0
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1 /*
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2 * Copyright 1997-2006 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 class BytecodeParseHistogram;
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26 class InlineTree;
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27 class Parse;
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28 class SwitchRange;
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29
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30
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31 //------------------------------InlineTree-------------------------------------
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32 class InlineTree : public ResourceObj {
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33 Compile* C; // cache
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34 JVMState* _caller_jvms; // state of caller
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35 ciMethod* _method; // method being called by the caller_jvms
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36 InlineTree* _caller_tree;
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37 uint _count_inline_bcs; // Accumulated count of inlined bytecodes
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38 // Call-site count / interpreter invocation count, scaled recursively.
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39 // Always between 0.0 and 1.0. Represents the percentage of the method's
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40 // total execution time used at this call site.
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41 const float _site_invoke_ratio;
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42 float compute_callee_frequency( int caller_bci ) const;
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43
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44 GrowableArray<InlineTree*> _subtrees;
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45 friend class Compile;
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46
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47 protected:
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48 InlineTree(Compile* C,
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49 const InlineTree* caller_tree,
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50 ciMethod* callee_method,
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51 JVMState* caller_jvms,
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52 int caller_bci,
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53 float site_invoke_ratio);
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54 InlineTree *build_inline_tree_for_callee(ciMethod* callee_method,
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55 JVMState* caller_jvms,
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56 int caller_bci);
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57 const char* try_to_inline(ciMethod* callee_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result);
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58 const char* shouldInline(ciMethod* callee_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const;
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59 const char* shouldNotInline(ciMethod* callee_method, WarmCallInfo* wci_result) const;
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60 void print_inlining(ciMethod *callee_method, int caller_bci, const char *failure_msg) const PRODUCT_RETURN;
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61
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62 InlineTree *caller_tree() const { return _caller_tree; }
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63 InlineTree* callee_at(int bci, ciMethod* m) const;
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64 int inline_depth() const { return _caller_jvms ? _caller_jvms->depth() : 0; }
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65
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66 public:
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67 static InlineTree* build_inline_tree_root();
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68 static InlineTree* find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found = false);
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69
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70 // For temporary (stack-allocated, stateless) ilts:
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71 InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, float site_invoke_ratio);
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72
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73 // InlineTree enum
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74 enum InlineStyle {
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75 Inline_do_not_inline = 0, //
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76 Inline_cha_is_monomorphic = 1, //
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77 Inline_type_profile_monomorphic = 2 //
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78 };
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79
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80 // See if it is OK to inline.
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81 // The reciever is the inline tree for the caller.
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82 //
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83 // The result is a temperature indication. If it is hot or cold,
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84 // inlining is immediate or undesirable. Otherwise, the info block
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85 // returned is newly allocated and may be enqueued.
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86 //
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87 // If the method is inlinable, a new inline subtree is created on the fly,
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88 // and may be accessed by find_subtree_from_root.
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89 // The call_method is the dest_method for a special or static invocation.
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90 // The call_method is an optimized virtual method candidate otherwise.
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91 WarmCallInfo* ok_to_inline(ciMethod *call_method, JVMState* caller_jvms, ciCallProfile& profile, WarmCallInfo* wci);
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92
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93 // Information about inlined method
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94 JVMState* caller_jvms() const { return _caller_jvms; }
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95 ciMethod *method() const { return _method; }
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96 int caller_bci() const { return _caller_jvms ? _caller_jvms->bci() : InvocationEntryBci; }
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97 uint count_inline_bcs() const { return _count_inline_bcs; }
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98 float site_invoke_ratio() const { return _site_invoke_ratio; };
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99
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100 #ifndef PRODUCT
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101 private:
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102 uint _count_inlines; // Count of inlined methods
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103 public:
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104 // Debug information collected during parse
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105 uint count_inlines() const { return _count_inlines; };
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106 #endif
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107 GrowableArray<InlineTree*> subtrees() { return _subtrees; }
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108 };
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109
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110
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111 //-----------------------------------------------------------------------------
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112 //------------------------------Parse------------------------------------------
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113 // Parse bytecodes, build a Graph
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114 class Parse : public GraphKit {
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115 public:
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116 // Per-block information needed by the parser:
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117 class Block {
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118 private:
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119 ciTypeFlow::Block* _flow;
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120 int _pred_count; // how many predecessors in CFG?
