1 //===-- llvm/CodeGen/MachinePassRegistry.h ----------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains the mechanics for machine function pass registries. A 11 // function pass registry (MachinePassRegistry) is auto filled by the static 12 // constructors of MachinePassRegistryNode. Further there is a command line 13 // parser (RegisterPassParser) which listens to each registry for additions 14 // and deletions, so that the appropriate command option is updated. 15 // 16 //===----------------------------------------------------------------------===// 17 18 #ifndef LLVM_CODEGEN_MACHINEPASSREGISTRY_H 19 #define LLVM_CODEGEN_MACHINEPASSREGISTRY_H 20 21 #include "llvm/CodeGen/Passes.h" 22 #include "llvm/Support/CommandLine.h" 23 24 namespace llvm { 25 26 typedef void *(*MachinePassCtor)(); 27 28 29 //===----------------------------------------------------------------------===// 30 /// 31 /// MachinePassRegistryListener - Listener to adds and removals of nodes in 32 /// registration list. 33 /// 34 //===----------------------------------------------------------------------===// 35 class MachinePassRegistryListener { 36 virtual void anchor(); 37 public: 38 MachinePassRegistryListener() {} 39 virtual ~MachinePassRegistryListener() {} 40 virtual void NotifyAdd(const char *N, MachinePassCtor C, const char *D) = 0; 41 virtual void NotifyRemove(const char *N) = 0; 42 }; 43 44 45 //===----------------------------------------------------------------------===// 46 /// 47 /// MachinePassRegistryNode - Machine pass node stored in registration list. 48 /// 49 //===----------------------------------------------------------------------===// 50 class MachinePassRegistryNode { 51 52 private: 53 54 MachinePassRegistryNode *Next; // Next function pass in list. 55 const char *Name; // Name of function pass. 56 const char *Description; // Description string. 57 MachinePassCtor Ctor; // Function pass creator. 58 59 public: 60 61 MachinePassRegistryNode(const char *N, const char *D, MachinePassCtor C) 62 : Next(nullptr) 63 , Name(N) 64 , Description(D) 65 , Ctor(C) 66 {} 67 68 // Accessors 69 MachinePassRegistryNode *getNext() const { return Next; } 70 MachinePassRegistryNode **getNextAddress() { return &Next; } 71 const char *getName() const { return Name; } 72 const char *getDescription() const { return Description; } 73 MachinePassCtor getCtor() const { return Ctor; } 74 void setNext(MachinePassRegistryNode *N) { Next = N; } 75 76 }; 77 78 79 //===----------------------------------------------------------------------===// 80 /// 81 /// MachinePassRegistry - Track the registration of machine passes. 82 /// 83 //===----------------------------------------------------------------------===// 84 class MachinePassRegistry { 85 86 private: 87 88 MachinePassRegistryNode *List; // List of registry nodes. 89 MachinePassCtor Default; // Default function pass creator. 90 MachinePassRegistryListener* Listener;// Listener for list adds are removes. 91 92 public: 93 94 // NO CONSTRUCTOR - we don't want static constructor ordering to mess 95 // with the registry. 96 97 // Accessors. 98 // 99 MachinePassRegistryNode *getList() { return List; } 100 MachinePassCtor getDefault() { return Default; } 101 void setDefault(MachinePassCtor C) { Default = C; } 102 void setDefault(StringRef Name); 103 void setListener(MachinePassRegistryListener *L) { Listener = L; } 104 105 /// Add - Adds a function pass to the registration list. 106 /// 107 void Add(MachinePassRegistryNode *Node); 108 109 /// Remove - Removes a function pass from the registration list. 110 /// 111 void Remove(MachinePassRegistryNode *Node); 112 113 }; 114 115 116 //===----------------------------------------------------------------------===// 117 /// 118 /// RegisterPassParser class - Handle the addition of new machine passes. 119 /// 120 //===----------------------------------------------------------------------===// 121 template<class RegistryClass> 122 class RegisterPassParser : public MachinePassRegistryListener, 123 public cl::parser<typename RegistryClass::FunctionPassCtor> { 124 public: 125 RegisterPassParser(cl::Option &O) 126 : cl::parser<typename RegistryClass::FunctionPassCtor>(O) {} 127 ~RegisterPassParser() override { RegistryClass::setListener(nullptr); } 128 129 void initialize() { 130 cl::parser<typename RegistryClass::FunctionPassCtor>::initialize(); 131 132 // Add existing passes to option. 133 for (RegistryClass *Node = RegistryClass::getList(); 134 Node; Node = Node->getNext()) { 135 this->addLiteralOption(Node->getName(), 136 (typename RegistryClass::FunctionPassCtor)Node->getCtor(), 137 Node->getDescription()); 138 } 139 140 // Make sure we listen for list changes. 141 RegistryClass::setListener(this); 142 } 143 144 // Implement the MachinePassRegistryListener callbacks. 145 // 146 void NotifyAdd(const char *N, MachinePassCtor C, const char *D) override { 147 this->addLiteralOption(N, (typename RegistryClass::FunctionPassCtor)C, D); 148 } 149 void NotifyRemove(const char *N) override { 150 this->removeLiteralOption(N); 151 } 152 }; 153 154 155 } // end namespace llvm 156 157 #endif 158
