annotate src/share/vm/opto/compile.hpp @ 948:89e0543e1737

6884624: Update copyright year Summary: Update copyright for files that have been modified in 2009 through Septermber Reviewed-by: tbell, ohair
author xdono
date Tue, 22 Sep 2009 14:06:10 -0700
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1 /*
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89e0543e1737 6884624: Update copyright year
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2 * Copyright 1997-2009 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 Block;
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26 class Bundle;
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27 class C2Compiler;
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28 class CallGenerator;
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29 class ConnectionGraph;
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30 class InlineTree;
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31 class Int_Array;
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32 class Matcher;
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33 class MachNode;
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34 class MachSafePointNode;
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35 class Node;
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36 class Node_Array;
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37 class Node_Notes;
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38 class OptoReg;
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39 class PhaseCFG;
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40 class PhaseGVN;
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41 class PhaseRegAlloc;
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42 class PhaseCCP;
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43 class PhaseCCP_DCE;
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44 class RootNode;
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45 class relocInfo;
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46 class Scope;
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47 class StartNode;
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48 class SafePointNode;
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49 class JVMState;
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50 class TypeData;
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51 class TypePtr;
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52 class TypeFunc;
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53 class Unique_Node_List;
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54 class nmethod;
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55 class WarmCallInfo;
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56
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57 //------------------------------Compile----------------------------------------
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58 // This class defines a top-level Compiler invocation.
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59
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60 class Compile : public Phase {
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61 public:
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62 // Fixed alias indexes. (See also MergeMemNode.)
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63 enum {
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64 AliasIdxTop = 1, // pseudo-index, aliases to nothing (used as sentinel value)
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65 AliasIdxBot = 2, // pseudo-index, aliases to everything
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66 AliasIdxRaw = 3 // hard-wired index for TypeRawPtr::BOTTOM
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67 };
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68
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69 // Variant of TraceTime(NULL, &_t_accumulator, TimeCompiler);
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70 // Integrated with logging. If logging is turned on, and dolog is true,
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71 // then brackets are put into the log, with time stamps and node counts.
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72 // (The time collection itself is always conditionalized on TimeCompiler.)
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73 class TracePhase : public TraceTime {
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74 private:
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75 Compile* C;
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76 CompileLog* _log;
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77 public:
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78 TracePhase(const char* name, elapsedTimer* accumulator, bool dolog);
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79 ~TracePhase();
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80 };
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81
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82 // Information per category of alias (memory slice)
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83 class AliasType {
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84 private:
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85 friend class Compile;
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86
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87 int _index; // unique index, used with MergeMemNode
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88 const TypePtr* _adr_type; // normalized address type
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89 ciField* _field; // relevant instance field, or null if none
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90 bool _is_rewritable; // false if the memory is write-once only
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91 int _general_index; // if this is type is an instance, the general
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92 // type that this is an instance of
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93
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94 void Init(int i, const TypePtr* at);
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95
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96 public:
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97 int index() const { return _index; }
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98 const TypePtr* adr_type() const { return _adr_type; }
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99 ciField* field() const { return _field; }
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100 bool is_rewritable() const { return _is_rewritable; }
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101 bool is_volatile() const { return (_field ? _field->is_volatile() : false); }
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102 int general_index() const { return (_general_index != 0) ? _general_index : _index; }
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103
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104 void set_rewritable(bool z) { _is_rewritable = z; }
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105 void set_field(ciField* f) {
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106 assert(!_field,"");
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107 _field = f;
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108 if (f->is_final()) _is_rewritable = false;
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109 }
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110
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111 void print_on(outputStream* st) PRODUCT_RETURN;
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112 };
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113
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114 enum {
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115 logAliasCacheSize = 6,
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116 AliasCacheSize = (1<<logAliasCacheSize)
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117 };
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118 struct AliasCacheEntry { const TypePtr* _adr_type; int _index; }; // simple duple type
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119 enum {
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120 trapHistLength = methodDataOopDesc::_trap_hist_limit
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121 };
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122
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123 private:
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124 // Fixed parameters to this compilation.
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125 const int _compile_id;
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126 const bool _save_argument_registers; // save/restore arg regs for trampolines
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127 const bool _subsume_loads; // Load can be matched as part of a larger op.
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128 const bool _do_escape_analysis; // Do escape analysis.
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129 ciMethod* _method; // The method being compiled.
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130 int _entry_bci; // entry bci for osr methods.
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131 const TypeFunc* _tf; // My kind of signature
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132 InlineTree* _ilt; // Ditto (temporary).
