0
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1 /*
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2 * Copyright 2005-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_c1_LIRGenerator.cpp.incl"
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27
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28 #ifdef ASSERT
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29 #define __ gen()->lir(__FILE__, __LINE__)->
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30 #else
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31 #define __ gen()->lir()->
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32 #endif
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33
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34
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35 void PhiResolverState::reset(int max_vregs) {
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36 // Initialize array sizes
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37 _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL);
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38 _virtual_operands.trunc_to(0);
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39 _other_operands.at_put_grow(max_vregs - 1, NULL, NULL);
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40 _other_operands.trunc_to(0);
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41 _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL);
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42 _vreg_table.trunc_to(0);
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43 }
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44
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45
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46
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47 //--------------------------------------------------------------
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48 // PhiResolver
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49
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50 // Resolves cycles:
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51 //
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52 // r1 := r2 becomes temp := r1
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53 // r2 := r1 r1 := r2
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54 // r2 := temp
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55 // and orders moves:
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56 //
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57 // r2 := r3 becomes r1 := r2
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58 // r1 := r2 r2 := r3
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59
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60 PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs)
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61 : _gen(gen)
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62 , _state(gen->resolver_state())
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63 , _temp(LIR_OprFact::illegalOpr)
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64 {
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65 // reinitialize the shared state arrays
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66 _state.reset(max_vregs);
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67 }
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68
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69
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70 void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) {
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71 assert(src->is_valid(), "");
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72 assert(dest->is_valid(), "");
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73 __ move(src, dest);
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74 }
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75
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76
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77 void PhiResolver::move_temp_to(LIR_Opr dest) {
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78 assert(_temp->is_valid(), "");
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79 emit_move(_temp, dest);
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80 NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr);
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81 }
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82
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83
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84 void PhiResolver::move_to_temp(LIR_Opr src) {
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85 assert(_temp->is_illegal(), "");
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86 _temp = _gen->new_register(src->type());
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87 emit_move(src, _temp);
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88 }
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89
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90
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91 // Traverse assignment graph in depth first order and generate moves in post order
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92 // ie. two assignments: b := c, a := b start with node c:
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93 // Call graph: move(NULL, c) -> move(c, b) -> move(b, a)
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94 // Generates moves in this order: move b to a and move c to b
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95 // ie. cycle a := b, b := a start with node a
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96 // Call graph: move(NULL, a) -> move(a, b) -> move(b, a)
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97 // Generates moves in this order: move b to temp, move a to b, move temp to a
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98 void PhiResolver::move(ResolveNode* src, ResolveNode* dest) {
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99 if (!dest->visited()) {
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100 dest->set_visited();
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101 for (int i = dest->no_of_destinations()-1; i >= 0; i --) {
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102 move(dest, dest->destination_at(i));
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103 }
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104 } else if (!dest->start_node()) {
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105 // cylce in graph detected
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106 assert(_loop == NULL, "only one loop valid!");
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107 _loop = dest;
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108 move_to_temp(src->operand());
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109 return;
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110 } // else dest is a start node
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111
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112 if (!dest->assigned()) {
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113 if (_loop == dest) {
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114 move_temp_to(dest->operand());
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115 dest->set_assigned();
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116 } else if (src != NULL) {
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117 emit_move(src->operand(), dest->operand());
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118 dest->set_assigned();
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119 }
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120 }
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121 }
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122
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123
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124 PhiResolver::~PhiResolver() {
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125 int i;
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126 // resolve any cycles in moves from and to virtual registers
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127 for (i = virtual_operands().length() - 1; i >= 0; i --) {
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128 ResolveNode* node = virtual_operands()[i];
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129 if (!node->visited()) {
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130 _loop = NULL;
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131 move(NULL, node);
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132 node->set_start_node();
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133 assert(_temp->is_illegal(), "move_temp_to() call missing");
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134 }
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135 }
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136
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137 // generate move for move from non virtual register to abitrary destination
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138 for (i = other_operands().length() - 1; i >= 0; i --) {
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139 ResolveNode* node = other_operands()[i];
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140 for (int j = node->no_of_destinations() - 1; j >= 0; j --) {
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141 emit_move(node->operand(), node->destination_at(j)->operand());
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142 }
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143 }
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144 }
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145
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146
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147 ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) {
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148 ResolveNode* node;
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149 if (opr->is_virtual()) {
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150 int vreg_num = opr->vreg_number();
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151 node = vreg_table().at_grow(vreg_num, NULL);
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152 assert(node == NULL || node->operand() == opr, "");
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153 if (node == NULL) {
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154 node = new ResolveNode(opr);
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155 vreg_table()[vreg_num] = node;
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156 }
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157 // Make sure that all virtual operands show up in the list when
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158 // they are used as the source of a move.
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159 if (source && !virtual_operands().contains(node)) {
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160 virtual_operands().append(node);
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161 }
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162 } else {
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163 assert(source, "");
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164 node = new ResolveNode(opr);
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165 other_operands().append(node);
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166 }
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167 return node;
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168 }
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169
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170
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171 void PhiResolver::move(LIR_Opr src, LIR_Opr dest) {
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172 assert(dest->is_virtual(), "");
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173 // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr();
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174 assert(src->is_valid(), "");
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175 assert(dest->is_valid(), "");
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176 ResolveNode* source = source_node(src);
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177 source->append(destination_node(dest));
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178 }
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179
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180
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181 //--------------------------------------------------------------
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182 // LIRItem
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183
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184 void LIRItem::set_result(LIR_Opr opr) {
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185 assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change");
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186 value()->set_operand(opr);
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187
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188 if (opr->is_virtual()) {
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189 _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL);
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190 }
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191
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192 _result = opr;
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193 }
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194
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195 void LIRItem::load_item() {
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196 if (result()->is_illegal()) {
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197 // update the items result
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198 _result = value()->operand();
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199 }
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200 if (!result()->is_register()) {
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201 LIR_Opr reg = _gen->new_register(value()->type());
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202 __ move(result(), reg);
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203 if (result()->is_constant()) {
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204 _result = reg;
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205 } else {
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206 set_result(reg);
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207 }
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208 }
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209 }
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210
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211
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212 void LIRItem::load_for_store(BasicType type) {
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213 if (_gen->can_store_as_constant(value(), type)) {
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214 _result = value()->operand();
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215 if (!_result->is_constant()) {
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216 _result = LIR_OprFact::value_type(value()->type());
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217 }
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218 } else if (type == T_BYTE || type == T_BOOLEAN) {
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219 load_byte_item();
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220 } else {
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221 load_item();
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222 }
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223 }
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224
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225 void LIRItem::load_item_force(LIR_Opr reg) {
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226 LIR_Opr r = result();
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227 if (r != reg) {
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228 if (r->type() != reg->type()) {
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229 // moves between different types need an intervening spill slot
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230 LIR_Opr tmp = _gen->force_to_spill(r, reg->type());
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231 __ move(tmp, reg);
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232 } else {
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233 __ move(r, reg);
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234 }
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235 _result = reg;
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236 }
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237 }
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238
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239 ciObject* LIRItem::get_jobject_constant() const {
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240 ObjectType* oc = type()->as_ObjectType();
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241 if (oc) {
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242 return oc->constant_value();
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243 }
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244 return NULL;
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245 }
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246
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247
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248 jint LIRItem::get_jint_constant() const {
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249 assert(is_constant() && value() != NULL, "");
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250 assert(type()->as_IntConstant() != NULL, "type check");
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251 return type()->as_IntConstant()->value();
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252 }
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253
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254
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255 jint LIRItem::get_address_constant() const {
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256 assert(is_constant() && value() != NULL, "");
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257 assert(type()->as_AddressConstant() != NULL, "type check");
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258 return type()->as_AddressConstant()->value();
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259 }
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260
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261
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262 jfloat LIRItem::get_jfloat_constant() const {
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263 assert(is_constant() && value() != NULL, "");
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264 assert(type()->as_FloatConstant() != NULL, "type check");
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265 return type()->as_FloatConstant()->value();
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266 }
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267
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268
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269 jdouble LIRItem::get_jdouble_constant() const {
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270 assert(is_constant() && value() != NULL, "");
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271 assert(type()->as_DoubleConstant() != NULL, "type check");
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272 return type()->as_DoubleConstant()->value();
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273 }
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274
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275
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276 jlong LIRItem::get_jlong_constant() const {
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277 assert(is_constant() && value() != NULL, "");
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278 assert(type()->as_LongConstant() != NULL, "type check");
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279 return type()->as_LongConstant()->value();
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280 }
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281
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282
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283
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284 //--------------------------------------------------------------
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285
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286
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287 void LIRGenerator::init() {
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288 _bs = Universe::heap()->barrier_set();
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289 }
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290
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291
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292 void LIRGenerator::block_do_prolog(BlockBegin* block) {
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293 #ifndef PRODUCT
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294 if (PrintIRWithLIR) {
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295 block->print();
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296 }
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297 #endif
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298
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299 // set up the list of LIR instructions
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300 assert(block->lir() == NULL, "LIR list already computed for this block");
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301 _lir = new LIR_List(compilation(), block);
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302 block->set_lir(_lir);
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303
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304 __ branch_destination(block->label());
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305
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306 if (LIRTraceExecution &&
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307 Compilation::current_compilation()->hir()->start()->block_id() != block->block_id() &&
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308 !block->is_set(BlockBegin::exception_entry_flag)) {
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309 assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst");
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310 trace_block_entry(block);
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311 }
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312 }
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313
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314
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315 void LIRGenerator::block_do_epilog(BlockBegin* block) {
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316 #ifndef PRODUCT
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317 if (PrintIRWithLIR) {
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318 tty->cr();
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319 }
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320 #endif
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321
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322 // LIR_Opr for unpinned constants shouldn't be referenced by other
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323 // blocks so clear them out after processing the block.
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324 for (int i = 0; i < _unpinned_constants.length(); i++) {
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325 _unpinned_constants.at(i)->clear_operand();
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326 }
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327 _unpinned_constants.trunc_to(0);
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328
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329 // clear our any registers for other local constants
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330 _constants.trunc_to(0);
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331 _reg_for_constants.trunc_to(0);
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332 }
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333
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334
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335 void LIRGenerator::block_do(BlockBegin* block) {
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336 CHECK_BAILOUT();
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337
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338 block_do_prolog(block);
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339 set_block(block);
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340
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341 for (Instruction* instr = block; instr != NULL; instr = instr->next()) {
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342 if (instr->is_pinned()) do_root(instr);
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343 }
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344
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345 set_block(NULL);
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346 block_do_epilog(block);
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347 }
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348
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349
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350 //-------------------------LIRGenerator-----------------------------
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351
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352 // This is where the tree-walk starts; instr must be root;
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353 void LIRGenerator::do_root(Value instr) {
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354 CHECK_BAILOUT();
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355
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356 InstructionMark im(compilation(), instr);
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357
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358 assert(instr->is_pinned(), "use only with roots");
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359 assert(instr->subst() == instr, "shouldn't have missed substitution");
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360
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361 instr->visit(this);
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362
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363 assert(!instr->has_uses() || instr->operand()->is_valid() ||
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364 instr->as_Constant() != NULL || bailed_out(), "invalid item set");
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365 }
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366
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367
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368 // This is called for each node in tree; the walk stops if a root is reached
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369 void LIRGenerator::walk(Value instr) {
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370 InstructionMark im(compilation(), instr);
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371 //stop walk when encounter a root
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372 if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) {
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373 assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited");
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374 } else {
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375 assert(instr->subst() == instr, "shouldn't have missed substitution");
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376 instr->visit(this);
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377 // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use");
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378 }
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379 }
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380
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381
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382 CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) {
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383 int index;
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384 Value value;
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385 for_each_stack_value(state, index, value) {
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386 assert(value->subst() == value, "missed substition");
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387 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
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388 walk(value);
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389 assert(value->operand()->is_valid(), "must be evaluated now");
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390 }
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391 }
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392 ValueStack* s = state;
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393 int bci = x->bci();
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394 for_each_state(s) {
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395 IRScope* scope = s->scope();
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396 ciMethod* method = scope->method();
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397
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398 MethodLivenessResult liveness = method->liveness_at_bci(bci);
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399 if (bci == SynchronizationEntryBCI) {
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400 if (x->as_ExceptionObject() || x->as_Throw()) {
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401 // all locals are dead on exit from the synthetic unlocker
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402 liveness.clear();
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403 } else {
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404 assert(x->as_MonitorEnter(), "only other case is MonitorEnter");
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405 }
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406 }
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407 if (!liveness.is_valid()) {
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408 // Degenerate or breakpointed method.
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409 bailout("Degenerate or breakpointed method");
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410 } else {
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411 assert((int)liveness.size() == s->locals_size(), "error in use of liveness");
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412 for_each_local_value(s, index, value) {
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413 assert(value->subst() == value, "missed substition");
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414 if (liveness.at(index) && !value->type()->is_illegal()) {
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415 if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) {
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416 walk(value);
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417 assert(value->operand()->is_valid(), "must be evaluated now");
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418 }
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419 } else {
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420 // NULL out this local so that linear scan can assume that all non-NULL values are live.