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121 int _preds_parsed; // how many of these have been parsed?
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122 uint _count; // how many times executed? Currently only set by _goto's
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123 bool _is_parsed; // has this block been parsed yet?
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124 bool _is_handler; // is this block an exception handler?
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125 SafePointNode* _start_map; // all values flowing into this block
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126 MethodLivenessResult _live_locals; // lazily initialized liveness bitmap
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127
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128 int _num_successors; // Includes only normal control flow.
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129 int _all_successors; // Include exception paths also.
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130 Block** _successors;
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131
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132 // Use init_node/init_graph to initialize Blocks.
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133 // Block() : _live_locals((uintptr_t*)NULL,0) { ShouldNotReachHere(); }
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134 Block() : _live_locals(NULL,0) { ShouldNotReachHere(); }
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135
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136 public:
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137
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138 // Set up the block data structure itself.
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139 void init_node(Parse* outer, int po);
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140 // Set up the block's relations to other blocks.
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141 void init_graph(Parse* outer);
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142
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143 ciTypeFlow::Block* flow() const { return _flow; }
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144 int pred_count() const { return _pred_count; }
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145 int preds_parsed() const { return _preds_parsed; }
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146 bool is_parsed() const { return _is_parsed; }
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147 bool is_handler() const { return _is_handler; }
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148 void set_count( uint x ) { _count = x; }
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149 uint count() const { return _count; }
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150
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151 SafePointNode* start_map() const { assert(is_merged(),""); return _start_map; }
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152 void set_start_map(SafePointNode* m) { assert(!is_merged(), ""); _start_map = m; }
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153
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154 // True after any predecessor flows control into this block
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155 bool is_merged() const { return _start_map != NULL; }
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156
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157 // True when all non-exception predecessors have been parsed.
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158 bool is_ready() const { return preds_parsed() == pred_count(); }
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159
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160 int num_successors() const { return _num_successors; }
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161 int all_successors() const { return _all_successors; }
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162 Block* successor_at(int i) const {
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163 assert((uint)i < (uint)all_successors(), "");
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164 return _successors[i];
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165 }
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166 Block* successor_for_bci(int bci);
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167
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168 int start() const { return flow()->start(); }
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169 int limit() const { return flow()->limit(); }
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170 int pre_order() const { return flow()->pre_order(); }
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171 int start_sp() const { return flow()->stack_size(); }
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172
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173 const Type* peek(int off=0) const { return stack_type_at(start_sp() - (off+1)); }
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174
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175 const Type* stack_type_at(int i) const;
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176 const Type* local_type_at(int i) const;
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177 static const Type* get_type(ciType* t) { return Type::get_typeflow_type(t); }
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178
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179 bool has_trap_at(int bci) const { return flow()->has_trap() && flow()->trap_bci() == bci; }
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180
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181 // Call this just before parsing a block.
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182 void mark_parsed() {
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183 assert(!_is_parsed, "must parse each block exactly once");
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184 _is_parsed = true;
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185 }
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186
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187 // Return the phi/region input index for the "current" pred,
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188 // and bump the pred number. For historical reasons these index
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189 // numbers are handed out in descending order. The last index is
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190 // always PhiNode::Input (i.e., 1). The value returned is known
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191 // as a "path number" because it distinguishes by which path we are
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192 // entering the block.
