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-rw-r--r--contrib/llvm/tools/lto/LTOCodeGenerator.cpp416
-rw-r--r--contrib/llvm/tools/lto/LTOCodeGenerator.h68
-rw-r--r--contrib/llvm/tools/lto/LTOModule.cpp525
-rw-r--r--contrib/llvm/tools/lto/LTOModule.h110
-rw-r--r--contrib/llvm/tools/lto/Makefile47
-rw-r--r--contrib/llvm/tools/lto/lto.cpp257
-rw-r--r--contrib/llvm/tools/lto/lto.exports23
7 files changed, 1446 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lto/LTOCodeGenerator.cpp b/contrib/llvm/tools/lto/LTOCodeGenerator.cpp
new file mode 100644
index 0000000..59e8405
--- /dev/null
+++ b/contrib/llvm/tools/lto/LTOCodeGenerator.cpp
@@ -0,0 +1,416 @@
+//===-LTOCodeGenerator.cpp - 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 implements the Link Time Optimization library. This library is
+// intended to be used by linker to optimize code at link time.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LTOModule.h"
+#include "LTOCodeGenerator.h"
+
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Linker.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Target/TargetSelect.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/StandardPasses.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/System/Host.h"
+#include "llvm/System/Program.h"
+#include "llvm/System/Signals.h"
+#include "llvm/Config/config.h"
+#include <cstdlib>
+#include <unistd.h>
+#include <fcntl.h>
+
+
+using namespace llvm;
+
+static cl::opt<bool> DisableInline("disable-inlining",
+ cl::desc("Do not run the inliner pass"));
+
+
+const char* LTOCodeGenerator::getVersionString()
+{
+#ifdef LLVM_VERSION_INFO
+ return PACKAGE_NAME " version " PACKAGE_VERSION ", " LLVM_VERSION_INFO;
+#else
+ return PACKAGE_NAME " version " PACKAGE_VERSION;
+#endif
+}
+
+
+LTOCodeGenerator::LTOCodeGenerator()
+ : _context(getGlobalContext()),
+ _linker("LinkTimeOptimizer", "ld-temp.o", _context), _target(NULL),
+ _emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
+ _codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
+ _nativeObjectFile(NULL), _assemblerPath(NULL)
+{
+ InitializeAllTargets();
+ InitializeAllAsmPrinters();
+}
+
+LTOCodeGenerator::~LTOCodeGenerator()
+{
+ delete _target;
+ delete _nativeObjectFile;
+}
+
+
+
+bool LTOCodeGenerator::addModule(LTOModule* mod, std::string& errMsg)
+{
+ return _linker.LinkInModule(mod->getLLVVMModule(), &errMsg);
+}
+
+
+bool LTOCodeGenerator::setDebugInfo(lto_debug_model debug, std::string& errMsg)
+{
+ switch (debug) {
+ case LTO_DEBUG_MODEL_NONE:
+ _emitDwarfDebugInfo = false;
+ return false;
+
+ case LTO_DEBUG_MODEL_DWARF:
+ _emitDwarfDebugInfo = true;
+ return false;
+ }
+ errMsg = "unknown debug format";
+ return true;
+}
+
+
+bool LTOCodeGenerator::setCodePICModel(lto_codegen_model model,
+ std::string& errMsg)
+{
+ switch (model) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ _codeModel = model;
+ return false;
+ }
+ errMsg = "unknown pic model";
+ return true;
+}
+
+void LTOCodeGenerator::setAssemblerPath(const char* path)
+{
+ if ( _assemblerPath )
+ delete _assemblerPath;
+ _assemblerPath = new sys::Path(path);
+}
+
+void LTOCodeGenerator::addMustPreserveSymbol(const char* sym)
+{
+ _mustPreserveSymbols[sym] = 1;
+}
+
+
+bool LTOCodeGenerator::writeMergedModules(const char *path,
+ std::string &errMsg) {
+ if (determineTarget(errMsg))
+ return true;
+
+ // mark which symbols can not be internalized
+ applyScopeRestrictions();
+
+ // create output file
+ std::string ErrInfo;
+ raw_fd_ostream Out(path, ErrInfo,
+ raw_fd_ostream::F_Binary);
+ if (!ErrInfo.empty()) {
+ errMsg = "could not open bitcode file for writing: ";
+ errMsg += path;
+ return true;
+ }
+
+ // write bitcode to it
+ WriteBitcodeToFile(_linker.getModule(), Out);
+
+ if (Out.has_error()) {
+ errMsg = "could not write bitcode file: ";
+ errMsg += path;
+ return true;
+ }
+
+ return false;
+}
+
+
+const void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg)
+{
+ // make unique temp .s file to put generated assembly code
+ sys::Path uniqueAsmPath("lto-llvm.s");
+ if ( uniqueAsmPath.createTemporaryFileOnDisk(true, &errMsg) )
+ return NULL;
+ sys::RemoveFileOnSignal(uniqueAsmPath);
+
+ // generate assembly code
+ bool genResult = false;
+ {
+ raw_fd_ostream asmFD(uniqueAsmPath.c_str(), errMsg);
+ formatted_raw_ostream asmFile(asmFD);
+ if (!errMsg.empty())
+ return NULL;
+ genResult = this->generateAssemblyCode(asmFile, errMsg);
+ }
+ if ( genResult ) {
+ if ( uniqueAsmPath.exists() )
+ uniqueAsmPath.eraseFromDisk();
+ return NULL;
+ }
+
+ // make unique temp .o file to put generated object file
+ sys::PathWithStatus uniqueObjPath("lto-llvm.o");
+ if ( uniqueObjPath.createTemporaryFileOnDisk(true, &errMsg) ) {
+ if ( uniqueAsmPath.exists() )
+ uniqueAsmPath.eraseFromDisk();
+ return NULL;
+ }
+ sys::RemoveFileOnSignal(uniqueObjPath);
+
+ // assemble the assembly code
+ const std::string& uniqueObjStr = uniqueObjPath.str();