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421 s->invalidate_local(index);
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422 }
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423 }
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424 }
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425 bci = scope->caller_bci();
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426 }
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427
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428 return new CodeEmitInfo(x->bci(), state, ignore_xhandler ? NULL : x->exception_handlers());
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429 }
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430
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431
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432 CodeEmitInfo* LIRGenerator::state_for(Instruction* x) {
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433 return state_for(x, x->lock_stack());
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434 }
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435
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436
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437 void LIRGenerator::jobject2reg_with_patching(LIR_Opr r, ciObject* obj, CodeEmitInfo* info) {
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438 if (!obj->is_loaded() || PatchALot) {
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439 assert(info != NULL, "info must be set if class is not loaded");
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440 __ oop2reg_patch(NULL, r, info);
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441 } else {
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442 // no patching needed
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443 __ oop2reg(obj->encoding(), r);
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444 }
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445 }
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446
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447
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448 void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index,
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449 CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) {
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450 CodeStub* stub = new RangeCheckStub(range_check_info, index);
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451 if (index->is_constant()) {
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452 cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(),
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453 index->as_jint(), null_check_info);
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454 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
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455 } else {
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456 cmp_reg_mem(lir_cond_aboveEqual, index, array,
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457 arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info);
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458 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
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459 }
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460 }
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461
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462
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463 void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
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464 CodeStub* stub = new RangeCheckStub(info, index, true);
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465 if (index->is_constant()) {
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466 cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info);
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467 __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch
|
|
468 } else {
|
|
469 cmp_reg_mem(lir_cond_aboveEqual, index, buffer,
|
|
470 java_nio_Buffer::limit_offset(), T_INT, info);
|
|
471 __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch
|
|
472 }
|
|
473 __ move(index, result);
|
|
474 }
|
|
475
|
|
476
|
|
477 // increment a counter returning the incremented value
|
|
478 LIR_Opr LIRGenerator::increment_and_return_counter(LIR_Opr base, int offset, int increment) {
|
|
479 LIR_Address* counter = new LIR_Address(base, offset, T_INT);
|
|
480 LIR_Opr result = new_register(T_INT);
|
|
481 __ load(counter, result);
|
|
482 __ add(result, LIR_OprFact::intConst(increment), result);
|
|
483 __ store(result, counter);
|
|
484 return result;
|
|
485 }
|
|
486
|
|
487
|
|
488 void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp_op, CodeEmitInfo* info) {
|
|
489 LIR_Opr result_op = result;
|
|
490 LIR_Opr left_op = left;
|
|
491 LIR_Opr right_op = right;
|
|
492
|
|
493 if (TwoOperandLIRForm && left_op != result_op) {
|
|
494 assert(right_op != result_op, "malformed");
|
|
495 __ move(left_op, result_op);
|
|
496 left_op = result_op;
|
|
497 }
|
|
498
|
|
499 switch(code) {
|
|
500 case Bytecodes::_dadd:
|
|
501 case Bytecodes::_fadd:
|
|
502 case Bytecodes::_ladd:
|
|
503 case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break;
|
|
504 case Bytecodes::_fmul:
|
|
505 case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break;
|
|
506
|
|
507 case Bytecodes::_dmul:
|
|
508 {
|
|
509 if (is_strictfp) {
|
|
510 __ mul_strictfp(left_op, right_op, result_op, tmp_op); break;
|
|
511 } else {
|
|
512 __ mul(left_op, right_op, result_op); break;
|
|
513 }
|
|
514 }
|
|
515 break;
|
|
516
|
|
517 case Bytecodes::_imul:
|
|
518 {
|
|
519 bool did_strength_reduce = false;
|
|
520
|
|
521 if (right->is_constant()) {
|
|
522 int c = right->as_jint();
|
|
523 if (is_power_of_2(c)) {
|
|
524 // do not need tmp here
|
|
525 __ shift_left(left_op, exact_log2(c), result_op);
|
|
526 did_strength_reduce = true;
|
|
527 } else {
|
|
528 did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op);
|
|
529 }
|
|
530 }
|
|
531 // we couldn't strength reduce so just emit the multiply
|
|
532 if (!did_strength_reduce) {
|
|
533 __ mul(left_op, right_op, result_op);
|
|
534 }
|
|
535 }
|
|
536 break;
|
|
537
|
|
538 case Bytecodes::_dsub:
|
|
539 case Bytecodes::_fsub:
|
|
540 case Bytecodes::_lsub:
|
|
541 case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break;
|
|
542
|
|
543 case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break;
|
|
544 // ldiv and lrem are implemented with a direct runtime call
|
|
545
|
|
546 case Bytecodes::_ddiv:
|
|
547 {
|
|
548 if (is_strictfp) {
|
|
549 __ div_strictfp (left_op, right_op, result_op, tmp_op); break;
|
|
550 } else {
|
|
551 __ div (left_op, right_op, result_op); break;
|
|
552 }
|
|
553 }
|
|
554 break;
|
|
555
|
|
556 case Bytecodes::_drem:
|
|
557 case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break;
|
|
558
|
|
559 default: ShouldNotReachHere();
|
|
560 }
|
|
561 }
|
|
562
|
|
563
|
|
564 void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) {
|
|
565 arithmetic_op(code, result, left, right, false, tmp);
|
|
566 }
|
|
567
|
|
568
|
|
569 void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
|
|
570 arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info);
|
|
571 }
|
|
572
|
|
573
|
|
574 void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) {
|
|
575 arithmetic_op(code, result, left, right, is_strictfp, tmp);
|
|
576 }
|
|
577
|
|
578
|
|
579 void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) {
|
|
580 if (TwoOperandLIRForm && value != result_op) {
|
|
581 assert(count != result_op, "malformed");
|
|
582 __ move(value, result_op);
|
|
583 value = result_op;
|
|
584 }
|
|
585
|
|
586 assert(count->is_constant() || count->is_register(), "must be");
|
|
587 switch(code) {
|
|
588 case Bytecodes::_ishl:
|
|
589 case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break;
|
|
590 case Bytecodes::_ishr:
|
|
591 case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break;
|
|
592 case Bytecodes::_iushr:
|
|
593 case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break;
|
|
594 default: ShouldNotReachHere();
|
|
595 }
|
|
596 }
|
|
597
|
|
598
|
|
599 void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) {
|
|
600 if (TwoOperandLIRForm && left_op != result_op) {
|
|
601 assert(right_op != result_op, "malformed");
|
|
602 __ move(left_op, result_op);
|
|
603 left_op = result_op;
|
|
604 }
|
|
605
|
|
606 switch(code) {
|
|
607 case Bytecodes::_iand:
|
|
608 case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break;
|
|
609
|
|
610 case Bytecodes::_ior:
|
|
611 case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break;
|
|
612
|
|
613 case Bytecodes::_ixor:
|
|
614 case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break;
|
|
615
|
|
616 default: ShouldNotReachHere();
|
|
617 }
|
|
618 }
|
|
619
|
|
620
|
|
621 void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info) {
|
|
622 if (!GenerateSynchronizationCode) return;
|
|
623 // for slow path, use debug info for state after successful locking
|
|
624 CodeStub* slow_path = new MonitorEnterStub(object, lock, info);
|
|
625 __ load_stack_address_monitor(monitor_no, lock);
|
|
626 // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter
|
|
627 __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception);
|
|
628 }
|
|
629
|
|
630
|
|
631 void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, int monitor_no) {
|
|
632 if (!GenerateSynchronizationCode) return;
|
|
633 // setup registers
|
|
634 LIR_Opr hdr = lock;
|
|
635 lock = new_hdr;
|
|
636 CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no);
|
|
637 __ load_stack_address_monitor(monitor_no, lock);
|
|
638 __ unlock_object(hdr, object, lock, slow_path);
|
|
639 }
|
|
640
|
|
641
|
|
642 void LIRGenerator::new_instance(LIR_Opr dst, ciInstanceKlass* klass, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info) {
|
|
643 jobject2reg_with_patching(klass_reg, klass, info);
|
|
644 // If klass is not loaded we do not know if the klass has finalizers:
|
|
645 if (UseFastNewInstance && klass->is_loaded()
|
|
646 && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) {
|
|
647
|
|
648 Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id;
|
|
649
|
|
650 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id);
|
|
651
|
|
652 assert(klass->is_loaded(), "must be loaded");
|
|
653 // allocate space for instance
|
|
654 assert(klass->size_helper() >= 0, "illegal instance size");
|
|
655 const int instance_size = align_object_size(klass->size_helper());
|
|
656 __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4,
|
|
657 oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path);
|
|
658 } else {
|
|
659 CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id);
|
|
660 __ branch(lir_cond_always, T_ILLEGAL, slow_path);
|
|
661 __ branch_destination(slow_path->continuation());
|
|
662 }
|
|
663 }
|
|
664
|
|
665
|
|
666 static bool is_constant_zero(Instruction* inst) {
|
|
667 IntConstant* c = inst->type()->as_IntConstant();
|
|
668 if (c) {
|
|
669 return (c->value() == 0);
|
|
670 }
|
|
671 return false;
|
|
672 }
|
|
673
|
|
674
|
|
675 static bool positive_constant(Instruction* inst) {
|
|
676 IntConstant* c = inst->type()->as_IntConstant();
|
|
677 if (c) {
|
|
678 return (c->value() >= 0);
|
|
679 }
|
|
680 return false;
|
|
681 }
|
|
682
|
|
683
|
|
684 static ciArrayKlass* as_array_klass(ciType* type) {
|
|
685 if (type != NULL && type->is_array_klass() && type->is_loaded()) {
|
|
686 return (ciArrayKlass*)type;
|
|
687 } else {
|
|
688 return NULL;
|
|
689 }
|
|
690 }
|
|
691
|
|
692 void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) {
|
|
693 Instruction* src = x->argument_at(0);
|
|
694 Instruction* src_pos = x->argument_at(1);
|
|
695 Instruction* dst = x->argument_at(2);
|
|
696 Instruction* dst_pos = x->argument_at(3);
|
|
697 Instruction* length = x->argument_at(4);
|
|
698
|
|
699 // first try to identify the likely type of the arrays involved
|
|
700 ciArrayKlass* expected_type = NULL;
|
|
701 bool is_exact = false;
|
|
702 {
|
|
703 ciArrayKlass* src_exact_type = as_array_klass(src->exact_type());
|
|
704 ciArrayKlass* src_declared_type = as_array_klass(src->declared_type());
|
|
705 ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type());
|
|
706 ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type());
|
|
707 if (src_exact_type != NULL && src_exact_type == dst_exact_type) {
|
|
708 // the types exactly match so the type is fully known
|
|
709 is_exact = true;
|
|
710 expected_type = src_exact_type;
|
|
711 } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) {
|
|
712 ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type;
|
|
713 ciArrayKlass* src_type = NULL;
|
|
714 if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) {
|
|
715 src_type = (ciArrayKlass*) src_exact_type;
|
|
716 } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) {
|
|
717 src_type = (ciArrayKlass*) src_declared_type;
|
|
718 }
|
|
719 if (src_type != NULL) {
|
|
720 if (src_type->element_type()->is_subtype_of(dst_type->element_type())) {
|
|
721 is_exact = true;
|
|
722 expected_type = dst_type;
|
|
723 }
|
|
724 }
|
|
725 }
|
|
726 // at least pass along a good guess
|
|
727 if (expected_type == NULL) expected_type = dst_exact_type;
|
|
728 if (expected_type == NULL) expected_type = src_declared_type;
|
|
729 if (expected_type == NULL) expected_type = dst_declared_type;
|
|
730 }
|
|
731
|
|
732 // if a probable array type has been identified, figure out if any
|
|
733 // of the required checks for a fast case can be elided.
|
|
734 int flags = LIR_OpArrayCopy::all_flags;
|
|
735 if (expected_type != NULL) {
|
|
736 // try to skip null checks
|
|
737 if (src->as_NewArray() != NULL)
|
|
738 flags &= ~LIR_OpArrayCopy::src_null_check;
|
|
739 if (dst->as_NewArray() != NULL)
|
|
740 flags &= ~LIR_OpArrayCopy::dst_null_check;
|
|
741
|
|
742 // check from incoming constant values
|
|
743 if (positive_constant(src_pos))
|
|
744 flags &= ~LIR_OpArrayCopy::src_pos_positive_check;
|
|
745 if (positive_constant(dst_pos))
|
|
746 flags &= ~LIR_OpArrayCopy::dst_pos_positive_check;
|
|
747 if (positive_constant(length))
|
|
748 flags &= ~LIR_OpArrayCopy::length_positive_check;
|
|
749
|
|
750 // see if the range check can be elided, which might also imply
|
|
751 // that src or dst is non-null.
|
|
752 ArrayLength* al = length->as_ArrayLength();
|
|
753 if (al != NULL) {
|
|
754 if (al->array() == src) {
|
|
755 // it's the length of the source array
|
|
756 flags &= ~LIR_OpArrayCopy::length_positive_check;
|
|
757 flags &= ~LIR_OpArrayCopy::src_null_check;
|
|
758 if (is_constant_zero(src_pos))
|
|
759 flags &= ~LIR_OpArrayCopy::src_range_check;
|
|
760 }
|
|
761 if (al->array() == dst) {
|
|
762 // it's the length of the destination array
|
|
763 flags &= ~LIR_OpArrayCopy::length_positive_check;
|
|
764 flags &= ~LIR_OpArrayCopy::dst_null_check;
|
|
765 if (is_constant_zero(dst_pos))
|
|
766 flags &= ~LIR_OpArrayCopy::dst_range_check;
|
|
767 }
|
|
768 }
|
|
769 if (is_exact) {
|
|
770 flags &= ~LIR_OpArrayCopy::type_check;
|
|
771 }
|
|
772 }
|
|
773
|
|
774 if (src == dst) {
|
|
775 // moving within a single array so no type checks are needed
|
|
776 if (flags & LIR_OpArrayCopy::type_check) {
|
|
777 flags &= ~LIR_OpArrayCopy::type_check;
|
|
778 }
|
|
779 }
|
|
780 *flagsp = flags;
|
|
781 *expected_typep = (ciArrayKlass*)expected_type;
|
|
782 }
|
|
783
|
|
784
|
|
785 LIR_Opr LIRGenerator::round_item(LIR_Opr opr) {
|
|
786 assert(opr->is_register(), "why spill if item is not register?");
|
|
787
|
|
788 if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) {
|
|
789 LIR_Opr result = new_register(T_FLOAT);
|
|
790 set_vreg_flag(result, must_start_in_memory);
|
|
791 assert(opr->is_register(), "only a register can be spilled");
|
|
792 assert(opr->value_type()->is_float(), "rounding only for floats available");
|
|
793 __ roundfp(opr, LIR_OprFact::illegalOpr, result);
|
|
794 return result;
|
|
795 }
|
|
796 return opr;
|
|
797 }
|
|
798
|
|
799
|
|
800 LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) {
|
|
801 assert(type2size[t] == type2size[value->type()], "size mismatch");
|
|
802 if (!value->is_register()) {
|
|
803 // force into a register
|
|
804 LIR_Opr r = new_register(value->type());
|
|
805 __ move(value, r);
|
|
806 value = r;
|
|
807 }
|
|
808
|
|
809 // create a spill location
|
|
810 LIR_Opr tmp = new_register(t);
|
|
811 set_vreg_flag(tmp, LIRGenerator::must_start_in_memory);
|
|
812
|
|
813 // move from register to spill
|
|
814 __ move(value, tmp);
|
|
815 return tmp;
|
|
816 }
|
|
817
|
|
818
|
|
819 void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) {
|
|
820 if (if_instr->should_profile()) {
|
|
821 ciMethod* method = if_instr->profiled_method();
|
|
822 assert(method != NULL, "method should be set if branch is profiled");
|
|
823 ciMethodData* md = method->method_data();
|
|
824 if (md == NULL) {
|
|
825 bailout("out of memory building methodDataOop");
|
|
826 return;
|
|
827 }
|
|
828 ciProfileData* data = md->bci_to_data(if_instr->profiled_bci());
|
|
829 assert(data != NULL, "must have profiling data");
|
|
830 assert(data->is_BranchData(), "need BranchData for two-way branches");
|
|
831 int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset());
|
|
832 int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset());
|
|
833 LIR_Opr md_reg = new_register(T_OBJECT);
|
|
834 __ move(LIR_OprFact::oopConst(md->encoding()), md_reg);
|
|
835 LIR_Opr data_offset_reg = new_register(T_INT);
|
|
836 __ cmove(lir_cond(cond),
|
|
837 LIR_OprFact::intConst(taken_count_offset),
|
|
838 LIR_OprFact::intConst(not_taken_count_offset),
|
|
839 data_offset_reg);
|
|
840 LIR_Opr data_reg = new_register(T_INT);
|
|
841 LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, T_INT);
|
|
842 __ move(LIR_OprFact::address(data_addr), data_reg);
|
|
843 LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT);
|
|
844 // Use leal instead of add to avoid destroying condition codes on x86
|
|
845 __ leal(LIR_OprFact::address(fake_incr_value), data_reg);
|
|
846 __ move(data_reg, LIR_OprFact::address(data_addr));
|
|
847 }
|
|
848 }
|
|
849
|
|
850
|
|
851 // Phi technique:
|
|
852 // This is about passing live values from one basic block to the other.