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133 address _stub_function; // VM entry for stub being compiled, or NULL
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134 const char* _stub_name; // Name of stub or adapter being compiled, or NULL
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135 address _stub_entry_point; // Compile code entry for generated stub, or NULL
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136
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137 // Control of this compilation.
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138 int _num_loop_opts; // Number of iterations for doing loop optimiztions
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139 int _max_inline_size; // Max inline size for this compilation
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140 int _freq_inline_size; // Max hot method inline size for this compilation
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141 int _fixed_slots; // count of frame slots not allocated by the register
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142 // allocator i.e. locks, original deopt pc, etc.
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143 // For deopt
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144 int _orig_pc_slot;
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145 int _orig_pc_slot_offset_in_bytes;
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146
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147 int _major_progress; // Count of something big happening
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148 bool _deopt_happens; // TRUE if de-optimization CAN happen
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149 bool _has_loops; // True if the method _may_ have some loops
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150 bool _has_split_ifs; // True if the method _may_ have some split-if
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151 bool _has_unsafe_access; // True if the method _may_ produce faults in unsafe loads or stores.
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152 uint _trap_hist[trapHistLength]; // Cumulative traps
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153 bool _trap_can_recompile; // Have we emitted a recompiling trap?
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154 uint _decompile_count; // Cumulative decompilation counts.
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155 bool _do_inlining; // True if we intend to do inlining
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156 bool _do_scheduling; // True if we intend to do scheduling
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157 bool _do_freq_based_layout; // True if we intend to do frequency based block layout
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158 bool _do_count_invocations; // True if we generate code to count invocations
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159 bool _do_method_data_update; // True if we generate code to update methodDataOops
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160 int _AliasLevel; // Locally-adjusted version of AliasLevel flag.
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161 bool _print_assembly; // True if we should dump assembly code for this compilation
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162 #ifndef PRODUCT
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163 bool _trace_opto_output;
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164 bool _parsed_irreducible_loop; // True if ciTypeFlow detected irreducible loops during parsing
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165 #endif
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166
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167 // Compilation environment.
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168 Arena _comp_arena; // Arena with lifetime equivalent to Compile
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169 ciEnv* _env; // CI interface
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170 CompileLog* _log; // from CompilerThread
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171 const char* _failure_reason; // for record_failure/failing pattern
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172 GrowableArray<CallGenerator*>* _intrinsics; // List of intrinsics.
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173 GrowableArray<Node*>* _macro_nodes; // List of nodes which need to be expanded before matching.
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174 ConnectionGraph* _congraph;
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175 #ifndef PRODUCT
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176 IdealGraphPrinter* _printer;
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177 #endif
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178
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179 // Node management
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180 uint _unique; // Counter for unique Node indices
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181 debug_only(static int _debug_idx;) // Monotonic counter (not reset), use -XX:BreakAtNode=<idx>
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182 Arena _node_arena; // Arena for new-space Nodes
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183 Arena _old_arena; // Arena for old-space Nodes, lifetime during xform
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184 RootNode* _root; // Unique root of compilation, or NULL after bail-out.
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185 Node* _top; // Unique top node. (Reset by various phases.)
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186
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187 Node* _immutable_memory; // Initial memory state
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188
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189 Node* _recent_alloc_obj;
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190 Node* _recent_alloc_ctl;
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191
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192 // Blocked array of debugging and profiling information,
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193 // tracked per node.
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194 enum { _log2_node_notes_block_size = 8,
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195 _node_notes_block_size = (1<<_log2_node_notes_block_size)
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196 };
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197 GrowableArray<Node_Notes*>* _node_note_array;
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198 Node_Notes* _default_node_notes; // default notes for new nodes
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199
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200 // After parsing and every bulk phase we hang onto the Root instruction.
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201 // The RootNode instruction is where the whole program begins. It produces
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202 // the initial Control and BOTTOM for everybody else.
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203
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204 // Type management
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205 Arena _Compile_types; // Arena for all types
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206 Arena* _type_arena; // Alias for _Compile_types except in Initialize_shared()
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207 Dict* _type_dict; // Intern table
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208 void* _type_hwm; // Last allocation (see Type::operator new/delete)
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209 size_t _type_last_size; // Last allocation size (see Type::operator new/delete)
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210 ciMethod* _last_tf_m; // Cache for
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211 const TypeFunc* _last_tf; // TypeFunc::make
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212 AliasType** _alias_types; // List of alias types seen so far.
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213 int _num_alias_types; // Logical length of _alias_types
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214 int _max_alias_types; // Physical length of _alias_types
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215 AliasCacheEntry _alias_cache[AliasCacheSize]; // Gets aliases w/o data structure walking
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216
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217 // Parsing, optimization
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218 PhaseGVN* _initial_gvn; // Results of parse-time PhaseGVN
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219 Unique_Node_List* _for_igvn; // Initial work-list for next round of Iterative GVN
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220 WarmCallInfo* _warm_calls; // Sorted work-list for heat-based inlining.
