial load
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parents:
diff changeset
180 ProjNode *cpn = NULL;
a61af66fc99e Initial load
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parents:
diff changeset
181 for (DUIterator_Fast kmax, k = cn->fast_outs(kmax); k < kmax; k++) {
a61af66fc99e Initial load
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parents:
diff changeset
182 cpn = cn->fast_out(k)->as_Proj();
a61af66fc99e Initial load
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parents:
diff changeset
183 assert(cpn->is_CatchProj(), "must be a CatchProjNode");
a61af66fc99e Initial load
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parents:
diff changeset
184 if (cpn->_con == CatchProjNode::fall_through_index)
a61af66fc99e Initial load
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parents:
diff changeset
185 _fallthroughcatchproj = cpn;
a61af66fc99e Initial load
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parents:
diff changeset
186 else {
a61af66fc99e Initial load
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parents:
diff changeset
187 assert(cpn->_con == CatchProjNode::catch_all_index, "must be correct index.");
a61af66fc99e Initial load
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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
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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
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parents:
diff changeset
209 default:
a61af66fc99e Initial load
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parents:
diff changeset
210 assert(false, "unexpected projection from allocation node.");
a61af66fc99e Initial load
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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
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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
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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
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parents: 780
diff changeset
223 for (DUIterator_Last jmin, j = addp->last_outs(jmin); j >= jmin; --j) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
224 Node *st = addp->last_out(j);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
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parents: 780
diff changeset
225 assert(st->is_Store(), "store required");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
226 _igvn.replace_node(st, st->in(MemNode::Memory));
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
227 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
228 } else {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
229 // G1 pre/post barriers
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
230 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
231 // 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
232 // 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
233 // 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
234
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
235 // Remove G1 post barrier.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
236
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
237 // Search for CastP2X->Xor->URShift->Cmp path which
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
238 // 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
239 // 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
240 Node* xorx = NULL;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
241 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
242 Node* u = p2x->fast_out(i);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
243 if (u->Opcode() == Op_XorX) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
244 xorx = u;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
245 break;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
246 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
247 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
248 assert(xorx != NULL, "missing G1 post barrier");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
249 Node* shift = xorx->unique_out();
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
250 Node* cmpx = shift->unique_out();
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
251 assert(cmpx->is_Cmp() && cmpx->unique_out()->is_Bool() &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
252 cmpx->unique_out()->as_Bool()->_test._test == BoolTest::ne,
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
253 "missing region check in G1 post barrier");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
254 _igvn.replace_node(cmpx, makecon(TypeInt::CC_EQ));
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
255
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
256 // Remove G1 pre barrier.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
257
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
258 // 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
259 Node* this_region = p2x->in(0);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
260 assert(this_region != NULL, "");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
261 // 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
262 // (for example, after initialization).
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
263 if (this_region->is_Region() && this_region->req() == 3) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
264 int ind = 1;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
265 if (!this_region->in(ind)->is_IfFalse()) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
266 ind = 2;
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
267 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
268 if (this_region->in(ind)->is_IfFalse()) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
269 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
270 assert(bol->is_Bool(), "");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
271 cmpx = bol->in(1);
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
272 if (bol->as_Bool()->_test._test == BoolTest::ne &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
273 cmpx->is_Cmp() && cmpx->in(2) == intcon(0) &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
274 cmpx->in(1)->is_Load()) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
275 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
276 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
277 PtrQueue::byte_offset_of_active());
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
278 if (adr->is_AddP() && adr->in(AddPNode::Base) == top() &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
279 adr->in(AddPNode::Address)->Opcode() == Op_ThreadLocal &&
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
280 adr->in(AddPNode::Offset) == MakeConX(marking_offset)) {
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
281 _igvn.replace_node(cmpx, makecon(TypeInt::CC_EQ));
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
282 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
283 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
284 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
285 }
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
286 // 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
287 // which currently still alive until igvn optimize it.
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
288 assert(p2x->unique_out()->Opcode() == Op_URShiftX, "");
fc4be448891f 6851742: (EA) allocation elimination doesn't work with UseG1GC
kvn
parents: 780
diff changeset
289 _igvn.replace_node(p2x, top());
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
290 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
291 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
292
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
293 // 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
294 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
295 Node *orig_mem = mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
296 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
297 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
298 while (true) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
299 if (mem == alloc_mem || mem == start_mem ) {
605
98cb887364d3 6810672: Comment typos
twisti
parents: 601
diff changeset
300 return mem; // hit one of our sentinels
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
301 } else if (mem->is_MergeMem()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
302 mem = mem->as_MergeMem()->memory_at(alias_idx);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
303 } 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
304 Node *in = mem->in(0);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
305 // 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
306 // already know that the object is safe to eliminate.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
307 if (in->is_Initialize() && in->as_Initialize()->allocation() == alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
308 return in;
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
309 } else if (in->is_Call()) {
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
310 CallNode *call = in->as_Call();
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
311 if (!call->may_modify(tinst, phase)) {
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
312 mem = call->in(TypeFunc::Memory);
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
313 }
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
314 mem = in->in(TypeFunc::Memory);
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
315 } else if (in->is_MemBar()) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
316 mem = in->in(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
317 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
318 assert(false, "unexpected projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
319 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
320 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
321 const TypePtr* atype = mem->as_Store()->adr_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
322 int adr_idx = Compile::current()->get_alias_index(atype);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
323 if (adr_idx == alias_idx) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
324 assert(atype->isa_oopptr(), "address type must be oopptr");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
325 int adr_offset = atype->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
326 uint adr_iid = atype->is_oopptr()->instance_id();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
327 // Array elements references have the same alias_idx
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
328 // but different offset and different instance_id.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
329 if (adr_offset == offset && adr_iid == alloc->_idx)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
330 return mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
331 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
332 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
333 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
334 mem = mem->in(MemNode::Memory);
1100
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
335 } else if (mem->is_ClearArray()) {
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
336 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
337 // Can not bypass initialization of the instance
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
338 // we are looking.
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
339 debug_only(intptr_t offset;)
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
340 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
341 InitializeNode* init = alloc->as_Allocate()->initialization();
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
342 // 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
343 // or memory edge from Allocate node.
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
344 if (init != NULL)
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
345 return init;
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
346 else
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
347 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
348 }
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
349 // Otherwise skip it (the call updated 'mem' value).
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
350 } else if (mem->Opcode() == Op_SCMemProj) {
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
351 assert(mem->in(0)->is_LoadStore(), "sanity");
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
352 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
353 int adr_idx = Compile::current()->get_alias_index(atype);
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
354 if (adr_idx == alias_idx) {
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
355 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
356 return NULL;
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
357 }
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
358 mem = mem->in(0)->in(MemNode::Memory);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
359 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
360 return mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
361 }
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
362 assert(mem != orig_mem, "dead memory loop");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
363 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
364 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
365
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
366 //
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
367 // 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
368 // on the input paths.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
369 // 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
370 // 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
371 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
372 assert(mem->is_Phi(), "sanity");
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
373 int alias_idx = C->get_alias_index(adr_t);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
374 int offset = adr_t->offset();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
375 int instance_id = adr_t->instance_id();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
376
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
377 // Check if an appropriate value phi already exists.
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
378 Node* region = mem->in(0);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
379 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
380 Node* phi = region->fast_out(k);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
381 if (phi->is_Phi() && phi != mem &&
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
382 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
383 return phi;
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
384 }
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
385 }
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
386 // Check if an appropriate new value phi already exists.
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
387 Node* new_phi = NULL;
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
388 uint size = value_phis->size();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
389 for (uint i=0; i < size; i++) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
390 if ( mem->_idx == value_phis->index_at(i) ) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
391 return value_phis->node_at(i);
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 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
394
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
395 if (level <= 0) {
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
396 return NULL; // Give up: phi tree too deep
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 Node *start_mem = C->start()->proj_out(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
399 Node *alloc_mem = alloc->in(TypeFunc::Memory);
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 uint length = mem->req();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
402 GrowableArray <Node *> values(length, length, NULL);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
403
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
404 // create a new Phi for the value
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
405 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
406 transform_later(phi);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
407 value_phis->push(phi, mem->_idx);
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
408
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
409 for (uint j = 1; j < length; j++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
410 Node *in = mem->in(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
411 if (in == NULL || in->is_top()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
412 values.at_put(j, in);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
413 } else {
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
414 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
415 if (val == start_mem || val == alloc_mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
416 // hit a sentinel, return appropriate 0 value
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
417 values.at_put(j, _igvn.zerocon(ft));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
418 continue;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
419 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
420 if (val->is_Initialize()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
421 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
422 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
423 if (val == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
424 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
425 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
426 if (val == mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
427 values.at_put(j, mem);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
428 } else if (val->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
429 values.at_put(j, val->in(MemNode::ValueIn));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
430 } else if(val->is_Proj() && val->in(0) == alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
431 values.at_put(j, _igvn.zerocon(ft));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
432 } else if (val->is_Phi()) {
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
433 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
434 if (val == NULL) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
435 return NULL;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
436 }
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
437 values.at_put(j, val);
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
438 } else if (val->Opcode() == Op_SCMemProj) {
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
439 assert(val->in(0)->is_LoadStore(), "sanity");
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
440 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
441 return NULL;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
442 } else {
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
443 #ifdef ASSERT
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
444 val->dump();
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
445 assert(false, "unknown node on this path");
584
49a36a80b0c7 6802499: EA: assert(false,"unknown node on this path")
kvn
parents: 565
diff changeset
446 #endif
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
447 return NULL; // unknown node on this path
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
448 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
449 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
450 }
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
451 // Set Phi's inputs
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
452 for (uint j = 1; j < length; j++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
453 if (values.at(j) == mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
454 phi->init_req(j, phi);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
455 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
456 phi->init_req(j, values.at(j));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
457 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
458 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
459 return phi;
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 // 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
463 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
464 assert(adr_t->is_known_instance_field(), "instance required");
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
465 int instance_id = adr_t->instance_id();
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
466 assert((uint)instance_id == alloc->_idx, "wrong allocation");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
467
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
468 int alias_idx = C->get_alias_index(adr_t);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
469 int offset = adr_t->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
470 Node *start_mem = C->start()->proj_out(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
471 Node *alloc_ctrl = alloc->in(TypeFunc::Control);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
472 Node *alloc_mem = alloc->in(TypeFunc::Memory);
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
473 Arena *a = Thread::current()->resource_area();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
474 VectorSet visited(a);
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
475
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
476
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
477 bool done = sfpt_mem == alloc_mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
478 Node *mem = sfpt_mem;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
479 while (!done) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
480 if (visited.test_set(mem->_idx)) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
481 return NULL; // found a loop, give up
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
482 }
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
483 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
484 if (mem == start_mem || mem == alloc_mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
485 done = true; // hit a sentinel, return appropriate 0 value
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
486 } else if (mem->is_Initialize()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
487 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
488 if (mem == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
489 done = true; // Something go wrong.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
490 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
491 const TypePtr* atype = mem->as_Store()->adr_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
492 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
493 done = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
494 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
495 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
496 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
497 assert(atype != NULL, "address type must be oopptr");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
498 assert(C->get_alias_index(atype) == alias_idx &&
223
1dd146f17531 6716441: error in meet with +DoEscapeAnalysis
kvn
parents: 221
diff changeset
499 atype->is_known_instance_field() && atype->offset() == offset &&
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
500 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
501 done = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
502 } else if (mem->is_Phi()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
503 // try to find a phi's unique input
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
504 Node *unique_input = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
505 Node *top = C->top();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
506 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
507 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
508 if (n == NULL || n == top || n == mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
509 continue;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
510 } else if (unique_input == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
511 unique_input = n;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
512 } else if (unique_input != n) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
513 unique_input = top;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
514 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
515 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
516 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
517 if (unique_input != NULL && unique_input != top) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
518 mem = unique_input;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
519 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
520 done = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
521 }
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 assert(false, "unexpected node");
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 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
526 if (mem != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
527 if (mem == start_mem || mem == alloc_mem) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
528 // hit a sentinel, return appropriate 0 value
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
529 return _igvn.zerocon(ft);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
530 } else if (mem->is_Store()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
531 return mem->in(MemNode::ValueIn);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
532 } else if (mem->is_Phi()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
533 // 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
534 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
535 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
536 if (phi != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
537 return phi;
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
538 } else {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
539 // Kill all new Phis
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
540 while(value_phis.is_nonempty()) {
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
541 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
542 _igvn.replace_node(n, C->top());
247
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
543 value_phis.pop();
02a35ad4adf8 6723160: Nightly failure: Error: meet not symmetric
kvn
parents: 235
diff changeset
544 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
545 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
546 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
547 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
548 // Something go wrong.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
549 return NULL;
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
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
552 // Check the possibility of scalar replacement.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
553 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
554 // 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
555 // prevent us from eliminating it.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
556 NOT_PRODUCT( const char* fail_eliminate = NULL; )
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
557 DEBUG_ONLY( Node* disq_node = NULL; )
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
558 bool can_eliminate = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
559
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
560 Node* res = alloc->result_cast();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
561 const TypeOopPtr* res_type = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
562 if (res == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
563 // All users were eliminated.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
564 } else if (!res->is_CheckCastPP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
565 alloc->_is_scalar_replaceable = false; // don't try again
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
566 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
567 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
568 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
569 res_type = _igvn.type(res)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
570 if (res_type == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
571 NOT_PRODUCT(fail_eliminate = "Neither instance or array allocation";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
572 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
573 } else if (res_type->isa_aryptr()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
574 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
575 if (length < 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
576 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
577 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
578 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
579 }
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 if (can_eliminate && res != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
583 for (DUIterator_Fast jmax, j = res->fast_outs(jmax);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
584 j < jmax && can_eliminate; j++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
585 Node* use = res->fast_out(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
586
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
587 if (use->is_AddP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
588 const TypePtr* addp_type = _igvn.type(use)->is_ptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
589 int offset = addp_type->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
590
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
591 if (offset == Type::OffsetTop || offset == Type::OffsetBot) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
592 NOT_PRODUCT(fail_eliminate = "Undefined field referrence";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
593 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
594 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
595 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
596 for (DUIterator_Fast kmax, k = use->fast_outs(kmax);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
597 k < kmax && can_eliminate; k++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
598 Node* n = use->fast_out(k);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
599 if (!n->is_Store() && n->Opcode() != Op_CastP2X) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
600 DEBUG_ONLY(disq_node = n;)
253
b0fe4deeb9fb 6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents: 247
diff changeset
601 if (n->is_Load() || n->is_LoadStore()) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
602 NOT_PRODUCT(fail_eliminate = "Field load";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
603 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
604 NOT_PRODUCT(fail_eliminate = "Not store field referrence";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