|
|
853 // In code generated with Java it is rather rare that more than one
|
|
854 // value is on the stack from one basic block to the other.
|
|
855 // We optimize our technique for efficient passing of one value
|
|
856 // (of type long, int, double..) but it can be extended.
|
|
857 // When entering or leaving a basic block, all registers and all spill
|
|
858 // slots are release and empty. We use the released registers
|
|
859 // and spill slots to pass the live values from one block
|
|
860 // to the other. The topmost value, i.e., the value on TOS of expression
|
|
861 // stack is passed in registers. All other values are stored in spilling
|
|
862 // area. Every Phi has an index which designates its spill slot
|
|
863 // At exit of a basic block, we fill the register(s) and spill slots.
|
|
864 // At entry of a basic block, the block_prolog sets up the content of phi nodes
|
|
865 // and locks necessary registers and spilling slots.
|
|
866
|
|
867
|
|
868 // move current value to referenced phi function
|
|
869 void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) {
|
|
870 Phi* phi = sux_val->as_Phi();
|
|
871 // cur_val can be null without phi being null in conjunction with inlining
|
|
872 if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) {
|
|
873 LIR_Opr operand = cur_val->operand();
|
|
874 if (cur_val->operand()->is_illegal()) {
|
|
875 assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL,
|
|
876 "these can be produced lazily");
|
|
877 operand = operand_for_instruction(cur_val);
|
|
878 }
|
|
879 resolver->move(operand, operand_for_instruction(phi));
|
|
880 }
|
|
881 }
|
|
882
|
|
883
|
|
884 // Moves all stack values into their PHI position
|
|
885 void LIRGenerator::move_to_phi(ValueStack* cur_state) {
|
|
886 BlockBegin* bb = block();
|
|
887 if (bb->number_of_sux() == 1) {
|
|
888 BlockBegin* sux = bb->sux_at(0);
|
|
889 assert(sux->number_of_preds() > 0, "invalid CFG");
|
|
890
|
|
891 // a block with only one predecessor never has phi functions
|
|
892 if (sux->number_of_preds() > 1) {
|
|
893 int max_phis = cur_state->stack_size() + cur_state->locals_size();
|
|
894 PhiResolver resolver(this, _virtual_register_number + max_phis * 2);
|
|
895
|
|
896 ValueStack* sux_state = sux->state();
|
|
897 Value sux_value;
|
|
898 int index;
|
|
899
|
|
900 for_each_stack_value(sux_state, index, sux_value) {
|
|
901 move_to_phi(&resolver, cur_state->stack_at(index), sux_value);
|
|
902 }
|
|
903
|
|
904 // Inlining may cause the local state not to match up, so walk up
|
|
905 // the caller state until we get to the same scope as the
|
|
906 // successor and then start processing from there.
|
|
907 while (cur_state->scope() != sux_state->scope()) {
|
|
908 cur_state = cur_state->caller_state();
|
|
909 assert(cur_state != NULL, "scopes don't match up");
|
|
910 }
|
|
911
|
|
912 for_each_local_value(sux_state, index, sux_value) {
|
|
913 move_to_phi(&resolver, cur_state->local_at(index), sux_value);
|
|
914 }
|
|
915
|
|
916 assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal");
|
|
917 }
|
|
918 }
|
|
919 }
|
|
920
|
|
921
|
|
922 LIR_Opr LIRGenerator::new_register(BasicType type) {
|
|
923 int vreg = _virtual_register_number;
|
|
924 // add a little fudge factor for the bailout, since the bailout is
|
|
925 // only checked periodically. This gives a few extra registers to
|
|
926 // hand out before we really run out, which helps us keep from
|
|
927 // tripping over assertions.
|
|
928 if (vreg + 20 >= LIR_OprDesc::vreg_max) {
|
|
929 bailout("out of virtual registers");
|
|
930 if (vreg + 2 >= LIR_OprDesc::vreg_max) {
|
|
931 // wrap it around
|
|
932 _virtual_register_number = LIR_OprDesc::vreg_base;
|
|
933 }
|
|
934 }
|
|
935 _virtual_register_number += 1;
|
|
936 if (type == T_ADDRESS) type = T_INT;
|
|
937 return LIR_OprFact::virtual_register(vreg, type);
|
|
938 }
|
|
939
|
|
940
|
|
941 // Try to lock using register in hint
|
|
942 LIR_Opr LIRGenerator::rlock(Value instr) {
|
|
943 return new_register(instr->type());
|
|
944 }
|
|
945
|
|
946
|
|
947 // does an rlock and sets result
|
|
948 LIR_Opr LIRGenerator::rlock_result(Value x) {
|
|
949 LIR_Opr reg = rlock(x);
|
|
950 set_result(x, reg);
|
|
951 return reg;
|
|
952 }
|
|
953
|
|
954
|
|
955 // does an rlock and sets result
|
|
956 LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) {
|
|
957 LIR_Opr reg;
|
|
958 switch (type) {
|
|
959 case T_BYTE:
|
|
960 case T_BOOLEAN:
|
|
961 reg = rlock_byte(type);
|
|
962 break;
|
|
963 default:
|
|
964 reg = rlock(x);
|
|
965 break;
|
|
966 }
|
|
967
|
|
968 set_result(x, reg);
|
|
969 return reg;
|
|
970 }
|
|
971
|
|
972
|
|
973 //---------------------------------------------------------------------
|
|
974 ciObject* LIRGenerator::get_jobject_constant(Value value) {
|
|
975 ObjectType* oc = value->type()->as_ObjectType();
|
|
976 if (oc) {
|
|
977 return oc->constant_value();
|
|
978 }
|
|
979 return NULL;
|
|
980 }
|
|
981
|
|
982
|
|
983 void LIRGenerator::do_ExceptionObject(ExceptionObject* x) {
|
|
984 assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block");
|
|
985 assert(block()->next() == x, "ExceptionObject must be first instruction of block");
|
|
986
|
|
987 // no moves are created for phi functions at the begin of exception
|
|
988 // handlers, so assign operands manually here
|
|
989 for_each_phi_fun(block(), phi,
|
|
990 operand_for_instruction(phi));
|
|
991
|
|
992 LIR_Opr thread_reg = getThreadPointer();
|
|
993 __ move(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT),
|
|
994 exceptionOopOpr());
|
|
995 __ move(LIR_OprFact::oopConst(NULL),
|
|
996 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT));
|
|
997 __ move(LIR_OprFact::oopConst(NULL),
|
|
998 new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT));
|
|
999
|
|
1000 LIR_Opr result = new_register(T_OBJECT);
|
|
1001 __ move(exceptionOopOpr(), result);
|
|
1002 set_result(x, result);
|
|
1003 }
|
|
1004
|
|
1005
|
|
1006 //----------------------------------------------------------------------
|
|
1007 //----------------------------------------------------------------------
|
|
1008 //----------------------------------------------------------------------
|
|
1009 //----------------------------------------------------------------------
|
|
1010 // visitor functions
|
|
1011 //----------------------------------------------------------------------
|
|
1012 //----------------------------------------------------------------------
|
|
1013 //----------------------------------------------------------------------
|
|
1014 //----------------------------------------------------------------------
|
|
1015
|
|
1016 void LIRGenerator::do_Phi(Phi* x) {
|
|
1017 // phi functions are never visited directly
|
|
1018 ShouldNotReachHere();
|
|
1019 }
|
|
1020
|
|
1021
|
|
1022 // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined.
|
|
1023 void LIRGenerator::do_Constant(Constant* x) {
|
|
1024 if (x->state() != NULL) {
|
|
1025 // Any constant with a ValueStack requires patching so emit the patch here
|
|
1026 LIR_Opr reg = rlock_result(x);
|
|
1027 CodeEmitInfo* info = state_for(x, x->state());
|
|
1028 __ oop2reg_patch(NULL, reg, info);
|
|
1029 } else if (x->use_count() > 1 && !can_inline_as_constant(x)) {
|
|
1030 if (!x->is_pinned()) {
|
|
1031 // unpinned constants are handled specially so that they can be
|
|
1032 // put into registers when they are used multiple times within a
|
|
1033 // block. After the block completes their operand will be
|
|
1034 // cleared so that other blocks can't refer to that register.
|
|
1035 set_result(x, load_constant(x));
|
|
1036 } else {
|
|
1037 LIR_Opr res = x->operand();
|
|
1038 if (!res->is_valid()) {
|
|
1039 res = LIR_OprFact::value_type(x->type());
|
|
1040 }
|
|
1041 if (res->is_constant()) {
|
|
1042 LIR_Opr reg = rlock_result(x);
|
|
1043 __ move(res, reg);
|
|
1044 } else {
|
|
1045 set_result(x, res);
|
|
1046 }
|
|
1047 }
|
|
1048 } else {
|
|
1049 set_result(x, LIR_OprFact::value_type(x->type()));
|
|
1050 }
|
|
1051 }
|
|
1052
|
|
1053
|
|
1054 void LIRGenerator::do_Local(Local* x) {
|
|
1055 // operand_for_instruction has the side effect of setting the result
|
|
1056 // so there's no need to do it here.
|
|
1057 operand_for_instruction(x);
|
|
1058 }
|
|
1059
|
|
1060
|
|
1061 void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) {
|
|
1062 Unimplemented();
|
|
1063 }
|
|
1064
|
|
1065
|
|
1066 void LIRGenerator::do_Return(Return* x) {
|
|
1067 if (DTraceMethodProbes) {
|
|
1068 BasicTypeList signature;
|
|
1069 signature.append(T_INT); // thread
|
|
1070 signature.append(T_OBJECT); // methodOop
|
|
1071 LIR_OprList* args = new LIR_OprList();
|
|
1072 args->append(getThreadPointer());
|
|
1073 LIR_Opr meth = new_register(T_OBJECT);
|
|
1074 __ oop2reg(method()->encoding(), meth);
|
|
1075 args->append(meth);
|
|
1076 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
|
|
1077 }
|
|
1078
|
|
1079 if (x->type()->is_void()) {
|
|
1080 __ return_op(LIR_OprFact::illegalOpr);
|
|
1081 } else {
|
|
1082 LIR_Opr reg = result_register_for(x->type(), /*callee=*/true);
|
|
1083 LIRItem result(x->result(), this);
|
|
1084
|
|
1085 result.load_item_force(reg);
|
|
1086 __ return_op(result.result());
|
|
1087 }
|
|
1088 set_no_result(x);
|
|
1089 }
|
|
1090
|
|
1091
|
|
1092 // Example: object.getClass ()
|
|
1093 void LIRGenerator::do_getClass(Intrinsic* x) {
|
|
1094 assert(x->number_of_arguments() == 1, "wrong type");
|
|
1095
|
|
1096 LIRItem rcvr(x->argument_at(0), this);
|
|
1097 rcvr.load_item();
|
|
1098 LIR_Opr result = rlock_result(x);
|
|
1099
|
|
1100 // need to perform the null check on the rcvr
|
|
1101 CodeEmitInfo* info = NULL;
|
|
1102 if (x->needs_null_check()) {
|
|
1103 info = state_for(x, x->state()->copy_locks());
|
|
1104 }
|
|
1105 __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_OBJECT), result, info);
|
|
1106 __ move(new LIR_Address(result, Klass::java_mirror_offset_in_bytes() +
|
|
1107 klassOopDesc::klass_part_offset_in_bytes(), T_OBJECT), result);
|
|
1108 }
|
|
1109
|
|
1110
|
|
1111 // Example: Thread.currentThread()
|
|
1112 void LIRGenerator::do_currentThread(Intrinsic* x) {
|
|
1113 assert(x->number_of_arguments() == 0, "wrong type");
|
|
1114 LIR_Opr reg = rlock_result(x);
|
|
1115 __ load(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg);
|
|
1116 }
|
|
1117
|
|
1118
|
|
1119 void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) {
|
|
1120 assert(x->number_of_arguments() == 1, "wrong type");
|
|
1121 LIRItem receiver(x->argument_at(0), this);
|
|
1122
|
|
1123 receiver.load_item();
|
|
1124 BasicTypeList signature;
|
|
1125 signature.append(T_OBJECT); // receiver
|
|
1126 LIR_OprList* args = new LIR_OprList();
|
|
1127 args->append(receiver.result());
|
|
1128 CodeEmitInfo* info = state_for(x, x->state());
|
|
1129 call_runtime(&signature, args,
|
|
1130 CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)),
|
|
1131 voidType, info);
|
|
1132
|
|
1133 set_no_result(x);
|
|
1134 }
|
|
1135
|
|
1136
|
|
1137 //------------------------local access--------------------------------------
|
|
1138
|
|
1139 LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) {
|
|
1140 if (x->operand()->is_illegal()) {
|
|
1141 Constant* c = x->as_Constant();
|
|
1142 if (c != NULL) {
|
|
1143 x->set_operand(LIR_OprFact::value_type(c->type()));
|
|
1144 } else {
|
|
1145 assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local");
|
|
1146 // allocate a virtual register for this local or phi
|
|
1147 x->set_operand(rlock(x));
|
|
1148 _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL);
|
|
1149 }
|
|
1150 }
|
|
1151 return x->operand();
|
|
1152 }
|
|
1153
|
|
1154
|
|
1155 Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) {
|
|
1156 if (opr->is_virtual()) {
|
|
1157 return instruction_for_vreg(opr->vreg_number());
|
|
1158 }
|
|
1159 return NULL;
|
|
1160 }
|
|
1161
|
|
1162
|
|
1163 Instruction* LIRGenerator::instruction_for_vreg(int reg_num) {
|
|
1164 if (reg_num < _instruction_for_operand.length()) {
|
|
1165 return _instruction_for_operand.at(reg_num);
|
|
1166 }
|
|
1167 return NULL;
|
|
1168 }
|
|
1169
|
|
1170
|
|
1171 void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) {
|
|
1172 if (_vreg_flags.size_in_bits() == 0) {
|
|
1173 BitMap2D temp(100, num_vreg_flags);
|
|
1174 temp.clear();
|
|
1175 _vreg_flags = temp;
|
|
1176 }
|
|
1177 _vreg_flags.at_put_grow(vreg_num, f, true);
|
|
1178 }
|
|
1179
|
|
1180 bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) {
|
|
1181 if (!_vreg_flags.is_valid_index(vreg_num, f)) {
|
|
1182 return false;
|
|
1183 }
|
|
1184 return _vreg_flags.at(vreg_num, f);
|
|
1185 }
|
|
1186
|
|
1187
|
|
1188 // Block local constant handling. This code is useful for keeping
|
|
1189 // unpinned constants and constants which aren't exposed in the IR in
|
|
1190 // registers. Unpinned Constant instructions have their operands
|
|
1191 // cleared when the block is finished so that other blocks can't end
|
|
1192 // up referring to their registers.
