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-rw-r--r--include/llvm/LTO/LTOCodeGenerator.h130
-rw-r--r--include/llvm/LTO/LTOModule.h196
2 files changed, 326 insertions, 0 deletions
diff --git a/include/llvm/LTO/LTOCodeGenerator.h b/include/llvm/LTO/LTOCodeGenerator.h
new file mode 100644
index 0000000..3d151b9
--- /dev/null
+++ b/include/llvm/LTO/LTOCodeGenerator.h
@@ -0,0 +1,130 @@
+//===-LTOCodeGenerator.h - LLVM Link Time Optimizer -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the LTOCodeGenerator class.
+//
+// LTO compilation consists of three phases: Pre-IPO, IPO and Post-IPO.
+//
+// The Pre-IPO phase compiles source code into bitcode file. The resulting
+// bitcode files, along with object files and libraries, will be fed to the
+// linker to through the IPO and Post-IPO phases. By using obj-file extension,
+// the resulting bitcode file disguises itself as an object file, and therefore
+// obviates the need of writing a special set of the make-rules only for LTO
+// compilation.
+//
+// The IPO phase perform inter-procedural analyses and optimizations, and
+// the Post-IPO consists two sub-phases: intra-procedural scalar optimizations
+// (SOPT), and intra-procedural target-dependent code generator (CG).
+//
+// As of this writing, we don't separate IPO and the Post-IPO SOPT. They
+// are intermingled together, and are driven by a single pass manager (see
+// PassManagerBuilder::populateLTOPassManager()).
+//
+// The "LTOCodeGenerator" is the driver for the IPO and Post-IPO stages.
+// The "CodeGenerator" here is bit confusing. Don't confuse the "CodeGenerator"
+// with the machine specific code generator.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LTO_CODE_GENERATOR_H
+#define LTO_CODE_GENERATOR_H
+
+#include "llvm-c/lto.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Linker.h"
+#include <string>
+#include <vector>
+
+namespace llvm {
+ class LLVMContext;
+ class GlobalValue;
+ class Mangler;
+ class MemoryBuffer;
+ class TargetMachine;
+ class raw_ostream;
+}
+
+//===----------------------------------------------------------------------===//
+/// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t
+/// type.
+///
+struct LTOCodeGenerator {
+ static const char *getVersionString();
+
+ LTOCodeGenerator();
+ ~LTOCodeGenerator();
+
+ // Merge given module, return true on success.
+ bool addModule(struct LTOModule*, std::string &errMsg);
+
+ void setDebugInfo(lto_debug_model);
+ void setCodePICModel(lto_codegen_model);
+
+ void setCpu(const char *mCpu) { MCpu = mCpu; }
+
+ void addMustPreserveSymbol(const char *sym) { MustPreserveSymbols[sym] = 1; }
+
+ // To pass options to the driver and optimization passes. These options are
+ // not necessarily for debugging purpose (The function name is misleading).
+ // This function should be called before LTOCodeGenerator::compilexxx(),
+ // and LTOCodeGenerator::writeMergedModules().
+ //
+ void setCodeGenDebugOptions(const char *opts);
+
+ // Write the merged module to the file specified by the given path.
+ // Return true on success.
+ bool writeMergedModules(const char *path, std::string &errMsg);
+
+ // Compile the merged module into a *single* object file; the path to object
+ // file is returned to the caller via argument "name". Return true on
+ // success.
+ //
+ // NOTE that it is up to the linker to remove the intermediate object file.
+ // Do not try to remove the object file in LTOCodeGenerator's destructor
+ // as we don't who (LTOCodeGenerator or the obj file) will last longer.
+ //
+ bool compile_to_file(const char **name, std::string &errMsg);
+
+ // As with compile_to_file(), this function compiles the merged module into
+ // single object file. Instead of returning the object-file-path to the caller
+ // (linker), it brings the object to a buffer, and return the buffer to the
+ // caller. This function should delete intermediate object file once its content
+ // is brought to memory. Return NULL if the compilation was not successful.