605 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
606 can_eliminate = false;
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 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
609 } else if (use->is_SafePoint()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
610 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
611 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
612 // Object is passed as argument.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
613 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
614 NOT_PRODUCT(fail_eliminate = "Object is passed as argument";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
615 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
616 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
617 Node* sfptMem = sfpt->memory();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
618 if (sfptMem == NULL || sfptMem->is_top()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
619 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
620 NOT_PRODUCT(fail_eliminate = "NULL or TOP memory";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
621 can_eliminate = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
622 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
623 safepoints.append_if_missing(sfpt);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
624 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
625 } 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
626 if (use->is_Phi()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
627 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
628 NOT_PRODUCT(fail_eliminate = "Object is return value";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
629 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
630 NOT_PRODUCT(fail_eliminate = "Object is referenced by Phi";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
631 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
632 DEBUG_ONLY(disq_node = use;)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
633 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
634 if (use->Opcode() == Op_Return) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
635 NOT_PRODUCT(fail_eliminate = "Object is return value";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
636 }else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
637 NOT_PRODUCT(fail_eliminate = "Object is referenced by node";)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
638 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
639 DEBUG_ONLY(disq_node = use;)
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 can_eliminate = false;
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 }
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 #ifndef PRODUCT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
647 if (PrintEliminateAllocations) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
648 if (can_eliminate) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
649 tty->print("Scalar ");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
650 if (res == NULL)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
651 alloc->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
652 else
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
653 res->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 tty->print("NotScalar (%s)", fail_eliminate);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
656 if (res == NULL)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
657 alloc->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
658 else
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
659 res->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
660 #ifdef ASSERT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
661 if (disq_node != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
662 tty->print(" >>>> ");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
663 disq_node->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
664 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
665 #endif /*ASSERT*/
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 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
668 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
669 return can_eliminate;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
670 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
671
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
672 // Do scalar replacement.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
673 bool PhaseMacroExpand::scalar_replacement(AllocateNode *alloc, GrowableArray <SafePointNode *>& safepoints) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
674 GrowableArray <SafePointNode *> safepoints_done;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
675
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
676 ciKlass* klass = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
677 ciInstanceKlass* iklass = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
678 int nfields = 0;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
679 int array_base;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
680 int element_size;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
681 BasicType basic_elem_type;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
682 ciType* elem_type;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
683
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
684 Node* res = alloc->result_cast();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
685 const TypeOopPtr* res_type = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
686 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
687 res_type = _igvn.type(res)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
688 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
689
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
690 if (res != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
691 klass = res_type->klass();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
692 if (res_type->isa_instptr()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
693 // 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
694 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
695 iklass = klass->as_instance_klass();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
696 nfields = iklass->nof_nonstatic_fields();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
697 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
698 // 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
699 nfields = alloc->in(AllocateNode::ALength)->find_int_con(-1);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
700 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
701 elem_type = klass->as_array_klass()->element_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
702 basic_elem_type = elem_type->basic_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
703 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
704 element_size = type2aelembytes(basic_elem_type);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
705 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
706 }
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 // Process the safepoint uses
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 while (safepoints.length() > 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
711 SafePointNode* sfpt = safepoints.pop();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
712 Node* mem = sfpt->memory();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
713 uint first_ind = sfpt->req();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
714 SafePointScalarObjectNode* sobj = new (C, 1) SafePointScalarObjectNode(res_type,
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
715 #ifdef ASSERT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
716 alloc,
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
717 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
718 first_ind, nfields);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
719 sobj->init_req(0, sfpt->in(TypeFunc::Control));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
720 transform_later(sobj);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
721
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
722 // 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
723 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
724 intptr_t offset;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
725 ciField* field = NULL;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
726 if (iklass != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
727 field = iklass->nonstatic_field_at(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
728 offset = field->offset();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
729 elem_type = field->type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
730 basic_elem_type = field->layout_type();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
731 } else {
306
af945ba2e739 6741738: TypePtr::add_offset() set incorrect offset when the add overflows
kvn
parents: 253
diff changeset
732 offset = array_base + j * (intptr_t)element_size;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
733 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
734
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
735 const Type *field_type;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
736 // 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
737 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
738 if (!elem_type->is_loaded()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
739 field_type = TypeInstPtr::BOTTOM;
1682
e5dfb3ccb88b 6969569: assert(is_static() && is_constant()) failed: illegal call to constant_value()
kvn
parents: 1621
diff changeset
740 } 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
741 // 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
742 ciObject* con = field->constant_value().as_object();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
743 // 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
744 // 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
745 field_type = TypeOopPtr::make_from_constant(con)->isa_oopptr();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
746 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
747 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
748 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
749 }
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
750 if (UseCompressedOops) {
221
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
751 field_type = field_type->make_narrowoop();
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
752 basic_elem_type = T_NARROWOOP;
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
753 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
754 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
755 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
756 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
757
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
758 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
759
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
760 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
761 if (field_val == NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
762 // we weren't able to find a value for this field,
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
763 // give up on eliminating this allocation
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
764 alloc->_is_scalar_replaceable = false; // don't try again
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
765 // remove any extra entries we added to the safepoint
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
766 uint last = sfpt->req() - 1;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
767 for (int k = 0; k < j; k++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
768 sfpt->del_req(last--);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
769 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
770 // rollback processed safepoints
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
771 while (safepoints_done.length() > 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
772 SafePointNode* sfpt_done = safepoints_done.pop();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
773 // remove any extra entries we added to the safepoint
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
774 last = sfpt_done->req() - 1;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
775 for (int k = 0; k < nfields; k++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
776 sfpt_done->del_req(last--);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
777 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
778 JVMState *jvms = sfpt_done->jvms();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
779 jvms->set_endoff(sfpt_done->req());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
780 // 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
781 // to SafePointScalarObjectNode with the allocated object.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
782 int start = jvms->debug_start();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
783 int end = jvms->debug_end();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
784 for (int i = start; i < end; i++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
785 if (sfpt_done->in(i)->is_SafePointScalarObject()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
786 SafePointScalarObjectNode* scobj = sfpt_done->in(i)->as_SafePointScalarObject();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
787 if (scobj->first_index() == sfpt_done->req() &&
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
788 scobj->n_fields() == (uint)nfields) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
789 assert(scobj->alloc() == alloc, "sanity");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
790 sfpt_done->set_req(i, res);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
791 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
792 }
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 #ifndef PRODUCT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
796 if (PrintEliminateAllocations) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
797 if (field != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
798 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
799 sfpt->_idx);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
800 field->print();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
801 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
802 tty->print(" (alias_idx=%d)", field_idx);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
803 } else { // Array's element
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
804 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
805 sfpt->_idx, j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
806 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
807 tty->print(", which prevents elimination of: ");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
808 if (res == NULL)
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
809 alloc->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
810 else
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
811 res->dump();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
812 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
813 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
814 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
815 }
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
816 if (UseCompressedOops && field_type->isa_narrowoop()) {
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
817 // Enable "DecodeN(EncodeP(Allocate)) --> Allocate" transformation
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
818 // 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
819 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
820 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
821 } else {
1e026f8da827 6710487: More than half of JDI Regression tests hang with COOPs in -Xcomp mode
kvn
parents: 216
diff changeset
822 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
823 }
124
b130b98db9cf 6689060: Escape Analysis does not work with Compressed Oops
kvn
parents: 113
diff changeset
824 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
825 sfpt->add_req(field_val);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
826 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
827 JVMState *jvms = sfpt->jvms();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
828 jvms->set_endoff(sfpt->req());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
829 // 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
830 // to the allocated object with "sobj"
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
831 int start = jvms->debug_start();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
832 int end = jvms->debug_end();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
833 for (int i = start; i < end; i++) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
834 if (sfpt->in(i) == res) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
835 sfpt->set_req(i, sobj);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
836 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
837 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
838 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
839 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
840 return true;
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
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
843 // Process users of eliminated allocation.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
844 void PhaseMacroExpand::process_users_of_allocation(AllocateNode *alloc) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
845 Node* res = alloc->result_cast();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
846 if (res != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
847 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
848 Node *use = res->last_out(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
849 uint oc1 = res->outcnt();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
850
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
851 if (use->is_AddP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
852 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
853 Node *n = use->last_out(k);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
854 uint oc2 = use->outcnt();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
855 if (n->is_Store()) {
1100
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
856 #ifdef ASSERT
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
857 // 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
858 // 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
859 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
860 p < pmax; p++) {
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
861 Node* mb = n->fast_out(p);
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
862 assert(mb->is_Initialize() || !mb->is_MemBar() ||
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
863 mb->req() <= MemBarNode::Precedent ||
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
864 mb->in(MemBarNode::Precedent) != n,
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
865 "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
866 }
f96a1a986f7b 6895383: JCK test throws NPE for method compiled with Escape Analysis
kvn
parents: 1080
diff changeset
867 #endif
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
868 _igvn.replace_node(n, n->in(MemNode::Memory));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
869 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
870 eliminate_card_mark(n);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
871 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
872 k -= (oc2 - use->outcnt());
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 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
875 eliminate_card_mark(use);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
876 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
877 j -= (oc1 - res->outcnt());
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 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
880 _igvn.remove_dead_node(res);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
881 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
882
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 // Process other users of allocation's projections
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 if (_resproj != NULL && _resproj->outcnt() != 0) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
887 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
888 Node *use = _resproj->last_out(j);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
889 uint oc1 = _resproj->outcnt();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
890 if (use->is_Initialize()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
891 // Eliminate Initialize node.
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
892 InitializeNode *init = use->as_Initialize();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
893 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
894 Node *ctrl_proj = init->proj_out(TypeFunc::Control);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
895 if (ctrl_proj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
896 assert(init->in(TypeFunc::Control) == _fallthroughcatchproj, "allocation control projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
897 _igvn.replace_node(ctrl_proj, _fallthroughcatchproj);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
898 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
899 Node *mem_proj = init->proj_out(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
900 if (mem_proj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
901 Node *mem = init->in(TypeFunc::Memory);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
902 #ifdef ASSERT
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
903 if (mem->is_MergeMem()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
904 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
905 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
906 assert(mem == _memproj_fallthrough, "allocation memory projection");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
907 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
908 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
909 _igvn.replace_node(mem_proj, mem);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
910 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
911 } else if (use->is_AddP()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
912 // 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
913 _igvn.replace_node(use, C->top());
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
914 } else {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
915 assert(false, "only Initialize or AddP expected");
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
916 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
917 j -= (oc1 - _resproj->outcnt());
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 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
920 if (_fallthroughcatchproj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
921 _igvn.replace_node(_fallthroughcatchproj, alloc->in(TypeFunc::Control));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
922 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
923 if (_memproj_fallthrough != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
924 _igvn.replace_node(_memproj_fallthrough, alloc->in(TypeFunc::Memory));
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
925 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
926 if (_memproj_catchall != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
927 _igvn.replace_node(_memproj_catchall, C->top());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
928 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
929 if (_ioproj_fallthrough != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
930 _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
931 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
932 if (_ioproj_catchall != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
933 _igvn.replace_node(_ioproj_catchall, C->top());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
934 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
935 if (_catchallcatchproj != NULL) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
936 _igvn.replace_node(_catchallcatchproj, C->top());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
937 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
938 }
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 bool PhaseMacroExpand::eliminate_allocate_node(AllocateNode *alloc) {
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 if (!EliminateAllocations || !alloc->_is_scalar_replaceable) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
943 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
944 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
945
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
946 extract_call_projections(alloc);
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 GrowableArray <SafePointNode *> safepoints;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
949 if (!can_eliminate_allocation(alloc, safepoints)) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
950 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
951 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
952
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
953 if (!scalar_replacement(alloc, safepoints)) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
954 return false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
955 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
956
1080
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
957 CompileLog* log = C->log();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
958 if (log != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
959 Node* klass = alloc->in(AllocateNode::KlassNode);
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
960 const TypeKlassPtr* tklass = _igvn.type(klass)->is_klassptr();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
961 log->head("eliminate_allocation type='%d'",
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
962 log->identify(tklass->klass()));
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
963 JVMState* p = alloc->jvms();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
964 while (p != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
965 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
966 p = p->caller();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
967 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
968 log->tail("eliminate_allocation");
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
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
971 process_users_of_allocation(alloc);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
972
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
973 #ifndef PRODUCT
1080
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
974 if (PrintEliminateAllocations) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
975 if (alloc->is_AllocateArray())
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
976 tty->print_cr("++++ Eliminated: %d AllocateArray", alloc->_idx);
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
977 else
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
978 tty->print_cr("++++ Eliminated: %d Allocate", alloc->_idx);
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
979 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
980 #endif
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
981
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
982 return true;
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
0
a61af66fc99e Initial load
duke
parents:
diff changeset
985
a61af66fc99e Initial load
duke
parents:
diff changeset
986 //---------------------------set_eden_pointers-------------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
987 void PhaseMacroExpand::set_eden_pointers(Node* &eden_top_adr, Node* &eden_end_adr) {
a61af66fc99e Initial load
duke
parents:
diff changeset
988 if (UseTLAB) { // Private allocation: load from TLS
a61af66fc99e Initial load
duke
parents:
diff changeset
989 Node* thread = transform_later(new (C, 1) ThreadLocalNode());
a61af66fc99e Initial load
duke
parents:
diff changeset
990 int tlab_top_offset = in_bytes(JavaThread::tlab_top_offset());
a61af66fc99e Initial load
duke
parents:
diff changeset
991 int tlab_end_offset = in_bytes(JavaThread::tlab_end_offset());
a61af66fc99e Initial load
duke
parents:
diff changeset
992 eden_top_adr = basic_plus_adr(top()/*not oop*/, thread, tlab_top_offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
993 eden_end_adr = basic_plus_adr(top()/*not oop*/, thread, tlab_end_offset);
a61af66fc99e Initial load
duke
parents:
diff changeset
994 } else { // Shared allocation: load from globals
a61af66fc99e Initial load
duke
parents:
diff changeset
995 CollectedHeap* ch = Universe::heap();
a61af66fc99e Initial load
duke
parents:
diff changeset
996 address top_adr = (address)ch->top_addr();
a61af66fc99e Initial load
duke
parents:
diff changeset
997 address end_adr = (address)ch->end_addr();
a61af66fc99e Initial load
duke
parents:
diff changeset
998 eden_top_adr = makecon(TypeRawPtr::make(top_adr));
a61af66fc99e Initial load
duke
parents:
diff changeset
999 eden_end_adr = basic_plus_adr(eden_top_adr, end_adr - top_adr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1000 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1001 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1002
a61af66fc99e Initial load
duke
parents:
diff changeset
1003
a61af66fc99e Initial load
duke
parents:
diff changeset
1004 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
1005 Node* adr = basic_plus_adr(base, offset);
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1006 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
1007 Node* value = LoadNode::make(_igvn, ctl, mem, adr, adr_type, value_type, bt);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1008 transform_later(value);
a61af66fc99e Initial load
duke
parents:
diff changeset
1009 return value;
a61af66fc99e Initial load
duke
parents:
diff changeset
1010 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1011
a61af66fc99e Initial load
duke
parents:
diff changeset
1012
a61af66fc99e Initial load
duke
parents:
diff changeset
1013 Node* PhaseMacroExpand::make_store(Node* ctl, Node* mem, Node* base, int offset, Node* value, BasicType bt) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1014 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
1015 mem = StoreNode::make(_igvn, ctl, mem, adr, NULL, value, bt);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1016 transform_later(mem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1017 return mem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1018 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1019
a61af66fc99e Initial load
duke
parents:
diff changeset
1020 //=============================================================================
a61af66fc99e Initial load
duke
parents:
diff changeset
1021 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1022 // A L L O C A T I O N
a61af66fc99e Initial load
duke
parents:
diff changeset
1023 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1024 // Allocation attempts to be fast in the case of frequent small objects.