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221
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222 // Matching, CFG layout, allocation, code generation
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223 PhaseCFG* _cfg; // Results of CFG finding
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224 bool _select_24_bit_instr; // We selected an instruction with a 24-bit result
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225 bool _in_24_bit_fp_mode; // We are emitting instructions with 24-bit results
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226 int _java_calls; // Number of java calls in the method
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227 int _inner_loops; // Number of inner loops in the method
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228 Matcher* _matcher; // Engine to map ideal to machine instructions
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229 PhaseRegAlloc* _regalloc; // Results of register allocation.
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230 int _frame_slots; // Size of total frame in stack slots
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231 CodeOffsets _code_offsets; // Offsets into the code for various interesting entries
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232 RegMask _FIRST_STACK_mask; // All stack slots usable for spills (depends on frame layout)
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233 Arena* _indexSet_arena; // control IndexSet allocation within PhaseChaitin
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234 void* _indexSet_free_block_list; // free list of IndexSet bit blocks
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235
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236 uint _node_bundling_limit;
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237 Bundle* _node_bundling_base; // Information for instruction bundling
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238
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239 // Instruction bits passed off to the VM
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240 int _method_size; // Size of nmethod code segment in bytes
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241 CodeBuffer _code_buffer; // Where the code is assembled
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242 int _first_block_size; // Size of unvalidated entry point code / OSR poison code
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243 ExceptionHandlerTable _handler_table; // Table of native-code exception handlers
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244 ImplicitExceptionTable _inc_table; // Table of implicit null checks in native code
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245 OopMapSet* _oop_map_set; // Table of oop maps (one for each safepoint location)
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246 static int _CompiledZap_count; // counter compared against CompileZap[First/Last]
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247 BufferBlob* _scratch_buffer_blob; // For temporary code buffers.
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248 relocInfo* _scratch_locs_memory; // For temporary code buffers.
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249
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250 public:
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251 // Accessors
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252
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253 // The Compile instance currently active in this (compiler) thread.
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254 static Compile* current() {
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255 return (Compile*) ciEnv::current()->compiler_data();
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256 }
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257
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258 // ID for this compilation. Useful for setting breakpoints in the debugger.
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259 int compile_id() const { return _compile_id; }
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260
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261 // Does this compilation allow instructions to subsume loads? User
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262 // instructions that subsume a load may result in an unschedulable
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263 // instruction sequence.
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264 bool subsume_loads() const { return _subsume_loads; }
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265 // Do escape analysis.
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266 bool do_escape_analysis() const { return _do_escape_analysis; }
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267 bool save_argument_registers() const { return _save_argument_registers; }
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268
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269
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270 // Other fixed compilation parameters.
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271 ciMethod* method() const { return _method; }
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272 int entry_bci() const { return _entry_bci; }
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273 bool is_osr_compilation() const { return _entry_bci != InvocationEntryBci; }
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274 bool is_method_compilation() const { return (_method != NULL && !_method->flags().is_native()); }
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275 const TypeFunc* tf() const { assert(_tf!=NULL, ""); return _tf; }
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276 void init_tf(const TypeFunc* tf) { assert(_tf==NULL, ""); _tf = tf; }
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277 InlineTree* ilt() const { return _ilt; }
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278 address stub_function() const { return _stub_function; }
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279 const char* stub_name() const { return _stub_name; }
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280 address stub_entry_point() const { return _stub_entry_point; }
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281
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282 // Control of this compilation.
