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"
24 #include "llvm-c/lto.h"
30 // Forward references to llvm classes.
39 // C++ class which implements the opaque lto_module_t type.
43 typedef llvm::StringMap<uint8_t> StringSet;
45 struct NameAndAttributes {
49 llvm::GlobalValue *symbol;
52 llvm::OwningPtr<llvm::Module> _module;
53 llvm::OwningPtr<llvm::TargetMachine> _target;
54 std::vector<NameAndAttributes> _symbols;
56 // _defines and _undefines only needed to disambiguate tentative definitions
58 llvm::StringMap<NameAndAttributes> _undefines;
59 std::vector<const char*> _asm_undefines;
60 llvm::MCContext _context;
62 // Use mangler to add GlobalPrefix to names to match linker names.
63 llvm::Mangler _mangler;
65 LTOModule(llvm::Module *m, llvm::TargetMachine *t);
67 /// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
69 static bool isBitcodeFile(const void *mem, size_t length);
70 static bool isBitcodeFile(const char *path);
72 /// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
73 /// is LLVM bitcode for the specified triple.
74 static bool isBitcodeFileForTarget(const void *mem,
76 const char *triplePrefix);
77 static bool isBitcodeFileForTarget(const char *path,
78 const char *triplePrefix);
80 /// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
82 static LTOModule *makeLTOModule(const char* path,
84 static LTOModule *makeLTOModule(int fd, const char *path,
85 size_t size, std::string &errMsg);
86 static LTOModule *makeLTOModule(int fd, const char *path,
91 static LTOModule *makeLTOModule(const void *mem, size_t length,
94 /// getTargetTriple - Return the Module's target triple.
95 const char *getTargetTriple() {
96 return _module->getTargetTriple().c_str();
99 /// setTargetTriple - Set the Module's target triple.
100 void setTargetTriple(const char *triple) {
101 _module->setTargetTriple(triple);
104 /// getSymbolCount - Get the number of symbols
105 uint32_t getSymbolCount() {
106 return _symbols.size();
109 /// getSymbolAttributes - Get the attributes for a symbol at the specified
111 lto_symbol_attributes getSymbolAttributes(uint32_t index) {
112 if (index < _symbols.size())
113 return lto_symbol_attributes(_symbols[index].attributes);
114 return lto_symbol_attributes(0);
117 /// getSymbolName - Get the name of the symbol at the specified index.
118 const char *getSymbolName(uint32_t index) {
119 if (index < _symbols.size())
120 return _symbols[index].name;
124 /// getLLVVMModule - Return the Module.
125 llvm::Module *getLLVVMModule() { return _module.get(); }
127 /// getAsmUndefinedRefs -
128 const std::vector<const char*> &getAsmUndefinedRefs() {
129 return _asm_undefines;
133 /// parseSymbols - Parse the symbols from the module and model-level ASM and
134 /// add them to either the defined or undefined lists.
135 bool parseSymbols(std::string &errMsg);
137 /// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
138 /// to a list to be resolved later.
139 void addPotentialUndefinedSymbol(llvm::GlobalValue *dcl, bool isFunc);
141 /// addDefinedSymbol - Add a defined symbol to the list.
142 void addDefinedSymbol(llvm::GlobalValue *def, bool isFunction);
144 /// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
145 void addDefinedFunctionSymbol(llvm::Function *f);
147 /// addDefinedDataSymbol - Add a data symbol as defined to the list.
148 void addDefinedDataSymbol(llvm::GlobalValue *v);
150 /// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
151 /// defined or undefined lists.
152 bool addAsmGlobalSymbols(std::string &errMsg);
154 /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
156 void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
158 /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
159 /// the undefined list.
160 void addAsmGlobalSymbolUndef(const char *);
162 /// addObjCClass - Parse i386/ppc ObjC class data structure.
163 void addObjCClass(llvm::GlobalVariable *clgv);
165 /// addObjCCategory - Parse i386/ppc ObjC category data structure.
166 void addObjCCategory(llvm::GlobalVariable *clgv);
168 /// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
169 void addObjCClassRef(llvm::GlobalVariable *clgv);
171 /// objcClassNameFromExpression - Get string that the data pointer points
173 bool objcClassNameFromExpression(llvm::Constant* c, std::string &name);
175 /// isTargetMatch - Returns 'true' if the memory buffer is for the specified
177 static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
178 const char *triplePrefix);
180 /// makeLTOModule - Create an LTOModule (private version). N.B. This
181 /// method takes ownership of the buffer.
182 static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
183 std::string &errMsg);
185 /// makeBuffer - Create a MemoryBuffer from a memory range.
186 static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length);
189 #endif // LTO_MODULE_H