a61af66fc99e Initial load
duke
parents:
diff changeset
1025 // It breaks down like this:
a61af66fc99e Initial load
duke
parents:
diff changeset
1026 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1027 // 1) Size in doublewords is computed. This is a constant for objects and
a61af66fc99e Initial load
duke
parents:
diff changeset
1028 // variable for most arrays. Doubleword units are used to avoid size
a61af66fc99e Initial load
duke
parents:
diff changeset
1029 // overflow of huge doubleword arrays. We need doublewords in the end for
a61af66fc99e Initial load
duke
parents:
diff changeset
1030 // rounding.
a61af66fc99e Initial load
duke
parents:
diff changeset
1031 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1032 // 2) Size is checked for being 'too large'. Too-large allocations will go
a61af66fc99e Initial load
duke
parents:
diff changeset
1033 // the slow path into the VM. The slow path can throw any required
a61af66fc99e Initial load
duke
parents:
diff changeset
1034 // exceptions, and does all the special checks for very large arrays. The
a61af66fc99e Initial load
duke
parents:
diff changeset
1035 // size test can constant-fold away for objects. For objects with
a61af66fc99e Initial load
duke
parents:
diff changeset
1036 // finalizers it constant-folds the otherway: you always go slow with
a61af66fc99e Initial load
duke
parents:
diff changeset
1037 // finalizers.
a61af66fc99e Initial load
duke
parents:
diff changeset
1038 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1039 // 3) If NOT using TLABs, this is the contended loop-back point.
a61af66fc99e Initial load
duke
parents:
diff changeset
1040 // Load-Locked the heap top. If using TLABs normal-load the heap top.
a61af66fc99e Initial load
duke
parents:
diff changeset
1041 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1042 // 4) Check that heap top + size*8 < max. If we fail go the slow ` route.
a61af66fc99e Initial load
duke
parents:
diff changeset
1043 // NOTE: "top+size*8" cannot wrap the 4Gig line! Here's why: for largish
a61af66fc99e Initial load
duke
parents:
diff changeset
1044 // "size*8" we always enter the VM, where "largish" is a constant picked small
a61af66fc99e Initial load
duke
parents:
diff changeset
1045 // enough that there's always space between the eden max and 4Gig (old space is
a61af66fc99e Initial load
duke
parents:
diff changeset
1046 // there so it's quite large) and large enough that the cost of entering the VM
a61af66fc99e Initial load
duke
parents:
diff changeset
1047 // is dwarfed by the cost to initialize the space.
a61af66fc99e Initial load
duke
parents:
diff changeset
1048 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1049 // 5) If NOT using TLABs, Store-Conditional the adjusted heap top back
a61af66fc99e Initial load
duke
parents:
diff changeset
1050 // down. If contended, repeat at step 3. If using TLABs normal-store
a61af66fc99e Initial load
duke
parents:
diff changeset
1051 // adjusted heap top back down; there is no contention.
a61af66fc99e Initial load
duke
parents:
diff changeset
1052 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1053 // 6) If !ZeroTLAB then Bulk-clear the object/array. Fill in klass & mark
a61af66fc99e Initial load
duke
parents:
diff changeset
1054 // fields.
a61af66fc99e Initial load
duke
parents:
diff changeset
1055 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1056 // 7) Merge with the slow-path; cast the raw memory pointer to the correct
a61af66fc99e Initial load
duke
parents:
diff changeset
1057 // oop flavor.
a61af66fc99e Initial load
duke
parents:
diff changeset
1058 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1059 //=============================================================================
a61af66fc99e Initial load
duke
parents:
diff changeset
1060 // FastAllocateSizeLimit value is in DOUBLEWORDS.
a61af66fc99e Initial load
duke
parents:
diff changeset
1061 // Allocations bigger than this always go the slow route.
a61af66fc99e Initial load
duke
parents:
diff changeset
1062 // This value must be small enough that allocation attempts that need to
a61af66fc99e Initial load
duke
parents:
diff changeset
1063 // trigger exceptions go the slow route. Also, it must be small enough so
a61af66fc99e Initial load
duke
parents:
diff changeset
1064 // that heap_top + size_in_bytes does not wrap around the 4Gig limit.
a61af66fc99e Initial load
duke
parents:
diff changeset
1065 //=============================================================================j//
a61af66fc99e Initial load
duke
parents:
diff changeset
1066 // %%% Here is an old comment from parseHelper.cpp; is it outdated?
a61af66fc99e Initial load
duke
parents:
diff changeset
1067 // The allocator will coalesce int->oop copies away. See comment in
a61af66fc99e Initial load
duke
parents:
diff changeset
1068 // coalesce.cpp about how this works. It depends critically on the exact
a61af66fc99e Initial load
duke
parents:
diff changeset
1069 // code shape produced here, so if you are changing this code shape
a61af66fc99e Initial load
duke
parents:
diff changeset
1070 // make sure the GC info for the heap-top is correct in and around the
a61af66fc99e Initial load
duke
parents:
diff changeset
1071 // slow-path call.
a61af66fc99e Initial load
duke
parents:
diff changeset
1072 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1073
a61af66fc99e Initial load
duke
parents:
diff changeset
1074 void PhaseMacroExpand::expand_allocate_common(
a61af66fc99e Initial load
duke
parents:
diff changeset
1075 AllocateNode* alloc, // allocation node to be expanded
a61af66fc99e Initial load
duke
parents:
diff changeset
1076 Node* length, // array length for an array allocation
a61af66fc99e Initial load
duke
parents:
diff changeset
1077 const TypeFunc* slow_call_type, // Type of slow call
a61af66fc99e Initial load
duke
parents:
diff changeset
1078 address slow_call_address // Address of slow call
a61af66fc99e Initial load
duke
parents:
diff changeset
1079 )
a61af66fc99e Initial load
duke
parents:
diff changeset
1080 {
a61af66fc99e Initial load
duke
parents:
diff changeset
1081
a61af66fc99e Initial load
duke
parents:
diff changeset
1082 Node* ctrl = alloc->in(TypeFunc::Control);
a61af66fc99e Initial load
duke
parents:
diff changeset
1083 Node* mem = alloc->in(TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1084 Node* i_o = alloc->in(TypeFunc::I_O);
a61af66fc99e Initial load
duke
parents:
diff changeset
1085 Node* size_in_bytes = alloc->in(AllocateNode::AllocSize);
a61af66fc99e Initial load
duke
parents:
diff changeset
1086 Node* klass_node = alloc->in(AllocateNode::KlassNode);
a61af66fc99e Initial load
duke
parents:
diff changeset
1087 Node* initial_slow_test = alloc->in(AllocateNode::InitialTest);
a61af66fc99e Initial load
duke
parents:
diff changeset
1088
a61af66fc99e Initial load
duke
parents:
diff changeset
1089 assert(ctrl != NULL, "must have control");
a61af66fc99e Initial load
duke
parents:
diff changeset
1090 // We need a Region and corresponding Phi's to merge the slow-path and fast-path results.
a61af66fc99e Initial load
duke
parents:
diff changeset
1091 // they will not be used if "always_slow" is set
a61af66fc99e Initial load
duke
parents:
diff changeset
1092 enum { slow_result_path = 1, fast_result_path = 2 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1093 Node *result_region;
a61af66fc99e Initial load
duke
parents:
diff changeset
1094 Node *result_phi_rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1095 Node *result_phi_rawoop;
a61af66fc99e Initial load
duke
parents:
diff changeset
1096 Node *result_phi_i_o;
a61af66fc99e Initial load
duke
parents:
diff changeset
1097
a61af66fc99e Initial load
duke
parents:
diff changeset
1098 // The initial slow comparison is a size check, the comparison
a61af66fc99e Initial load
duke
parents:
diff changeset
1099 // we want to do is a BoolTest::gt
a61af66fc99e Initial load
duke
parents:
diff changeset
1100 bool always_slow = false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1101 int tv = _igvn.find_int_con(initial_slow_test, -1);
a61af66fc99e Initial load
duke
parents:
diff changeset
1102 if (tv >= 0) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1103 always_slow = (tv == 1);
a61af66fc99e Initial load
duke
parents:
diff changeset
1104 initial_slow_test = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1105 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1106 initial_slow_test = BoolNode::make_predicate(initial_slow_test, &_igvn);
a61af66fc99e Initial load
duke
parents:
diff changeset
1107 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1108
780
c96bf21b756f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 708
diff changeset
1109 if (C->env()->dtrace_alloc_probes() ||
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1110 !UseTLAB && (!Universe::heap()->supports_inline_contig_alloc() ||
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1111 (UseConcMarkSweepGC && CMSIncrementalMode))) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1112 // Force slow-path allocation
a61af66fc99e Initial load
duke
parents:
diff changeset
1113 always_slow = true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1114 initial_slow_test = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1115 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1116
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1117
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1118 enum { too_big_or_final_path = 1, need_gc_path = 2 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1119 Node *slow_region = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1120 Node *toobig_false = ctrl;
a61af66fc99e Initial load
duke
parents:
diff changeset
1121
a61af66fc99e Initial load
duke
parents:
diff changeset
1122 assert (initial_slow_test == NULL || !always_slow, "arguments must be consistent");
a61af66fc99e Initial load
duke
parents:
diff changeset
1123 // generate the initial test if necessary
a61af66fc99e Initial load
duke
parents:
diff changeset
1124 if (initial_slow_test != NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1125 slow_region = new (C, 3) RegionNode(3);
a61af66fc99e Initial load
duke
parents:
diff changeset
1126
a61af66fc99e Initial load
duke
parents:
diff changeset
1127 // Now make the initial failure test. Usually a too-big test but
a61af66fc99e Initial load
duke
parents:
diff changeset
1128 // might be a TRUE for finalizers or a fancy class check for
a61af66fc99e Initial load
duke
parents:
diff changeset
1129 // newInstance0.
a61af66fc99e Initial load
duke
parents:
diff changeset
1130 IfNode *toobig_iff = new (C, 2) IfNode(ctrl, initial_slow_test, PROB_MIN, COUNT_UNKNOWN);
a61af66fc99e Initial load
duke
parents:
diff changeset
1131 transform_later(toobig_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1132 // Plug the failing-too-big test into the slow-path region
a61af66fc99e Initial load
duke
parents:
diff changeset
1133 Node *toobig_true = new (C, 1) IfTrueNode( toobig_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1134 transform_later(toobig_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1135 slow_region ->init_req( too_big_or_final_path, toobig_true );
a61af66fc99e Initial load
duke
parents:
diff changeset
1136 toobig_false = new (C, 1) IfFalseNode( toobig_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1137 transform_later(toobig_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1138 } else { // No initial test, just fall into next case
a61af66fc99e Initial load
duke
parents:
diff changeset
1139 toobig_false = ctrl;
a61af66fc99e Initial load
duke
parents:
diff changeset
1140 debug_only(slow_region = NodeSentinel);
a61af66fc99e Initial load
duke
parents:
diff changeset
1141 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1142
a61af66fc99e Initial load
duke
parents:
diff changeset
1143 Node *slow_mem = mem; // save the current memory state for slow path
a61af66fc99e Initial load
duke
parents:
diff changeset
1144 // generate the fast allocation code unless we know that the initial test will always go slow
a61af66fc99e Initial load
duke
parents:
diff changeset
1145 if (!always_slow) {
565
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1146 // Fast path modifies only raw memory.
