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annotate include/llvm/PassSupport.h @ 77:54457678186b LLVM3.6

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children 60c9769439b8
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1 //===- llvm/PassSupport.h - Pass Support code -------------------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file defines stuff that is used to define and "use" Passes. This file
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11 // is automatically #included by Pass.h, so:
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12 //
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13 // NO .CPP FILES SHOULD INCLUDE THIS FILE DIRECTLY
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14 //
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15 // Instead, #include Pass.h.
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16 //
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17 // This file defines Pass registration code and classes used for it.
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18 //
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19 //===----------------------------------------------------------------------===//
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20
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21 #ifndef LLVM_PASSSUPPORT_H
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22 #define LLVM_PASSSUPPORT_H
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23
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24 #include "Pass.h"
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25 #include "llvm/InitializePasses.h"
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26 #include "llvm/PassInfo.h"
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27 #include "llvm/PassRegistry.h"
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28 #include "llvm/Support/Atomic.h"
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29 #include "llvm/Support/Valgrind.h"
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30 #include <vector>
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31
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32 namespace llvm {
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33
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34 class TargetMachine;
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35
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36 #define CALL_ONCE_INITIALIZATION(function) \
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37 static volatile sys::cas_flag initialized = 0; \
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38 sys::cas_flag old_val = sys::CompareAndSwap(&initialized, 1, 0); \
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39 if (old_val == 0) { \
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40 function(Registry); \
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41 sys::MemoryFence(); \
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42 TsanIgnoreWritesBegin(); \
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43 TsanHappensBefore(&initialized); \
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44 initialized = 2; \
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45 TsanIgnoreWritesEnd(); \
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46 } else { \
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47 sys::cas_flag tmp = initialized; \
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48 sys::MemoryFence(); \
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49 while (tmp != 2) { \
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50 tmp = initialized; \
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51 sys::MemoryFence(); \
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52 } \
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53 } \
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54 TsanHappensAfter(&initialized);
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55
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56 #define INITIALIZE_PASS(passName, arg, name, cfg, analysis) \
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57 static void* initialize##passName##PassOnce(PassRegistry &Registry) { \
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58 PassInfo *PI = new PassInfo(name, arg, & passName ::ID, \
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59 PassInfo::NormalCtor_t(callDefaultCtor< passName >), cfg, analysis); \
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60 Registry.registerPass(*PI, true); \
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61 return PI; \
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62 } \
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63 void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
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64 CALL_ONCE_INITIALIZATION(initialize##passName##PassOnce) \
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65 }
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66
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67 #define INITIALIZE_PASS_BEGIN(passName, arg, name, cfg, analysis) \
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68 static void* initialize##passName##PassOnce(PassRegistry &Registry) {
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69
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70 #define INITIALIZE_PASS_DEPENDENCY(depName) \
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71 initialize##depName##Pass(Registry);
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72 #define INITIALIZE_AG_DEPENDENCY(depName) \
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73 initialize##depName##AnalysisGroup(Registry);
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74
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75 #define INITIALIZE_PASS_END(passName, arg, name, cfg, analysis) \
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76 PassInfo *PI = new PassInfo(name, arg, & passName ::ID, \
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77 PassInfo::NormalCtor_t(callDefaultCtor< passName >), cfg, analysis); \
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78 Registry.registerPass(*PI, true); \
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79 return PI; \
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80 } \
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81 void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
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82 CALL_ONCE_INITIALIZATION(initialize##passName##PassOnce) \
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83 }
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84
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85 template<typename PassName>
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86 Pass *callDefaultCtor() { return new PassName(); }
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87
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88 template <typename PassName> Pass *callTargetMachineCtor(TargetMachine *TM) {
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89 return new PassName(TM);
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90 }
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91
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92 //===---------------------------------------------------------------------------
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93 /// RegisterPass<t> template - This template class is used to notify the system
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94 /// that a Pass is available for use, and registers it into the internal
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95 /// database maintained by the PassManager. Unless this template is used, opt,
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96 /// for example will not be able to see the pass and attempts to create the pass
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97 /// will fail. This template is used in the follow manner (at global scope, in
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98 /// your .cpp file):
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99 ///
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100 /// static RegisterPass<YourPassClassName> tmp("passopt", "My Pass Name");
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101 ///
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102 /// This statement will cause your pass to be created by calling the default
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103 /// constructor exposed by the pass. If you have a different constructor that
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104 /// must be called, create a global constructor function (which takes the
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105 /// arguments you need and returns a Pass*) and register your pass like this:
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106 ///
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107 /// static RegisterPass<PassClassName> tmp("passopt", "My Name");
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108 ///
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109 template<typename passName>
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110 struct RegisterPass : public PassInfo {
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111
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112 // Register Pass using default constructor...
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113 RegisterPass(const char *PassArg, const char *Name, bool CFGOnly = false,
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114 bool is_analysis = false)
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115 : PassInfo(Name, PassArg, &passName::ID,
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116 PassInfo::NormalCtor_t(callDefaultCtor<passName>),
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117 CFGOnly, is_analysis) {
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118 PassRegistry::getPassRegistry()->registerPass(*this);
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119 }
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120 };
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121
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122
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123 /// RegisterAnalysisGroup - Register a Pass as a member of an analysis _group_.