+ //
+ const void *compile(size_t *length, std::string &errMsg);
+
+private:
+ void initializeLTOPasses();
+
+ bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg);
+ void applyScopeRestrictions();
+ void applyRestriction(llvm::GlobalValue &GV,
+ std::vector<const char*> &MustPreserveList,
+ llvm::SmallPtrSet<llvm::GlobalValue*, 8> &AsmUsed,
+ llvm::Mangler &Mangler);
+ bool determineTarget(std::string &errMsg);
+
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ llvm::LLVMContext &Context;
+ llvm::Linker Linker;
+ llvm::TargetMachine *TargetMach;
+ bool EmitDwarfDebugInfo;
+ bool ScopeRestrictionsDone;
+ lto_codegen_model CodeModel;
+ StringSet MustPreserveSymbols;
+ StringSet AsmUndefinedRefs;
+ llvm::MemoryBuffer *NativeObjectFile;
+ std::vector<char *> CodegenOptions;
+ std::string MCpu;
+ std::string NativeObjectPath;
+};
+
+#endif // LTO_CODE_GENERATOR_H
diff --git a/include/llvm/LTO/LTOModule.h b/include/llvm/LTO/LTOModule.h
new file mode 100644
index 0000000..973466c
--- /dev/null
+++ b/include/llvm/LTO/LTOModule.h
@@ -0,0 +1,196 @@
+//===-LTOModule.h - LLVM Link Time Optimizer ------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the LTOModule class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LTO_MODULE_H
+#define LTO_MODULE_H
+
+#include "llvm-c/lto.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetMachine.h"
+#include <string>
+#include <vector>
+
+// Forward references to llvm classes.
+namespace llvm {
+ class Function;
+ class GlobalValue;
+ class MemoryBuffer;
+ class TargetOptions;
+ class Value;
+}
+
+//===----------------------------------------------------------------------===//
+/// LTOModule - C++ class which implements the opaque lto_module_t type.
+///
+struct LTOModule {
+private:
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ struct NameAndAttributes {
+ const char *name;
+ uint32_t attributes;
+ bool isFunction;
+ const llvm::GlobalValue *symbol;
+ };
+
+ llvm::OwningPtr<llvm::Module> _module;
+ llvm::OwningPtr<llvm::TargetMachine> _target;
+ std::vector<NameAndAttributes> _symbols;
+
+ // _defines and _undefines only needed to disambiguate tentative definitions
+ StringSet _defines;
+ llvm::StringMap<NameAndAttributes> _undefines;
+ std::vector<const char*> _asm_undefines;
+ llvm::MCContext _context;
+
+ // Use mangler to add GlobalPrefix to names to match linker names.
+ llvm::Mangler _mangler;
+
+ LTOModule(llvm::Module *m, llvm::TargetMachine *t);
+public:
+ /// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
+ /// bitcode.
+ static bool isBitcodeFile(const void *mem, size_t length);
+ static bool isBitcodeFile(const char *path);
+
+ /// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
+ /// is LLVM bitcode for the specified triple.
+ static bool isBitcodeFileForTarget(const void *mem,
+ size_t length,
+ const char *triplePrefix);
+ static bool isBitcodeFileForTarget(const char *path,
+ const char *triplePrefix);
+
+ /// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
+ /// of the buffer. The caller must have initialized the Targets, the
+ /// TargetMCs, the AsmPrinters, and the AsmParsers by calling:
+ ///
+ /// InitializeAllTargets();
+ /// InitializeAllTargetMCs();
+ /// InitializeAllAsmPrinters();
+ /// InitializeAllAsmParsers();
+ static LTOModule *makeLTOModule(const char* path,
+ std::string &errMsg);
+ static LTOModule *makeLTOModule(int fd, const char *path,
+ size_t size, std::string &errMsg);
+ static LTOModule *makeLTOModule(int fd, const char *path,
+ size_t map_size,
+ off_t offset,
+ std::string& errMsg);
+ static LTOModule *makeLTOModule(const void *mem, size_t length,
+ std::string &errMsg);
+
+ /// getTargetTriple - Return the Module's target triple.