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1147 if (mem->is_MergeMem()) {
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1148 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
1149 }
7fe62bb75bf4 6799693: Server compiler leads to data corruption when expression throws an Exception
kvn
parents: 490
diff changeset
1150
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1151 Node* eden_top_adr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1152 Node* eden_end_adr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1153
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1154 set_eden_pointers(eden_top_adr, eden_end_adr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1155
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1156 // Load Eden::end. Loop invariant and hoisted.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1157 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1158 // 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
1159 // 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
1160 // a safepoint. These are not oops, so they cannot be include in the oop
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1161 // map, but the can be changed by a GC. The proper way to fix this would
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1162 // 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
1163 // 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
1164 // prevent a degradation of the optimization.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents: 124
diff changeset
1165 // 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
1166 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
1167
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1168 // allocate the Region and Phi nodes for the result
a61af66fc99e Initial load
duke
parents:
diff changeset
1169 result_region = new (C, 3) RegionNode(3);
a61af66fc99e Initial load
duke
parents:
diff changeset
1170 result_phi_rawmem = new (C, 3) PhiNode( result_region, Type::MEMORY, TypeRawPtr::BOTTOM );
a61af66fc99e Initial load
duke
parents:
diff changeset
1171 result_phi_rawoop = new (C, 3) PhiNode( result_region, TypeRawPtr::BOTTOM );
a61af66fc99e Initial load
duke
parents:
diff changeset
1172 result_phi_i_o = new (C, 3) PhiNode( result_region, Type::ABIO ); // I/O is used for Prefetch
a61af66fc99e Initial load
duke
parents:
diff changeset
1173
a61af66fc99e Initial load
duke
parents:
diff changeset
1174 // We need a Region for the loop-back contended case.
a61af66fc99e Initial load
duke
parents:
diff changeset
1175 enum { fall_in_path = 1, contended_loopback_path = 2 };
a61af66fc99e Initial load
duke
parents:
diff changeset
1176 Node *contended_region;
a61af66fc99e Initial load
duke
parents:
diff changeset
1177 Node *contended_phi_rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1178 if( UseTLAB ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1179 contended_region = toobig_false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1180 contended_phi_rawmem = mem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1181 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1182 contended_region = new (C, 3) RegionNode(3);
a61af66fc99e Initial load
duke
parents:
diff changeset
1183 contended_phi_rawmem = new (C, 3) PhiNode( contended_region, Type::MEMORY, TypeRawPtr::BOTTOM);
a61af66fc99e Initial load
duke
parents:
diff changeset
1184 // Now handle the passing-too-big test. We fall into the contended
a61af66fc99e Initial load
duke
parents:
diff changeset
1185 // loop-back merge point.
a61af66fc99e Initial load
duke
parents:
diff changeset
1186 contended_region ->init_req( fall_in_path, toobig_false );
a61af66fc99e Initial load
duke
parents:
diff changeset
1187 contended_phi_rawmem->init_req( fall_in_path, mem );
a61af66fc99e Initial load
duke
parents:
diff changeset
1188 transform_later(contended_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1189 transform_later(contended_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1190 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1191
a61af66fc99e Initial load
duke
parents:
diff changeset
1192 // Load(-locked) the heap top.
a61af66fc99e Initial load
duke
parents:
diff changeset
1193 // See note above concerning the control input when using a TLAB
a61af66fc99e Initial load
duke
parents:
diff changeset
1194 Node *old_eden_top = UseTLAB
a61af66fc99e Initial load
duke
parents:
diff changeset
1195 ? new (C, 3) LoadPNode ( ctrl, contended_phi_rawmem, eden_top_adr, TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM )
a61af66fc99e Initial load
duke
parents:
diff changeset
1196 : new (C, 3) LoadPLockedNode( contended_region, contended_phi_rawmem, eden_top_adr );
a61af66fc99e Initial load
duke
parents:
diff changeset
1197
a61af66fc99e Initial load
duke
parents:
diff changeset
1198 transform_later(old_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1199 // Add to heap top to get a new heap top
a61af66fc99e Initial load
duke
parents:
diff changeset
1200 Node *new_eden_top = new (C, 4) AddPNode( top(), old_eden_top, size_in_bytes );
a61af66fc99e Initial load
duke
parents:
diff changeset
1201 transform_later(new_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1202 // Check for needing a GC; compare against heap end
a61af66fc99e Initial load
duke
parents:
diff changeset
1203 Node *needgc_cmp = new (C, 3) CmpPNode( new_eden_top, eden_end );
a61af66fc99e Initial load
duke
parents:
diff changeset
1204 transform_later(needgc_cmp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1205 Node *needgc_bol = new (C, 2) BoolNode( needgc_cmp, BoolTest::ge );
a61af66fc99e Initial load
duke
parents:
diff changeset
1206 transform_later(needgc_bol);
a61af66fc99e Initial load
duke
parents:
diff changeset
1207 IfNode *needgc_iff = new (C, 2) IfNode(contended_region, needgc_bol, PROB_UNLIKELY_MAG(4), COUNT_UNKNOWN );
a61af66fc99e Initial load
duke
parents:
diff changeset
1208 transform_later(needgc_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1209
a61af66fc99e Initial load
duke
parents:
diff changeset
1210 // Plug the failing-heap-space-need-gc test into the slow-path region
a61af66fc99e Initial load
duke
parents:
diff changeset
1211 Node *needgc_true = new (C, 1) IfTrueNode( needgc_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1212 transform_later(needgc_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1213 if( initial_slow_test ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1214 slow_region ->init_req( need_gc_path, needgc_true );
a61af66fc99e Initial load
duke
parents:
diff changeset
1215 // This completes all paths into the slow merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1216 transform_later(slow_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1217 } else { // No initial slow path needed!
a61af66fc99e Initial load
duke
parents:
diff changeset
1218 // Just fall from the need-GC path straight into the VM call.
a61af66fc99e Initial load
duke
parents:
diff changeset
1219 slow_region = needgc_true;
a61af66fc99e Initial load
duke
parents:
diff changeset
1220 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1221 // No need for a GC. Setup for the Store-Conditional
a61af66fc99e Initial load
duke
parents:
diff changeset
1222 Node *needgc_false = new (C, 1) IfFalseNode( needgc_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1223 transform_later(needgc_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1224
a61af66fc99e Initial load
duke
parents:
diff changeset
1225 // Grab regular I/O before optional prefetch may change it.
a61af66fc99e Initial load
duke
parents:
diff changeset
1226 // Slow-path does no I/O so just set it to the original I/O.
a61af66fc99e Initial load
duke
parents:
diff changeset
1227 result_phi_i_o->init_req( slow_result_path, i_o );
a61af66fc99e Initial load
duke
parents:
diff changeset
1228
a61af66fc99e Initial load
duke
parents:
diff changeset
1229 i_o = prefetch_allocation(i_o, needgc_false, contended_phi_rawmem,
a61af66fc99e Initial load
duke
parents:
diff changeset
1230 old_eden_top, new_eden_top, length);
a61af66fc99e Initial load
duke
parents:
diff changeset
1231
a61af66fc99e Initial load
duke
parents:
diff changeset
1232 // Store (-conditional) the modified eden top back down.
a61af66fc99e Initial load
duke
parents:
diff changeset
1233 // StorePConditional produces flags for a test PLUS a modified raw
a61af66fc99e Initial load
duke
parents:
diff changeset
1234 // memory state.
a61af66fc99e Initial load
duke
parents:
diff changeset
1235 Node *store_eden_top;
a61af66fc99e Initial load
duke
parents:
diff changeset
1236 Node *fast_oop_ctrl;
a61af66fc99e Initial load
duke
parents:
diff changeset
1237 if( UseTLAB ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1238 store_eden_top = new (C, 4) StorePNode( needgc_false, contended_phi_rawmem, eden_top_adr, TypeRawPtr::BOTTOM, new_eden_top );
a61af66fc99e Initial load
duke
parents:
diff changeset
1239 transform_later(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1240 fast_oop_ctrl = needgc_false; // No contention, so this is the fast path
a61af66fc99e Initial load
duke
parents:
diff changeset
1241 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1242 store_eden_top = new (C, 5) StorePConditionalNode( needgc_false, contended_phi_rawmem, eden_top_adr, new_eden_top, old_eden_top );
a61af66fc99e Initial load
duke
parents:
diff changeset
1243 transform_later(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1244 Node *contention_check = new (C, 2) BoolNode( store_eden_top, BoolTest::ne );
a61af66fc99e Initial load
duke
parents:
diff changeset
1245 transform_later(contention_check);
a61af66fc99e Initial load
duke
parents:
diff changeset
1246 store_eden_top = new (C, 1) SCMemProjNode(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1247 transform_later(store_eden_top);
a61af66fc99e Initial load
duke
parents:
diff changeset
1248
a61af66fc99e Initial load
duke
parents:
diff changeset
1249 // If not using TLABs, check to see if there was contention.
a61af66fc99e Initial load
duke
parents:
diff changeset
1250 IfNode *contention_iff = new (C, 2) IfNode ( needgc_false, contention_check, PROB_MIN, COUNT_UNKNOWN );
a61af66fc99e Initial load
duke
parents:
diff changeset
1251 transform_later(contention_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1252 Node *contention_true = new (C, 1) IfTrueNode( contention_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1253 transform_later(contention_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1254 // If contention, loopback and try again.
a61af66fc99e Initial load
duke
parents:
diff changeset
1255 contended_region->init_req( contended_loopback_path, contention_true );
a61af66fc99e Initial load
duke
parents:
diff changeset
1256 contended_phi_rawmem->init_req( contended_loopback_path, store_eden_top );
a61af66fc99e Initial load
duke
parents:
diff changeset
1257
a61af66fc99e Initial load
duke
parents:
diff changeset
1258 // Fast-path succeeded with no contention!
a61af66fc99e Initial load
duke
parents:
diff changeset
1259 Node *contention_false = new (C, 1) IfFalseNode( contention_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1260 transform_later(contention_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1261 fast_oop_ctrl = contention_false;
a61af66fc99e Initial load
duke
parents:
diff changeset
1262 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1263
a61af66fc99e Initial load
duke
parents:
diff changeset
1264 // Rename successful fast-path variables to make meaning more obvious
a61af66fc99e Initial load
duke
parents:
diff changeset
1265 Node* fast_oop = old_eden_top;
a61af66fc99e Initial load
duke
parents:
diff changeset
1266 Node* fast_oop_rawmem = store_eden_top;
a61af66fc99e Initial load
duke
parents:
diff changeset
1267 fast_oop_rawmem = initialize_object(alloc,
a61af66fc99e Initial load
duke
parents:
diff changeset
1268 fast_oop_ctrl, fast_oop_rawmem, fast_oop,
a61af66fc99e Initial load
duke
parents:
diff changeset
1269 klass_node, length, size_in_bytes);
a61af66fc99e Initial load
duke
parents:
diff changeset
1270
780
c96bf21b756f 6788527: Server vm intermittently fails with assertion "live value must not be garbage" with fastdebug bits
kvn
parents: 708
diff changeset
1271 if (C->env()->dtrace_extended_probes()) {
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1272 // Slow-path call
a61af66fc99e Initial load
duke
parents:
diff changeset
1273 int size = TypeFunc::Parms + 2;
a61af66fc99e Initial load
duke
parents:
diff changeset
1274 CallLeafNode *call = new (C, size) CallLeafNode(OptoRuntime::dtrace_object_alloc_Type(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1275 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_object_alloc_base),
a61af66fc99e Initial load
duke
parents:
diff changeset
1276 "dtrace_object_alloc",
a61af66fc99e Initial load
duke
parents:
diff changeset
1277 TypeRawPtr::BOTTOM);
a61af66fc99e Initial load
duke
parents:
diff changeset
1278
a61af66fc99e Initial load
duke
parents:
diff changeset
1279 // Get base of thread-local storage area
a61af66fc99e Initial load
duke
parents:
diff changeset
1280 Node* thread = new (C, 1) ThreadLocalNode();
a61af66fc99e Initial load
duke
parents:
diff changeset
1281 transform_later(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1282
a61af66fc99e Initial load
duke
parents:
diff changeset
1283 call->init_req(TypeFunc::Parms+0, thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1284 call->init_req(TypeFunc::Parms+1, fast_oop);
a61af66fc99e Initial load
duke
parents:
diff changeset
1285 call->init_req( TypeFunc::Control, fast_oop_ctrl );
a61af66fc99e Initial load
duke
parents:
diff changeset
1286 call->init_req( TypeFunc::I_O , top() ) ; // does no i/o
a61af66fc99e Initial load
duke
parents:
diff changeset
1287 call->init_req( TypeFunc::Memory , fast_oop_rawmem );
a61af66fc99e Initial load
duke
parents:
diff changeset
1288 call->init_req( TypeFunc::ReturnAdr, alloc->in(TypeFunc::ReturnAdr) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1289 call->init_req( TypeFunc::FramePtr, alloc->in(TypeFunc::FramePtr) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1290 transform_later(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1291 fast_oop_ctrl = new (C, 1) ProjNode(call,TypeFunc::Control);
a61af66fc99e Initial load
duke
parents:
diff changeset
1292 transform_later(fast_oop_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
1293 fast_oop_rawmem = new (C, 1) ProjNode(call,TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1294 transform_later(fast_oop_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1295 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1296
a61af66fc99e Initial load
duke
parents:
diff changeset
1297 // Plug in the successful fast-path into the result merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1298 result_region ->init_req( fast_result_path, fast_oop_ctrl );
a61af66fc99e Initial load
duke
parents:
diff changeset
1299 result_phi_rawoop->init_req( fast_result_path, fast_oop );
a61af66fc99e Initial load
duke
parents:
diff changeset
1300 result_phi_i_o ->init_req( fast_result_path, i_o );
a61af66fc99e Initial load
duke
parents:
diff changeset
1301 result_phi_rawmem->init_req( fast_result_path, fast_oop_rawmem );
a61af66fc99e Initial load
duke
parents:
diff changeset
1302 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1303 slow_region = ctrl;
a61af66fc99e Initial load
duke
parents:
diff changeset
1304 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1305
a61af66fc99e Initial load
duke
parents:
diff changeset
1306 // Generate slow-path call
a61af66fc99e Initial load
duke
parents:
diff changeset
1307 CallNode *call = new (C, slow_call_type->domain()->cnt())
a61af66fc99e Initial load
duke
parents:
diff changeset
1308 CallStaticJavaNode(slow_call_type, slow_call_address,
a61af66fc99e Initial load
duke
parents:
diff changeset
1309 OptoRuntime::stub_name(slow_call_address),
a61af66fc99e Initial load
duke
parents:
diff changeset
1310 alloc->jvms()->bci(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1311 TypePtr::BOTTOM);
a61af66fc99e Initial load
duke
parents:
diff changeset
1312 call->init_req( TypeFunc::Control, slow_region );
a61af66fc99e Initial load
duke
parents:
diff changeset
1313 call->init_req( TypeFunc::I_O , top() ) ; // does no i/o
a61af66fc99e Initial load
duke
parents:
diff changeset
1314 call->init_req( TypeFunc::Memory , slow_mem ); // may gc ptrs
a61af66fc99e Initial load
duke
parents:
diff changeset
1315 call->init_req( TypeFunc::ReturnAdr, alloc->in(TypeFunc::ReturnAdr) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1316 call->init_req( TypeFunc::FramePtr, alloc->in(TypeFunc::FramePtr) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1317
a61af66fc99e Initial load
duke
parents:
diff changeset
1318 call->init_req(TypeFunc::Parms+0, klass_node);
a61af66fc99e Initial load
duke
parents:
diff changeset
1319 if (length != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1320 call->init_req(TypeFunc::Parms+1, length);
a61af66fc99e Initial load
duke
parents:
diff changeset
1321 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1322
a61af66fc99e Initial load
duke
parents:
diff changeset
1323 // Copy debug information and adjust JVMState information, then replace
a61af66fc99e Initial load
duke
parents:
diff changeset
1324 // allocate node with the call
a61af66fc99e Initial load
duke
parents:
diff changeset
1325 copy_call_debug_info((CallNode *) alloc, call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1326 if (!always_slow) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1327 call->set_cnt(PROB_UNLIKELY_MAG(4)); // Same effect as RC_UNCOMMON.