|
|
1193
|
|
1194 LIR_Opr LIRGenerator::load_constant(Constant* x) {
|
|
1195 assert(!x->is_pinned(), "only for unpinned constants");
|
|
1196 _unpinned_constants.append(x);
|
|
1197 return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr());
|
|
1198 }
|
|
1199
|
|
1200
|
|
1201 LIR_Opr LIRGenerator::load_constant(LIR_Const* c) {
|
|
1202 BasicType t = c->type();
|
|
1203 for (int i = 0; i < _constants.length(); i++) {
|
|
1204 LIR_Const* other = _constants.at(i);
|
|
1205 if (t == other->type()) {
|
|
1206 switch (t) {
|
|
1207 case T_INT:
|
|
1208 case T_FLOAT:
|
|
1209 if (c->as_jint_bits() != other->as_jint_bits()) continue;
|
|
1210 break;
|
|
1211 case T_LONG:
|
|
1212 case T_DOUBLE:
|
|
1213 if (c->as_jint_hi_bits() != other->as_jint_lo_bits()) continue;
|
|
1214 if (c->as_jint_lo_bits() != other->as_jint_hi_bits()) continue;
|
|
1215 break;
|
|
1216 case T_OBJECT:
|
|
1217 if (c->as_jobject() != other->as_jobject()) continue;
|
|
1218 break;
|
|
1219 }
|
|
1220 return _reg_for_constants.at(i);
|
|
1221 }
|
|
1222 }
|
|
1223
|
|
1224 LIR_Opr result = new_register(t);
|
|
1225 __ move((LIR_Opr)c, result);
|
|
1226 _constants.append(c);
|
|
1227 _reg_for_constants.append(result);
|
|
1228 return result;
|
|
1229 }
|
|
1230
|
|
1231 // Various barriers
|
|
1232
|
342
|
1233 void LIRGenerator::pre_barrier(LIR_Opr addr_opr, bool patch, CodeEmitInfo* info) {
|
|
1234 // Do the pre-write barrier, if any.
|
|
1235 switch (_bs->kind()) {
|
|
1236 #ifndef SERIALGC
|
|
1237 case BarrierSet::G1SATBCT:
|
|
1238 case BarrierSet::G1SATBCTLogging:
|
|
1239 G1SATBCardTableModRef_pre_barrier(addr_opr, patch, info);
|
|
1240 break;
|
|
1241 #endif // SERIALGC
|
|
1242 case BarrierSet::CardTableModRef:
|
|
1243 case BarrierSet::CardTableExtension:
|
|
1244 // No pre barriers
|
|
1245 break;
|
|
1246 case BarrierSet::ModRef:
|
|
1247 case BarrierSet::Other:
|
|
1248 // No pre barriers
|
|
1249 break;
|
|
1250 default :
|
|
1251 ShouldNotReachHere();
|
|
1252
|
|
1253 }
|
|
1254 }
|
|
1255
|
0
|
1256 void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
|
342
|
1257 switch (_bs->kind()) {
|
|
1258 #ifndef SERIALGC
|
|
1259 case BarrierSet::G1SATBCT:
|
|
1260 case BarrierSet::G1SATBCTLogging:
|
|
1261 G1SATBCardTableModRef_post_barrier(addr, new_val);
|
|
1262 break;
|
|
1263 #endif // SERIALGC
|
0
|
1264 case BarrierSet::CardTableModRef:
|
|
1265 case BarrierSet::CardTableExtension:
|
|
1266 CardTableModRef_post_barrier(addr, new_val);
|
|
1267 break;
|
|
1268 case BarrierSet::ModRef:
|
|
1269 case BarrierSet::Other:
|
|
1270 // No post barriers
|
|
1271 break;
|
|
1272 default :
|
|
1273 ShouldNotReachHere();
|
|
1274 }
|
|
1275 }
|
|
1276
|
342
|
1277 ////////////////////////////////////////////////////////////////////////
|
|
1278 #ifndef SERIALGC
|
|
1279
|
|
1280 void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, bool patch, CodeEmitInfo* info) {
|
|
1281 if (G1DisablePreBarrier) return;
|
|
1282
|
|
1283 // First we test whether marking is in progress.
|
|
1284 BasicType flag_type;
|
|
1285 if (in_bytes(PtrQueue::byte_width_of_active()) == 4) {
|
|
1286 flag_type = T_INT;
|
|
1287 } else {
|
|
1288 guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1,
|
|
1289 "Assumption");
|
|
1290 flag_type = T_BYTE;
|
|
1291 }
|
|
1292 LIR_Opr thrd = getThreadPointer();
|
|
1293 LIR_Address* mark_active_flag_addr =
|
|
1294 new LIR_Address(thrd,
|
|
1295 in_bytes(JavaThread::satb_mark_queue_offset() +
|
|
1296 PtrQueue::byte_offset_of_active()),
|
|
1297 flag_type);
|
|
1298 // Read the marking-in-progress flag.
|
|
1299 LIR_Opr flag_val = new_register(T_INT);
|
|
1300 __ load(mark_active_flag_addr, flag_val);
|
|
1301
|
|
1302 LabelObj* start_store = new LabelObj();
|
|
1303
|
|
1304 LIR_PatchCode pre_val_patch_code =
|
|
1305 patch ? lir_patch_normal : lir_patch_none;
|
|
1306
|
|
1307 LIR_Opr pre_val = new_register(T_OBJECT);
|
|
1308
|
|
1309 __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0));
|
|
1310 if (!addr_opr->is_address()) {
|
|
1311 assert(addr_opr->is_register(), "must be");
|
|
1312 addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, 0, T_OBJECT));
|
|
1313 }
|
|
1314 CodeStub* slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code,
|
|
1315 info);
|
|
1316 __ branch(lir_cond_notEqual, T_INT, slow);
|
|
1317 __ branch_destination(slow->continuation());
|
|
1318 }
|
|
1319
|
|
1320 void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
|
|
1321 if (G1DisablePostBarrier) return;
|
|
1322
|
|
1323 // If the "new_val" is a constant NULL, no barrier is necessary.
|
|
1324 if (new_val->is_constant() &&
|
|
1325 new_val->as_constant_ptr()->as_jobject() == NULL) return;
|
|
1326
|
|
1327 if (!new_val->is_register()) {
|
|
1328 LIR_Opr new_val_reg = new_pointer_register();
|
|
1329 if (new_val->is_constant()) {
|
|
1330 __ move(new_val, new_val_reg);
|
|
1331 } else {
|
|
1332 __ leal(new_val, new_val_reg);
|
|
1333 }
|
|
1334 new_val = new_val_reg;
|
|
1335 }
|
|
1336 assert(new_val->is_register(), "must be a register at this point");
|
|
1337
|
|
1338 if (addr->is_address()) {
|
|
1339 LIR_Address* address = addr->as_address_ptr();
|
|
1340 LIR_Opr ptr = new_pointer_register();
|
|
1341 if (!address->index()->is_valid() && address->disp() == 0) {
|
|
1342 __ move(address->base(), ptr);
|
|
1343 } else {
|
|
1344 assert(address->disp() != max_jint, "lea doesn't support patched addresses!");
|
|
1345 __ leal(addr, ptr);
|
|
1346 }
|
|
1347 addr = ptr;
|
|
1348 }
|
|
1349 assert(addr->is_register(), "must be a register at this point");
|
|
1350
|
|
1351 LIR_Opr xor_res = new_pointer_register();
|
|
1352 LIR_Opr xor_shift_res = new_pointer_register();
|
|
1353
|
|
1354 if (TwoOperandLIRForm ) {
|
|
1355 __ move(addr, xor_res);
|
|
1356 __ logical_xor(xor_res, new_val, xor_res);
|
|
1357 __ move(xor_res, xor_shift_res);
|
|
1358 __ unsigned_shift_right(xor_shift_res,
|
|
1359 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes),
|
|
1360 xor_shift_res,
|
|
1361 LIR_OprDesc::illegalOpr());
|
|
1362 } else {
|
|
1363 __ logical_xor(addr, new_val, xor_res);
|
|
1364 __ unsigned_shift_right(xor_res,
|
|
1365 LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes),
|
|
1366 xor_shift_res,
|
|
1367 LIR_OprDesc::illegalOpr());
|
|
1368 }
|
|
1369
|
|
1370 if (!new_val->is_register()) {
|
|
1371 LIR_Opr new_val_reg = new_pointer_register();
|
|
1372 __ leal(new_val, new_val_reg);
|
|
1373 new_val = new_val_reg;
|
|
1374 }
|
|
1375 assert(new_val->is_register(), "must be a register at this point");
|
|
1376
|
|
1377 __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD));
|
|
1378
|
|
1379 CodeStub* slow = new G1PostBarrierStub(addr, new_val);
|
|
1380 __ branch(lir_cond_notEqual, T_INT, slow);
|
|
1381 __ branch_destination(slow->continuation());
|
|
1382 }
|
|
1383
|
|
1384 #endif // SERIALGC
|
|
1385 ////////////////////////////////////////////////////////////////////////
|
|
1386
|
0
|
1387 void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) {
|
|
1388
|
342
|
1389 assert(sizeof(*((CardTableModRefBS*)_bs)->byte_map_base) == sizeof(jbyte), "adjust this code");
|
|
1390 LIR_Const* card_table_base = new LIR_Const(((CardTableModRefBS*)_bs)->byte_map_base);
|
0
|
1391 if (addr->is_address()) {
|
|
1392 LIR_Address* address = addr->as_address_ptr();
|
|
1393 LIR_Opr ptr = new_register(T_OBJECT);
|
|
1394 if (!address->index()->is_valid() && address->disp() == 0) {
|
|
1395 __ move(address->base(), ptr);
|
|
1396 } else {
|
|
1397 assert(address->disp() != max_jint, "lea doesn't support patched addresses!");
|
|
1398 __ leal(addr, ptr);
|
|
1399 }
|
|
1400 addr = ptr;
|
|
1401 }
|
|
1402 assert(addr->is_register(), "must be a register at this point");
|
|
1403
|
|
1404 LIR_Opr tmp = new_pointer_register();
|
|
1405 if (TwoOperandLIRForm) {
|
|
1406 __ move(addr, tmp);
|
|
1407 __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp);
|
|
1408 } else {
|
|
1409 __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp);
|
|
1410 }
|
|
1411 if (can_inline_as_constant(card_table_base)) {
|
|
1412 __ move(LIR_OprFact::intConst(0),
|
|
1413 new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE));
|
|
1414 } else {
|
|
1415 __ move(LIR_OprFact::intConst(0),
|
|
1416 new LIR_Address(tmp, load_constant(card_table_base),
|
|
1417 T_BYTE));
|
|
1418 }
|
|
1419 }
|
|
1420
|
|
1421
|
|
1422 //------------------------field access--------------------------------------
|
|
1423
|
|
1424 // Comment copied form templateTable_i486.cpp
|
|
1425 // ----------------------------------------------------------------------------
|
|
1426 // Volatile variables demand their effects be made known to all CPU's in
|
|
1427 // order. Store buffers on most chips allow reads & writes to reorder; the
|
|
1428 // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of
|
|
1429 // memory barrier (i.e., it's not sufficient that the interpreter does not
|
|
1430 // reorder volatile references, the hardware also must not reorder them).
|
|
1431 //
|
|
1432 // According to the new Java Memory Model (JMM):
|
|
1433 // (1) All volatiles are serialized wrt to each other.