+ bool asmResult = this->assemble(uniqueAsmPath.str(), uniqueObjStr, errMsg);
+ if ( !asmResult ) {
+ // remove old buffer if compile() called twice
+ delete _nativeObjectFile;
+
+ // read .o file into memory buffer
+ _nativeObjectFile = MemoryBuffer::getFile(uniqueObjStr.c_str(),&errMsg);
+ }
+
+ // remove temp files
+ uniqueAsmPath.eraseFromDisk();
+ uniqueObjPath.eraseFromDisk();
+
+ // return buffer, unless error
+ if ( _nativeObjectFile == NULL )
+ return NULL;
+ *length = _nativeObjectFile->getBufferSize();
+ return _nativeObjectFile->getBufferStart();
+}
+
+
+bool LTOCodeGenerator::assemble(const std::string& asmPath,
+ const std::string& objPath, std::string& errMsg)
+{
+ sys::Path tool;
+ bool needsCompilerOptions = true;
+ if ( _assemblerPath ) {
+ tool = *_assemblerPath;
+ needsCompilerOptions = false;
+ } else {
+ // find compiler driver
+ tool = sys::Program::FindProgramByName("gcc");
+ if ( tool.isEmpty() ) {
+ errMsg = "can't locate gcc";
+ return true;
+ }
+ }
+
+ // build argument list
+ std::vector<const char*> args;
+ llvm::Triple targetTriple(_linker.getModule()->getTargetTriple());
+ const char *arch = targetTriple.getArchNameForAssembler();
+
+ args.push_back(tool.c_str());
+
+ if (targetTriple.getOS() == Triple::Darwin) {
+ // darwin specific command line options
+ if (arch != NULL) {
+ args.push_back("-arch");
+ args.push_back(arch);
+ }
+ // add -static to assembler command line when code model requires
+ if ( (_assemblerPath != NULL) &&
+ (_codeModel == LTO_CODEGEN_PIC_MODEL_STATIC) )
+ args.push_back("-static");
+ }
+ if ( needsCompilerOptions ) {
+ args.push_back("-c");
+ args.push_back("-x");
+ args.push_back("assembler");
+ }
+ args.push_back("-o");
+ args.push_back(objPath.c_str());
+ args.push_back(asmPath.c_str());
+ args.push_back(0);
+
+ // invoke assembler
+ if ( sys::Program::ExecuteAndWait(tool, &args[0], 0, 0, 0, 0, &errMsg) ) {
+ errMsg = "error in assembly";
+ return true;
+ }
+ return false; // success
+}
+
+
+
+bool LTOCodeGenerator::determineTarget(std::string& errMsg)
+{
+ if ( _target == NULL ) {
+ std::string Triple = _linker.getModule()->getTargetTriple();
+ if (Triple.empty())
+ Triple = sys::getHostTriple();
+
+ // create target machine from info for merged modules
+ const Target *march = TargetRegistry::lookupTarget(Triple, errMsg);
+ if ( march == NULL )
+ return true;
+
+ // The relocation model is actually a static member of TargetMachine
+ // and needs to be set before the TargetMachine is instantiated.
+ switch( _codeModel ) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ TargetMachine::setRelocationModel(Reloc::Static);
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ TargetMachine::setRelocationModel(Reloc::PIC_);
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ TargetMachine::setRelocationModel(Reloc::DynamicNoPIC);
+ break;
+ }
+
+ // construct LTModule, hand over ownership of module and target
+ SubtargetFeatures Features;
+ Features.getDefaultSubtargetFeatures("" /* cpu */, llvm::Triple(Triple));
+ std::string FeatureStr = Features.getString();
+ _target = march->createTargetMachine(Triple, FeatureStr);
+ }
+ return false;
+}
+
+void LTOCodeGenerator::applyScopeRestrictions() {
+ if (_scopeRestrictionsDone) return;
+ Module *mergedModule = _linker.getModule();
+
+ // Start off with a verification pass.
+ PassManager passes;
+ passes.add(createVerifierPass());
+
+ // mark which symbols can not be internalized
+ if (!_mustPreserveSymbols.empty()) {
+ MCContext Context(*_target->getMCAsmInfo());
+ Mangler mangler(Context, *_target->getTargetData());
+ std::vector<const char*> mustPreserveList;
+ for (Module::iterator f = mergedModule->begin(),
+ e = mergedModule->end(); f != e; ++f) {
+ if (!f->isDeclaration() &&
+ _mustPreserveSymbols.count(mangler.getNameWithPrefix(f)))
+ mustPreserveList.push_back(::strdup(f->getNameStr().c_str()));
+ }
+ for (Module::global_iterator v = mergedModule->global_begin(),
+ e = mergedModule->global_end(); v != e; ++v) {
+ if (!v->isDeclaration() &&
+ _mustPreserveSymbols.count(mangler.getNameWithPrefix(v)))
+ mustPreserveList.push_back(::strdup(v->getNameStr().c_str()));
+ }
+ passes.add(createInternalizePass(mustPreserveList));
+ }
+
+ // apply scope restrictions
+ passes.run(*mergedModule);
+
+ _scopeRestrictionsDone = true;
+}
+
+/// Optimize merged modules using various IPO passes
+bool LTOCodeGenerator::generateAssemblyCode(formatted_raw_ostream& out,
+ std::string& errMsg)
+{
+ if ( this->determineTarget(errMsg) )
+ return true;
+
+ // mark which symbols can not be internalized
+ this->applyScopeRestrictions();
+
+ Module* mergedModule = _linker.getModule();
+
+ // if options were requested, set them
+ if ( !_codegenOptions.empty() )
+ cl::ParseCommandLineOptions(_codegenOptions.size(),
+ const_cast<char **>(&_codegenOptions[0]));
+
+ // Instantiate the pass manager to organize the passes.