a61af66fc99e Initial load
duke
parents:
diff changeset
1328 }
1621
6027dddc26c6 6677629: PhaseIterGVN::subsume_node() should call hash_delete() and add_users_to_worklist()
kvn
parents: 1609
diff changeset
1329 _igvn.replace_node(alloc, call);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1330 transform_later(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1331
a61af66fc99e Initial load
duke
parents:
diff changeset
1332 // Identify the output projections from the allocate node and
a61af66fc99e Initial load
duke
parents:
diff changeset
1333 // adjust any references to them.
a61af66fc99e Initial load
duke
parents:
diff changeset
1334 // The control and io projections look like:
a61af66fc99e Initial load
duke
parents:
diff changeset
1335 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1336 // v---Proj(ctrl) <-----+ v---CatchProj(ctrl)
a61af66fc99e Initial load
duke
parents:
diff changeset
1337 // Allocate Catch
a61af66fc99e Initial load
duke
parents:
diff changeset
1338 // ^---Proj(io) <-------+ ^---CatchProj(io)
a61af66fc99e Initial load
duke
parents:
diff changeset
1339 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1340 // We are interested in the CatchProj nodes.
a61af66fc99e Initial load
duke
parents:
diff changeset
1341 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1342 extract_call_projections(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
1343
a61af66fc99e Initial load
duke
parents:
diff changeset
1344 // An allocate node has separate memory projections for the uses on the control and i_o paths
a61af66fc99e Initial load
duke
parents:
diff changeset
1345 // Replace uses of the control memory projection with result_phi_rawmem (unless we are only generating a slow call)
a61af66fc99e Initial load
duke
parents:
diff changeset
1346 if (!always_slow && _memproj_fallthrough != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1347 for (DUIterator_Fast imax, i = _memproj_fallthrough->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1348 Node *use = _memproj_fallthrough->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1349 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1350 imax -= replace_input(use, _memproj_fallthrough, result_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1351 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1352 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1353 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1354 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1355 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1356 // Now change uses of _memproj_catchall to use _memproj_fallthrough and delete _memproj_catchall so
a61af66fc99e Initial load
duke
parents:
diff changeset
1357 // we end up with a call that has only 1 memory projection
a61af66fc99e Initial load
duke
parents:
diff changeset
1358 if (_memproj_catchall != NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1359 if (_memproj_fallthrough == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1360 _memproj_fallthrough = new (C, 1) ProjNode(call, TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1361 transform_later(_memproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1362 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1363 for (DUIterator_Fast imax, i = _memproj_catchall->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1364 Node *use = _memproj_catchall->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1365 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1366 imax -= replace_input(use, _memproj_catchall, _memproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1367 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1368 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1369 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1370 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1371 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1372
a61af66fc99e Initial load
duke
parents:
diff changeset
1373 // An allocate node has separate i_o projections for the uses on the control and i_o paths
a61af66fc99e Initial load
duke
parents:
diff changeset
1374 // Replace uses of the control i_o projection with result_phi_i_o (unless we are only generating a slow call)
a61af66fc99e Initial load
duke
parents:
diff changeset
1375 if (_ioproj_fallthrough == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1376 _ioproj_fallthrough = new (C, 1) ProjNode(call, TypeFunc::I_O);
a61af66fc99e Initial load
duke
parents:
diff changeset
1377 transform_later(_ioproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1378 } else if (!always_slow) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1379 for (DUIterator_Fast imax, i = _ioproj_fallthrough->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1380 Node *use = _ioproj_fallthrough->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1381
a61af66fc99e Initial load
duke
parents:
diff changeset
1382 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1383 imax -= replace_input(use, _ioproj_fallthrough, result_phi_i_o);
a61af66fc99e Initial load
duke
parents:
diff changeset
1384 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1385 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1386 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1387 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1388 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1389 // Now change uses of _ioproj_catchall to use _ioproj_fallthrough and delete _ioproj_catchall so
a61af66fc99e Initial load
duke
parents:
diff changeset
1390 // we end up with a call that has only 1 control projection
a61af66fc99e Initial load
duke
parents:
diff changeset
1391 if (_ioproj_catchall != NULL ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1392 for (DUIterator_Fast imax, i = _ioproj_catchall->fast_outs(imax); i < imax; i++) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1393 Node *use = _ioproj_catchall->fast_out(i);
a61af66fc99e Initial load
duke
parents:
diff changeset
1394 _igvn.hash_delete(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1395 imax -= replace_input(use, _ioproj_catchall, _ioproj_fallthrough);
a61af66fc99e Initial load
duke
parents:
diff changeset
1396 _igvn._worklist.push(use);
a61af66fc99e Initial load
duke
parents:
diff changeset
1397 // back up iterator
a61af66fc99e Initial load
duke
parents:
diff changeset
1398 --i;
a61af66fc99e Initial load
duke
parents:
diff changeset
1399 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1400 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1401
a61af66fc99e Initial load
duke
parents:
diff changeset
1402 // if we generated only a slow call, we are done
a61af66fc99e Initial load
duke
parents:
diff changeset
1403 if (always_slow)
a61af66fc99e Initial load
duke
parents:
diff changeset
1404 return;
a61af66fc99e Initial load
duke
parents:
diff changeset
1405
a61af66fc99e Initial load
duke
parents:
diff changeset
1406
a61af66fc99e Initial load
duke
parents:
diff changeset
1407 if (_fallthroughcatchproj != NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1408 ctrl = _fallthroughcatchproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
1409 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
1410 _igvn.replace_node(_fallthroughcatchproj, result_region);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1411 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1412 ctrl = top();
a61af66fc99e Initial load
duke
parents:
diff changeset
1413 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1414 Node *slow_result;
a61af66fc99e Initial load
duke
parents:
diff changeset
1415 if (_resproj == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1416 // no uses of the allocation result
a61af66fc99e Initial load
duke
parents:
diff changeset
1417 slow_result = top();
a61af66fc99e Initial load
duke
parents:
diff changeset
1418 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1419 slow_result = _resproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
1420 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
1421 _igvn.replace_node(_resproj, result_phi_rawoop);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1422 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1423
a61af66fc99e Initial load
duke
parents:
diff changeset
1424 // Plug slow-path into result merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1425 result_region ->init_req( slow_result_path, ctrl );
a61af66fc99e Initial load
duke
parents:
diff changeset
1426 result_phi_rawoop->init_req( slow_result_path, slow_result);
a61af66fc99e Initial load
duke
parents:
diff changeset
1427 result_phi_rawmem->init_req( slow_result_path, _memproj_fallthrough );
a61af66fc99e Initial load
duke
parents:
diff changeset
1428 transform_later(result_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1429 transform_later(result_phi_rawoop);
a61af66fc99e Initial load
duke
parents:
diff changeset
1430 transform_later(result_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1431 transform_later(result_phi_i_o);
a61af66fc99e Initial load
duke
parents:
diff changeset
1432 // This completes all paths into the result merge point
a61af66fc99e Initial load
duke
parents:
diff changeset
1433 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1434
a61af66fc99e Initial load
duke
parents:
diff changeset
1435
a61af66fc99e Initial load
duke
parents:
diff changeset
1436 // Helper for PhaseMacroExpand::expand_allocate_common.
a61af66fc99e Initial load
duke
parents:
diff changeset
1437 // Initializes the newly-allocated storage.
a61af66fc99e Initial load
duke
parents:
diff changeset
1438 Node*
a61af66fc99e Initial load
duke
parents:
diff changeset
1439 PhaseMacroExpand::initialize_object(AllocateNode* alloc,
a61af66fc99e Initial load
duke
parents:
diff changeset
1440 Node* control, Node* rawmem, Node* object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1441 Node* klass_node, Node* length,
a61af66fc99e Initial load
duke
parents:
diff changeset
1442 Node* size_in_bytes) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1443 InitializeNode* init = alloc->initialization();
a61af66fc99e Initial load
duke
parents:
diff changeset
1444 // Store the klass & mark bits
a61af66fc99e Initial load
duke
parents:
diff changeset
1445 Node* mark_node = NULL;
a61af66fc99e Initial load
duke
parents:
diff changeset
1446 // For now only enable fast locking for non-array types
a61af66fc99e Initial load
duke
parents:
diff changeset
1447 if (UseBiasedLocking && (length == NULL)) {
1609
4311f23817fd 6959430: Make sure raw loads have control edge
kvn
parents: 1552
diff changeset
1448 mark_node = make_load(control, rawmem, klass_node, Klass::prototype_header_offset_in_bytes() + sizeof(oopDesc), TypeRawPtr::BOTTOM, T_ADDRESS);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1449 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1450 mark_node = makecon(TypeRawPtr::make((address)markOopDesc::prototype()));
a61af66fc99e Initial load
duke
parents:
diff changeset
1451 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1452 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
1453
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1454 rawmem = make_store(control, rawmem, object, oopDesc::klass_offset_in_bytes(), klass_node, T_OBJECT);
a61af66fc99e Initial load
duke
parents:
diff changeset
1455 int header_size = alloc->minimum_header_size(); // conservatively small
a61af66fc99e Initial load
duke
parents:
diff changeset
1456
a61af66fc99e Initial load
duke
parents:
diff changeset
1457 // Array length
a61af66fc99e Initial load
duke
parents:
diff changeset
1458 if (length != NULL) { // Arrays need length field
a61af66fc99e Initial load
duke
parents:
diff changeset
1459 rawmem = make_store(control, rawmem, object, arrayOopDesc::length_offset_in_bytes(), length, T_INT);
a61af66fc99e Initial load
duke
parents:
diff changeset
1460 // conservatively small header size:
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
1461 header_size = arrayOopDesc::base_offset_in_bytes(T_BYTE);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1462 ciKlass* k = _igvn.type(klass_node)->is_klassptr()->klass();
a61af66fc99e Initial load
duke
parents:
diff changeset
1463 if (k->is_array_klass()) // we know the exact header size in most cases:
a61af66fc99e Initial load
duke
parents:
diff changeset
1464 header_size = Klass::layout_helper_header_size(k->layout_helper());
a61af66fc99e Initial load
duke
parents:
diff changeset
1465 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1466
a61af66fc99e Initial load
duke
parents:
diff changeset
1467 // Clear the object body, if necessary.
a61af66fc99e Initial load
duke
parents:
diff changeset
1468 if (init == NULL) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1469 // The init has somehow disappeared; be cautious and clear everything.
a61af66fc99e Initial load
duke
parents:
diff changeset
1470 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1471 // This can happen if a node is allocated but an uncommon trap occurs
a61af66fc99e Initial load
duke
parents:
diff changeset
1472 // immediately. In this case, the Initialize gets associated with the
a61af66fc99e Initial load
duke
parents:
diff changeset
1473 // trap, and may be placed in a different (outer) loop, if the Allocate
a61af66fc99e Initial load
duke
parents:
diff changeset
1474 // is in a loop. If (this is rare) the inner loop gets unrolled, then
a61af66fc99e Initial load
duke
parents:
diff changeset
1475 // there can be two Allocates to one Initialize. The answer in all these
a61af66fc99e Initial load
duke
parents:
diff changeset
1476 // edge cases is safety first. It is always safe to clear immediately
a61af66fc99e Initial load
duke
parents:
diff changeset
1477 // within an Allocate, and then (maybe or maybe not) clear some more later.
