LTOModule.h revision 3eb445feb22647e867a339f4c59b0a716b03a21a
1//===-LTOModule.h - LLVM Link Time Optimizer ------------------------------===// 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 declares the LTOModule class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LTO_MODULE_H 15#define LTO_MODULE_H 16 17#include "llvm/Module.h" 18#include "llvm/ADT/OwningPtr.h" 19#include "llvm/Target/TargetMachine.h" 20#include "llvm/ADT/StringMap.h" 21 22#include "llvm-c/lto.h" 23 24#include <vector> 25#include <string> 26 27 28// forward references to llvm classes 29namespace llvm { 30 class Mangler; 31 class MemoryBuffer; 32 class GlobalValue; 33 class Value; 34 class Function; 35} 36 37 38// 39// C++ class which implements the opaque lto_module_t 40// 41class LTOModule { 42public: 43 44 static bool isBitcodeFile(const void* mem, size_t length); 45 static bool isBitcodeFile(const char* path); 46 47 static bool isBitcodeFileForTarget(const void* mem, 48 size_t length, const char* triplePrefix); 49 50 static bool isBitcodeFileForTarget(const char* path, 51 const char* triplePrefix); 52 53 static LTOModule* makeLTOModule(const char* path, std::string& errMsg); 54 static LTOModule* makeLTOModule(const void* mem, size_t length, 55 std::string& errMsg); 56 57 const char* getTargetTriple(); 58 uint32_t getSymbolCount(); 59 lto_symbol_attributes getSymbolAttributes(uint32_t index); 60 const char* getSymbolName(uint32_t index); 61 62 llvm::Module * getLLVVMModule() { return _module.get(); } 63 64private: 65 LTOModule(llvm::Module* m, llvm::TargetMachine* t); 66 67 void lazyParseSymbols(); 68 void addDefinedSymbol(llvm::GlobalValue* def, 69 llvm::Mangler& mangler, 70 bool isFunction); 71 void addPotentialUndefinedSymbol(llvm::GlobalValue* decl, 72 llvm::Mangler &mangler); 73 void findExternalRefs(llvm::Value* value, 74 llvm::Mangler& mangler); 75 void addDefinedFunctionSymbol(llvm::Function* f, 76 llvm::Mangler &mangler); 77 void addDefinedDataSymbol(llvm::GlobalValue* v, 78 llvm::Mangler &mangler); 79 void addAsmGlobalSymbol(const char *); 80 void addObjCClass(llvm::GlobalVariable* clgv); 81 void addObjCCategory(llvm::GlobalVariable* clgv); 82 void addObjCClassRef(llvm::GlobalVariable* clgv); 83 bool objcClassNameFromExpression(llvm::Constant* c, 84 std::string& name); 85 86 static bool isTargetMatch(llvm::MemoryBuffer* memBuffer, 87 const char* triplePrefix); 88 89 static LTOModule* makeLTOModule(llvm::MemoryBuffer* buffer, 90 std::string& errMsg); 91 static llvm::MemoryBuffer* makeBuffer(const void* mem, size_t length); 92 93 typedef llvm::StringMap<uint8_t> StringSet; 94 95 struct NameAndAttributes { 96 const char* name; 97 lto_symbol_attributes attributes; 98 }; 99 100 llvm::OwningPtr<llvm::Module> _module; 101 llvm::OwningPtr<llvm::TargetMachine> _target; 102 bool _symbolsParsed; 103 std::vector<NameAndAttributes> _symbols; 104 // _defines and _undefines only needed to disambiguate tentative definitions 105 StringSet _defines; 106 llvm::StringMap<NameAndAttributes> _undefines; 107}; 108 109extern std::string getFeatureString(const char *TargetTriple); 110 111#endif // LTO_MODULE_H 112 113