1 //===-LTOModule.h - LLVM Link Time Optimizer ------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the LTOModule class.
12 //===----------------------------------------------------------------------===//
17 #include "llvm/Module.h"
18 #include "llvm/MC/MCContext.h"
19 #include "llvm/Target/Mangler.h"
20 #include "llvm/Target/TargetMachine.h"
21 #include "llvm/ADT/OwningPtr.h"
22 #include "llvm/ADT/StringMap.h"
23 #include "llvm-c/lto.h"
27 // Forward references to llvm classes.
35 //===----------------------------------------------------------------------===//
36 /// LTOModule - C++ class which implements the opaque lto_module_t type.
40 typedef llvm::StringMap<uint8_t> StringSet;
42 struct NameAndAttributes {
46 llvm::GlobalValue *symbol;
49 llvm::OwningPtr<llvm::Module> _module;
50 llvm::OwningPtr<llvm::TargetMachine> _target;
51 std::vector<NameAndAttributes> _symbols;
53 // _defines and _undefines only needed to disambiguate tentative definitions
55 llvm::StringMap<NameAndAttributes> _undefines;
56 std::vector<const char*> _asm_undefines;
57 llvm::MCContext _context;
59 // Use mangler to add GlobalPrefix to names to match linker names.
60 llvm::Mangler _mangler;
62 LTOModule(llvm::Module *m, llvm::TargetMachine *t);
64 /// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
66 static bool isBitcodeFile(const void *mem, size_t length);
67 static bool isBitcodeFile(const char *path);
69 /// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
70 /// is LLVM bitcode for the specified triple.
71 static bool isBitcodeFileForTarget(const void *mem,
73 const char *triplePrefix);
74 static bool isBitcodeFileForTarget(const char *path,
75 const char *triplePrefix);
77 /// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
79 static LTOModule *makeLTOModule(const char* path,
81 static LTOModule *makeLTOModule(int fd, const char *path,
82 size_t size, std::string &errMsg);
83 static LTOModule *makeLTOModule(int fd, const char *path,
88 static LTOModule *makeLTOModule(const void *mem, size_t length,
91 /// getTargetTriple - Return the Module's target triple.
92 const char *getTargetTriple() {
93 return _module->getTargetTriple().c_str();
96 /// setTargetTriple - Set the Module's target triple.
97 void setTargetTriple(const char *triple) {
98 _module->setTargetTriple(triple);
101 /// getSymbolCount - Get the number of symbols
102 uint32_t getSymbolCount() {
103 return _symbols.size();
106 /// getSymbolAttributes - Get the attributes for a symbol at the specified
108 lto_symbol_attributes getSymbolAttributes(uint32_t index) {
109 if (index < _symbols.size())
110 return lto_symbol_attributes(_symbols[index].attributes);
111 return lto_symbol_attributes(0);
114 /// getSymbolName - Get the name of the symbol at the specified index.
115 const char *getSymbolName(uint32_t index) {
116 if (index < _symbols.size())
117 return _symbols[index].name;
121 /// getLLVVMModule - Return the Module.
122 llvm::Module *getLLVVMModule() { return _module.get(); }
124 /// getAsmUndefinedRefs -
125 const std::vector<const char*> &getAsmUndefinedRefs() {
126 return _asm_undefines;
130 /// parseSymbols - Parse the symbols from the module and model-level ASM and
131 /// add them to either the defined or undefined lists.
132 bool parseSymbols(std::string &errMsg);
134 /// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
135 /// to a list to be resolved later.
136 void addPotentialUndefinedSymbol(llvm::GlobalValue *dcl, bool isFunc);
138 /// addDefinedSymbol - Add a defined symbol to the list.
139 void addDefinedSymbol(llvm::GlobalValue *def, bool isFunction);
141 /// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
142 void addDefinedFunctionSymbol(llvm::Function *f);
144 /// addDefinedDataSymbol - Add a data symbol as defined to the list.
145 void addDefinedDataSymbol(llvm::GlobalValue *v);
147 /// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
148 /// defined or undefined lists.
149 bool addAsmGlobalSymbols(std::string &errMsg);
151 /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
153 void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
155 /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
156 /// the undefined list.
157 void addAsmGlobalSymbolUndef(const char *);
159 /// addObjCClass - Parse i386/ppc ObjC class data structure.
160 void addObjCClass(llvm::GlobalVariable *clgv);
162 /// addObjCCategory - Parse i386/ppc ObjC category data structure.
163 void addObjCCategory(llvm::GlobalVariable *clgv);
165 /// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
166 void addObjCClassRef(llvm::GlobalVariable *clgv);
168 /// objcClassNameFromExpression - Get string that the data pointer points
170 bool objcClassNameFromExpression(llvm::Constant* c, std::string &name);
172 /// isTargetMatch - Returns 'true' if the memory buffer is for the specified
174 static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
175 const char *triplePrefix);
177 /// makeLTOModule - Create an LTOModule (private version). N.B. This
178 /// method takes ownership of the buffer.
179 static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
180 std::string &errMsg);
182 /// makeBuffer - Create a MemoryBuffer from a memory range.
183 static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length);
186 #endif // LTO_MODULE_H