a61af66fc99e Initial load
duke
parents:
diff changeset
1478 if (!ZeroTLAB)
a61af66fc99e Initial load
duke
parents:
diff changeset
1479 rawmem = ClearArrayNode::clear_memory(control, rawmem, object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1480 header_size, size_in_bytes,
a61af66fc99e Initial load
duke
parents:
diff changeset
1481 &_igvn);
a61af66fc99e Initial load
duke
parents:
diff changeset
1482 } else {
a61af66fc99e Initial load
duke
parents:
diff changeset
1483 if (!init->is_complete()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1484 // Try to win by zeroing only what the init does not store.
a61af66fc99e Initial load
duke
parents:
diff changeset
1485 // We can also try to do some peephole optimizations,
a61af66fc99e Initial load
duke
parents:
diff changeset
1486 // such as combining some adjacent subword stores.
a61af66fc99e Initial load
duke
parents:
diff changeset
1487 rawmem = init->complete_stores(control, rawmem, object,
a61af66fc99e Initial load
duke
parents:
diff changeset
1488 header_size, size_in_bytes, &_igvn);
a61af66fc99e Initial load
duke
parents:
diff changeset
1489 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1490 // We have no more use for this link, since the AllocateNode goes away:
a61af66fc99e Initial load
duke
parents:
diff changeset
1491 init->set_req(InitializeNode::RawAddress, top());
a61af66fc99e Initial load
duke
parents:
diff changeset
1492 // (If we keep the link, it just confuses the register allocator,
a61af66fc99e Initial load
duke
parents:
diff changeset
1493 // who thinks he sees a real use of the address by the membar.)
a61af66fc99e Initial load
duke
parents:
diff changeset
1494 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1495
a61af66fc99e Initial load
duke
parents:
diff changeset
1496 return rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1497 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1498
a61af66fc99e Initial load
duke
parents:
diff changeset
1499 // Generate prefetch instructions for next allocations.
a61af66fc99e Initial load
duke
parents:
diff changeset
1500 Node* PhaseMacroExpand::prefetch_allocation(Node* i_o, Node*& needgc_false,
a61af66fc99e Initial load
duke
parents:
diff changeset
1501 Node*& contended_phi_rawmem,
a61af66fc99e Initial load
duke
parents:
diff changeset
1502 Node* old_eden_top, Node* new_eden_top,
a61af66fc99e Initial load
duke
parents:
diff changeset
1503 Node* length) {
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1504 enum { fall_in_path = 1, pf_path = 2 };
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1505 if( UseTLAB && AllocatePrefetchStyle == 2 ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1506 // Generate prefetch allocation with watermark check.
a61af66fc99e Initial load
duke
parents:
diff changeset
1507 // As an allocation hits the watermark, we will prefetch starting
a61af66fc99e Initial load
duke
parents:
diff changeset
1508 // at a "distance" away from watermark.
a61af66fc99e Initial load
duke
parents:
diff changeset
1509
a61af66fc99e Initial load
duke
parents:
diff changeset
1510 Node *pf_region = new (C, 3) RegionNode(3);
a61af66fc99e Initial load
duke
parents:
diff changeset
1511 Node *pf_phi_rawmem = new (C, 3) PhiNode( pf_region, Type::MEMORY,
a61af66fc99e Initial load
duke
parents:
diff changeset
1512 TypeRawPtr::BOTTOM );
a61af66fc99e Initial load
duke
parents:
diff changeset
1513 // I/O is used for Prefetch
a61af66fc99e Initial load
duke
parents:
diff changeset
1514 Node *pf_phi_abio = new (C, 3) PhiNode( pf_region, Type::ABIO );
a61af66fc99e Initial load
duke
parents:
diff changeset
1515
a61af66fc99e Initial load
duke
parents:
diff changeset
1516 Node *thread = new (C, 1) ThreadLocalNode();
a61af66fc99e Initial load
duke
parents:
diff changeset
1517 transform_later(thread);
a61af66fc99e Initial load
duke
parents:
diff changeset
1518
a61af66fc99e Initial load
duke
parents:
diff changeset
1519 Node *eden_pf_adr = new (C, 4) AddPNode( top()/*not oop*/, thread,
a61af66fc99e Initial load
duke
parents:
diff changeset
1520 _igvn.MakeConX(in_bytes(JavaThread::tlab_pf_top_offset())) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1521 transform_later(eden_pf_adr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1522
a61af66fc99e Initial load
duke
parents:
diff changeset
1523 Node *old_pf_wm = new (C, 3) LoadPNode( needgc_false,
a61af66fc99e Initial load
duke
parents:
diff changeset
1524 contended_phi_rawmem, eden_pf_adr,
a61af66fc99e Initial load
duke
parents:
diff changeset
1525 TypeRawPtr::BOTTOM, TypeRawPtr::BOTTOM );
a61af66fc99e Initial load
duke
parents:
diff changeset
1526 transform_later(old_pf_wm);
a61af66fc99e Initial load
duke
parents:
diff changeset
1527
a61af66fc99e Initial load
duke
parents:
diff changeset
1528 // check against new_eden_top
a61af66fc99e Initial load
duke
parents:
diff changeset
1529 Node *need_pf_cmp = new (C, 3) CmpPNode( new_eden_top, old_pf_wm );
a61af66fc99e Initial load
duke
parents:
diff changeset
1530 transform_later(need_pf_cmp);
a61af66fc99e Initial load
duke
parents:
diff changeset
1531 Node *need_pf_bol = new (C, 2) BoolNode( need_pf_cmp, BoolTest::ge );
a61af66fc99e Initial load
duke
parents:
diff changeset
1532 transform_later(need_pf_bol);
a61af66fc99e Initial load
duke
parents:
diff changeset
1533 IfNode *need_pf_iff = new (C, 2) IfNode( needgc_false, need_pf_bol,
a61af66fc99e Initial load
duke
parents:
diff changeset
1534 PROB_UNLIKELY_MAG(4), COUNT_UNKNOWN );
a61af66fc99e Initial load
duke
parents:
diff changeset
1535 transform_later(need_pf_iff);
a61af66fc99e Initial load
duke
parents:
diff changeset
1536
a61af66fc99e Initial load
duke
parents:
diff changeset
1537 // true node, add prefetchdistance
a61af66fc99e Initial load
duke
parents:
diff changeset
1538 Node *need_pf_true = new (C, 1) IfTrueNode( need_pf_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1539 transform_later(need_pf_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1540
a61af66fc99e Initial load
duke
parents:
diff changeset
1541 Node *need_pf_false = new (C, 1) IfFalseNode( need_pf_iff );
a61af66fc99e Initial load
duke
parents:
diff changeset
1542 transform_later(need_pf_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1543
a61af66fc99e Initial load
duke
parents:
diff changeset
1544 Node *new_pf_wmt = new (C, 4) AddPNode( top(), old_pf_wm,
a61af66fc99e Initial load
duke
parents:
diff changeset
1545 _igvn.MakeConX(AllocatePrefetchDistance) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1546 transform_later(new_pf_wmt );
a61af66fc99e Initial load
duke
parents:
diff changeset
1547 new_pf_wmt->set_req(0, need_pf_true);
a61af66fc99e Initial load
duke
parents:
diff changeset
1548
a61af66fc99e Initial load
duke
parents:
diff changeset
1549 Node *store_new_wmt = new (C, 4) StorePNode( need_pf_true,
a61af66fc99e Initial load
duke
parents:
diff changeset
1550 contended_phi_rawmem, eden_pf_adr,
a61af66fc99e Initial load
duke
parents:
diff changeset
1551 TypeRawPtr::BOTTOM, new_pf_wmt );
a61af66fc99e Initial load
duke
parents:
diff changeset
1552 transform_later(store_new_wmt);
a61af66fc99e Initial load
duke
parents:
diff changeset
1553
a61af66fc99e Initial load
duke
parents:
diff changeset
1554 // adding prefetches
a61af66fc99e Initial load
duke
parents:
diff changeset
1555 pf_phi_abio->init_req( fall_in_path, i_o );
a61af66fc99e Initial load
duke
parents:
diff changeset
1556
a61af66fc99e Initial load
duke
parents:
diff changeset
1557 Node *prefetch_adr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1558 Node *prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1559 uint lines = AllocatePrefetchDistance / AllocatePrefetchStepSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
1560 uint step_size = AllocatePrefetchStepSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
1561 uint distance = 0;
a61af66fc99e Initial load
duke
parents:
diff changeset
1562
a61af66fc99e Initial load
duke
parents:
diff changeset
1563 for ( uint i = 0; i < lines; i++ ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1564 prefetch_adr = new (C, 4) AddPNode( old_pf_wm, new_pf_wmt,
a61af66fc99e Initial load
duke
parents:
diff changeset
1565 _igvn.MakeConX(distance) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1566 transform_later(prefetch_adr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1567 prefetch = new (C, 3) PrefetchWriteNode( i_o, prefetch_adr );
a61af66fc99e Initial load
duke
parents:
diff changeset
1568 transform_later(prefetch);
a61af66fc99e Initial load
duke
parents:
diff changeset
1569 distance += step_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1570 i_o = prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1571 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1572 pf_phi_abio->set_req( pf_path, i_o );
a61af66fc99e Initial load
duke
parents:
diff changeset
1573
a61af66fc99e Initial load
duke
parents:
diff changeset
1574 pf_region->init_req( fall_in_path, need_pf_false );
a61af66fc99e Initial load
duke
parents:
diff changeset
1575 pf_region->init_req( pf_path, need_pf_true );
a61af66fc99e Initial load
duke
parents:
diff changeset
1576
a61af66fc99e Initial load
duke
parents:
diff changeset
1577 pf_phi_rawmem->init_req( fall_in_path, contended_phi_rawmem );
a61af66fc99e Initial load
duke
parents:
diff changeset
1578 pf_phi_rawmem->init_req( pf_path, store_new_wmt );
a61af66fc99e Initial load
duke
parents:
diff changeset
1579
a61af66fc99e Initial load
duke
parents:
diff changeset
1580 transform_later(pf_region);
a61af66fc99e Initial load
duke
parents:
diff changeset
1581 transform_later(pf_phi_rawmem);
a61af66fc99e Initial load
duke
parents:
diff changeset
1582 transform_later(pf_phi_abio);
a61af66fc99e Initial load
duke
parents:
diff changeset
1583
a61af66fc99e Initial load
duke
parents:
diff changeset
1584 needgc_false = pf_region;
a61af66fc99e Initial load
duke
parents:
diff changeset
1585 contended_phi_rawmem = pf_phi_rawmem;
a61af66fc99e Initial load
duke
parents:
diff changeset
1586 i_o = pf_phi_abio;
1367
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1587 } else if( UseTLAB && AllocatePrefetchStyle == 3 ) {
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1588 // Insert a prefetch for each allocation only on the fast-path
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1589 Node *pf_region = new (C, 3) RegionNode(3);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1590 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
1591 TypeRawPtr::BOTTOM );
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1592
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1593 // Generate several prefetch instructions only for arrays.
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1594 uint lines = (length != NULL) ? AllocatePrefetchLines : 1;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1595 uint step_size = AllocatePrefetchStepSize;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1596 uint distance = AllocatePrefetchDistance;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1597
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1598 // Next cache address.
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1599 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
1600 _igvn.MakeConX(distance));
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1601 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1602 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
1603 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1604 Node* mask = _igvn.MakeConX(~(intptr_t)(step_size-1));
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1605 cache_adr = new (C, 3) AndXNode(cache_adr, mask);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1606 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1607 cache_adr = new (C, 2) CastX2PNode(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1608 transform_later(cache_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1609
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1610 // Prefetch
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1611 Node *prefetch = new (C, 3) PrefetchWriteNode( contended_phi_rawmem, cache_adr );
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1612 prefetch->set_req(0, needgc_false);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1613 transform_later(prefetch);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1614 contended_phi_rawmem = prefetch;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1615 Node *prefetch_adr;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1616 distance = step_size;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1617 for ( uint i = 1; i < lines; i++ ) {
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1618 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
1619 _igvn.MakeConX(distance) );
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1620 transform_later(prefetch_adr);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1621 prefetch = new (C, 3) PrefetchWriteNode( contended_phi_rawmem, prefetch_adr );
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1622 transform_later(prefetch);
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1623 distance += step_size;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1624 contended_phi_rawmem = prefetch;
9e321dcfa5b7 6940726: Use BIS instruction for allocation prefetch on Sparc
kvn
parents: 1100
diff changeset
1625 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1626 } else if( AllocatePrefetchStyle > 0 ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1627 // Insert a prefetch for each allocation only on the fast-path
a61af66fc99e Initial load
duke
parents:
diff changeset
1628 Node *prefetch_adr;
a61af66fc99e Initial load
duke
parents:
diff changeset
1629 Node *prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1630 // Generate several prefetch instructions only for arrays.
a61af66fc99e Initial load
duke
parents:
diff changeset
1631 uint lines = (length != NULL) ? AllocatePrefetchLines : 1;
a61af66fc99e Initial load
duke
parents:
diff changeset
1632 uint step_size = AllocatePrefetchStepSize;
a61af66fc99e Initial load
duke
parents:
diff changeset
1633 uint distance = AllocatePrefetchDistance;
a61af66fc99e Initial load
duke
parents:
diff changeset
1634 for ( uint i = 0; i < lines; i++ ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1635 prefetch_adr = new (C, 4) AddPNode( old_eden_top, new_eden_top,
a61af66fc99e Initial load
duke
parents:
diff changeset
1636 _igvn.MakeConX(distance) );
a61af66fc99e Initial load
duke
parents:
diff changeset
1637 transform_later(prefetch_adr);
a61af66fc99e Initial load
duke
parents:
diff changeset
1638 prefetch = new (C, 3) PrefetchWriteNode( i_o, prefetch_adr );
a61af66fc99e Initial load
duke
parents:
diff changeset
1639 // Do not let it float too high, since if eden_top == eden_end,
a61af66fc99e Initial load
duke
parents:
diff changeset
1640 // both might be null.