+ PassManager passes;
+
+ // Start off with a verification pass.
+ passes.add(createVerifierPass());
+
+ // Add an appropriate TargetData instance for this module...
+ passes.add(new TargetData(*_target->getTargetData()));
+
+ createStandardLTOPasses(&passes, /*Internalize=*/ false, !DisableInline,
+ /*VerifyEach=*/ false);
+
+ // Make sure everything is still good.
+ passes.add(createVerifierPass());
+
+ FunctionPassManager* codeGenPasses = new FunctionPassManager(mergedModule);
+
+ codeGenPasses->add(new TargetData(*_target->getTargetData()));
+
+ if (_target->addPassesToEmitFile(*codeGenPasses, out,
+ TargetMachine::CGFT_AssemblyFile,
+ CodeGenOpt::Aggressive)) {
+ errMsg = "target file type not supported";
+ return true;
+ }
+
+ // Run our queue of passes all at once now, efficiently.
+ passes.run(*mergedModule);
+
+ // Run the code generator, and write assembly file
+ codeGenPasses->doInitialization();
+
+ for (Module::iterator
+ it = mergedModule->begin(), e = mergedModule->end(); it != e; ++it)
+ if (!it->isDeclaration())
+ codeGenPasses->run(*it);
+
+ codeGenPasses->doFinalization();
+
+ return false; // success
+}
+
+
+/// Optimize merged modules using various IPO passes
+void LTOCodeGenerator::setCodeGenDebugOptions(const char* options)
+{
+ for (std::pair<StringRef, StringRef> o = getToken(options);
+ !o.first.empty(); o = getToken(o.second)) {
+ // ParseCommandLineOptions() expects argv[0] to be program name.
+ // Lazily add that.
+ if ( _codegenOptions.empty() )
+ _codegenOptions.push_back("libLTO");
+ _codegenOptions.push_back(strdup(o.first.str().c_str()));
+ }
+}
diff --git a/contrib/llvm/tools/lto/LTOCodeGenerator.h b/contrib/llvm/tools/lto/LTOCodeGenerator.h
new file mode 100644
index 0000000..cac3b8c
--- /dev/null
+++ b/contrib/llvm/tools/lto/LTOCodeGenerator.h
@@ -0,0 +1,68 @@
+//===-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.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LTO_CODE_GENERATOR_H
+#define LTO_CODE_GENERATOR_H
+
+#include "llvm/Linker.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/SmallVector.h"
+
+#include <string>
+
+
+//
+// C++ class which implements the opaque lto_code_gen_t
+//
+
+struct LTOCodeGenerator {
+ static const char* getVersionString();
+
+ LTOCodeGenerator();
+ ~LTOCodeGenerator();
+
+ bool addModule(struct LTOModule*, std::string& errMsg);
+ bool setDebugInfo(lto_debug_model, std::string& errMsg);
+ bool setCodePICModel(lto_codegen_model, std::string& errMsg);
+ void setAssemblerPath(const char* path);
+ void addMustPreserveSymbol(const char* sym);
+ bool writeMergedModules(const char* path,
+ std::string& errMsg);
+ const void* compile(size_t* length, std::string& errMsg);
+ void setCodeGenDebugOptions(const char *opts);
+private:
+ bool generateAssemblyCode(llvm::formatted_raw_ostream& out,
+ std::string& errMsg);
+ bool assemble(const std::string& asmPath,
+ const std::string& objPath, std::string& errMsg);
+ void applyScopeRestrictions();
+ bool determineTarget(std::string& errMsg);
+
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ llvm::LLVMContext& _context;
+ llvm::Linker _linker;
+ llvm::TargetMachine* _target;
+ bool _emitDwarfDebugInfo;
+ bool _scopeRestrictionsDone;
+ lto_codegen_model _codeModel;
+ StringSet _mustPreserveSymbols;
+ llvm::MemoryBuffer* _nativeObjectFile;
+ std::vector<const char*> _codegenOptions;
+ llvm::sys::Path* _assemblerPath;
+};
+
+#endif // LTO_CODE_GENERATOR_H
+
diff --git a/contrib/llvm/tools/lto/LTOModule.cpp b/contrib/llvm/tools/lto/LTOModule.cpp
new file mode 100644
index 0000000..0870205
--- /dev/null
+++ b/contrib/llvm/tools/lto/LTOModule.cpp
@@ -0,0 +1,525 @@
+//===-- LTOModule.cpp - 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 implements the Link Time Optimization library. This library is
+// intended to be used by linker to optimize code at link time.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LTOModule.h"
+
+#include "llvm/Constants.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/System/Host.h"
+#include "llvm/System/Path.h"
+#include "llvm/System/Process.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Target/TargetSelect.h"
+
+using namespace llvm;
+
+bool LTOModule::isBitcodeFile(const void* mem, size_t length)
+{
+ return llvm::sys::IdentifyFileType((char*)mem, length)
+ == llvm::sys::Bitcode_FileType;
+}
+
+bool LTOModule::isBitcodeFile(const char* path)
+{
+ return llvm::sys::Path(path).isBitcodeFile();
+}
+
+bool LTOModule::isBitcodeFileForTarget(const void* mem, size_t length,
+ const char* triplePrefix)
+{
+ MemoryBuffer* buffer = makeBuffer(mem, length);
+ if (!buffer)
+ return false;
+ return isTargetMatch(buffer, triplePrefix);
+}
+
+
+bool LTOModule::isBitcodeFileForTarget(const char* path,
+ const char* triplePrefix)
+{
+ MemoryBuffer *buffer = MemoryBuffer::getFile(path);
+ if (buffer == NULL)
+ return false;
+ return isTargetMatch(buffer, triplePrefix);
+}
+
+// takes ownership of buffer
+bool LTOModule::isTargetMatch(MemoryBuffer* buffer, const char* triplePrefix)
+{
+ OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext()));
+ // on success, m owns buffer and both are deleted at end of this method
+ if (!m) {
+ delete buffer;
+ return false;
+ }
+ std::string actualTarget = m->getTargetTriple();
+ return (strncmp(actualTarget.c_str(), triplePrefix,
+ strlen(triplePrefix)) == 0);
+}
+
+
+LTOModule::LTOModule(Module* m, TargetMachine* t)
+ : _module(m), _target(t), _symbolsParsed(false)
+{
+}
+
+LTOModule* LTOModule::makeLTOModule(const char* path,
+ std::string& errMsg)
+{
+ OwningPtr<MemoryBuffer> buffer(MemoryBuffer::getFile(path, &errMsg));
+ if (!buffer)
+ return NULL;
+ return makeLTOModule(buffer.get(), errMsg);
+}
+
+/// makeBuffer - create a MemoryBuffer from a memory range.
