include $(LEVEL)/Makefile.config
-# Disable liblto as it is going away
-#PARALLEL_DIRS += lto
-
# only build new lto project on Darwin for now
ifeq ($(OS),Darwin)
-PARALLEL_DIRS += lto2
+PARALLEL_DIRS += lto
endif
include $(LEVEL)/Makefile.common
--- /dev/null
+//===-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/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/Linker.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ModuleProvider.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/System/Signals.h"
+#include "llvm/Analysis/Passes.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Analysis/LoadValueNumbering.h"
+#include "llvm/CodeGen/FileWriters.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Config/config.h"
+
+
+#include <fstream>
+#include <unistd.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+
+using namespace llvm;
+
+
+
+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()
+ : _linker("LinkTimeOptimizer", "ld-temp.o"), _target(NULL),
+ _emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
+ _codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
+ _nativeObjectFile(NULL)
+{
+
+}
+
+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::addMustPreserveSymbol(const char* sym)
+{
+ _mustPreserveSymbols[sym] = 1;
+}
+
+
+bool LTOCodeGenerator::writeMergedModules(const char* path, std::string& errMsg)
+{
+ if ( this->determineTarget(errMsg) )
+ return true;
+
+ // mark which symbols can not be internalized
+ this->applyScopeRestrictions();
+
+ // create output file
+ std::ofstream out(path, std::ios_base::out|std::ios::trunc|std::ios::binary);
+ if ( out.fail() ) {
+ errMsg = "could not open bitcode file for writing: ";
+ errMsg += path;
+ return true;
+ }
+
+ // write bitcode to it
+ WriteBitcodeToFile(_linker.getModule(), out);
+ if ( out.fail() ) {
+ 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
+ std::ofstream asmFile(uniqueAsmPath.c_str());
+ bool genResult = this->generateAssemblyCode(asmFile, errMsg);
+ asmFile.close();
+ 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.toString();
+ bool asmResult = this->assemble(uniqueAsmPath.toString(),
+ 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)
+{
+ // find compiler driver
+ const sys::Path gcc = sys::Program::FindProgramByName("gcc");
+ if ( gcc.isEmpty() ) {
+ errMsg = "can't locate gcc";
+ return true;
+ }
+
+ // build argument list
+ std::vector<const char*> args;
+ std::string targetTriple = _linker.getModule()->getTargetTriple();
+ args.push_back(gcc.c_str());
+ if ( targetTriple.find("darwin") != targetTriple.size() ) {
+ if (strncmp(targetTriple.c_str(), "i686-apple-", 11) == 0) {
+ args.push_back("-arch");
+ args.push_back("i386");
+ }
+ else if (strncmp(targetTriple.c_str(), "x86_64-apple-", 13) == 0) {
+ args.push_back("-arch");
+ args.push_back("x86_64");
+ }
+ else if (strncmp(targetTriple.c_str(), "powerpc-apple-", 14) == 0) {
+ args.push_back("-arch");
+ args.push_back("ppc");
+ }
+ else if (strncmp(targetTriple.c_str(), "powerpc64-apple-", 16) == 0) {
+ args.push_back("-arch");
+ args.push_back("ppc64");
+ }
+ }
+ 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(gcc, &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 ) {
+ // create target machine from info for merged modules
+ Module* mergedModule = _linker.getModule();
+ const TargetMachineRegistry::entry* march =
+ TargetMachineRegistry::getClosestStaticTargetForModule(
+ *mergedModule, errMsg);
+ if ( march == NULL )
+ return true;
+
+ // construct LTModule, hand over ownership of module and target
+ std::string FeatureStr =
+ getFeatureString(_linker.getModule()->getTargetTriple().c_str());
+ _target = march->CtorFn(*mergedModule, FeatureStr.c_str());
+ }
+ return false;
+}
+
+void LTOCodeGenerator::applyScopeRestrictions()
+{
+ if ( !_scopeRestrictionsDone ) {
+ 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() ) {
+ Mangler mangler(*mergedModule,
+ _target->getTargetAsmInfo()->getGlobalPrefix());
+ std::vector<const char*> mustPreserveList;
+ for (Module::iterator f = mergedModule->begin(),
+ e = mergedModule->end(); f != e; ++f) {
+ if ( !f->isDeclaration()
+ && _mustPreserveSymbols.count(mangler.getValueName(f)) )
+ mustPreserveList.push_back(::strdup(f->getName().c_str()));
+ }
+ for (Module::global_iterator v = mergedModule->global_begin(),
+ e = mergedModule->global_end(); v != e; ++v) {
+ if ( !v->isDeclaration()
+ && _mustPreserveSymbols.count(mangler.getValueName(v)) )
+ mustPreserveList.push_back(::strdup(v->getName().c_str()));
+ }
+ passes.add(createInternalizePass(mustPreserveList));
+ }
+ // apply scope restrictions
+ passes.run(*mergedModule);
+
+ _scopeRestrictionsDone = true;
+ }
+}
+
+/// Optimize merged modules using various IPO passes
+bool LTOCodeGenerator::generateAssemblyCode(std::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 target supports exception handling then enable it now.