a61af66fc99e Initial load
duke
parents:
diff changeset
1641 if( i == 0 ) { // Set control for first prefetch, next follows it
a61af66fc99e Initial load
duke
parents:
diff changeset
1642 prefetch->init_req(0, needgc_false);
a61af66fc99e Initial load
duke
parents:
diff changeset
1643 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1644 transform_later(prefetch);
a61af66fc99e Initial load
duke
parents:
diff changeset
1645 distance += step_size;
a61af66fc99e Initial load
duke
parents:
diff changeset
1646 i_o = prefetch;
a61af66fc99e Initial load
duke
parents:
diff changeset
1647 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1648 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1649 return i_o;
a61af66fc99e Initial load
duke
parents:
diff changeset
1650 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1651
a61af66fc99e Initial load
duke
parents:
diff changeset
1652
a61af66fc99e Initial load
duke
parents:
diff changeset
1653 void PhaseMacroExpand::expand_allocate(AllocateNode *alloc) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1654 expand_allocate_common(alloc, NULL,
a61af66fc99e Initial load
duke
parents:
diff changeset
1655 OptoRuntime::new_instance_Type(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1656 OptoRuntime::new_instance_Java());
a61af66fc99e Initial load
duke
parents:
diff changeset
1657 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1658
a61af66fc99e Initial load
duke
parents:
diff changeset
1659 void PhaseMacroExpand::expand_allocate_array(AllocateArrayNode *alloc) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1660 Node* length = alloc->in(AllocateNode::ALength);
a61af66fc99e Initial load
duke
parents:
diff changeset
1661 expand_allocate_common(alloc, length,
a61af66fc99e Initial load
duke
parents:
diff changeset
1662 OptoRuntime::new_array_Type(),
a61af66fc99e Initial load
duke
parents:
diff changeset
1663 OptoRuntime::new_array_Java());
a61af66fc99e Initial load
duke
parents:
diff changeset
1664 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1665
a61af66fc99e Initial load
duke
parents:
diff changeset
1666
a61af66fc99e Initial load
duke
parents:
diff changeset
1667 // we have determined that this lock/unlock can be eliminated, we simply
a61af66fc99e Initial load
duke
parents:
diff changeset
1668 // eliminate the node without expanding it.
a61af66fc99e Initial load
duke
parents:
diff changeset
1669 //
a61af66fc99e Initial load
duke
parents:
diff changeset
1670 // Note: The membar's associated with the lock/unlock are currently not
a61af66fc99e Initial load
duke
parents:
diff changeset
1671 // eliminated. This should be investigated as a future enhancement.
a61af66fc99e Initial load
duke
parents:
diff changeset
1672 //
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1673 bool PhaseMacroExpand::eliminate_locking_node(AbstractLockNode *alock) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1674
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1675 if (!alock->is_eliminated()) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1676 return false;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1677 }
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1678 if (alock->is_Lock() && !alock->is_coarsened()) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1679 // Create new "eliminated" BoxLock node and use it
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1680 // in monitor debug info for the same object.
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1681 BoxLockNode* oldbox = alock->box_node()->as_BoxLock();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1682 Node* obj = alock->obj_node();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1683 if (!oldbox->is_eliminated()) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1684 BoxLockNode* newbox = oldbox->clone()->as_BoxLock();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1685 newbox->set_eliminated();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1686 transform_later(newbox);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1687 // Replace old box node with new box for all users
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1688 // of the same object.
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1689 for (uint i = 0; i < oldbox->outcnt();) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1690
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1691 bool next_edge = true;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1692 Node* u = oldbox->raw_out(i);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1693 if (u == alock) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1694 i++;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1695 continue; // It will be removed below
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1696 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1697 if (u->is_Lock() &&
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1698 u->as_Lock()->obj_node() == obj &&
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1699 // oldbox could be referenced in debug info also
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1700 u->as_Lock()->box_node() == oldbox) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1701 assert(u->as_Lock()->is_eliminated(), "sanity");
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1702 _igvn.hash_delete(u);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1703 u->set_req(TypeFunc::Parms + 1, newbox);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1704 next_edge = false;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1705 #ifdef ASSERT
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1706 } else if (u->is_Unlock() && u->as_Unlock()->obj_node() == obj) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1707 assert(u->as_Unlock()->is_eliminated(), "sanity");
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1708 #endif
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1709 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1710 // Replace old box in monitor debug info.
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1711 if (u->is_SafePoint() && u->as_SafePoint()->jvms()) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1712 SafePointNode* sfn = u->as_SafePoint();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1713 JVMState* youngest_jvms = sfn->jvms();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1714 int max_depth = youngest_jvms->depth();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1715 for (int depth = 1; depth <= max_depth; depth++) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1716 JVMState* jvms = youngest_jvms->of_depth(depth);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1717 int num_mon = jvms->nof_monitors();
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1718 // Loop over monitors
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1719 for (int idx = 0; idx < num_mon; idx++) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1720 Node* obj_node = sfn->monitor_obj(jvms, idx);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1721 Node* box_node = sfn->monitor_box(jvms, idx);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1722 if (box_node == oldbox && obj_node == obj) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1723 int j = jvms->monitor_box_offset(idx);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1724 _igvn.hash_delete(u);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1725 u->set_req(j, newbox);
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1726 next_edge = false;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1727 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1728 } // for (int idx = 0;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1729 } // for (int depth = 1;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1730 } // if (u->is_SafePoint()
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1731 if (next_edge) i++;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1732 } // for (uint i = 0; i < oldbox->outcnt();)
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1733 } // if (!oldbox->is_eliminated())
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1734 } // if (alock->is_Lock() && !lock->is_coarsened())
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1735
1080
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1736 CompileLog* log = C->log();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1737 if (log != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1738 log->head("eliminate_lock lock='%d'",
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1739 alock->is_Lock());
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1740 JVMState* p = alock->jvms();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1741 while (p != NULL) {
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1742 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
1743 p = p->caller();
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1744 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1745 log->tail("eliminate_lock");
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1746 }
7c57aead6d3e 6892658: C2 should optimize some stringbuilder patterns
never
parents: 851
diff changeset
1747
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1748 #ifndef PRODUCT
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1749 if (PrintEliminateLocks) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1750 if (alock->is_Lock()) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1751 tty->print_cr("++++ Eliminating: %d Lock", alock->_idx);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1752 } else {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1753 tty->print_cr("++++ Eliminating: %d Unlock", alock->_idx);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1754 }
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1755 }
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1756 #endif
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1757
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1758 Node* mem = alock->in(TypeFunc::Memory);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1759 Node* ctrl = alock->in(TypeFunc::Control);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1760
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1761 extract_call_projections(alock);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1762 // 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
1763 // be deleted when its last use is subsumed below.
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1764 assert(alock->outcnt() == 2 &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1765 _fallthroughproj != NULL &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1766 _memproj_fallthrough != NULL,
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1767 "Unexpected projections from Lock/Unlock");
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1768
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1769 Node* fallthroughproj = _fallthroughproj;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1770 Node* memproj_fallthrough = _memproj_fallthrough;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1771
a61af66fc99e Initial load
duke
parents:
diff changeset
1772 // The memory projection from a lock/unlock is RawMem
a61af66fc99e Initial load
duke
parents:
diff changeset
1773 // The input to a Lock is merged memory, so extract its RawMem input
a61af66fc99e Initial load
duke
parents:
diff changeset
1774 // (unless the MergeMem has been optimized away.)
a61af66fc99e Initial load
duke
parents:
diff changeset
1775 if (alock->is_Lock()) {
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1776 // Seach for MemBarAcquire node and delete it also.
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1777 MemBarNode* membar = fallthroughproj->unique_ctrl_out()->as_MemBar();
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1778 assert(membar != NULL && membar->Opcode() == Op_MemBarAcquire, "");
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1779 Node* ctrlproj = membar->proj_out(TypeFunc::Control);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1780 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
1781 _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
1782 _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
1783
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1784 // 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
1785 // (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
1786 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
1787 if (flock->outcnt() == 1) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
1788 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
1789 _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
1790 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1791 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1792
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1793 // Seach for MemBarRelease node and delete it also.
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1794 if (alock->is_Unlock() && ctrl != NULL && ctrl->is_Proj() &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1795 ctrl->in(0)->is_MemBar()) {
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1796 MemBarNode* membar = ctrl->in(0)->as_MemBar();
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1797 assert(membar->Opcode() == Op_MemBarRelease &&
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1798 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
1799 _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
1800 _igvn.replace_node(memproj_fallthrough, mem);
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1801 fallthroughproj = ctrl;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1802 memproj_fallthrough = mem;
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1803 ctrl = membar->in(TypeFunc::Control);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1804 mem = membar->in(TypeFunc::Memory);
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1805 }
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1806
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
1807 _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
1808 _igvn.replace_node(memproj_fallthrough, mem);
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1809 return true;
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1810 }
a61af66fc99e Initial load
duke
parents:
diff changeset
1811
a61af66fc99e Initial load
duke
parents:
diff changeset
1812
a61af66fc99e Initial load
duke
parents:
diff changeset
1813 //------------------------------expand_lock_node----------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
1814 void PhaseMacroExpand::expand_lock_node(LockNode *lock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
1815
a61af66fc99e Initial load
duke
parents:
diff changeset
1816 Node* ctrl = lock->in(TypeFunc::Control);
a61af66fc99e Initial load
duke
parents:
diff changeset
1817 Node* mem = lock->in(TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
1818 Node* obj = lock->obj_node();
a61af66fc99e Initial load
duke
parents:
diff changeset
1819 Node* box = lock->box_node();
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
1820 Node* flock = lock->fastlock_node();
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1821
a61af66fc99e Initial load
duke
parents:
diff changeset
1822 // Make the merge point
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1823 Node *region;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1824 Node *mem_phi;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1825 Node *slow_path;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1826
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1827 if (UseOptoBiasInlining) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1828 /*
605
98cb887364d3 6810672: Comment typos
twisti
parents: 601
diff changeset
1829 * 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
1830 *
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1831 * if( (mark_word & biased_lock_mask) == biased_lock_pattern ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1832 * // The object is biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1833 * proto_node = klass->prototype_header;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1834 * o_node = thread | proto_node;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1835 * x_node = o_node ^ mark_word;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1836 * 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
1837 * // Done.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1838 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1839 * if( (x_node & biased_lock_mask) != 0 ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1840 * // The klass's prototype header is no longer biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1841 * cas(&mark_word, mark_word, proto_node)
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1842 * goto cas_lock;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1843 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1844 * // The klass's prototype header is still biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1845 * if( (x_node & epoch_mask) != 0 ) { // Expired epoch?
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1846 * old = mark_word;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1847 * new = o_node;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1848 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1849 * // Different thread or anonymous biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1850 * 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
1851 * new = thread | old;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1852 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1853 * // Try to rebias.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1854 * if( cas(&mark_word, old, new) == 0 ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1855 * // Done.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1856 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1857 * goto slow_path; // Failed.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1858 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1859 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1860 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1861 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1862 * // The object is not biased.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1863 * cas_lock:
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1864 * if( FastLock(obj) == 0 ) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1865 * // Done.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1866 * } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1867 * slow_path:
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1868 * OptoRuntime::complete_monitor_locking_Java(obj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1869 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1870 * }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1871 */
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1872
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1873 region = new (C, 5) RegionNode(5);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1874 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1875 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
1876
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1877 Node* fast_lock_region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1878 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
1879
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1880 // First, check mark word for the biased lock pattern.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1881 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
1882
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1883 // 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
1884 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
1885 markOopDesc::biased_lock_mask_in_place,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1886 markOopDesc::biased_lock_pattern, true);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1887 // 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
1888 fast_lock_mem_phi->init_req(1, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1889
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1890 // 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
1891 // the same epoch and bias as Klass::_prototype_header.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1892
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1893 // Special-case a fresh allocation to avoid building nodes:
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1894 Node* klass_node = AllocateNode::Ideal_klass(obj, &_igvn);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1895 if (klass_node == NULL) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1896 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
1897 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
1898 #ifdef _LP64
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
1899 if (UseCompressedOops && klass_node->is_DecodeN()) {
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
1900 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
1901 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
1902 } else
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
1903 #endif
dd70dd4c91de 6782820: Server VM fails with "unhandled implicit exception in compiled code"
kvn
parents: 460
diff changeset
1904 klass_node->init_req(0, ctrl);
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1905 }
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1906 Node *proto_node = make_load(ctrl, mem, klass_node, Klass::prototype_header_offset_in_bytes() + sizeof(oopDesc), TypeX_X, TypeX_X->basic_type());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1907
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1908 Node* thread = transform_later(new (C, 1) ThreadLocalNode());
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1909 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
1910 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
1911 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
1912
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1913 // 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
1914 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
1915 (~markOopDesc::age_mask_in_place), 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1916 // 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
1917 mem_phi->init_req(3, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1918
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1919
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1920 // 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
1921
0
a61af66fc99e Initial load
duke
parents:
diff changeset
1922
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1923 // First, check biased pattern.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1924 // 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
1925 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
1926 markOopDesc::biased_lock_mask_in_place, 0, true);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1927
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1928 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
1929 // 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
1930 // 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
1931 // 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
1932 // 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
1933 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
1934 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
1935 proto_node, mark_node);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1936 transform_later(cas);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1937 Node* proj = transform_later( new (C, 1) SCMemProjNode(cas));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1938 fast_lock_mem_phi->init_req(2, proj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1939
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1940
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1941 // Second, check epoch bits.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1942 Node* rebiased_region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1943 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
1944 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
1945
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1946 // 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
1947 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
1948 markOopDesc::epoch_mask_in_place, 0);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1949 // 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
1950 // toward the current thread.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1951 rebiased_region->init_req(2, epoch_ctrl);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1952 old_phi->init_req(2, mark_node);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1953 new_phi->init_req(2, o_node);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1954
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1955 // rebiased_region->in(1) is set to fast path.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1956 // 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
1957 // 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
1958 Node* cmask = MakeConX(markOopDesc::biased_lock_mask_in_place |
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1959 markOopDesc::age_mask_in_place |
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1960 markOopDesc::epoch_mask_in_place);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1961 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
1962 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
1963 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
1964 old_phi->init_req(1, old);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1965 new_phi->init_req(1, new_mark);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1966
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1967 transform_later(rebiased_region);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1968 transform_later(old_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1969 transform_later(new_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1970
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1971 // 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
1972 // 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
1973 cas = new (C, 5) StoreXConditionalNode(rebiased_region, mem, adr,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1974 new_phi, old_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1975 transform_later(cas);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1976 proj = transform_later( new (C, 1) SCMemProjNode(cas));
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1977
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1978 // Get slow path - Failed to CAS.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1979 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
1980 mem_phi->init_req(4, proj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1981 // 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
1982
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1983 // Failed to CAS.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1984 slow_path = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1985 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
1986
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1987 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
1988 slow_mem->init_req(1, proj);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1989
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1990 // Call CAS-based locking scheme (FastLock node).