|
|
1434 // ALSO reads & writes act as aquire & release, so:
|
|
1435 // (2) A read cannot let unrelated NON-volatile memory refs that happen after
|
|
1436 // the read float up to before the read. It's OK for non-volatile memory refs
|
|
1437 // that happen before the volatile read to float down below it.
|
|
1438 // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs
|
|
1439 // that happen BEFORE the write float down to after the write. It's OK for
|
|
1440 // non-volatile memory refs that happen after the volatile write to float up
|
|
1441 // before it.
|
|
1442 //
|
|
1443 // We only put in barriers around volatile refs (they are expensive), not
|
|
1444 // _between_ memory refs (that would require us to track the flavor of the
|
|
1445 // previous memory refs). Requirements (2) and (3) require some barriers
|
|
1446 // before volatile stores and after volatile loads. These nearly cover
|
|
1447 // requirement (1) but miss the volatile-store-volatile-load case. This final
|
|
1448 // case is placed after volatile-stores although it could just as well go
|
|
1449 // before volatile-loads.
|
|
1450
|
|
1451
|
|
1452 void LIRGenerator::do_StoreField(StoreField* x) {
|
|
1453 bool needs_patching = x->needs_patching();
|
|
1454 bool is_volatile = x->field()->is_volatile();
|
|
1455 BasicType field_type = x->field_type();
|
|
1456 bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT);
|
|
1457
|
|
1458 CodeEmitInfo* info = NULL;
|
|
1459 if (needs_patching) {
|
|
1460 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
|
|
1461 info = state_for(x, x->state_before());
|
|
1462 } else if (x->needs_null_check()) {
|
|
1463 NullCheck* nc = x->explicit_null_check();
|
|
1464 if (nc == NULL) {
|
|
1465 info = state_for(x, x->lock_stack());
|
|
1466 } else {
|
|
1467 info = state_for(nc);
|
|
1468 }
|
|
1469 }
|
|
1470
|
|
1471
|
|
1472 LIRItem object(x->obj(), this);
|
|
1473 LIRItem value(x->value(), this);
|
|
1474
|
|
1475 object.load_item();
|
|
1476
|
|
1477 if (is_volatile || needs_patching) {
|
|
1478 // load item if field is volatile (fewer special cases for volatiles)
|
|
1479 // load item if field not initialized
|
|
1480 // load item if field not constant
|
|
1481 // because of code patching we cannot inline constants
|
|
1482 if (field_type == T_BYTE || field_type == T_BOOLEAN) {
|
|
1483 value.load_byte_item();
|
|
1484 } else {
|
|
1485 value.load_item();
|
|
1486 }
|
|
1487 } else {
|
|
1488 value.load_for_store(field_type);
|
|
1489 }
|
|
1490
|
|
1491 set_no_result(x);
|
|
1492
|
|
1493 if (PrintNotLoaded && needs_patching) {
|
|
1494 tty->print_cr(" ###class not loaded at store_%s bci %d",
|
|
1495 x->is_static() ? "static" : "field", x->bci());
|
|
1496 }
|
|
1497
|
|
1498 if (x->needs_null_check() &&
|
|
1499 (needs_patching ||
|
|
1500 MacroAssembler::needs_explicit_null_check(x->offset()))) {
|
|
1501 // emit an explicit null check because the offset is too large
|
|
1502 __ null_check(object.result(), new CodeEmitInfo(info));
|
|
1503 }
|
|
1504
|
|
1505 LIR_Address* address;
|
|
1506 if (needs_patching) {
|
|
1507 // we need to patch the offset in the instruction so don't allow
|
|
1508 // generate_address to try to be smart about emitting the -1.
|
|
1509 // Otherwise the patching code won't know how to find the
|
|
1510 // instruction to patch.
|
|
1511 address = new LIR_Address(object.result(), max_jint, field_type);
|
|
1512 } else {
|
|
1513 address = generate_address(object.result(), x->offset(), field_type);
|
|
1514 }
|
|
1515
|
|
1516 if (is_volatile && os::is_MP()) {
|
|
1517 __ membar_release();
|
|
1518 }
|
|
1519
|
342
|
1520 if (is_oop) {
|
|
1521 // Do the pre-write barrier, if any.
|
|
1522 pre_barrier(LIR_OprFact::address(address),
|
|
1523 needs_patching,
|
|
1524 (info ? new CodeEmitInfo(info) : NULL));
|
|
1525 }
|
|
1526
|
0
|
1527 if (is_volatile) {
|
|
1528 assert(!needs_patching && x->is_loaded(),
|
|
1529 "how do we know it's volatile if it's not loaded");
|
|
1530 volatile_field_store(value.result(), address, info);
|
|
1531 } else {
|
|
1532 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
|
|
1533 __ store(value.result(), address, info, patch_code);
|
|
1534 }
|
|
1535
|
|
1536 if (is_oop) {
|
342
|
1537 #ifdef PRECISE_CARDMARK
|
|
1538 // Precise cardmarks don't work
|
|
1539 post_barrier(LIR_OprFact::address(address), value.result());
|
|
1540 #else
|
0
|
1541 post_barrier(object.result(), value.result());
|
342
|
1542 #endif // PRECISE_CARDMARK
|
0
|
1543 }
|
|
1544
|
|
1545 if (is_volatile && os::is_MP()) {
|
|
1546 __ membar();
|
|
1547 }
|
|
1548 }
|
|
1549
|
|
1550
|
|
1551 void LIRGenerator::do_LoadField(LoadField* x) {
|
|
1552 bool needs_patching = x->needs_patching();
|
|
1553 bool is_volatile = x->field()->is_volatile();
|
|
1554 BasicType field_type = x->field_type();
|
|
1555
|
|
1556 CodeEmitInfo* info = NULL;
|
|
1557 if (needs_patching) {
|
|
1558 assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access");
|
|
1559 info = state_for(x, x->state_before());
|
|
1560 } else if (x->needs_null_check()) {
|
|
1561 NullCheck* nc = x->explicit_null_check();
|
|
1562 if (nc == NULL) {
|
|
1563 info = state_for(x, x->lock_stack());
|
|
1564 } else {
|
|
1565 info = state_for(nc);
|
|
1566 }
|
|
1567 }
|
|
1568
|
|
1569 LIRItem object(x->obj(), this);
|
|
1570
|
|
1571 object.load_item();
|
|
1572
|
|
1573 if (PrintNotLoaded && needs_patching) {
|
|
1574 tty->print_cr(" ###class not loaded at load_%s bci %d",
|
|
1575 x->is_static() ? "static" : "field", x->bci());
|
|
1576 }
|
|
1577
|
|
1578 if (x->needs_null_check() &&
|
|
1579 (needs_patching ||
|
|
1580 MacroAssembler::needs_explicit_null_check(x->offset()))) {
|
|
1581 // emit an explicit null check because the offset is too large
|
|
1582 __ null_check(object.result(), new CodeEmitInfo(info));
|
|
1583 }
|
|
1584
|
|
1585 LIR_Opr reg = rlock_result(x, field_type);
|
|
1586 LIR_Address* address;
|
|
1587 if (needs_patching) {
|
|
1588 // we need to patch the offset in the instruction so don't allow
|
|
1589 // generate_address to try to be smart about emitting the -1.
|
|
1590 // Otherwise the patching code won't know how to find the
|
|
1591 // instruction to patch.
|
|
1592 address = new LIR_Address(object.result(), max_jint, field_type);
|
|
1593 } else {
|
|
1594 address = generate_address(object.result(), x->offset(), field_type);
|
|
1595 }
|
|
1596
|
|
1597 if (is_volatile) {
|
|
1598 assert(!needs_patching && x->is_loaded(),
|
|
1599 "how do we know it's volatile if it's not loaded");
|
|
1600 volatile_field_load(address, reg, info);
|
|
1601 } else {
|
|
1602 LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none;
|
|
1603 __ load(address, reg, info, patch_code);
|
|
1604 }
|
|
1605
|
|
1606 if (is_volatile && os::is_MP()) {
|
|
1607 __ membar_acquire();
|
|
1608 }
|
|
1609 }
|
|
1610
|
|
1611
|
|
1612 //------------------------java.nio.Buffer.checkIndex------------------------
|
|
1613
|
|
1614 // int java.nio.Buffer.checkIndex(int)
|
|
1615 void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) {
|
|
1616 // NOTE: by the time we are in checkIndex() we are guaranteed that
|
|
1617 // the buffer is non-null (because checkIndex is package-private and
|
|
1618 // only called from within other methods in the buffer).
|
|
1619 assert(x->number_of_arguments() == 2, "wrong type");
|
|
1620 LIRItem buf (x->argument_at(0), this);
|
|
1621 LIRItem index(x->argument_at(1), this);
|
|
1622 buf.load_item();
|
|
1623 index.load_item();
|
|
1624
|
|
1625 LIR_Opr result = rlock_result(x);
|
|
1626 if (GenerateRangeChecks) {
|
|
1627 CodeEmitInfo* info = state_for(x);
|
|
1628 CodeStub* stub = new RangeCheckStub(info, index.result(), true);
|
|
1629 if (index.result()->is_constant()) {
|
|
1630 cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info);
|
|
1631 __ branch(lir_cond_belowEqual, T_INT, stub);
|
|
1632 } else {
|
|
1633 cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(),
|
|
1634 java_nio_Buffer::limit_offset(), T_INT, info);
|
|
1635 __ branch(lir_cond_aboveEqual, T_INT, stub);
|
|
1636 }
|
|
1637 __ move(index.result(), result);
|
|
1638 } else {
|
|
1639 // Just load the index into the result register
|
|
1640 __ move(index.result(), result);
|
|
1641 }
|
|
1642 }
|
|
1643
|
|
1644
|
|
1645 //------------------------array access--------------------------------------
|
|
1646
|
|
1647
|
|
1648 void LIRGenerator::do_ArrayLength(ArrayLength* x) {
|
|
1649 LIRItem array(x->array(), this);
|
|
1650 array.load_item();
|
|
1651 LIR_Opr reg = rlock_result(x);
|
|
1652
|
|
1653 CodeEmitInfo* info = NULL;
|
|
1654 if (x->needs_null_check()) {
|
|
1655 NullCheck* nc = x->explicit_null_check();
|
|
1656 if (nc == NULL) {
|
|
1657 info = state_for(x);
|
|
1658 } else {
|
|
1659 info = state_for(nc);
|
|
1660 }
|
|
1661 }
|
|
1662 __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none);
|
|
1663 }
|
|
1664
|
|
1665
|
|
1666 void LIRGenerator::do_LoadIndexed(LoadIndexed* x) {
|
|
1667 bool use_length = x->length() != NULL;
|
|
1668 LIRItem array(x->array(), this);
|
|
1669 LIRItem index(x->index(), this);
|
|
1670 LIRItem length(this);
|
|
1671 bool needs_range_check = true;
|
|
1672
|
|
1673 if (use_length) {
|
|
1674 needs_range_check = x->compute_needs_range_check();
|
|
1675 if (needs_range_check) {
|
|
1676 length.set_instruction(x->length());
|
|
1677 length.load_item();
|
|
1678 }
|
|
1679 }
|
|
1680
|
|
1681 array.load_item();
|
|
1682 if (index.is_constant() && can_inline_as_constant(x->index())) {
|
|
1683 // let it be a constant
|
|
1684 index.dont_load_item();
|
|
1685 } else {
|
|
1686 index.load_item();
|
|
1687 }
|
|
1688
|
|
1689 CodeEmitInfo* range_check_info = state_for(x);
|
|
1690 CodeEmitInfo* null_check_info = NULL;
|
|
1691 if (x->needs_null_check()) {
|
|
1692 NullCheck* nc = x->explicit_null_check();
|
|
1693 if (nc != NULL) {
|
|
1694 null_check_info = state_for(nc);
|
|
1695 } else {
|
|
1696 null_check_info = range_check_info;
|
|
1697 }
|
|
1698 }
|
|
1699
|
|
1700 // emit array address setup early so it schedules better
|
|
1701 LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false);
|
|
1702
|
|
1703 if (GenerateRangeChecks && needs_range_check) {
|
|
1704 if (use_length) {
|
|
1705 // TODO: use a (modified) version of array_range_check that does not require a
|
|
1706 // constant length to be loaded to a register
|
|
1707 __ cmp(lir_cond_belowEqual, length.result(), index.result());
|
|
1708 __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result()));
|
|
1709 } else {
|
|
1710 array_range_check(array.result(), index.result(), null_check_info, range_check_info);
|
|
1711 // The range check performs the null check, so clear it out for the load
|
|
1712 null_check_info = NULL;
|
|
1713 }
|
|
1714 }
|
|
1715
|
|
1716 __ move(array_addr, rlock_result(x, x->elt_type()), null_check_info);
|
|
1717 }
|
|
1718
|
|
1719
|
|
1720 void LIRGenerator::do_NullCheck(NullCheck* x) {
|
|
1721 if (x->can_trap()) {
|
|
1722 LIRItem value(x->obj(), this);
|
|
1723 value.load_item();
|
|
1724 CodeEmitInfo* info = state_for(x);
|
|
1725 __ null_check(value.result(), info);
|
|
1726 }
|
|
1727 }
|
|
1728
|
|
1729
|
|
1730 void LIRGenerator::do_Throw(Throw* x) {
|
|
1731 LIRItem exception(x->exception(), this);
|
|
1732 exception.load_item();
|
|
1733 set_no_result(x);
|
|
1734 LIR_Opr exception_opr = exception.result();
|
|
1735 CodeEmitInfo* info = state_for(x, x->state());
|
|
1736
|
|
1737 #ifndef PRODUCT
|
|
1738 if (PrintC1Statistics) {
|
|
1739 increment_counter(Runtime1::throw_count_address());
|
|
1740 }
|
|
1741 #endif
|
|
1742
|
|
1743 // check if the instruction has an xhandler in any of the nested scopes
|
|
1744 bool unwind = false;
|
|
1745 if (info->exception_handlers()->length() == 0) {
|
|
1746 // this throw is not inside an xhandler
|
|
1747 unwind = true;
|
|
1748 } else {
|
|
1749 // get some idea of the throw type
|
|
1750 bool type_is_exact = true;
|
|
1751 ciType* throw_type = x->exception()->exact_type();
|
|
1752 if (throw_type == NULL) {
|
|
1753 type_is_exact = false;
|
|
1754 throw_type = x->exception()->declared_type();
|
|
1755 }
|
|
1756 if (throw_type != NULL && throw_type->is_instance_klass()) {
|
|
1757 ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type;
|
|
1758 unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact);
|
|
1759 }
|
|
1760 }
|
|
1761
|
|
1762 // do null check before moving exception oop into fixed register
|
|
1763 // to avoid a fixed interval with an oop during the null check.
