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 {
46 enum name_type { IsFunction, IsData };
48 lto_symbol_attributes attributes;
51 llvm::OwningPtr<llvm::Module> _module;
52 llvm::OwningPtr<llvm::TargetMachine> _target;
53 std::vector<NameAndAttributes> _symbols;
55 // _defines and _undefines only needed to disambiguate tentative definitions
57 llvm::StringMap<NameAndAttributes> _undefines;
58 std::vector<const char*> _asm_undefines;
59 llvm::MCContext _context;
61 // Use mangler to add GlobalPrefix to names to match linker names.
62 llvm::Mangler _mangler;
64 LTOModule(llvm::Module *m, llvm::TargetMachine *t);
66 /// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
68 static bool isBitcodeFile(const void *mem, size_t length);
69 static bool isBitcodeFile(const char *path);
71 /// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
72 /// is LLVM bitcode for the specified triple.
73 static bool isBitcodeFileForTarget(const void *mem,
75 const char *triplePrefix);
76 static bool isBitcodeFileForTarget(const char *path,
77 const char *triplePrefix);
79 /// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
81 static LTOModule *makeLTOModule(const char* path,
83 static LTOModule *makeLTOModule(int fd, const char *path,
84 size_t size, std::string &errMsg);
85 static LTOModule *makeLTOModule(int fd, const char *path,
90 static LTOModule *makeLTOModule(const void *mem, size_t length,
93 /// getTargetTriple - Return the Module's target triple.
94 const char *getTargetTriple() {
95 return _module->getTargetTriple().c_str();
98 /// setTargetTriple - Set the Module's target triple.
99 void setTargetTriple(const char *triple) {
100 _module->setTargetTriple(triple);
103 /// getSymbolCount - Get the number of symbols
104 uint32_t getSymbolCount() {
105 return _symbols.size();
108 /// getSymbolAttributes - Get the attributes for a symbol at the specified
110 lto_symbol_attributes getSymbolAttributes(uint32_t index) {
111 if (index < _symbols.size())
112 return _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;
125 /// getLLVVMModule - Return the Module.
126 llvm::Module *getLLVVMModule() { return _module.get(); }
128 /// getAsmUndefinedRefs -
129 const std::vector<const char*> &getAsmUndefinedRefs() {
130 return _asm_undefines;
134 /// parseSymbols - Parse the symbols from the module and model-level ASM and
135 /// add them to either the defined or undefined lists.
136 bool parseSymbols(std::string &errMsg);
138 /// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
139 /// to a list to be resolved later.
140 void addPotentialUndefinedSymbol(llvm::GlobalValue *dcl);
142 /// addDefinedSymbol - Add a defined symbol to the list.
143 void addDefinedSymbol(llvm::GlobalValue *def, bool isFunction);
145 /// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
146 void addDefinedFunctionSymbol(llvm::Function *f);
148 /// addDefinedDataSymbol - Add a data symbol as defined to the list.
149 void addDefinedDataSymbol(llvm::GlobalValue *v);
151 /// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
152 /// defined or undefined lists.
153 bool addAsmGlobalSymbols(std::string &errMsg);
155 /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
157 void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
159 /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
160 /// the undefined list.
161 void addAsmGlobalSymbolUndef(const char *);
163 /// addObjCClass - Parse i386/ppc ObjC class data structure.
164 void addObjCClass(llvm::GlobalVariable *clgv);
166 /// addObjCCategory - Parse i386/ppc ObjC category data structure.
167 void addObjCCategory(llvm::GlobalVariable *clgv);
169 /// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
170 void addObjCClassRef(llvm::GlobalVariable *clgv);
172 /// objcClassNameFromExpression - Get string that the data pointer points
174 bool objcClassNameFromExpression(llvm::Constant* c, std::string &name);
176 /// isTargetMatch - Returns 'true' if the memory buffer is for the specified
178 static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
179 const char *triplePrefix);
181 /// makeLTOModule - Create an LTOModule (private version). N.B. This
182 /// method takes ownership of the buffer.
183 static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
184 std::string &errMsg);
186 /// makeBuffer - Create a MemoryBuffer from a memory range.
187 static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length);
190 #endif // LTO_MODULE_H