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193 int next_path_num() {
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194 assert(preds_parsed() < pred_count(), "too many preds?");
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195 return pred_count() - _preds_parsed++;
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196 }
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197
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198 // Add a previously unaccounted predecessor to this block.
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199 // This operates by increasing the size of the block's region
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200 // and all its phi nodes (if any). The value returned is a
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201 // path number ("pnum").
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202 int add_new_path();
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203
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204 // Initialize me by recording the parser's map. My own map must be NULL.
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205 void record_state(Parse* outer);
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206 };
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207
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208 #ifndef PRODUCT
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209 // BytecodeParseHistogram collects number of bytecodes parsed, nodes constructed, and transformations.
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210 class BytecodeParseHistogram : public ResourceObj {
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211 private:
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212 enum BPHType {
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213 BPH_transforms,
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214 BPH_values
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215 };
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216 static bool _initialized;
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217 static uint _bytecodes_parsed [Bytecodes::number_of_codes];
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218 static uint _nodes_constructed[Bytecodes::number_of_codes];
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219 static uint _nodes_transformed[Bytecodes::number_of_codes];
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220 static uint _new_values [Bytecodes::number_of_codes];
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221
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222 Bytecodes::Code _initial_bytecode;
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223 int _initial_node_count;
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224 int _initial_transforms;
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225 int _initial_values;
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226
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227 Parse *_parser;
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228 Compile *_compiler;
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229
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230 // Initialization
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231 static void reset();
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232
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233 // Return info being collected, select with global flag 'BytecodeParseInfo'
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234 int current_count(BPHType info_selector);
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235
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236 public:
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237 BytecodeParseHistogram(Parse *p, Compile *c);
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238 static bool initialized();
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239
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240 // Record info when starting to parse one bytecode
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241 void set_initial_state( Bytecodes::Code bc );
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242 // Record results of parsing one bytecode
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243 void record_change();
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244
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245 // Profile printing
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246 static void print(float cutoff = 0.01F); // cutoff in percent
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247 };
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248
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249 public:
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250 // Record work done during parsing
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251 BytecodeParseHistogram* _parse_histogram;
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252 void set_parse_histogram(BytecodeParseHistogram *bph) { _parse_histogram = bph; }
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253 BytecodeParseHistogram* parse_histogram() { return _parse_histogram; }
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254 #endif
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255
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256 private:
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257 friend class Block;
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258
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259 // Variables which characterize this compilation as a whole:
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260
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261 JVMState* _caller; // JVMS which carries incoming args & state.
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262 float _expected_uses; // expected number of calls to this code
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263 float _prof_factor; // discount applied to my profile counts
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264 int _depth; // Inline tree depth, for debug printouts
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265 const TypeFunc*_tf; // My kind of function type
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266 int _entry_bci; // the osr bci or InvocationEntryBci
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267
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268 ciTypeFlow* _flow; // Results of previous flow pass.
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269 Block* _blocks; // Array of basic-block structs.
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270 int _block_count; // Number of elements in _blocks.
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271
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272 GraphKit _exits; // Record all normal returns and throws here.
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273 bool _wrote_final; // Did we write a final field?
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274 bool _count_invocations; // update and test invocation counter
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275 bool _method_data_update; // update method data oop
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276
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277 // Variables which track Java semantics during bytecode parsing:
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278
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279 Block* _block; // block currently getting parsed
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280 ciBytecodeStream _iter; // stream of this method's bytecodes
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281
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282 int _blocks_merged; // Progress meter: state merges from BB preds
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283 int _blocks_parsed; // Progress meter: BBs actually parsed
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284
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285 const FastLockNode* _synch_lock; // FastLockNode for synchronized method
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286
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287 #ifndef PRODUCT
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288 int _max_switch_depth; // Debugging SwitchRanges.
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289 int _est_switch_depth; // Debugging SwitchRanges.