|
|
1764 // Use a copy of the CodeEmitInfo because debug information is
|
|
1765 // different for null_check and throw.
|
|
1766 if (GenerateCompilerNullChecks &&
|
|
1767 (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) {
|
|
1768 // if the exception object wasn't created using new then it might be null.
|
|
1769 __ null_check(exception_opr, new CodeEmitInfo(info, true));
|
|
1770 }
|
|
1771
|
|
1772 if (JvmtiExport::can_post_exceptions() &&
|
|
1773 !block()->is_set(BlockBegin::default_exception_handler_flag)) {
|
|
1774 // we need to go through the exception lookup path to get JVMTI
|
|
1775 // notification done
|
|
1776 unwind = false;
|
|
1777 }
|
|
1778
|
|
1779 assert(!block()->is_set(BlockBegin::default_exception_handler_flag) || unwind,
|
|
1780 "should be no more handlers to dispatch to");
|
|
1781
|
|
1782 if (DTraceMethodProbes &&
|
|
1783 block()->is_set(BlockBegin::default_exception_handler_flag)) {
|
|
1784 // notify that this frame is unwinding
|
|
1785 BasicTypeList signature;
|
|
1786 signature.append(T_INT); // thread
|
|
1787 signature.append(T_OBJECT); // methodOop
|
|
1788 LIR_OprList* args = new LIR_OprList();
|
|
1789 args->append(getThreadPointer());
|
|
1790 LIR_Opr meth = new_register(T_OBJECT);
|
|
1791 __ oop2reg(method()->encoding(), meth);
|
|
1792 args->append(meth);
|
|
1793 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL);
|
|
1794 }
|
|
1795
|
|
1796 // move exception oop into fixed register
|
|
1797 __ move(exception_opr, exceptionOopOpr());
|
|
1798
|
|
1799 if (unwind) {
|
|
1800 __ unwind_exception(LIR_OprFact::illegalOpr, exceptionOopOpr(), info);
|
|
1801 } else {
|
|
1802 __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info);
|
|
1803 }
|
|
1804 }
|
|
1805
|
|
1806
|
|
1807 void LIRGenerator::do_RoundFP(RoundFP* x) {
|
|
1808 LIRItem input(x->input(), this);
|
|
1809 input.load_item();
|
|
1810 LIR_Opr input_opr = input.result();
|
|
1811 assert(input_opr->is_register(), "why round if value is not in a register?");
|
|
1812 assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value");
|
|
1813 if (input_opr->is_single_fpu()) {
|
|
1814 set_result(x, round_item(input_opr)); // This code path not currently taken
|
|
1815 } else {
|
|
1816 LIR_Opr result = new_register(T_DOUBLE);
|
|
1817 set_vreg_flag(result, must_start_in_memory);
|
|
1818 __ roundfp(input_opr, LIR_OprFact::illegalOpr, result);
|
|
1819 set_result(x, result);
|
|
1820 }
|
|
1821 }
|
|
1822
|
|
1823 void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) {
|
|
1824 LIRItem base(x->base(), this);
|
|
1825 LIRItem idx(this);
|
|
1826
|
|
1827 base.load_item();
|
|
1828 if (x->has_index()) {
|
|
1829 idx.set_instruction(x->index());
|
|
1830 idx.load_nonconstant();
|
|
1831 }
|
|
1832
|
|
1833 LIR_Opr reg = rlock_result(x, x->basic_type());
|
|
1834
|
|
1835 int log2_scale = 0;
|
|
1836 if (x->has_index()) {
|
|
1837 assert(x->index()->type()->tag() == intTag, "should not find non-int index");
|
|
1838 log2_scale = x->log2_scale();
|
|
1839 }
|
|
1840
|
|
1841 assert(!x->has_index() || idx.value() == x->index(), "should match");
|
|
1842
|
|
1843 LIR_Opr base_op = base.result();
|
|
1844 #ifndef _LP64
|
|
1845 if (x->base()->type()->tag() == longTag) {
|
|
1846 base_op = new_register(T_INT);
|
|
1847 __ convert(Bytecodes::_l2i, base.result(), base_op);
|
|
1848 } else {
|
|
1849 assert(x->base()->type()->tag() == intTag, "must be");
|
|
1850 }
|
|
1851 #endif
|
|
1852
|
|
1853 BasicType dst_type = x->basic_type();
|
|
1854 LIR_Opr index_op = idx.result();
|
|
1855
|
|
1856 LIR_Address* addr;
|
|
1857 if (index_op->is_constant()) {
|
|
1858 assert(log2_scale == 0, "must not have a scale");
|
|
1859 addr = new LIR_Address(base_op, index_op->as_jint(), dst_type);
|
|
1860 } else {
|
|
1861 #ifdef IA32
|
|
1862 addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type);
|
|
1863 #else
|
|
1864 if (index_op->is_illegal() || log2_scale == 0) {
|
|
1865 addr = new LIR_Address(base_op, index_op, dst_type);
|
|
1866 } else {
|
|
1867 LIR_Opr tmp = new_register(T_INT);
|
|
1868 __ shift_left(index_op, log2_scale, tmp);
|
|
1869 addr = new LIR_Address(base_op, tmp, dst_type);
|
|
1870 }
|
|
1871 #endif
|
|
1872 }
|
|
1873
|
|
1874 if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) {
|
|
1875 __ unaligned_move(addr, reg);
|
|
1876 } else {
|
|
1877 __ move(addr, reg);
|
|
1878 }
|
|
1879 }
|
|
1880
|
|
1881
|
|
1882 void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) {
|
|
1883 int log2_scale = 0;
|
|
1884 BasicType type = x->basic_type();
|
|
1885
|
|
1886 if (x->has_index()) {
|
|
1887 assert(x->index()->type()->tag() == intTag, "should not find non-int index");
|
|
1888 log2_scale = x->log2_scale();
|
|
1889 }
|
|
1890
|
|
1891 LIRItem base(x->base(), this);
|
|
1892 LIRItem value(x->value(), this);
|
|
1893 LIRItem idx(this);
|
|
1894
|
|
1895 base.load_item();
|
|
1896 if (x->has_index()) {
|
|
1897 idx.set_instruction(x->index());
|
|
1898 idx.load_item();
|
|
1899 }
|
|
1900
|
|
1901 if (type == T_BYTE || type == T_BOOLEAN) {
|
|
1902 value.load_byte_item();
|
|
1903 } else {
|
|
1904 value.load_item();
|
|
1905 }
|
|
1906
|
|
1907 set_no_result(x);
|
|
1908
|
|
1909 LIR_Opr base_op = base.result();
|
|
1910 #ifndef _LP64
|
|
1911 if (x->base()->type()->tag() == longTag) {
|
|
1912 base_op = new_register(T_INT);
|
|
1913 __ convert(Bytecodes::_l2i, base.result(), base_op);
|
|
1914 } else {
|
|
1915 assert(x->base()->type()->tag() == intTag, "must be");
|
|
1916 }
|
|
1917 #endif
|
|
1918
|
|
1919 LIR_Opr index_op = idx.result();
|
|
1920 if (log2_scale != 0) {
|
|
1921 // temporary fix (platform dependent code without shift on Intel would be better)
|
|
1922 index_op = new_register(T_INT);
|
|
1923 __ move(idx.result(), index_op);
|
|
1924 __ shift_left(index_op, log2_scale, index_op);
|
|
1925 }
|
|
1926
|
|
1927 LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type());
|
|
1928 __ move(value.result(), addr);
|
|
1929 }
|
|
1930
|
|
1931
|
|
1932 void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) {
|
|
1933 BasicType type = x->basic_type();
|
|
1934 LIRItem src(x->object(), this);
|
|
1935 LIRItem off(x->offset(), this);
|
|
1936
|
|
1937 off.load_item();
|
|
1938 src.load_item();
|
|
1939
|
|
1940 LIR_Opr reg = reg = rlock_result(x, x->basic_type());
|
|
1941
|
|
1942 if (x->is_volatile() && os::is_MP()) __ membar_acquire();
|
|
1943 get_Object_unsafe(reg, src.result(), off.result(), type, x->is_volatile());
|
|
1944 if (x->is_volatile() && os::is_MP()) __ membar();
|
|
1945 }
|
|
1946
|
|
1947
|
|
1948 void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) {
|
|
1949 BasicType type = x->basic_type();
|
|
1950 LIRItem src(x->object(), this);
|
|
1951 LIRItem off(x->offset(), this);
|
|
1952 LIRItem data(x->value(), this);
|
|
1953
|
|
1954 src.load_item();
|
|
1955 if (type == T_BOOLEAN || type == T_BYTE) {
|
|
1956 data.load_byte_item();
|
|
1957 } else {
|
|
1958 data.load_item();
|
|
1959 }
|
|
1960 off.load_item();
|
|
1961
|
|
1962 set_no_result(x);
|
|
1963
|
|
1964 if (x->is_volatile() && os::is_MP()) __ membar_release();
|
|
1965 put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile());
|
|
1966 }
|
|
1967
|
|
1968
|
|
1969 void LIRGenerator::do_UnsafePrefetch(UnsafePrefetch* x, bool is_store) {
|
|
1970 LIRItem src(x->object(), this);
|
|
1971 LIRItem off(x->offset(), this);
|
|
1972
|
|
1973 src.load_item();
|
|
1974 if (off.is_constant() && can_inline_as_constant(x->offset())) {
|
|
1975 // let it be a constant
|
|
1976 off.dont_load_item();
|
|
1977 } else {
|
|
1978 off.load_item();
|
|
1979 }
|
|
1980
|
|
1981 set_no_result(x);
|
|
1982
|
|
1983 LIR_Address* addr = generate_address(src.result(), off.result(), 0, 0, T_BYTE);
|
|
1984 __ prefetch(addr, is_store);
|
|
1985 }
|
|
1986
|
|
1987
|
|
1988 void LIRGenerator::do_UnsafePrefetchRead(UnsafePrefetchRead* x) {
|
|
1989 do_UnsafePrefetch(x, false);
|
|
1990 }
|
|
1991
|
|
1992
|
|
1993 void LIRGenerator::do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) {
|
|
1994 do_UnsafePrefetch(x, true);
|
|
1995 }
|
|
1996
|
|
1997
|
|
1998 void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) {
|
|
1999 int lng = x->length();
|
|
2000
|
|
2001 for (int i = 0; i < lng; i++) {
|
|
2002 SwitchRange* one_range = x->at(i);
|
|
2003 int low_key = one_range->low_key();
|
|
2004 int high_key = one_range->high_key();
|
|
2005 BlockBegin* dest = one_range->sux();
|
|
2006 if (low_key == high_key) {
|
|
2007 __ cmp(lir_cond_equal, value, low_key);
|
|
2008 __ branch(lir_cond_equal, T_INT, dest);
|
|
2009 } else if (high_key - low_key == 1) {
|
|
2010 __ cmp(lir_cond_equal, value, low_key);
|
|
2011 __ branch(lir_cond_equal, T_INT, dest);
|
|
2012 __ cmp(lir_cond_equal, value, high_key);
|
|
2013 __ branch(lir_cond_equal, T_INT, dest);
|
|
2014 } else {
|
|
2015 LabelObj* L = new LabelObj();
|
|
2016 __ cmp(lir_cond_less, value, low_key);
|
|
2017 __ branch(lir_cond_less, L->label());
|
|
2018 __ cmp(lir_cond_lessEqual, value, high_key);
|
|
2019 __ branch(lir_cond_lessEqual, T_INT, dest);
|
|
2020 __ branch_destination(L->label());
|
|
2021 }
|
|
2022 }
|
|
2023 __ jump(default_sux);
|
|
2024 }
|
|
2025
|
|
2026
|
|
2027 SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) {
|
|
2028 SwitchRangeList* res = new SwitchRangeList();
|
|
2029 int len = x->length();
|
|
2030 if (len > 0) {
|
|
2031 BlockBegin* sux = x->sux_at(0);
|
|
2032 int key = x->lo_key();
|
|
2033 BlockBegin* default_sux = x->default_sux();
|
|
2034 SwitchRange* range = new SwitchRange(key, sux);
|
|
2035 for (int i = 0; i < len; i++, key++) {
|
|
2036 BlockBegin* new_sux = x->sux_at(i);
|
|
2037 if (sux == new_sux) {
|
|
2038 // still in same range
|
|
2039 range->set_high_key(key);
|
|
2040 } else {
|
|
2041 // skip tests which explicitly dispatch to the default
|
|
2042 if (sux != default_sux) {
|
|
2043 res->append(range);
|
|
2044 }
|
|
2045 range = new SwitchRange(key, new_sux);
|
|
2046 }
|
|
2047 sux = new_sux;
|
|
2048 }
|
|
2049 if (res->length() == 0 || res->last() != range) res->append(range);
|
|
2050 }
|
|
2051 return res;
|
|
2052 }
|
|
2053
|
|
2054
|
|
2055 // we expect the keys to be sorted by increasing value
|
|
2056 SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) {
|
|
2057 SwitchRangeList* res = new SwitchRangeList();
|
|
2058 int len = x->length();
|
|
2059 if (len > 0) {
|
|
2060 BlockBegin* default_sux = x->default_sux();
|
|
2061 int key = x->key_at(0);
|
|
2062 BlockBegin* sux = x->sux_at(0);
|
|
2063 SwitchRange* range = new SwitchRange(key, sux);
|
|
2064 for (int i = 1; i < len; i++) {
|
|
2065 int new_key = x->key_at(i);
|
|
2066 BlockBegin* new_sux = x->sux_at(i);
|
|
2067 if (key+1 == new_key && sux == new_sux) {
|
|
2068 // still in same range
|
|
2069 range->set_high_key(new_key);
|
|
2070 } else {
|
|
2071 // skip tests which explicitly dispatch to the default
|
|
2072 if (range->sux() != default_sux) {
|
|
2073 res->append(range);
|
|
2074 }
|
|
2075 range = new SwitchRange(new_key, new_sux);
|
|
2076 }
|
|
2077 key = new_key;
|
|
2078 sux = new_sux;
|
|
2079 }
|
|
2080 if (res->length() == 0 || res->last() != range) res->append(range);
|
|
2081 }
|
|
2082 return res;
|
|
2083 }
|
|
2084
|
|
2085
|
|
2086 void LIRGenerator::do_TableSwitch(TableSwitch* x) {
|
|
2087 LIRItem tag(x->tag(), this);
|
|
2088 tag.load_item();
|
|
2089 set_no_result(x);
|
|
2090
|
|
2091 if (x->is_safepoint()) {
|
|
2092 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
|
|
2093 }
|
|
2094
|
|
2095 // move values into phi locations
|
|
2096 move_to_phi(x->state());
|
|
2097
|
|
2098 int lo_key = x->lo_key();
|
|
2099 int hi_key = x->hi_key();
|
|
2100 int len = x->length();
|
|
2101 CodeEmitInfo* info = state_for(x, x->state());
|
|
2102 LIR_Opr value = tag.result();
|
|
2103 if (UseTableRanges) {
|
|
2104 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
|
|
2105 } else {
|
|
2106 for (int i = 0; i < len; i++) {
|
|
2107 __ cmp(lir_cond_equal, value, i + lo_key);
|
|
2108 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
|
|
2109 }
|
|
2110 __ jump(x->default_sux());
|
|
2111 }
|
|
2112 }
|
|
2113
|
|
2114
|
|
2115 void LIRGenerator::do_LookupSwitch(LookupSwitch* x) {
|
|
2116 LIRItem tag(x->tag(), this);
|
|
2117 tag.load_item();
|
|
2118 set_no_result(x);
|
|
2119
|
|
2120 if (x->is_safepoint()) {
|
|
2121 __ safepoint(safepoint_poll_register(), state_for(x, x->state_before()));
|
|
2122 }
|
|
2123
|
|
2124 // move values into phi locations
|
|
2125 move_to_phi(x->state());
|
|
2126
|
|
2127 LIR_Opr value = tag.result();
|
|
2128 if (UseTableRanges) {
|
|
2129 do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux());
|
|
2130 } else {
|
|
2131 int len = x->length();
|
|
2132 for (int i = 0; i < len; i++) {
|
|
2133 __ cmp(lir_cond_equal, value, x->key_at(i));
|
|
2134 __ branch(lir_cond_equal, T_INT, x->sux_at(i));
|
|
2135 }
|
|
2136 __ jump(x->default_sux());
|
|
2137 }
|
|
2138 }
|
|
2139
|
|
2140
|
|
2141 void LIRGenerator::do_Goto(Goto* x) {
|
|
2142 set_no_result(x);
|
|
2143
|
|
2144 if (block()->next()->as_OsrEntry()) {
|
|
2145 // need to free up storage used for OSR entry point
|
|
2146 LIR_Opr osrBuffer = block()->next()->operand();
|
|
2147 BasicTypeList signature;
|
|
2148 signature.append(T_INT);
|
|
2149 CallingConvention* cc = frame_map()->c_calling_convention(&signature);
|
|
2150 __ move(osrBuffer, cc->args()->at(0));
|
|
2151 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end),
|
|
2152 getThreadTemp(), LIR_OprFact::illegalOpr, cc->args());
|
|
2153 }
|
|
2154
|
|
2155 if (x->is_safepoint()) {
|
|
2156 ValueStack* state = x->state_before() ? x->state_before() : x->state();
|
|
2157
|
|
2158 // increment backedge counter if needed
|
|
2159 increment_backedge_counter(state_for(x, state));
|
|
2160
|
|
2161 CodeEmitInfo* safepoint_info = state_for(x, state);
|
|
2162 __ safepoint(safepoint_poll_register(), safepoint_info);
|
|
2163 }
|
|
2164
|
|
2165 // emit phi-instruction move after safepoint since this simplifies
|
|
2166 // describing the state as the safepoint.