+ const char *getTargetTriple() {
+ return _module->getTargetTriple().c_str();
+ }
+
+ /// setTargetTriple - Set the Module's target triple.
+ void setTargetTriple(const char *triple) {
+ _module->setTargetTriple(triple);
+ }
+
+ /// getSymbolCount - Get the number of symbols
+ uint32_t getSymbolCount() {
+ return _symbols.size();
+ }
+
+ /// getSymbolAttributes - Get the attributes for a symbol at the specified
+ /// index.
+ lto_symbol_attributes getSymbolAttributes(uint32_t index) {
+ if (index < _symbols.size())
+ return lto_symbol_attributes(_symbols[index].attributes);
+ return lto_symbol_attributes(0);
+ }
+
+ /// getSymbolName - Get the name of the symbol at the specified index.
+ const char *getSymbolName(uint32_t index) {
+ if (index < _symbols.size())
+ return _symbols[index].name;
+ return NULL;
+ }
+
+ /// getLLVVMModule - Return the Module.
+ llvm::Module *getLLVVMModule() { return _module.get(); }
+
+ /// getAsmUndefinedRefs -
+ const std::vector<const char*> &getAsmUndefinedRefs() {
+ return _asm_undefines;
+ }
+
+ /// getTargetOptions - Fill the TargetOptions object with the options
+ /// specified on the command line.
+ static void getTargetOptions(llvm::TargetOptions &Options);
+
+private:
+ /// parseSymbols - Parse the symbols from the module and model-level ASM and
+ /// add them to either the defined or undefined lists.
+ bool parseSymbols(std::string &errMsg);
+
+ /// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
+ /// to a list to be resolved later.
+ void addPotentialUndefinedSymbol(const llvm::GlobalValue *dcl, bool isFunc);
+
+ /// addDefinedSymbol - Add a defined symbol to the list.
+ void addDefinedSymbol(const llvm::GlobalValue *def, bool isFunction);
+
+ /// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
+ void addDefinedFunctionSymbol(const llvm::Function *f);
+
+ /// addDefinedDataSymbol - Add a data symbol as defined to the list.
+ void addDefinedDataSymbol(const llvm::GlobalValue *v);
+
+ /// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
+ /// defined or undefined lists.
+ bool addAsmGlobalSymbols(std::string &errMsg);
+
+ /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
+ /// defined list.
+ void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
+
+ /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
+ /// the undefined list.
+ void addAsmGlobalSymbolUndef(const char *);
+
+ /// addObjCClass - Parse i386/ppc ObjC class data structure.
+ void addObjCClass(const llvm::GlobalVariable *clgv);
+
+ /// addObjCCategory - Parse i386/ppc ObjC category data structure.
+ void addObjCCategory(const llvm::GlobalVariable *clgv);
+
+ /// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
+ void addObjCClassRef(const llvm::GlobalVariable *clgv);
+
+ /// objcClassNameFromExpression - Get string that the data pointer points
+ /// to.
+ bool objcClassNameFromExpression(const llvm::Constant* c, std::string &name);
+
+ /// isTargetMatch - Returns 'true' if the memory buffer is for the specified
+ /// target triple.
+ static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
+ const char *triplePrefix);
+
+ /// makeLTOModule - Create an LTOModule (private version). N.B. This
+ /// method takes ownership of the buffer.
+ static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
+ std::string &errMsg);
+
+ /// makeBuffer - Create a MemoryBuffer from a memory range.
+ static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length);
+};
+
+#endif // LTO_MODULE_H
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