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1991
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1992 transform_later(fast_lock_region);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1993 transform_later(fast_lock_mem_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1994
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1995 // Get slow path - FastLock failed to lock the object.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1996 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
1997 mem_phi->init_req(2, fast_lock_mem_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
1998 // 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
1999
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2000 slow_path->init_req(2, ctrl); // Capture slow-control
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2001 slow_mem->init_req(2, fast_lock_mem_phi);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2002
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2003 transform_later(slow_path);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2004 transform_later(slow_mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2005 // Reset lock's memory edge.
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2006 lock->set_req(TypeFunc::Memory, slow_mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2007
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2008 } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2009 region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2010 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2011 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
2012
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2013 // Optimize test; set region slot 2
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2014 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
2015 mem_phi->init_req(2, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2016 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2017
a61af66fc99e Initial load
duke
parents:
diff changeset
2018 // Make slow path call
a61af66fc99e Initial load
duke
parents:
diff changeset
2019 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
2020
a61af66fc99e Initial load
duke
parents:
diff changeset
2021 extract_call_projections(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
2022
a61af66fc99e Initial load
duke
parents:
diff changeset
2023 // Slow path can only throw asynchronous exceptions, which are always
a61af66fc99e Initial load
duke
parents:
diff changeset
2024 // de-opted. So the compiler thinks the slow-call can never throw an
a61af66fc99e Initial load
duke
parents:
diff changeset
2025 // exception. If it DOES throw an exception we would need the debug
a61af66fc99e Initial load
duke
parents:
diff changeset
2026 // info removed first (since if it throws there is no monitor).
a61af66fc99e Initial load
duke
parents:
diff changeset
2027 assert ( _ioproj_fallthrough == NULL && _ioproj_catchall == NULL &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2028 _memproj_catchall == NULL && _catchallcatchproj == NULL, "Unexpected projection from Lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
2029
a61af66fc99e Initial load
duke
parents:
diff changeset
2030 // Capture slow path
a61af66fc99e Initial load
duke
parents:
diff changeset
2031 // disconnect fall-through projection from call and create a new one
a61af66fc99e Initial load
duke
parents:
diff changeset
2032 // hook up users of fall-through projection to region
a61af66fc99e Initial load
duke
parents:
diff changeset
2033 Node *slow_ctrl = _fallthroughproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
2034 transform_later(slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2035 _igvn.hash_delete(_fallthroughproj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2036 _fallthroughproj->disconnect_inputs(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2037 region->init_req(1, slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2038 // region inputs are now complete
a61af66fc99e Initial load
duke
parents:
diff changeset
2039 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
2040 _igvn.replace_node(_fallthroughproj, region);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2041
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2042 Node *memproj = transform_later( new(C, 1) ProjNode(call, TypeFunc::Memory) );
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2043 mem_phi->init_req(1, memproj );
a61af66fc99e Initial load
duke
parents:
diff changeset
2044 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
2045 _igvn.replace_node(_memproj_fallthrough, mem_phi);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2046 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2047
a61af66fc99e Initial load
duke
parents:
diff changeset
2048 //------------------------------expand_unlock_node----------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
2049 void PhaseMacroExpand::expand_unlock_node(UnlockNode *unlock) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2050
66
6dbf1a175d6b 6672848: (Escape Analysis) improve lock elimination with EA
kvn
parents: 63
diff changeset
2051 Node* ctrl = unlock->in(TypeFunc::Control);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2052 Node* mem = unlock->in(TypeFunc::Memory);
a61af66fc99e Initial load
duke
parents:
diff changeset
2053 Node* obj = unlock->obj_node();
a61af66fc99e Initial load
duke
parents:
diff changeset
2054 Node* box = unlock->box_node();
a61af66fc99e Initial load
duke
parents:
diff changeset
2055
a61af66fc99e Initial load
duke
parents:
diff changeset
2056 // No need for a null check on unlock
a61af66fc99e Initial load
duke
parents:
diff changeset
2057
a61af66fc99e Initial load
duke
parents:
diff changeset
2058 // Make the merge point
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2059 Node *region;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2060 Node *mem_phi;
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2061
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2062 if (UseOptoBiasInlining) {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2063 // Check for biased locking unlock case, which is a no-op.
605
98cb887364d3 6810672: Comment typos
twisti
parents: 601
diff changeset
2064 // 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
2065 region = new (C, 4) RegionNode(4);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2066 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2067 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
2068 mem_phi->init_req(3, mem);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2069
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2070 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
2071 ctrl = opt_bits_test(ctrl, region, 3, mark_node,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2072 markOopDesc::biased_lock_mask_in_place,
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2073 markOopDesc::biased_lock_pattern);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2074 } else {
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2075 region = new (C, 3) RegionNode(3);
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2076 // create a Phi for the memory state
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2077 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
2078 }
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2079
a61af66fc99e Initial load
duke
parents:
diff changeset
2080 FastUnlockNode *funlock = new (C, 3) FastUnlockNode( ctrl, obj, box );
a61af66fc99e Initial load
duke
parents:
diff changeset
2081 funlock = transform_later( funlock )->as_FastUnlock();
a61af66fc99e Initial load
duke
parents:
diff changeset
2082 // Optimize test; set region slot 2
420
a1980da045cc 6462850: generate biased locking code in C2 ideal graph
kvn
parents: 362
diff changeset
2083 Node *slow_path = opt_bits_test(ctrl, region, 2, funlock, 0, 0);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2084
a61af66fc99e Initial load
duke
parents:
diff changeset
2085 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
2086
a61af66fc99e Initial load
duke
parents:
diff changeset
2087 extract_call_projections(call);
a61af66fc99e Initial load
duke
parents:
diff changeset
2088
a61af66fc99e Initial load
duke
parents:
diff changeset
2089 assert ( _ioproj_fallthrough == NULL && _ioproj_catchall == NULL &&
a61af66fc99e Initial load
duke
parents:
diff changeset
2090 _memproj_catchall == NULL && _catchallcatchproj == NULL, "Unexpected projection from Lock");
a61af66fc99e Initial load
duke
parents:
diff changeset
2091
a61af66fc99e Initial load
duke
parents:
diff changeset
2092 // No exceptions for unlocking
a61af66fc99e Initial load
duke
parents:
diff changeset
2093 // Capture slow path
a61af66fc99e Initial load
duke
parents:
diff changeset
2094 // disconnect fall-through projection from call and create a new one
a61af66fc99e Initial load
duke
parents:
diff changeset
2095 // hook up users of fall-through projection to region
a61af66fc99e Initial load
duke
parents:
diff changeset
2096 Node *slow_ctrl = _fallthroughproj->clone();
a61af66fc99e Initial load
duke
parents:
diff changeset
2097 transform_later(slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2098 _igvn.hash_delete(_fallthroughproj);
a61af66fc99e Initial load
duke
parents:
diff changeset
2099 _fallthroughproj->disconnect_inputs(NULL);
a61af66fc99e Initial load
duke
parents:
diff changeset
2100 region->init_req(1, slow_ctrl);
a61af66fc99e Initial load
duke
parents:
diff changeset
2101 // region inputs are now complete
a61af66fc99e Initial load
duke
parents:
diff changeset
2102 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
2103 _igvn.replace_node(_fallthroughproj, region);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2104
a61af66fc99e Initial load
duke
parents:
diff changeset
2105 Node *memproj = transform_later( new(C, 1) ProjNode(call, TypeFunc::Memory) );
a61af66fc99e Initial load
duke
parents:
diff changeset
2106 mem_phi->init_req(1, memproj );
a61af66fc99e Initial load
duke
parents:
diff changeset
2107 mem_phi->init_req(2, mem);
a61af66fc99e Initial load
duke
parents:
diff changeset
2108 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
2109 _igvn.replace_node(_memproj_fallthrough, mem_phi);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2110 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2111
a61af66fc99e Initial load
duke
parents:
diff changeset
2112 //------------------------------expand_macro_nodes----------------------
a61af66fc99e Initial load
duke
parents:
diff changeset
2113 // Returns true if a failure occurred.
a61af66fc99e Initial load
duke
parents:
diff changeset
2114 bool PhaseMacroExpand::expand_macro_nodes() {
a61af66fc99e Initial load
duke
parents:
diff changeset
2115 if (C->macro_count() == 0)
a61af66fc99e Initial load
duke
parents:
diff changeset
2116 return false;
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2117 // First, attempt to eliminate locks
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2118 bool progress = true;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2119 while (progress) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2120 progress = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2121 for (int i = C->macro_count(); i > 0; i--) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2122 Node * n = C->macro_node(i-1);
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2123 bool success = false;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2124 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
2125 if (n->is_AbstractLock()) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2126 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
2127 } else if (n->Opcode() == Op_Opaque1 || n->Opcode() == Op_Opaque2) {
708
f2049ae95c3d 6711117: Assertion in 64bit server vm (flat != TypePtr::BOTTOM,"cannot alias-analyze an untyped ptr")
kvn
parents: 628
diff changeset
2128 _igvn.replace_node(n, n->in(1));
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2129 success = true;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2130 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2131 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
2132 progress = progress || success;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2133 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2134 }
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2135 // 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
2136 progress = true;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2137 while (progress) {
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2138 progress = false;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2139 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
2140 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
2141 bool success = false;
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2142 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
2143 switch (n->class_id()) {
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2144 case Node::Class_Allocate:
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2145 case Node::Class_AllocateArray:
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2146 success = eliminate_allocate_node(n->as_Allocate());
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2147 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2148 case Node::Class_Lock:
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2149 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
2150 assert(!n->as_AbstractLock()->is_eliminated(), "sanity");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2151 break;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2152 default:
460
424f9bfe6b96 6775880: EA +DeoptimizeALot: assert(mon_info->owner()->is_locked(),"object must be locked now")
kvn
parents: 436
diff changeset
2153 assert(false, "unknown node type in macro list");
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2154 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2155 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
2156 progress = progress || success;
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2157 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2158 }
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2159 // 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
2160 // 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
2161 // Allow 50% more for optimization.
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2162 if (C->check_node_count(C->macro_count() * 75, "out of nodes before macro expansion" ) )
a61af66fc99e Initial load
duke
parents:
diff changeset
2163 return true;
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2164
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2165 // expand "macro" nodes
a61af66fc99e Initial load
duke
parents:
diff changeset
2166 // nodes are removed from the macro list as they are processed
a61af66fc99e Initial load
duke
parents:
diff changeset
2167 while (C->macro_count() > 0) {
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2168 int macro_count = C->macro_count();
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2169 Node * n = C->macro_node(macro_count-1);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2170 assert(n->is_macro(), "only macro nodes expected here");
a61af66fc99e Initial load
duke
parents:
diff changeset
2171 if (_igvn.type(n) == Type::TOP || n->in(0)->is_top() ) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2172 // node is unreachable, so don't try to expand it
a61af66fc99e Initial load
duke
parents:
diff changeset
2173 C->remove_macro_node(n);
a61af66fc99e Initial load
duke
parents:
diff changeset
2174 continue;
a61af66fc99e Initial load
duke
parents:
diff changeset
2175 }
a61af66fc99e Initial load
duke
parents:
diff changeset
2176 switch (n->class_id()) {
a61af66fc99e Initial load
duke
parents:
diff changeset
2177 case Node::Class_Allocate:
a61af66fc99e Initial load
duke
parents:
diff changeset
2178 expand_allocate(n->as_Allocate());
a61af66fc99e Initial load
duke
parents:
diff changeset
2179 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2180 case Node::Class_AllocateArray:
a61af66fc99e Initial load
duke
parents:
diff changeset
2181 expand_allocate_array(n->as_AllocateArray());
a61af66fc99e Initial load
duke
parents:
diff changeset
2182 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2183 case Node::Class_Lock:
a61af66fc99e Initial load
duke
parents:
diff changeset
2184 expand_lock_node(n->as_Lock());
a61af66fc99e Initial load
duke
parents:
diff changeset
2185 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2186 case Node::Class_Unlock:
a61af66fc99e Initial load
duke
parents:
diff changeset
2187 expand_unlock_node(n->as_Unlock());
a61af66fc99e Initial load
duke
parents:
diff changeset
2188 break;
a61af66fc99e Initial load
duke
parents:
diff changeset
2189 default:
a61af66fc99e Initial load
duke
parents:
diff changeset
2190 assert(false, "unknown node type in macro list");
a61af66fc99e Initial load
duke
parents:
diff changeset
2191 }
73
a8880a78d355 6259129: (Escape Analysis) scalar replacement for not escaping objects
kvn
parents: 66
diff changeset
2192 assert(C->macro_count() < macro_count, "must have deleted a node from macro list");
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2193 if (C->failing()) return true;
a61af66fc99e Initial load
duke
parents:
diff changeset
2194 }
113
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
2195
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents: 73
diff changeset
2196 _igvn.set_delay_transform(false);
0
a61af66fc99e Initial load
duke
parents:
diff changeset
2197 _igvn.optimize();
a61af66fc99e Initial load
duke
parents:
diff changeset
2198 return false;
a61af66fc99e Initial load
duke
parents:
diff changeset
2199 }