|
|
2167 move_to_phi(x->state());
|
|
2168
|
|
2169 __ jump(x->default_sux());
|
|
2170 }
|
|
2171
|
|
2172
|
|
2173 void LIRGenerator::do_Base(Base* x) {
|
|
2174 __ std_entry(LIR_OprFact::illegalOpr);
|
|
2175 // Emit moves from physical registers / stack slots to virtual registers
|
|
2176 CallingConvention* args = compilation()->frame_map()->incoming_arguments();
|
|
2177 IRScope* irScope = compilation()->hir()->top_scope();
|
|
2178 int java_index = 0;
|
|
2179 for (int i = 0; i < args->length(); i++) {
|
|
2180 LIR_Opr src = args->at(i);
|
|
2181 assert(!src->is_illegal(), "check");
|
|
2182 BasicType t = src->type();
|
|
2183
|
|
2184 // Types which are smaller than int are passed as int, so
|
|
2185 // correct the type which passed.
|
|
2186 switch (t) {
|
|
2187 case T_BYTE:
|
|
2188 case T_BOOLEAN:
|
|
2189 case T_SHORT:
|
|
2190 case T_CHAR:
|
|
2191 t = T_INT;
|
|
2192 break;
|
|
2193 }
|
|
2194
|
|
2195 LIR_Opr dest = new_register(t);
|
|
2196 __ move(src, dest);
|
|
2197
|
|
2198 // Assign new location to Local instruction for this local
|
|
2199 Local* local = x->state()->local_at(java_index)->as_Local();
|
|
2200 assert(local != NULL, "Locals for incoming arguments must have been created");
|
|
2201 assert(as_ValueType(t)->tag() == local->type()->tag(), "check");
|
|
2202 local->set_operand(dest);
|
|
2203 _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL);
|
|
2204 java_index += type2size[t];
|
|
2205 }
|
|
2206
|
|
2207 if (DTraceMethodProbes) {
|
|
2208 BasicTypeList signature;
|
|
2209 signature.append(T_INT); // thread
|
|
2210 signature.append(T_OBJECT); // methodOop
|
|
2211 LIR_OprList* args = new LIR_OprList();
|
|
2212 args->append(getThreadPointer());
|
|
2213 LIR_Opr meth = new_register(T_OBJECT);
|
|
2214 __ oop2reg(method()->encoding(), meth);
|
|
2215 args->append(meth);
|
|
2216 call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL);
|
|
2217 }
|
|
2218
|
|
2219 if (method()->is_synchronized()) {
|
|
2220 LIR_Opr obj;
|
|
2221 if (method()->is_static()) {
|
|
2222 obj = new_register(T_OBJECT);
|
|
2223 __ oop2reg(method()->holder()->java_mirror()->encoding(), obj);
|
|
2224 } else {
|
|
2225 Local* receiver = x->state()->local_at(0)->as_Local();
|
|
2226 assert(receiver != NULL, "must already exist");
|
|
2227 obj = receiver->operand();
|
|
2228 }
|
|
2229 assert(obj->is_valid(), "must be valid");
|
|
2230
|
|
2231 if (method()->is_synchronized() && GenerateSynchronizationCode) {
|
|
2232 LIR_Opr lock = new_register(T_INT);
|
|
2233 __ load_stack_address_monitor(0, lock);
|
|
2234
|
|
2235 CodeEmitInfo* info = new CodeEmitInfo(SynchronizationEntryBCI, scope()->start()->state(), NULL);
|
|
2236 CodeStub* slow_path = new MonitorEnterStub(obj, lock, info);
|
|
2237
|
|
2238 // receiver is guaranteed non-NULL so don't need CodeEmitInfo
|
|
2239 __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL);
|
|
2240 }
|
|
2241 }
|
|
2242
|
|
2243 // increment invocation counters if needed
|
|
2244 increment_invocation_counter(new CodeEmitInfo(0, scope()->start()->state(), NULL));
|
|
2245
|
|
2246 // all blocks with a successor must end with an unconditional jump
|
|
2247 // to the successor even if they are consecutive
|
|
2248 __ jump(x->default_sux());
|
|
2249 }
|
|
2250
|
|
2251
|
|
2252 void LIRGenerator::do_OsrEntry(OsrEntry* x) {
|
|
2253 // construct our frame and model the production of incoming pointer
|
|
2254 // to the OSR buffer.
|
|
2255 __ osr_entry(LIR_Assembler::osrBufferPointer());
|
|
2256 LIR_Opr result = rlock_result(x);
|
|
2257 __ move(LIR_Assembler::osrBufferPointer(), result);
|
|
2258 }
|
|
2259
|
|
2260
|
|
2261 void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) {
|
|
2262 int i = x->has_receiver() ? 1 : 0;
|
|
2263 for (; i < args->length(); i++) {
|
|
2264 LIRItem* param = args->at(i);
|
|
2265 LIR_Opr loc = arg_list->at(i);
|
|
2266 if (loc->is_register()) {
|
|
2267 param->load_item_force(loc);
|
|
2268 } else {
|
|
2269 LIR_Address* addr = loc->as_address_ptr();
|
|
2270 param->load_for_store(addr->type());
|
|
2271 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
|
|
2272 __ unaligned_move(param->result(), addr);
|
|
2273 } else {
|
|
2274 __ move(param->result(), addr);
|
|
2275 }
|
|
2276 }
|
|
2277 }
|
|
2278
|
|
2279 if (x->has_receiver()) {
|
|
2280 LIRItem* receiver = args->at(0);
|
|
2281 LIR_Opr loc = arg_list->at(0);
|
|
2282 if (loc->is_register()) {
|
|
2283 receiver->load_item_force(loc);
|
|
2284 } else {
|
|
2285 assert(loc->is_address(), "just checking");
|
|
2286 receiver->load_for_store(T_OBJECT);
|
|
2287 __ move(receiver->result(), loc);
|
|
2288 }
|
|
2289 }
|
|
2290 }
|
|
2291
|
|
2292
|
|
2293 // Visits all arguments, returns appropriate items without loading them
|
|
2294 LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) {
|
|
2295 LIRItemList* argument_items = new LIRItemList();
|
|
2296 if (x->has_receiver()) {
|
|
2297 LIRItem* receiver = new LIRItem(x->receiver(), this);
|
|
2298 argument_items->append(receiver);
|
|
2299 }
|
|
2300 int idx = x->has_receiver() ? 1 : 0;
|
|
2301 for (int i = 0; i < x->number_of_arguments(); i++) {
|
|
2302 LIRItem* param = new LIRItem(x->argument_at(i), this);
|
|
2303 argument_items->append(param);
|
|
2304 idx += (param->type()->is_double_word() ? 2 : 1);
|
|
2305 }
|
|
2306 return argument_items;
|
|
2307 }
|
|
2308
|
|
2309
|
|
2310 // The invoke with receiver has following phases:
|
|
2311 // a) traverse and load/lock receiver;
|
|
2312 // b) traverse all arguments -> item-array (invoke_visit_argument)
|
|
2313 // c) push receiver on stack
|
|
2314 // d) load each of the items and push on stack
|
|
2315 // e) unlock receiver
|
|
2316 // f) move receiver into receiver-register %o0
|
|
2317 // g) lock result registers and emit call operation
|
|
2318 //
|
|
2319 // Before issuing a call, we must spill-save all values on stack
|
|
2320 // that are in caller-save register. "spill-save" moves thos registers
|
|
2321 // either in a free callee-save register or spills them if no free
|
|
2322 // callee save register is available.
|
|
2323 //
|
|
2324 // The problem is where to invoke spill-save.
|
|
2325 // - if invoked between e) and f), we may lock callee save
|
|
2326 // register in "spill-save" that destroys the receiver register
|
|
2327 // before f) is executed
|
|
2328 // - if we rearange the f) to be earlier, by loading %o0, it
|
|
2329 // may destroy a value on the stack that is currently in %o0
|
|
2330 // and is waiting to be spilled
|
|
2331 // - if we keep the receiver locked while doing spill-save,
|
|
2332 // we cannot spill it as it is spill-locked
|
|
2333 //
|
|
2334 void LIRGenerator::do_Invoke(Invoke* x) {
|
|
2335 CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true);
|
|
2336
|
|
2337 LIR_OprList* arg_list = cc->args();
|
|
2338 LIRItemList* args = invoke_visit_arguments(x);
|
|
2339 LIR_Opr receiver = LIR_OprFact::illegalOpr;
|
|
2340
|
|
2341 // setup result register
|
|
2342 LIR_Opr result_register = LIR_OprFact::illegalOpr;
|
|
2343 if (x->type() != voidType) {
|
|
2344 result_register = result_register_for(x->type());
|
|
2345 }
|
|
2346
|
|
2347 CodeEmitInfo* info = state_for(x, x->state());
|
|
2348
|
|
2349 invoke_load_arguments(x, args, arg_list);
|
|
2350
|
|
2351 if (x->has_receiver()) {
|
|
2352 args->at(0)->load_item_force(LIR_Assembler::receiverOpr());
|
|
2353 receiver = args->at(0)->result();
|
|
2354 }
|
|
2355
|
|
2356 // emit invoke code
|
|
2357 bool optimized = x->target_is_loaded() && x->target_is_final();
|
|
2358 assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match");
|
|
2359
|
|
2360 switch (x->code()) {
|
|
2361 case Bytecodes::_invokestatic:
|
|
2362 __ call_static(x->target(), result_register,
|
|
2363 SharedRuntime::get_resolve_static_call_stub(),
|
|
2364 arg_list, info);
|
|
2365 break;
|
|
2366 case Bytecodes::_invokespecial:
|
|
2367 case Bytecodes::_invokevirtual:
|
|
2368 case Bytecodes::_invokeinterface:
|
|
2369 // for final target we still produce an inline cache, in order
|
|
2370 // to be able to call mixed mode
|
|
2371 if (x->code() == Bytecodes::_invokespecial || optimized) {
|
|
2372 __ call_opt_virtual(x->target(), receiver, result_register,
|
|
2373 SharedRuntime::get_resolve_opt_virtual_call_stub(),
|
|
2374 arg_list, info);
|
|
2375 } else if (x->vtable_index() < 0) {
|
|
2376 __ call_icvirtual(x->target(), receiver, result_register,
|
|
2377 SharedRuntime::get_resolve_virtual_call_stub(),
|
|
2378 arg_list, info);
|
|
2379 } else {
|
|
2380 int entry_offset = instanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size();
|
|
2381 int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes();
|
|
2382 __ call_virtual(x->target(), receiver, result_register, vtable_offset, arg_list, info);
|
|
2383 }
|
|
2384 break;
|
|
2385 default:
|
|
2386 ShouldNotReachHere();
|
|
2387 break;
|
|
2388 }
|
|
2389
|
|
2390 if (x->type()->is_float() || x->type()->is_double()) {
|
|
2391 // Force rounding of results from non-strictfp when in strictfp
|
|
2392 // scope (or when we don't know the strictness of the callee, to
|
|
2393 // be safe.)