+/// MemoryBuffer requires the byte past end of the buffer to be a zero.
+/// We might get lucky and already be that way, otherwise make a copy.
+/// Also if next byte is on a different page, don't assume it is readable.
+MemoryBuffer* LTOModule::makeBuffer(const void* mem, size_t length)
+{
+ const char *startPtr = (char*)mem;
+ const char *endPtr = startPtr+length;
+ if (((uintptr_t)endPtr & (sys::Process::GetPageSize()-1)) == 0 ||
+ *endPtr != 0)
+ return MemoryBuffer::getMemBufferCopy(StringRef(startPtr, length));
+
+ return MemoryBuffer::getMemBuffer(StringRef(startPtr, length));
+}
+
+
+LTOModule* LTOModule::makeLTOModule(const void* mem, size_t length,
+ std::string& errMsg)
+{
+ OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length));
+ if (!buffer)
+ return NULL;
+ return makeLTOModule(buffer.get(), errMsg);
+}
+
+LTOModule* LTOModule::makeLTOModule(MemoryBuffer* buffer,
+ std::string& errMsg)
+{
+ InitializeAllTargets();
+
+ // parse bitcode buffer
+ OwningPtr<Module> m(ParseBitcodeFile(buffer, getGlobalContext(), &errMsg));
+ if (!m)
+ return NULL;
+
+ std::string Triple = m->getTargetTriple();
+ if (Triple.empty())
+ Triple = sys::getHostTriple();
+
+ // find machine architecture for this module
+ const Target* march = TargetRegistry::lookupTarget(Triple, errMsg);
+ if (!march)
+ return NULL;
+
+ // construct LTModule, hand over ownership of module and target
+ SubtargetFeatures Features;
+ Features.getDefaultSubtargetFeatures("" /* cpu */, llvm::Triple(Triple));
+ std::string FeatureStr = Features.getString();
+ TargetMachine* target = march->createTargetMachine(Triple, FeatureStr);
+ return new LTOModule(m.take(), target);
+}
+
+
+const char* LTOModule::getTargetTriple()
+{
+ return _module->getTargetTriple().c_str();
+}
+
+void LTOModule::addDefinedFunctionSymbol(Function* f, Mangler &mangler)
+{
+ // add to list of defined symbols
+ addDefinedSymbol(f, mangler, true);
+
+ // add external symbols referenced by this function.
+ for (Function::iterator b = f->begin(); b != f->end(); ++b) {
+ for (BasicBlock::iterator i = b->begin(); i != b->end(); ++i) {
+ for (unsigned count = 0, total = i->getNumOperands();
+ count != total; ++count) {
+ findExternalRefs(i->getOperand(count), mangler);
+ }
+ }
+ }
+}
+
+// get string that data pointer points to
+bool LTOModule::objcClassNameFromExpression(Constant* c, std::string& name)
+{
+ if (ConstantExpr* ce = dyn_cast<ConstantExpr>(c)) {
+ Constant* op = ce->getOperand(0);
+ if (GlobalVariable* gvn = dyn_cast<GlobalVariable>(op)) {
+ Constant* cn = gvn->getInitializer();
+ if (ConstantArray* ca = dyn_cast<ConstantArray>(cn)) {
+ if (ca->isCString()) {
+ name = ".objc_class_name_" + ca->getAsString();
+ return true;
+ }
+ }
+ }
+ }
+ return false;
+}
+
+// parse i386/ppc ObjC class data structure
+void LTOModule::addObjCClass(GlobalVariable* clgv)
+{
+ if (ConstantStruct* c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
+ // second slot in __OBJC,__class is pointer to superclass name
+ std::string superclassName;
+ if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
+ NameAndAttributes info;
+ if (_undefines.find(superclassName.c_str()) == _undefines.end()) {
+ const char* symbolName = ::strdup(superclassName.c_str());
+ info.name = ::strdup(symbolName);
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ // string is owned by _undefines
+ _undefines[info.name] = info;
+ }
+ }
+ // third slot in __OBJC,__class is pointer to class name
+ std::string className;
+ if (objcClassNameFromExpression(c->getOperand(2), className)) {
+ const char* symbolName = ::strdup(className.c_str());
+ NameAndAttributes info;
+ info.name = symbolName;
+ info.attributes = (lto_symbol_attributes)
+ (LTO_SYMBOL_PERMISSIONS_DATA |
+ LTO_SYMBOL_DEFINITION_REGULAR |
+ LTO_SYMBOL_SCOPE_DEFAULT);
+ _symbols.push_back(info);
+ _defines[info.name] = 1;
+ }
+ }
+}
+
+
+// parse i386/ppc ObjC category data structure
+void LTOModule::addObjCCategory(GlobalVariable* clgv)
+{
+ if (ConstantStruct* c = dyn_cast<ConstantStruct>(clgv->getInitializer())) {
+ // second slot in __OBJC,__category is pointer to target class name
+ std::string targetclassName;
+ if (objcClassNameFromExpression(c->getOperand(1), targetclassName)) {
+ NameAndAttributes info;
+ if (_undefines.find(targetclassName.c_str()) == _undefines.end()) {
+ const char* symbolName = ::strdup(targetclassName.c_str());
+ info.name = ::strdup(symbolName);
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ // string is owned by _undefines
+ _undefines[info.name] = info;
+ }
+ }
+ }
+}
+
+
+// parse i386/ppc ObjC class list data structure
+void LTOModule::addObjCClassRef(GlobalVariable* clgv)
+{
+ std::string targetclassName;
+ if (objcClassNameFromExpression(clgv->getInitializer(), targetclassName)) {
+ NameAndAttributes info;
+ if (_undefines.find(targetclassName.c_str()) == _undefines.end()) {