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283 int fixed_slots() const { assert(_fixed_slots >= 0, ""); return _fixed_slots; }
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284 void set_fixed_slots(int n) { _fixed_slots = n; }
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285 int major_progress() const { return _major_progress; }
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286 void set_major_progress() { _major_progress++; }
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287 void clear_major_progress() { _major_progress = 0; }
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288 int num_loop_opts() const { return _num_loop_opts; }
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289 void set_num_loop_opts(int n) { _num_loop_opts = n; }
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290 int max_inline_size() const { return _max_inline_size; }
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291 void set_freq_inline_size(int n) { _freq_inline_size = n; }
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292 int freq_inline_size() const { return _freq_inline_size; }
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293 void set_max_inline_size(int n) { _max_inline_size = n; }
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294 bool deopt_happens() const { return _deopt_happens; }
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295 bool has_loops() const { return _has_loops; }
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296 void set_has_loops(bool z) { _has_loops = z; }
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297 bool has_split_ifs() const { return _has_split_ifs; }
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298 void set_has_split_ifs(bool z) { _has_split_ifs = z; }
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299 bool has_unsafe_access() const { return _has_unsafe_access; }
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300 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; }
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301 void set_trap_count(uint r, uint c) { assert(r < trapHistLength, "oob"); _trap_hist[r] = c; }
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302 uint trap_count(uint r) const { assert(r < trapHistLength, "oob"); return _trap_hist[r]; }
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303 bool trap_can_recompile() const { return _trap_can_recompile; }
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304 void set_trap_can_recompile(bool z) { _trap_can_recompile = z; }
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305 uint decompile_count() const { return _decompile_count; }
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306 void set_decompile_count(uint c) { _decompile_count = c; }
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307 bool allow_range_check_smearing() const;
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308 bool do_inlining() const { return _do_inlining; }
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309 void set_do_inlining(bool z) { _do_inlining = z; }
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310 bool do_scheduling() const { return _do_scheduling; }
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311 void set_do_scheduling(bool z) { _do_scheduling = z; }
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312 bool do_freq_based_layout() const{ return _do_freq_based_layout; }
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313 void set_do_freq_based_layout(bool z){ _do_freq_based_layout = z; }
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314 bool do_count_invocations() const{ return _do_count_invocations; }
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315 void set_do_count_invocations(bool z){ _do_count_invocations = z; }
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316 bool do_method_data_update() const { return _do_method_data_update; }
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317 void set_do_method_data_update(bool z) { _do_method_data_update = z; }
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318 int AliasLevel() const { return _AliasLevel; }
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319 bool print_assembly() const { return _print_assembly; }
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320 void set_print_assembly(bool z) { _print_assembly = z; }
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321 // check the CompilerOracle for special behaviours for this compile
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322 bool method_has_option(const char * option) {
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323 return method() != NULL && method()->has_option(option);
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324 }
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325 #ifndef PRODUCT
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326 bool trace_opto_output() const { return _trace_opto_output; }
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327 bool parsed_irreducible_loop() const { return _parsed_irreducible_loop; }
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328 void set_parsed_irreducible_loop(bool z) { _parsed_irreducible_loop = z; }
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329 #endif
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330
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331 void begin_method() {
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332 #ifndef PRODUCT
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333 if (_printer) _printer->begin_method(this);
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334 #endif
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335 }
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336 void print_method(const char * name, int level = 1) {
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337 #ifndef PRODUCT
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338 if (_printer) _printer->print_method(this, name, level);
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339 #endif
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340 }
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341 void end_method() {
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342 #ifndef PRODUCT
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343 if (_printer) _printer->end_method();
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344 #endif
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345 }
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346
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347 int macro_count() { return _macro_nodes->length(); }
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348 Node* macro_node(int idx) { return _macro_nodes->at(idx); }
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349 ConnectionGraph* congraph() { return _congraph;}
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350 void add_macro_node(Node * n) {
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351 //assert(n->is_macro(), "must be a macro node");
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352 assert(!_macro_nodes->contains(n), " duplicate entry in expand list");
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353 _macro_nodes->append(n);
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354 }
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355 void remove_macro_node(Node * n) {
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356 // this function may be called twice for a node so check
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357 // that the node is in the array before attempting to remove it
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358 if (_macro_nodes->contains(n))
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359 _macro_nodes->remove(n);
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360 }
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361
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362 // Compilation environment.
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363 Arena* comp_arena() { return &_comp_arena; }
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364 ciEnv* env() const { return _env; }
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365 CompileLog* log() const { return _log; }
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366 bool failing() const { return _env->failing() || _failure_reason != NULL; }
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367 const char* failure_reason() { return _failure_reason; }
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368 bool failure_reason_is(const char* r) { return (r==_failure_reason) || (r!=NULL && _failure_reason!=NULL && strcmp(r, _failure_reason)==0); }
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369
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370 void record_failure(const char* reason);
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371 void record_method_not_compilable(const char* reason, bool all_tiers = false) {
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372 // All bailouts cover "all_tiers" when TieredCompilation is off.
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373 if (!TieredCompilation) all_tiers = true;
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374 env()->record_method_not_compilable(reason, all_tiers);
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375 // Record failure reason.