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290 #endif
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291
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292 public:
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293 // Constructor
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294 Parse(JVMState* caller, ciMethod* parse_method, float expected_uses);
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295
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296 virtual Parse* is_Parse() const { return (Parse*)this; }
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297
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298 public:
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299 // Accessors.
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300 JVMState* caller() const { return _caller; }
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301 float expected_uses() const { return _expected_uses; }
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302 float prof_factor() const { return _prof_factor; }
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303 int depth() const { return _depth; }
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304 const TypeFunc* tf() const { return _tf; }
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305 // entry_bci() -- see osr_bci, etc.
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306
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307 ciTypeFlow* flow() const { return _flow; }
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308 // blocks() -- see pre_order_at, start_block, etc.
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309 int block_count() const { return _block_count; }
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310
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311 GraphKit& exits() { return _exits; }
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312 bool wrote_final() const { return _wrote_final; }
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313 void set_wrote_final(bool z) { _wrote_final = z; }
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314 bool count_invocations() const { return _count_invocations; }
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315 bool method_data_update() const { return _method_data_update; }
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316
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317 Block* block() const { return _block; }
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318 ciBytecodeStream& iter() { return _iter; }
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319 Bytecodes::Code bc() const { return _iter.cur_bc(); }
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320
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321 void set_block(Block* b) { _block = b; }
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322
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323 // Derived accessors:
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324 bool is_normal_parse() const { return _entry_bci == InvocationEntryBci; }
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325 bool is_osr_parse() const { return _entry_bci != InvocationEntryBci; }
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326 int osr_bci() const { assert(is_osr_parse(),""); return _entry_bci; }
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327
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328 void set_parse_bci(int bci);
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329
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330 // Must this parse be aborted?
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331 bool failing() { return C->failing(); }
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332
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333 Block* pre_order_at(int po) {
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334 assert(0 <= po && po < _block_count, "oob");
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335 return &_blocks[po];
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336 }
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337 Block* start_block() {
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338 return pre_order_at(flow()->start_block()->pre_order());
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339 }
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340 // Can return NULL if the flow pass did not complete a block.
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341 Block* successor_for_bci(int bci) {
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342 return block()->successor_for_bci(bci);
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343 }
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344
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345 private:
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346 // Create a JVMS & map for the initial state of this method.
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347 SafePointNode* create_entry_map();
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348
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349 // OSR helpers
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350 Node *fetch_interpreter_state(int index, BasicType bt, Node *local_addrs, Node *local_addrs_base);
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351 Node* check_interpreter_type(Node* l, const Type* type, SafePointNode* &bad_type_exit);
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352 void load_interpreter_state(Node* osr_buf);
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353
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354 // Functions for managing basic blocks:
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355 void init_blocks();
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356 void load_state_from(Block* b);
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357 void store_state_to(Block* b) { b->record_state(this); }
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358
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359 // Parse all the basic blocks.
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360 void do_all_blocks();
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361
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362 // Helper for do_all_blocks; makes one pass in pre-order.
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363 void visit_blocks();
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364
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365 // Parse the current basic block
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366 void do_one_block();
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367
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368 // Raise an error if we get a bad ciTypeFlow CFG.
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369 void handle_missing_successor(int bci);
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370
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371 // first actions (before BCI 0)
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372 void do_method_entry();
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373
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374 // implementation of monitorenter/monitorexit
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375 void do_monitor_enter();
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376 void do_monitor_exit();
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377
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378 // Eagerly create phie throughout the state, to cope with back edges.
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379 void ensure_phis_everywhere();
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380
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381 // Merge the current mapping into the basic block starting at bci
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382 void merge( int target_bci);
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383 // Same as plain merge, except that it allocates a new path number.
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384 void merge_new_path( int target_bci);
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385 // Merge the current mapping into an exception handler.
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386 void merge_exception(int target_bci);
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387 // Helper: Merge the current mapping into the given basic block
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388 void merge_common(Block* target, int pnum);
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389 // Helper functions for merging individual cells.