+ const char* symbolName = ::strdup(targetclassName.c_str());
+ info.name = ::strdup(symbolName);
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ // string is owned by _undefines
+ _undefines[info.name] = info;
+ }
+ }
+}
+
+
+void LTOModule::addDefinedDataSymbol(GlobalValue* v, Mangler& mangler)
+{
+ // add to list of defined symbols
+ addDefinedSymbol(v, mangler, false);
+
+ // Special case i386/ppc ObjC data structures in magic sections:
+ // The issue is that the old ObjC object format did some strange
+ // contortions to avoid real linker symbols. For instance, the
+ // ObjC class data structure is allocated statically in the executable
+ // that defines that class. That data structures contains a pointer to
+ // its superclass. But instead of just initializing that part of the
+ // struct to the address of its superclass, and letting the static and
+ // dynamic linkers do the rest, the runtime works by having that field
+ // instead point to a C-string that is the name of the superclass.
+ // At runtime the objc initialization updates that pointer and sets
+ // it to point to the actual super class. As far as the linker
+ // knows it is just a pointer to a string. But then someone wanted the
+ // linker to issue errors at build time if the superclass was not found.
+ // So they figured out a way in mach-o object format to use an absolute
+ // symbols (.objc_class_name_Foo = 0) and a floating reference
+ // (.reference .objc_class_name_Bar) to cause the linker into erroring when
+ // a class was missing.
+ // The following synthesizes the implicit .objc_* symbols for the linker
+ // from the ObjC data structures generated by the front end.
+ if (v->hasSection() /* && isTargetDarwin */) {
+ // special case if this data blob is an ObjC class definition
+ if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
+ if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCClass(gv);
+ }
+ }
+
+ // special case if this data blob is an ObjC category definition
+ else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
+ if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCCategory(gv);
+ }
+ }
+
+ // special case if this data blob is the list of referenced classes
+ else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
+ if (GlobalVariable* gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCClassRef(gv);
+ }
+ }
+ }
+
+ // add external symbols referenced by this data.
+ for (unsigned count = 0, total = v->getNumOperands();
+ count != total; ++count) {
+ findExternalRefs(v->getOperand(count), mangler);
+ }
+}
+
+
+void LTOModule::addDefinedSymbol(GlobalValue* def, Mangler &mangler,
+ bool isFunction)
+{
+ // ignore all llvm.* symbols
+ if (def->getName().startswith("llvm."))
+ return;
+
+ // string is owned by _defines
+ const char* symbolName = ::strdup(mangler.getNameWithPrefix(def).c_str());
+
+ // set alignment part log2() can have rounding errors
+ uint32_t align = def->getAlignment();
+ uint32_t attr = align ? CountTrailingZeros_32(def->getAlignment()) : 0;
+
+ // set permissions part
+ if (isFunction)
+ attr |= LTO_SYMBOL_PERMISSIONS_CODE;
+ else {
+ GlobalVariable* gv = dyn_cast<GlobalVariable>(def);
+ if (gv && gv->isConstant())
+ attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
+ else
+ attr |= LTO_SYMBOL_PERMISSIONS_DATA;
+ }
+
+ // set definition part
+ if (def->hasWeakLinkage() || def->hasLinkOnceLinkage()) {
+ attr |= LTO_SYMBOL_DEFINITION_WEAK;
+ }
+ else if (def->hasCommonLinkage()) {
+ attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
+ }
+ else {
+ attr |= LTO_SYMBOL_DEFINITION_REGULAR;
+ }
+
+ // set scope part
+ if (def->hasHiddenVisibility())
+ attr |= LTO_SYMBOL_SCOPE_HIDDEN;
+ else if (def->hasProtectedVisibility())
+ attr |= LTO_SYMBOL_SCOPE_PROTECTED;
+ else if (def->hasExternalLinkage() || def->hasWeakLinkage()
+ || def->hasLinkOnceLinkage() || def->hasCommonLinkage())
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ else
+ attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+
+ // add to table of symbols
+ NameAndAttributes info;
+ info.name = symbolName;
+ info.attributes = (lto_symbol_attributes)attr;
+ _symbols.push_back(info);
+ _defines[info.name] = 1;
+}
+
+void LTOModule::addAsmGlobalSymbol(const char *name) {
+ // only add new define if not already defined
+ if (_defines.count(name) == 0)
+ return;
+
+ // string is owned by _defines
+ const char *symbolName = ::strdup(name);
+ uint32_t attr = LTO_SYMBOL_DEFINITION_REGULAR;
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ NameAndAttributes info;
+ info.name = symbolName;
+ info.attributes = (lto_symbol_attributes)attr;
+ _symbols.push_back(info);
+ _defines[info.name] = 1;
+}
+
+void LTOModule::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
+{
+ // ignore all llvm.* symbols
+ if (decl->getName().startswith("llvm."))