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376 record_failure(reason);
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377 }
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378 void record_method_not_compilable_all_tiers(const char* reason) {
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379 record_method_not_compilable(reason, true);
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380 }
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381 bool check_node_count(uint margin, const char* reason) {
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382 if (unique() + margin > (uint)MaxNodeLimit) {
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383 record_method_not_compilable(reason);
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384 return true;
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385 } else {
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386 return false;
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387 }
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388 }
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389
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390 // Node management
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391 uint unique() const { return _unique; }
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392 uint next_unique() { return _unique++; }
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393 void set_unique(uint i) { _unique = i; }
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394 static int debug_idx() { return debug_only(_debug_idx)+0; }
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395 static void set_debug_idx(int i) { debug_only(_debug_idx = i); }
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396 Arena* node_arena() { return &_node_arena; }
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397 Arena* old_arena() { return &_old_arena; }
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398 RootNode* root() const { return _root; }
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399 void set_root(RootNode* r) { _root = r; }
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400 StartNode* start() const; // (Derived from root.)
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401 void init_start(StartNode* s);
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402 Node* immutable_memory();
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403
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404 Node* recent_alloc_ctl() const { return _recent_alloc_ctl; }
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405 Node* recent_alloc_obj() const { return _recent_alloc_obj; }
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406 void set_recent_alloc(Node* ctl, Node* obj) {
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407 _recent_alloc_ctl = ctl;
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408 _recent_alloc_obj = obj;
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409 }
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410
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411 // Handy undefined Node
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412 Node* top() const { return _top; }
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413
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414 // these are used by guys who need to know about creation and transformation of top:
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415 Node* cached_top_node() { return _top; }
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416 void set_cached_top_node(Node* tn);
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417
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418 GrowableArray<Node_Notes*>* node_note_array() const { return _node_note_array; }
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419 void set_node_note_array(GrowableArray<Node_Notes*>* arr) { _node_note_array = arr; }
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420 Node_Notes* default_node_notes() const { return _default_node_notes; }
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421 void set_default_node_notes(Node_Notes* n) { _default_node_notes = n; }
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422
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423 Node_Notes* node_notes_at(int idx) {
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424 return locate_node_notes(_node_note_array, idx, false);
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425 }
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426 inline bool set_node_notes_at(int idx, Node_Notes* value);
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427
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428 // Copy notes from source to dest, if they exist.
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429 // Overwrite dest only if source provides something.
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430 // Return true if information was moved.
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431 bool copy_node_notes_to(Node* dest, Node* source);
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432
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433 // Workhorse function to sort out the blocked Node_Notes array:
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434 inline Node_Notes* locate_node_notes(GrowableArray<Node_Notes*>* arr,
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435 int idx, bool can_grow = false);
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436
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437 void grow_node_notes(GrowableArray<Node_Notes*>* arr, int grow_by);
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438
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439 // Type management
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440 Arena* type_arena() { return _type_arena; }
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441 Dict* type_dict() { return _type_dict; }
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442 void* type_hwm() { return _type_hwm; }
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443 size_t type_last_size() { return _type_last_size; }
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444 int num_alias_types() { return _num_alias_types; }
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445
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446 void init_type_arena() { _type_arena = &_Compile_types; }
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447 void set_type_arena(Arena* a) { _type_arena = a; }
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448 void set_type_dict(Dict* d) { _type_dict = d; }
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449 void set_type_hwm(void* p) { _type_hwm = p; }
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450 void set_type_last_size(size_t sz) { _type_last_size = sz; }
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451
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452 const TypeFunc* last_tf(ciMethod* m) {
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453 return (m == _last_tf_m) ? _last_tf : NULL;
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454 }
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455 void set_last_tf(ciMethod* m, const TypeFunc* tf) {
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456 assert(m != NULL || tf == NULL, "");
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457 _last_tf_m = m;
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458 _last_tf = tf;
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459 }
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460
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461 AliasType* alias_type(int idx) { assert(idx < num_alias_types(), "oob"); return _alias_types[idx]; }
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462 AliasType* alias_type(const TypePtr* adr_type) { return find_alias_type(adr_type, false); }
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463 bool have_alias_type(const TypePtr* adr_type);
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464 AliasType* alias_type(ciField* field);
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465
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466 int get_alias_index(const TypePtr* at) { return alias_type(at)->index(); }
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467 const TypePtr* get_adr_type(uint aidx) { return alias_type(aidx)->adr_type(); }
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468 int get_general_index(uint aidx) { return alias_type(aidx)->general_index(); }
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469
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470 // Building nodes
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471 void rethrow_exceptions(JVMState* jvms);
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472 void return_values(JVMState* jvms);
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473 JVMState* build_start_state(StartNode* start, const TypeFunc* tf);
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474
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475 // Decide how to build a call.
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476 // The profile factor is a discount to apply to this site's interp. profile.
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477 CallGenerator* call_generator(ciMethod* call_method, int vtable_index, bool call_is_virtual, JVMState* jvms, bool allow_inline, float profile_factor);
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478
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479 // Report if there were too many traps at a current method and bci.