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124 /// Analysis groups are used to define an interface (which need not derive from
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125 /// Pass) that is required by passes to do their job. Analysis Groups differ
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126 /// from normal analyses because any available implementation of the group will
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127 /// be used if it is available.
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128 ///
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129 /// If no analysis implementing the interface is available, a default
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130 /// implementation is created and added. A pass registers itself as the default
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131 /// implementation by specifying 'true' as the second template argument of this
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132 /// class.
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133 ///
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134 /// In addition to registering itself as an analysis group member, a pass must
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135 /// register itself normally as well. Passes may be members of multiple groups
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136 /// and may still be "required" specifically by name.
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137 ///
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138 /// The actual interface may also be registered as well (by not specifying the
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139 /// second template argument). The interface should be registered to associate
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140 /// a nice name with the interface.
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141 ///
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142 class RegisterAGBase : public PassInfo {
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143 public:
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144 RegisterAGBase(const char *Name,
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145 const void *InterfaceID,
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146 const void *PassID = nullptr,
0
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147 bool isDefault = false);
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148 };
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149
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150 template<typename Interface, bool Default = false>
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151 struct RegisterAnalysisGroup : public RegisterAGBase {
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152 explicit RegisterAnalysisGroup(PassInfo &RPB)
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153 : RegisterAGBase(RPB.getPassName(),
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154 &Interface::ID, RPB.getTypeInfo(),
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155 Default) {
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156 }
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157
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158 explicit RegisterAnalysisGroup(const char *Name)
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159 : RegisterAGBase(Name, &Interface::ID) {
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160 }
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161 };
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162
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163 #define INITIALIZE_ANALYSIS_GROUP(agName, name, defaultPass) \
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164 static void* initialize##agName##AnalysisGroupOnce(PassRegistry &Registry) { \
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165 initialize##defaultPass##Pass(Registry); \
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166 PassInfo *AI = new PassInfo(name, & agName :: ID); \
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167 Registry.registerAnalysisGroup(& agName ::ID, 0, *AI, false, true); \
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168 return AI; \
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169 } \
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170 void llvm::initialize##agName##AnalysisGroup(PassRegistry &Registry) { \
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171 CALL_ONCE_INITIALIZATION(initialize##agName##AnalysisGroupOnce) \
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172 }
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173
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174
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175 #define INITIALIZE_AG_PASS(passName, agName, arg, name, cfg, analysis, def) \
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176 static void* initialize##passName##PassOnce(PassRegistry &Registry) { \
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177 if (!def) initialize##agName##AnalysisGroup(Registry); \
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178 PassInfo *PI = new PassInfo(name, arg, & passName ::ID, \
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179 PassInfo::NormalCtor_t(callDefaultCtor< passName >), cfg, analysis); \
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180 Registry.registerPass(*PI, true); \
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181 \
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182 PassInfo *AI = new PassInfo(name, & agName :: ID); \
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183 Registry.registerAnalysisGroup(& agName ::ID, & passName ::ID, \
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184 *AI, def, true); \
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185 return AI; \
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186 } \
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187 void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
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188 CALL_ONCE_INITIALIZATION(initialize##passName##PassOnce) \
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189 }
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190
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191
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192 #define INITIALIZE_AG_PASS_BEGIN(passName, agName, arg, n, cfg, analysis, def) \
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193 static void* initialize##passName##PassOnce(PassRegistry &Registry) { \
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194 if (!def) initialize##agName##AnalysisGroup(Registry);
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195
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196 #define INITIALIZE_AG_PASS_END(passName, agName, arg, n, cfg, analysis, def) \
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197 PassInfo *PI = new PassInfo(n, arg, & passName ::ID, \
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198 PassInfo::NormalCtor_t(callDefaultCtor< passName >), cfg, analysis); \
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199 Registry.registerPass(*PI, true); \
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200 \
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201 PassInfo *AI = new PassInfo(n, & agName :: ID); \
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202 Registry.registerAnalysisGroup(& agName ::ID, & passName ::ID, \
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203 *AI, def, true); \
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204 return AI; \
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205 } \
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206 void llvm::initialize##passName##Pass(PassRegistry &Registry) { \
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207 CALL_ONCE_INITIALIZATION(initialize##passName##PassOnce) \
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208 }
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209
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210 //===---------------------------------------------------------------------------
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211 /// PassRegistrationListener class - This class is meant to be derived from by
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212 /// clients that are interested in which passes get registered and unregistered
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213 /// at runtime (which can be because of the RegisterPass constructors being run
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214 /// as the program starts up, or may be because a shared object just got
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215 /// loaded).
0
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216 ///
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217 struct PassRegistrationListener {
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218
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219 PassRegistrationListener() {}
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220 virtual ~PassRegistrationListener() {}
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221
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222 /// Callback functions - These functions are invoked whenever a pass is loaded
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223 /// or removed from the current executable.
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224 ///
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225 virtual void passRegistered(const PassInfo *) {}
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226
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227 /// enumeratePasses - Iterate over the registered passes, calling the
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228 /// passEnumerate callback on each PassInfo object.
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229 ///
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230 void enumeratePasses();
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231
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232 /// passEnumerate - Callback function invoked when someone calls
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233 /// enumeratePasses on this PassRegistrationListener object.
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234 ///
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235 virtual void passEnumerate(const PassInfo *) {}
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236 };
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237
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238
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239 } // End llvm namespace
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240
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241 #endif