+ return;
+
+ // ignore all aliases
+ if (isa<GlobalAlias>(decl))
+ return;
+
+ std::string name = mangler.getNameWithPrefix(decl);
+
+ // we already have the symbol
+ if (_undefines.find(name) != _undefines.end())
+ return;
+
+ NameAndAttributes info;
+ // string is owned by _undefines
+ info.name = ::strdup(name.c_str());
+ if (decl->hasExternalWeakLinkage())
+ info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
+ else
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ _undefines[name] = info;
+}
+
+
+
+// Find external symbols referenced by VALUE. This is a recursive function.
+void LTOModule::findExternalRefs(Value* value, Mangler &mangler) {
+
+ if (GlobalValue* gv = dyn_cast<GlobalValue>(value)) {
+ if (!gv->hasExternalLinkage())
+ addPotentialUndefinedSymbol(gv, mangler);
+ // If this is a variable definition, do not recursively process
+ // initializer. It might contain a reference to this variable
+ // and cause an infinite loop. The initializer will be
+ // processed in addDefinedDataSymbol().
+ return;
+ }
+
+ // GlobalValue, even with InternalLinkage type, may have operands with
+ // ExternalLinkage type. Do not ignore these operands.
+ if (Constant* c = dyn_cast<Constant>(value)) {
+ // Handle ConstantExpr, ConstantStruct, ConstantArry etc.
+ for (unsigned i = 0, e = c->getNumOperands(); i != e; ++i)
+ findExternalRefs(c->getOperand(i), mangler);
+ }
+}
+
+void LTOModule::lazyParseSymbols()
+{
+ if (!_symbolsParsed) {
+ _symbolsParsed = true;
+
+ // Use mangler to add GlobalPrefix to names to match linker names.
+ MCContext Context(*_target->getMCAsmInfo());
+ Mangler mangler(Context, *_target->getTargetData());
+
+ // add functions
+ for (Module::iterator f = _module->begin(); f != _module->end(); ++f) {
+ if (f->isDeclaration())
+ addPotentialUndefinedSymbol(f, mangler);
+ else
+ addDefinedFunctionSymbol(f, mangler);
+ }
+
+ // add data
+ for (Module::global_iterator v = _module->global_begin(),
+ e = _module->global_end(); v != e; ++v) {
+ if (v->isDeclaration())
+ addPotentialUndefinedSymbol(v, mangler);
+ else
+ addDefinedDataSymbol(v, mangler);
+ }
+
+ // add asm globals
+ const std::string &inlineAsm = _module->getModuleInlineAsm();
+ const std::string glbl = ".globl";
+ std::string asmSymbolName;
+ std::string::size_type pos = inlineAsm.find(glbl, 0);
+ while (pos != std::string::npos) {
+ // eat .globl
+ pos = pos + 6;
+
+ // skip white space between .globl and symbol name
+ std::string::size_type pbegin = inlineAsm.find_first_not_of(' ', pos);
+ if (pbegin == std::string::npos)
+ break;
+
+ // find end-of-line
+ std::string::size_type pend = inlineAsm.find_first_of('\n', pbegin);
+ if (pend == std::string::npos)
+ break;
+
+ asmSymbolName.assign(inlineAsm, pbegin, pend - pbegin);
+ addAsmGlobalSymbol(asmSymbolName.c_str());
+
+ // search next .globl
+ pos = inlineAsm.find(glbl, pend);
+ }
+
+ // make symbols for all undefines
+ for (StringMap<NameAndAttributes>::iterator it=_undefines.begin();
+ it != _undefines.end(); ++it) {
+ // if this symbol also has a definition, then don't make an undefine
+ // because it is a tentative definition
+ if (_defines.count(it->getKey()) == 0) {
+ NameAndAttributes info = it->getValue();
+ _symbols.push_back(info);
+ }
+ }
+ }
+}
+
+
+uint32_t LTOModule::getSymbolCount()
+{
+ lazyParseSymbols();
+ return _symbols.size();
+}
+
+
+lto_symbol_attributes LTOModule::getSymbolAttributes(uint32_t index)
+{
+ lazyParseSymbols();
+ if (index < _symbols.size())
+ return _symbols[index].attributes;
+ else
+ return lto_symbol_attributes(0);
+}
+
+const char* LTOModule::getSymbolName(uint32_t index)
+{
+ lazyParseSymbols();
+ if (index < _symbols.size())
+ return _symbols[index].name;
+ else
+ return NULL;
+}
diff --git a/contrib/llvm/tools/lto/LTOModule.h b/contrib/llvm/tools/lto/LTOModule.h
new file mode 100644
index 0000000..7f475d4
--- /dev/null
+++ b/contrib/llvm/tools/lto/LTOModule.h
@@ -0,0 +1,110 @@
+//===-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/Module.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/ADT/StringMap.h"
+
+#include "llvm-c/lto.h"
+
+#include <vector>
+#include <string>
+
+
+// forward references to llvm classes
+namespace llvm {
+ class Mangler;
+ class MemoryBuffer;
+ class GlobalValue;
+ class Value;
+ class Function;
+}
+
+
+//
+// C++ class which implements the opaque lto_module_t
+//
+struct LTOModule {
+
+ static bool isBitcodeFile(const void* mem, size_t length);
+ static bool isBitcodeFile(const char* path);
+
+ static bool isBitcodeFileForTarget(const void* mem,
+ size_t length, const char* triplePrefix);
+
+ static bool isBitcodeFileForTarget(const char* path,
+ const char* triplePrefix);
+
+ static LTOModule* makeLTOModule(const char* path,
+ std::string& errMsg);
+ static LTOModule* makeLTOModule(const void* mem, size_t length,
+ std::string& errMsg);
+
+ const char* getTargetTriple();
+ uint32_t getSymbolCount();
+ lto_symbol_attributes getSymbolAttributes(uint32_t index);