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480 // Report if a trap was recorded, and/or PerMethodTrapLimit was exceeded.
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481 // If there is no MDO at all, report no trap unless told to assume it.
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482 bool too_many_traps(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
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483 // This version, unspecific to a particular bci, asks if
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484 // PerMethodTrapLimit was exceeded for all inlined methods seen so far.
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485 bool too_many_traps(Deoptimization::DeoptReason reason,
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486 // Privately used parameter for logging:
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487 ciMethodData* logmd = NULL);
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488 // Report if there were too many recompiles at a method and bci.
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489 bool too_many_recompiles(ciMethod* method, int bci, Deoptimization::DeoptReason reason);
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490
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491 // Parsing, optimization
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492 PhaseGVN* initial_gvn() { return _initial_gvn; }
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493 Unique_Node_List* for_igvn() { return _for_igvn; }
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494 inline void record_for_igvn(Node* n); // Body is after class Unique_Node_List.
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495 void set_initial_gvn(PhaseGVN *gvn) { _initial_gvn = gvn; }
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496 void set_for_igvn(Unique_Node_List *for_igvn) { _for_igvn = for_igvn; }
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497
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498 void identify_useful_nodes(Unique_Node_List &useful);
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499 void remove_useless_nodes (Unique_Node_List &useful);
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500
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501 WarmCallInfo* warm_calls() const { return _warm_calls; }
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502 void set_warm_calls(WarmCallInfo* l) { _warm_calls = l; }
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503 WarmCallInfo* pop_warm_call();
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504
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505 // Matching, CFG layout, allocation, code generation
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506 PhaseCFG* cfg() { return _cfg; }
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507 bool select_24_bit_instr() const { return _select_24_bit_instr; }
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508 bool in_24_bit_fp_mode() const { return _in_24_bit_fp_mode; }
859
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509 bool has_java_calls() const { return _java_calls > 0; }
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510 int java_calls() const { return _java_calls; }
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511 int inner_loops() const { return _inner_loops; }
0
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512 Matcher* matcher() { return _matcher; }
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513 PhaseRegAlloc* regalloc() { return _regalloc; }
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514 int frame_slots() const { return _frame_slots; }
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515 int frame_size_in_words() const; // frame_slots in units of the polymorphic 'words'
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516 RegMask& FIRST_STACK_mask() { return _FIRST_STACK_mask; }
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517 Arena* indexSet_arena() { return _indexSet_arena; }
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518 void* indexSet_free_block_list() { return _indexSet_free_block_list; }
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519 uint node_bundling_limit() { return _node_bundling_limit; }
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520 Bundle* node_bundling_base() { return _node_bundling_base; }
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521 void set_node_bundling_limit(uint n) { _node_bundling_limit = n; }
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522 void set_node_bundling_base(Bundle* b) { _node_bundling_base = b; }
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523 bool starts_bundle(const Node *n) const;
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524 bool need_stack_bang(int frame_size_in_bytes) const;
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525 bool need_register_stack_bang() const;
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526
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527 void set_matcher(Matcher* m) { _matcher = m; }
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528 //void set_regalloc(PhaseRegAlloc* ra) { _regalloc = ra; }
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529 void set_indexSet_arena(Arena* a) { _indexSet_arena = a; }
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530 void set_indexSet_free_block_list(void* p) { _indexSet_free_block_list = p; }
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531
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532 // Remember if this compilation changes hardware mode to 24-bit precision
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533 void set_24_bit_selection_and_mode(bool selection, bool mode) {
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534 _select_24_bit_instr = selection;
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535 _in_24_bit_fp_mode = mode;
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536 }
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537
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538 void set_java_calls(int z) { _java_calls = z; }
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539 void set_inner_loops(int z) { _inner_loops = z; }
0
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540
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541 // Instruction bits passed off to the VM
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542 int code_size() { return _method_size; }
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543 CodeBuffer* code_buffer() { return &_code_buffer; }
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544 int first_block_size() { return _first_block_size; }
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545 void set_frame_complete(int off) { _code_offsets.set_value(CodeOffsets::Frame_Complete, off); }
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546 ExceptionHandlerTable* handler_table() { return &_handler_table; }
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547 ImplicitExceptionTable* inc_table() { return &_inc_table; }
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548 OopMapSet* oop_map_set() { return _oop_map_set; }
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549 DebugInformationRecorder* debug_info() { return env()->debug_info(); }
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550 Dependencies* dependencies() { return env()->dependencies(); }
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551 static int CompiledZap_count() { return _CompiledZap_count; }
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552 BufferBlob* scratch_buffer_blob() { return _scratch_buffer_blob; }
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553 void init_scratch_buffer_blob();
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554 void set_scratch_buffer_blob(BufferBlob* b) { _scratch_buffer_blob = b; }
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555 relocInfo* scratch_locs_memory() { return _scratch_locs_memory; }
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556 void set_scratch_locs_memory(relocInfo* b) { _scratch_locs_memory = b; }
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557
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558 // emit to scratch blob, report resulting size
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559 uint scratch_emit_size(const Node* n);
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560
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561 enum ScratchBufferBlob {
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562 MAX_inst_size = 1024,
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563 MAX_locs_size = 128, // number of relocInfo elements
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564 MAX_const_size = 128,
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565 MAX_stubs_size = 128
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566 };
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567
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568 // Major entry point. Given a Scope, compile the associated method.