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390 PhiNode *ensure_phi( int idx, bool nocreate = false);
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391 PhiNode *ensure_memory_phi(int idx, bool nocreate = false);
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392 // Helper to merge the current memory state into the given basic block
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393 void merge_memory_edges(MergeMemNode* n, int pnum, bool nophi);
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394
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395 // Parse this bytecode, and alter the Parsers JVM->Node mapping
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396 void do_one_bytecode();
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397
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398 // helper function to generate array store check
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399 void array_store_check();
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400 // Helper function to generate array load
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401 void array_load(BasicType etype);
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402 // Helper function to generate array store
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403 void array_store(BasicType etype);
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404 // Helper function to compute array addressing
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405 Node* array_addressing(BasicType type, int vals, const Type* *result2=NULL);
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406
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407 // Pass current map to exits
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408 void return_current(Node* value);
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409
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410 // Register finalizers on return from Object.<init>
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411 void call_register_finalizer();
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412
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413 // Insert a compiler safepoint into the graph
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414 void add_safepoint();
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415
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416 // Insert a compiler safepoint into the graph, if there is a back-branch.
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417 void maybe_add_safepoint(int target_bci) {
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418 if (UseLoopSafepoints && target_bci <= bci()) {
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419 add_safepoint();
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420 }
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421 }
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422
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423 // Note: Intrinsic generation routines may be found in library_call.cpp.
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424
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425 // Helper function to setup Ideal Call nodes
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426 void do_call();
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427
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428 // Helper function to uncommon-trap or bailout for non-compilable call-sites
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429 bool can_not_compile_call_site(ciMethod *dest_method, ciInstanceKlass *klass);
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430
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431 // Helper function to identify inlining potential at call-site
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432 ciMethod* optimize_inlining(ciMethod* caller, int bci, ciInstanceKlass* klass,
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433 ciMethod *dest_method, const TypeOopPtr* receiver_type);
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434
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435 // Helper function to setup for type-profile based inlining
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436 bool prepare_type_profile_inline(ciInstanceKlass* prof_klass, ciMethod* prof_method);
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437
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438 // Helper functions for type checking bytecodes:
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439 void do_checkcast();
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440 void do_instanceof();
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441
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442 // Helper functions for shifting & arithmetic
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443 void modf();
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444 void modd();
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445 void l2f();
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446
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447 void do_irem();
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448
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449 // implementation of _get* and _put* bytecodes
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450 void do_getstatic() { do_field_access(true, false); }
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451 void do_getfield () { do_field_access(true, true); }
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452 void do_putstatic() { do_field_access(false, false); }
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453 void do_putfield () { do_field_access(false, true); }
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454
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455 // common code for making initial checks and forming addresses
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456 void do_field_access(bool is_get, bool is_field);
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457 bool static_field_ok_in_clinit(ciField *field, ciMethod *method);
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458
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459 // common code for actually performing the load or store
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460 void do_get_xxx(const TypePtr* obj_type, Node* obj, ciField* field, bool is_field);
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461 void do_put_xxx(const TypePtr* obj_type, Node* obj, ciField* field, bool is_field);
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462
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463 // loading from a constant field or the constant pool
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464 // returns false if push failed (non-perm field constants only, not ldcs)
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465 bool push_constant(ciConstant con);
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466
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467 // implementation of object creation bytecodes
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468 void do_new();
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469 void do_newarray(BasicType elemtype);