+ const char* getSymbolName(uint32_t index);
+
+ llvm::Module * getLLVVMModule() { return _module.get(); }
+
+private:
+ LTOModule(llvm::Module* m, llvm::TargetMachine* t);
+
+ void lazyParseSymbols();
+ void addDefinedSymbol(llvm::GlobalValue* def,
+ llvm::Mangler& mangler,
+ bool isFunction);
+ void addPotentialUndefinedSymbol(llvm::GlobalValue* decl,
+ llvm::Mangler &mangler);
+ void findExternalRefs(llvm::Value* value,
+ llvm::Mangler& mangler);
+ void addDefinedFunctionSymbol(llvm::Function* f,
+ llvm::Mangler &mangler);
+ void addDefinedDataSymbol(llvm::GlobalValue* v,
+ llvm::Mangler &mangler);
+ void addAsmGlobalSymbol(const char *);
+ void addObjCClass(llvm::GlobalVariable* clgv);
+ void addObjCCategory(llvm::GlobalVariable* clgv);
+ void addObjCClassRef(llvm::GlobalVariable* clgv);
+ bool objcClassNameFromExpression(llvm::Constant* c,
+ std::string& name);
+
+ static bool isTargetMatch(llvm::MemoryBuffer* memBuffer,
+ const char* triplePrefix);
+
+ static LTOModule* makeLTOModule(llvm::MemoryBuffer* buffer,
+ std::string& errMsg);
+ static llvm::MemoryBuffer* makeBuffer(const void* mem, size_t length);
+
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ struct NameAndAttributes {
+ const char* name;
+ lto_symbol_attributes attributes;
+ };
+
+ llvm::OwningPtr<llvm::Module> _module;
+ llvm::OwningPtr<llvm::TargetMachine> _target;
+ bool _symbolsParsed;
+ std::vector<NameAndAttributes> _symbols;
+ // _defines and _undefines only needed to disambiguate tentative definitions
+ StringSet _defines;
+ llvm::StringMap<NameAndAttributes> _undefines;
+};
+
+#endif // LTO_MODULE_H
+
diff --git a/contrib/llvm/tools/lto/Makefile b/contrib/llvm/tools/lto/Makefile
new file mode 100644
index 0000000..8d57333
--- /dev/null
+++ b/contrib/llvm/tools/lto/Makefile
@@ -0,0 +1,47 @@
+##===- tools/lto/Makefile ----------------------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+LIBRARYNAME = LTO
+
+EXPORTED_SYMBOL_FILE = $(PROJ_SRC_DIR)/lto.exports
+
+# Include this here so we can get the configuration of the targets
+# that have been configured for construction. We have to do this
+# early so we can set up LINK_COMPONENTS before including Makefile.rules
+include $(LEVEL)/Makefile.config
+
+LINK_LIBS_IN_SHARED = 1
+SHARED_LIBRARY = 1
+
+LINK_COMPONENTS := $(TARGETS_TO_BUILD) ipo scalaropts linker bitreader bitwriter
+
+include $(LEVEL)/Makefile.common
+
+ifeq ($(HOST_OS),Darwin)
+ # set dylib internal version number to llvmCore submission number
+ ifdef LLVM_SUBMIT_VERSION
+ LLVMLibsOptions := $(LLVMLibsOptions) -Wl,-current_version \
+ -Wl,$(LLVM_SUBMIT_VERSION).$(LLVM_SUBMIT_SUBVERSION) \
+ -Wl,-compatibility_version -Wl,1
+ endif
+ # extra options to override libtool defaults
+ LLVMLibsOptions := $(LLVMLibsOptions) \
+ -avoid-version \
+ -Wl,-dead_strip \
+ -Wl,-seg1addr -Wl,0xE0000000
+
+ # Mac OS X 10.4 and earlier tools do not allow a second -install_name on command line
+ DARWIN_VERS := $(shell echo $(TARGET_TRIPLE) | sed 's/.*darwin\([0-9]*\).*/\1/')
+ ifneq ($(DARWIN_VERS),8)
+ LLVMLibsOptions := $(LLVMLibsOptions) \
+ -no-undefined -Wl,-install_name \
+ -Wl,"@executable_path/../lib/lib$(LIBRARYNAME)$(SHLIBEXT)"
+ endif
+endif
diff --git a/contrib/llvm/tools/lto/lto.cpp b/contrib/llvm/tools/lto/lto.cpp
new file mode 100644
index 0000000..cc841bd
--- /dev/null
+++ b/contrib/llvm/tools/lto/lto.cpp
@@ -0,0 +1,257 @@
+//===-lto.cpp - 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 implements the Link Time Optimization library. This library is
+// intended to be used by linker to optimize code at link time.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm-c/lto.h"
+#include "llvm-c/Core.h"
+
+#include "LTOModule.h"
+#include "LTOCodeGenerator.h"
+
+
+// holds most recent error string
+// *** not thread safe ***
+static std::string sLastErrorString;
+
+
+
+//
+// returns a printable string
+//
+extern const char* lto_get_version()
+{
+ return LTOCodeGenerator::getVersionString();
+}
+
+//
+// returns the last error string or NULL if last operation was successful
+//
+const char* lto_get_error_message()
+{
+ return sLastErrorString.c_str();
+}
+
+
+
+//
+// validates if a file is a loadable object file
+//
+bool lto_module_is_object_file(const char* path)
+{
+ return LTOModule::isBitcodeFile(path);
+}
+
+
+//
+// validates if a file is a loadable object file compilable for requested target
+//
+bool lto_module_is_object_file_for_target(const char* path,
+ const char* target_triplet_prefix)
+{
+ return LTOModule::isBitcodeFileForTarget(path, target_triplet_prefix);
+}
+
+
+//
+// validates if a buffer is a loadable object file
+//
+bool lto_module_is_object_file_in_memory(const void* mem, size_t length)
+{
+ return LTOModule::isBitcodeFile(mem, length);
+}
+
+
+//
+// validates if a buffer is a loadable object file compilable for the target
+//
+bool lto_module_is_object_file_in_memory_for_target(const void* mem,