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569 // For normal compilations, entry_bci is InvocationEntryBci. For on stack
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570 // replacement, entry_bci indicates the bytecode for which to compile a
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571 // continuation.
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572 Compile(ciEnv* ci_env, C2Compiler* compiler, ciMethod* target,
38
b789bcaf2dd9 6667610: (Escape Analysis) retry compilation without EA if it fails
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573 int entry_bci, bool subsume_loads, bool do_escape_analysis);
0
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574
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575 // Second major entry point. From the TypeFunc signature, generate code
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576 // to pass arguments from the Java calling convention to the C calling
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577 // convention.
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578 Compile(ciEnv* ci_env, const TypeFunc *(*gen)(),
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579 address stub_function, const char *stub_name,
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580 int is_fancy_jump, bool pass_tls,
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581 bool save_arg_registers, bool return_pc);
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582
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583 // From the TypeFunc signature, generate code to pass arguments
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584 // from Compiled calling convention to Interpreter's calling convention
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585 void Generate_Compiled_To_Interpreter_Graph(const TypeFunc *tf, address interpreter_entry);
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586
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587 // From the TypeFunc signature, generate code to pass arguments
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588 // from Interpreter's calling convention to Compiler's calling convention
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589 void Generate_Interpreter_To_Compiled_Graph(const TypeFunc *tf);
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590
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591 // Are we compiling a method?
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592 bool has_method() { return method() != NULL; }
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593
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594 // Maybe print some information about this compile.
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595 void print_compile_messages();
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596
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597 // Final graph reshaping, a post-pass after the regular optimizer is done.
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598 bool final_graph_reshaping();
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599
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600 // returns true if adr is completely contained in the given alias category
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601 bool must_alias(const TypePtr* adr, int alias_idx);
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602
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603 // returns true if adr overlaps with the given alias category
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604 bool can_alias(const TypePtr* adr, int alias_idx);
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605
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606 // Driver for converting compiler's IR into machine code bits
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607 void Output();
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608
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609 // Accessors for node bundling info.
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610 Bundle* node_bundling(const Node *n);
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611 bool valid_bundle_info(const Node *n);
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612
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613 // Schedule and Bundle the instructions
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614 void ScheduleAndBundle();
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615
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616 // Build OopMaps for each GC point
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617 void BuildOopMaps();
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618
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619 // Append debug info for the node "local" at safepoint node "sfpt" to the
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620 // "array", May also consult and add to "objs", which describes the
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621 // scalar-replaced objects.
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622 void FillLocArray( int idx, MachSafePointNode* sfpt,
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623 Node *local, GrowableArray<ScopeValue*> *array,
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624 GrowableArray<ScopeValue*> *objs );
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625
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626 // If "objs" contains an ObjectValue whose id is "id", returns it, else NULL.
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627 static ObjectValue* sv_for_node_id(GrowableArray<ScopeValue*> *objs, int id);
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628 // Requres that "objs" does not contains an ObjectValue whose id matches
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629 // that of "sv. Appends "sv".
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630 static void set_sv_for_object_node(GrowableArray<ScopeValue*> *objs,
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631 ObjectValue* sv );
0
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632
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633 // Process an OopMap Element while emitting nodes
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634 void Process_OopMap_Node(MachNode *mach, int code_offset);
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635
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636 // Write out basic block data to code buffer
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637 void Fill_buffer();
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638
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639 // Determine which variable sized branches can be shortened
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640 void Shorten_branches(Label *labels, int& code_size, int& reloc_size, int& stub_size, int& const_size);
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641
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642 // Compute the size of first NumberOfLoopInstrToAlign instructions
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643 // at the head of a loop.