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470 void do_anewarray();
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471 void do_multianewarray();
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472 Node* expand_multianewarray(ciArrayKlass* array_klass, Node* *lengths, int ndimensions);
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473
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474 // implementation of jsr/ret
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475 void do_jsr();
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476 void do_ret();
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477
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478 float dynamic_branch_prediction(float &cnt);
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479 float branch_prediction(float &cnt, BoolTest::mask btest, int target_bci);
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480 bool seems_never_taken(float prob);
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481
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482 void do_ifnull(BoolTest::mask btest);
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483 void do_if(BoolTest::mask btest, Node* c);
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484 void repush_if_args();
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485 void adjust_map_after_if(BoolTest::mask btest, Node* c, float prob,
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486 Block* path, Block* other_path);
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487 IfNode* jump_if_fork_int(Node* a, Node* b, BoolTest::mask mask);
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488 Node* jump_if_join(Node* iffalse, Node* iftrue);
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489 void jump_if_true_fork(IfNode *ifNode, int dest_bci_if_true, int prof_table_index);
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490 void jump_if_false_fork(IfNode *ifNode, int dest_bci_if_false, int prof_table_index);
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491 void jump_if_always_fork(int dest_bci_if_true, int prof_table_index);
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492
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493 friend class SwitchRange;
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494 void do_tableswitch();
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495 void do_lookupswitch();
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496 void jump_switch_ranges(Node* a, SwitchRange* lo, SwitchRange* hi, int depth = 0);
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497 bool create_jump_tables(Node* a, SwitchRange* lo, SwitchRange* hi);
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498
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499 // helper functions for methodData style profiling
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500 void test_counter_against_threshold(Node* cnt, int limit);
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501 void increment_and_test_invocation_counter(int limit);
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502 void test_for_osr_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize offset, int limit);
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503 Node* method_data_addressing(ciMethodData* md, ciProfileData* data, ByteSize offset, Node* idx = NULL, uint stride = 0);
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504 void increment_md_counter_at(ciMethodData* md, ciProfileData* data, ByteSize offset, Node* idx = NULL, uint stride = 0);
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505 void set_md_flag_at(ciMethodData* md, ciProfileData* data, int flag_constant);
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506
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507 void profile_method_entry();
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508 void profile_taken_branch(int target_bci, bool force_update = false);
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509 void profile_not_taken_branch(bool force_update = false);
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510 void profile_call(Node* receiver);
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511 void profile_generic_call();
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512 void profile_receiver_type(Node* receiver);
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513 void profile_ret(int target_bci);
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514 void profile_null_checkcast();
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515 void profile_switch_case(int table_index);
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516
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517 // helper function for call statistics
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|
518 void count_compiled_calls(bool at_method_entry, bool is_inline) PRODUCT_RETURN;
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519
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520 Node_Notes* make_node_notes(Node_Notes* caller_nn);
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521
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522 // Helper functions for handling normal and abnormal exits.
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523 void build_exits();
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524
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525 // Fix up all exceptional control flow exiting a single bytecode.
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|
526 void do_exceptions();
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|
527
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528 // Fix up all exiting control flow at the end of the parse.
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|
529 void do_exits();
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|
530
|
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531 // Add Catch/CatchProjs
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|
532 // The call is either a Java call or the VM's rethrow stub
|
|
533 void catch_call_exceptions(ciExceptionHandlerStream&);
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|
534
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535 // Handle all exceptions thrown by the inlined method.
|
|
536 // Also handles exceptions for individual bytecodes.
|
|
537 void catch_inline_exceptions(SafePointNode* ex_map);
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|
538
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539 // Bytecode classifier, helps decide to use uncommon_trap vs. rethrow_C.
|
|
540 bool can_rerun_bytecode();
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|
541
|
|
542 // Merge the given map into correct exceptional exit state.
|
|
543 // Assumes that there is no applicable local handler.
|
|
544 void throw_to_exit(SafePointNode* ex_map);
|
|
545
|
|
546 public:
|
|
547 #ifndef PRODUCT
|
|
548 // Handle PrintOpto, etc.
|
|
549 void show_parse_info();
|
|
550 void dump_map_adr_mem() const;
|
|
551 static void print_statistics(); // Print some performance counters
|
|
552 void dump();
|
|
553 void dump_bci(int bci);
|
|
554 #endif
|
|
555 };
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