+ size_t length, const char* target_triplet_prefix)
+{
+ return LTOModule::isBitcodeFileForTarget(mem, length, target_triplet_prefix);
+}
+
+
+
+//
+// loads an object file from disk
+// returns NULL on error (check lto_get_error_message() for details)
+//
+lto_module_t lto_module_create(const char* path)
+{
+ return LTOModule::makeLTOModule(path, sLastErrorString);
+}
+
+
+//
+// loads an object file from memory
+// returns NULL on error (check lto_get_error_message() for details)
+//
+lto_module_t lto_module_create_from_memory(const void* mem, size_t length)
+{
+ return LTOModule::makeLTOModule(mem, length, sLastErrorString);
+}
+
+
+//
+// frees all memory for a module
+// upon return the lto_module_t is no longer valid
+//
+void lto_module_dispose(lto_module_t mod)
+{
+ delete mod;
+}
+
+
+//
+// returns triplet string which the object module was compiled under
+//
+const char* lto_module_get_target_triple(lto_module_t mod)
+{
+ return mod->getTargetTriple();
+}
+
+
+//
+// returns the number of symbols in the object module
+//
+uint32_t lto_module_get_num_symbols(lto_module_t mod)
+{
+ return mod->getSymbolCount();
+}
+
+//
+// returns the name of the ith symbol in the object module
+//
+const char* lto_module_get_symbol_name(lto_module_t mod, uint32_t index)
+{
+ return mod->getSymbolName(index);
+}
+
+
+//
+// returns the attributes of the ith symbol in the object module
+//
+lto_symbol_attributes lto_module_get_symbol_attribute(lto_module_t mod,
+ uint32_t index)
+{
+ return mod->getSymbolAttributes(index);
+}
+
+
+
+
+
+//
+// instantiates a code generator
+// returns NULL if there is an error
+//
+lto_code_gen_t lto_codegen_create(void)
+{
+ return new LTOCodeGenerator();
+}
+
+
+
+//
+// frees all memory for a code generator
+// upon return the lto_code_gen_t is no longer valid
+//
+void lto_codegen_dispose(lto_code_gen_t cg)
+{
+ delete cg;
+}
+
+
+
+//
+// add an object module to the set of modules for which code will be generated
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_add_module(lto_code_gen_t cg, lto_module_t mod)
+{
+ return cg->addModule(mod, sLastErrorString);
+}
+
+
+//
+// sets what if any format of debug info should be generated
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model debug)
+{
+ return cg->setDebugInfo(debug, sLastErrorString);
+}
+
+
+//
+// sets what code model to generated
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model model)
+{
+ return cg->setCodePICModel(model, sLastErrorString);
+}
+
+//
+// sets the path to the assembler tool
+//
+void lto_codegen_set_assembler_path(lto_code_gen_t cg, const char* path)
+{
+ cg->setAssemblerPath(path);
+}
+
+//
+// adds to a list of all global symbols that must exist in the final
+// generated code. If a function is not listed there, it might be
+// inlined into every usage and optimized away.
+//
+void lto_codegen_add_must_preserve_symbol(lto_code_gen_t cg, const char* symbol)
+{
+ cg->addMustPreserveSymbol(symbol);
+}
+
+
+//
+// writes a new file at the specified path that contains the
+// merged contents of all modules added so far.
+// returns true on error (check lto_get_error_message() for details)
+//
+bool lto_codegen_write_merged_modules(lto_code_gen_t cg, const char* path)
+{
+ return cg->writeMergedModules(path, sLastErrorString);
+}
+
+
+//
+// Generates code for all added modules into one native object file.
+// On sucess returns a pointer to a generated mach-o/ELF buffer and
+// length set to the buffer size. The buffer is owned by the
+// lto_code_gen_t and will be freed when lto_codegen_dispose()
+// is called, or lto_codegen_compile() is called again.
+// On failure, returns NULL (check lto_get_error_message() for details).
+//
+extern const void*
+lto_codegen_compile(lto_code_gen_t cg, size_t* length)
+{
+ return cg->compile(length, sLastErrorString);
+}
+
+
+//
+// Used to pass extra options to the code generator
+//
+extern void
+lto_codegen_debug_options(lto_code_gen_t cg, const char * opt)
+{
+ cg->setCodeGenDebugOptions(opt);
+}
diff --git a/contrib/llvm/tools/lto/lto.exports b/contrib/llvm/tools/lto/lto.exports
new file mode 100644
index 0000000..9011cf6
--- /dev/null
+++ b/contrib/llvm/tools/lto/lto.exports
@@ -0,0 +1,23 @@
+lto_get_error_message
+lto_get_version
+lto_module_create
+lto_module_create_from_memory
+lto_module_get_num_symbols
+lto_module_get_symbol_attribute
+lto_module_get_symbol_name
+lto_module_get_target_triple
+lto_module_is_object_file
+lto_module_is_object_file_for_target
+lto_module_is_object_file_in_memory
+lto_module_is_object_file_in_memory_for_target
+lto_module_dispose
+lto_codegen_add_module
+lto_codegen_add_must_preserve_symbol
+lto_codegen_compile
+lto_codegen_create
+lto_codegen_dispose
+lto_codegen_set_debug_model
+lto_codegen_set_pic_model
+lto_codegen_write_merged_modules
+lto_codegen_debug_options
+lto_codegen_set_assembler_path
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