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644 void compute_loop_first_inst_sizes();
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645
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646 // Compute the information for the exception tables
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647 void FillExceptionTables(uint cnt, uint *call_returns, uint *inct_starts, Label *blk_labels);
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648
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649 // Stack slots that may be unused by the calling convention but must
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650 // otherwise be preserved. On Intel this includes the return address.
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651 // On PowerPC it includes the 4 words holding the old TOC & LR glue.
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652 uint in_preserve_stack_slots();
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653
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654 // "Top of Stack" slots that may be unused by the calling convention but must
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655 // otherwise be preserved.
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656 // On Intel these are not necessary and the value can be zero.
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657 // On Sparc this describes the words reserved for storing a register window
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658 // when an interrupt occurs.
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659 static uint out_preserve_stack_slots();
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660
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661 // Number of outgoing stack slots killed above the out_preserve_stack_slots
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662 // for calls to C. Supports the var-args backing area for register parms.
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663 uint varargs_C_out_slots_killed() const;
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664
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665 // Number of Stack Slots consumed by a synchronization entry
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666 int sync_stack_slots() const;
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667
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668 // Compute the name of old_SP. See <arch>.ad for frame layout.
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669 OptoReg::Name compute_old_SP();
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670
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671 #ifdef ENABLE_ZAP_DEAD_LOCALS
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672 static bool is_node_getting_a_safepoint(Node*);
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673 void Insert_zap_nodes();
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674 Node* call_zap_node(MachSafePointNode* n, int block_no);
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675 #endif
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676
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677 private:
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678 // Phase control:
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679 void Init(int aliaslevel); // Prepare for a single compilation
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680 int Inline_Warm(); // Find more inlining work.
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681 void Finish_Warm(); // Give up on further inlines.
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682 void Optimize(); // Given a graph, optimize it
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683 void Code_Gen(); // Generate code from a graph
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684
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685 // Management of the AliasType table.
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686 void grow_alias_types();
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687 AliasCacheEntry* probe_alias_cache(const TypePtr* adr_type);
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688 const TypePtr *flatten_alias_type(const TypePtr* adr_type) const;
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689 AliasType* find_alias_type(const TypePtr* adr_type, bool no_create);
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690
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691 void verify_top(Node*) const PRODUCT_RETURN;
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692
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693 // Intrinsic setup.
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694 void register_library_intrinsics(); // initializer
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695 CallGenerator* make_vm_intrinsic(ciMethod* m, bool is_virtual); // constructor
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696 int intrinsic_insertion_index(ciMethod* m, bool is_virtual); // helper
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697 CallGenerator* find_intrinsic(ciMethod* m, bool is_virtual); // query fn
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698 void register_intrinsic(CallGenerator* cg); // update fn
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699
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700 #ifndef PRODUCT
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701 static juint _intrinsic_hist_count[vmIntrinsics::ID_LIMIT];
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702 static jubyte _intrinsic_hist_flags[vmIntrinsics::ID_LIMIT];
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703 #endif
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704
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705 public:
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706
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707 // Note: Histogram array size is about 1 Kb.
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708 enum { // flag bits:
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709 _intrinsic_worked = 1, // succeeded at least once
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710 _intrinsic_failed = 2, // tried it but it failed
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711 _intrinsic_disabled = 4, // was requested but disabled (e.g., -XX:-InlineUnsafeOps)
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712 _intrinsic_virtual = 8, // was seen in the virtual form (rare)
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713 _intrinsic_both = 16 // was seen in the non-virtual form (usual)
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714 };
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715 // Update histogram. Return boolean if this is a first-time occurrence.
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716 static bool gather_intrinsic_statistics(vmIntrinsics::ID id,
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717 bool is_virtual, int flags) PRODUCT_RETURN0;
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718 static void print_intrinsic_statistics() PRODUCT_RETURN;
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719
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720 // Graph verification code
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721 // Walk the node list, verifying that there is a one-to-one
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722 // correspondence between Use-Def edges and Def-Use edges
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723 // The option no_dead_code enables stronger checks that the
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724 // graph is strongly connected from root in both directions.
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725 void verify_graph_edges(bool no_dead_code = false) PRODUCT_RETURN;
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726
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727 // Print bytecodes, including the scope inlining tree
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728 void print_codes();
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729
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730 // End-of-run dumps.
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731 static void print_statistics() PRODUCT_RETURN;
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732
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733 // Dump formatted assembly
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734 void dump_asm(int *pcs = NULL, uint pc_limit = 0) PRODUCT_RETURN;
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735 void dump_pc(int *pcs, int pc_limit, Node *n);
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736
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737 // Verify ADLC assumptions during startup
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738 static void adlc_verification() PRODUCT_RETURN;
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739
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740 // Definitions of pd methods
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741 static void pd_compiler2_init();
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742 };