|
|
2394 if (method()->is_strict()) {
|
|
2395 if (!x->target_is_loaded() || !x->target_is_strictfp()) {
|
|
2396 result_register = round_item(result_register);
|
|
2397 }
|
|
2398 }
|
|
2399 }
|
|
2400
|
|
2401 if (result_register->is_valid()) {
|
|
2402 LIR_Opr result = rlock_result(x);
|
|
2403 __ move(result_register, result);
|
|
2404 }
|
|
2405 }
|
|
2406
|
|
2407
|
|
2408 void LIRGenerator::do_FPIntrinsics(Intrinsic* x) {
|
|
2409 assert(x->number_of_arguments() == 1, "wrong type");
|
|
2410 LIRItem value (x->argument_at(0), this);
|
|
2411 LIR_Opr reg = rlock_result(x);
|
|
2412 value.load_item();
|
|
2413 LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type()));
|
|
2414 __ move(tmp, reg);
|
|
2415 }
|
|
2416
|
|
2417
|
|
2418
|
|
2419 // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval()
|
|
2420 void LIRGenerator::do_IfOp(IfOp* x) {
|
|
2421 #ifdef ASSERT
|
|
2422 {
|
|
2423 ValueTag xtag = x->x()->type()->tag();
|
|
2424 ValueTag ttag = x->tval()->type()->tag();
|
|
2425 assert(xtag == intTag || xtag == objectTag, "cannot handle others");
|
|
2426 assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others");
|
|
2427 assert(ttag == x->fval()->type()->tag(), "cannot handle others");
|
|
2428 }
|
|
2429 #endif
|
|
2430
|
|
2431 LIRItem left(x->x(), this);
|
|
2432 LIRItem right(x->y(), this);
|
|
2433 left.load_item();
|
|
2434 if (can_inline_as_constant(right.value())) {
|
|
2435 right.dont_load_item();
|
|
2436 } else {
|
|
2437 right.load_item();
|
|
2438 }
|
|
2439
|
|
2440 LIRItem t_val(x->tval(), this);
|
|
2441 LIRItem f_val(x->fval(), this);
|
|
2442 t_val.dont_load_item();
|
|
2443 f_val.dont_load_item();
|
|
2444 LIR_Opr reg = rlock_result(x);
|
|
2445
|
|
2446 __ cmp(lir_cond(x->cond()), left.result(), right.result());
|
|
2447 __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg);
|
|
2448 }
|
|
2449
|
|
2450
|
|
2451 void LIRGenerator::do_Intrinsic(Intrinsic* x) {
|
|
2452 switch (x->id()) {
|
|
2453 case vmIntrinsics::_intBitsToFloat :
|
|
2454 case vmIntrinsics::_doubleToRawLongBits :
|
|
2455 case vmIntrinsics::_longBitsToDouble :
|
|
2456 case vmIntrinsics::_floatToRawIntBits : {
|
|
2457 do_FPIntrinsics(x);
|
|
2458 break;
|
|
2459 }
|
|
2460
|
|
2461 case vmIntrinsics::_currentTimeMillis: {
|
|
2462 assert(x->number_of_arguments() == 0, "wrong type");
|
|
2463 LIR_Opr reg = result_register_for(x->type());
|
|
2464 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, os::javaTimeMillis), getThreadTemp(),
|
|
2465 reg, new LIR_OprList());
|
|
2466 LIR_Opr result = rlock_result(x);
|
|
2467 __ move(reg, result);
|
|
2468 break;
|
|
2469 }
|
|
2470
|
|
2471 case vmIntrinsics::_nanoTime: {
|
|
2472 assert(x->number_of_arguments() == 0, "wrong type");
|
|
2473 LIR_Opr reg = result_register_for(x->type());
|
|
2474 __ call_runtime_leaf(CAST_FROM_FN_PTR(address, os::javaTimeNanos), getThreadTemp(),
|
|
2475 reg, new LIR_OprList());
|
|
2476 LIR_Opr result = rlock_result(x);
|
|
2477 __ move(reg, result);
|
|
2478 break;
|
|
2479 }
|
|
2480
|
|
2481 case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break;
|
|
2482 case vmIntrinsics::_getClass: do_getClass(x); break;
|
|
2483 case vmIntrinsics::_currentThread: do_currentThread(x); break;
|
|
2484
|
|
2485 case vmIntrinsics::_dlog: // fall through
|
|
2486 case vmIntrinsics::_dlog10: // fall through
|
|
2487 case vmIntrinsics::_dabs: // fall through
|
|
2488 case vmIntrinsics::_dsqrt: // fall through
|
|
2489 case vmIntrinsics::_dtan: // fall through
|
|
2490 case vmIntrinsics::_dsin : // fall through
|
|
2491 case vmIntrinsics::_dcos : do_MathIntrinsic(x); break;
|
|
2492 case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break;
|
|
2493
|
|
2494 // java.nio.Buffer.checkIndex
|
|
2495 case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break;
|
|
2496
|
|
2497 case vmIntrinsics::_compareAndSwapObject:
|
|
2498 do_CompareAndSwap(x, objectType);
|
|
2499 break;
|
|
2500 case vmIntrinsics::_compareAndSwapInt:
|
|
2501 do_CompareAndSwap(x, intType);
|
|
2502 break;
|
|
2503 case vmIntrinsics::_compareAndSwapLong:
|
|
2504 do_CompareAndSwap(x, longType);
|
|
2505 break;
|
|
2506
|
|
2507 // sun.misc.AtomicLongCSImpl.attemptUpdate
|
|
2508 case vmIntrinsics::_attemptUpdate:
|
|
2509 do_AttemptUpdate(x);
|
|
2510 break;
|
|
2511
|
|
2512 default: ShouldNotReachHere(); break;
|
|
2513 }
|
|
2514 }
|
|
2515
|
|
2516
|
|
2517 void LIRGenerator::do_ProfileCall(ProfileCall* x) {
|
|
2518 // Need recv in a temporary register so it interferes with the other temporaries
|
|
2519 LIR_Opr recv = LIR_OprFact::illegalOpr;
|
|
2520 LIR_Opr mdo = new_register(T_OBJECT);
|
|
2521 LIR_Opr tmp = new_register(T_INT);
|
|
2522 if (x->recv() != NULL) {
|
|
2523 LIRItem value(x->recv(), this);
|
|
2524 value.load_item();
|
|
2525 recv = new_register(T_OBJECT);
|
|
2526 __ move(value.result(), recv);
|
|
2527 }
|
|
2528 __ profile_call(x->method(), x->bci_of_invoke(), mdo, recv, tmp, x->known_holder());
|
|
2529 }
|
|
2530
|
|
2531
|
|
2532 void LIRGenerator::do_ProfileCounter(ProfileCounter* x) {
|
|
2533 LIRItem mdo(x->mdo(), this);
|
|
2534 mdo.load_item();
|
|
2535
|
|
2536 increment_counter(new LIR_Address(mdo.result(), x->offset(), T_INT), x->increment());
|
|
2537 }
|
|
2538
|
|
2539
|
|
2540 LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) {
|
|
2541 LIRItemList args(1);
|
|
2542 LIRItem value(arg1, this);
|
|
2543 args.append(&value);
|
|
2544 BasicTypeList signature;
|
|
2545 signature.append(as_BasicType(arg1->type()));
|
|
2546
|
|
2547 return call_runtime(&signature, &args, entry, result_type, info);
|
|
2548 }
|
|
2549
|
|
2550
|
|
2551 LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) {
|
|
2552 LIRItemList args(2);
|
|
2553 LIRItem value1(arg1, this);
|
|
2554 LIRItem value2(arg2, this);
|
|
2555 args.append(&value1);
|
|
2556 args.append(&value2);
|
|
2557 BasicTypeList signature;
|
|
2558 signature.append(as_BasicType(arg1->type()));
|
|
2559 signature.append(as_BasicType(arg2->type()));
|
|
2560
|
|
2561 return call_runtime(&signature, &args, entry, result_type, info);
|
|
2562 }
|
|
2563
|
|
2564
|
|
2565 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args,
|
|
2566 address entry, ValueType* result_type, CodeEmitInfo* info) {
|
|
2567 // get a result register
|
|
2568 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
|
|
2569 LIR_Opr result = LIR_OprFact::illegalOpr;
|
|
2570 if (result_type->tag() != voidTag) {
|
|
2571 result = new_register(result_type);
|
|
2572 phys_reg = result_register_for(result_type);
|
|
2573 }
|
|
2574
|
|
2575 // move the arguments into the correct location
|
|
2576 CallingConvention* cc = frame_map()->c_calling_convention(signature);
|
|
2577 assert(cc->length() == args->length(), "argument mismatch");
|
|
2578 for (int i = 0; i < args->length(); i++) {
|
|
2579 LIR_Opr arg = args->at(i);
|
|
2580 LIR_Opr loc = cc->at(i);
|
|
2581 if (loc->is_register()) {
|
|
2582 __ move(arg, loc);
|
|
2583 } else {
|
|
2584 LIR_Address* addr = loc->as_address_ptr();
|
|
2585 // if (!can_store_as_constant(arg)) {
|
|
2586 // LIR_Opr tmp = new_register(arg->type());
|
|
2587 // __ move(arg, tmp);
|
|
2588 // arg = tmp;
|
|
2589 // }
|
|
2590 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
|
|
2591 __ unaligned_move(arg, addr);
|
|
2592 } else {
|
|
2593 __ move(arg, addr);
|
|
2594 }
|
|
2595 }
|
|
2596 }
|
|
2597
|
|
2598 if (info) {
|
|
2599 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
|
|
2600 } else {
|
|
2601 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
|
|
2602 }
|
|
2603 if (result->is_valid()) {
|
|
2604 __ move(phys_reg, result);
|
|
2605 }
|
|
2606 return result;
|
|
2607 }
|
|
2608
|
|
2609
|
|
2610 LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args,
|
|
2611 address entry, ValueType* result_type, CodeEmitInfo* info) {
|
|
2612 // get a result register
|
|
2613 LIR_Opr phys_reg = LIR_OprFact::illegalOpr;
|
|
2614 LIR_Opr result = LIR_OprFact::illegalOpr;
|
|
2615 if (result_type->tag() != voidTag) {
|
|
2616 result = new_register(result_type);
|
|
2617 phys_reg = result_register_for(result_type);
|
|
2618 }
|
|
2619
|
|
2620 // move the arguments into the correct location
|
|
2621 CallingConvention* cc = frame_map()->c_calling_convention(signature);
|
|
2622
|
|
2623 assert(cc->length() == args->length(), "argument mismatch");
|
|
2624 for (int i = 0; i < args->length(); i++) {
|
|
2625 LIRItem* arg = args->at(i);
|
|
2626 LIR_Opr loc = cc->at(i);
|
|
2627 if (loc->is_register()) {
|
|
2628 arg->load_item_force(loc);
|
|
2629 } else {
|
|
2630 LIR_Address* addr = loc->as_address_ptr();
|
|
2631 arg->load_for_store(addr->type());
|
|
2632 if (addr->type() == T_LONG || addr->type() == T_DOUBLE) {
|
|
2633 __ unaligned_move(arg->result(), addr);
|
|
2634 } else {
|
|
2635 __ move(arg->result(), addr);
|
|
2636 }
|
|
2637 }
|
|
2638 }
|
|
2639
|
|
2640 if (info) {
|
|
2641 __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info);
|
|
2642 } else {
|
|
2643 __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args());
|
|
2644 }
|
|
2645 if (result->is_valid()) {
|
|
2646 __ move(phys_reg, result);
|
|
2647 }
|
|
2648 return result;
|
|
2649 }
|
|
2650
|
|
2651
|
|
2652
|
|
2653 void LIRGenerator::increment_invocation_counter(CodeEmitInfo* info, bool backedge) {
|
|
2654 #ifdef TIERED
|
|
2655 if (_compilation->env()->comp_level() == CompLevel_fast_compile &&
|
|
2656 (method()->code_size() >= Tier1BytecodeLimit || backedge)) {
|
|
2657 int limit = InvocationCounter::Tier1InvocationLimit;
|
|
2658 int offset = in_bytes(methodOopDesc::invocation_counter_offset() +
|
|
2659 InvocationCounter::counter_offset());
|
|
2660 if (backedge) {
|
|
2661 limit = InvocationCounter::Tier1BackEdgeLimit;
|
|
2662 offset = in_bytes(methodOopDesc::backedge_counter_offset() +
|
|
2663 InvocationCounter::counter_offset());
|
|
2664 }
|
|
2665
|
|
2666 LIR_Opr meth = new_register(T_OBJECT);
|
|
2667 __ oop2reg(method()->encoding(), meth);
|
|
2668 LIR_Opr result = increment_and_return_counter(meth, offset, InvocationCounter::count_increment);
|
|
2669 __ cmp(lir_cond_aboveEqual, result, LIR_OprFact::intConst(limit));
|
|
2670 CodeStub* overflow = new CounterOverflowStub(info, info->bci());
|
|
2671 __ branch(lir_cond_aboveEqual, T_INT, overflow);
|
|
2672 __ branch_destination(overflow->continuation());
|
|
2673 }
|
|
2674 #endif
|
|
2675 }
|