+ if ( _target->getTargetAsmInfo()->doesSupportExceptionHandling() )
+ llvm::ExceptionHandling = true;
+
+ // set codegen model
+ switch( _codeModel ) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ _target->setRelocationModel(Reloc::Static);
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ _target->setRelocationModel(Reloc::PIC_);
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ _target->setRelocationModel(Reloc::DynamicNoPIC);
+ break;
+ }
+
+ // 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()));
+
+ // Propagate constants at call sites into the functions they call. This
+ // opens opportunities for globalopt (and inlining) by substituting function
+ // pointers passed as arguments to direct uses of functions.
+ passes.add(createIPSCCPPass());
+
+ // Now that we internalized some globals, see if we can hack on them!
+ passes.add(createGlobalOptimizerPass());
+
+ // Linking modules together can lead to duplicated global constants, only
+ // keep one copy of each constant...
+ passes.add(createConstantMergePass());
+
+ // Remove unused arguments from functions...
+ passes.add(createDeadArgEliminationPass());
+
+ // Reduce the code after globalopt and ipsccp. Both can open up significant
+ // simplification opportunities, and both can propagate functions through
+ // function pointers. When this happens, we often have to resolve varargs
+ // calls, etc, so let instcombine do this.
+ passes.add(createInstructionCombiningPass());
+ passes.add(createFunctionInliningPass()); // Inline small functions
+ passes.add(createPruneEHPass()); // Remove dead EH info
+ passes.add(createGlobalDCEPass()); // Remove dead functions
+
+ // If we didn't decide to inline a function, check to see if we can
+ // transform it to pass arguments by value instead of by reference.
+ passes.add(createArgumentPromotionPass());
+
+ // The IPO passes may leave cruft around. Clean up after them.
+ passes.add(createInstructionCombiningPass());
+ passes.add(createJumpThreadingPass()); // Thread jumps.
+ passes.add(createScalarReplAggregatesPass()); // Break up allocas
+
+ // Run a few AA driven optimizations here and now, to cleanup the code.
+ passes.add(createGlobalsModRefPass()); // IP alias analysis
+ passes.add(createLICMPass()); // Hoist loop invariants
+ passes.add(createGVNPass()); // Remove common subexprs
+ passes.add(createMemCpyOptPass()); // Remove dead memcpy's
+ passes.add(createDeadStoreEliminationPass()); // Nuke dead stores
+
+ // Cleanup and simplify the code after the scalar optimizations.
+ passes.add(createInstructionCombiningPass());
+ passes.add(createJumpThreadingPass()); // Thread jumps.
+ passes.add(createPromoteMemoryToRegisterPass()); // Cleanup after threading.
+
+
+ // Delete basic blocks, which optimization passes may have killed...
+ passes.add(createCFGSimplificationPass());
+
+ // Now that we have optimized the program, discard unreachable functions...
+ passes.add(createGlobalDCEPass());
+
+ // Make sure everything is still good.
+ passes.add(createVerifierPass());
+
+ FunctionPassManager* codeGenPasses =
+ new FunctionPassManager(new ExistingModuleProvider(mergedModule));
+
+ codeGenPasses->add(new TargetData(*_target->getTargetData()));
+
+ MachineCodeEmitter* mce = NULL;
+
+ switch (_target->addPassesToEmitFile(*codeGenPasses, out,
+ TargetMachine::AssemblyFile, true)) {
+ case FileModel::MachOFile:
+ mce = AddMachOWriter(*codeGenPasses, out, *_target);
+ break;
+ case FileModel::ElfFile:
+ mce = AddELFWriter(*codeGenPasses, out, *_target);
+ break;
+ case FileModel::AsmFile:
+ break;
+ case FileModel::Error:
+ case FileModel::None:
+ errMsg = "target file type not supported";
+ return true;
+ }
+
+ if (_target->addPassesToEmitFileFinish(*codeGenPasses, mce, true)) {
+ errMsg = "target does not support generation of this file type";
+ 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
+}
+
+
+
--- /dev/null
+//===-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/ADT/StringMap.h"
+
+#include <string>
+
+
+//
+// C++ class which implements the opaque lto_code_gen_t
+//
+class LTOCodeGenerator {
+public:
+ static const char* getVersionString();
+
+ LTOCodeGenerator();
+ ~LTOCodeGenerator();
+
+ bool addModule(class LTOModule*, std::string& errMsg);
+ bool setDebugInfo(lto_debug_model, std::string& errMsg);
+ bool setCodePICModel(lto_codegen_model, std::string& errMsg);
+ void addMustPreserveSymbol(const char* sym);
+ bool writeMergedModules(const char* path,
+ std::string& errMsg);
+ const void* compile(size_t* length, std::string& errMsg);
+
+private:
+ bool generateAssemblyCode(std::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::Linker _linker;
+ llvm::TargetMachine* _target;
+ bool _emitDwarfDebugInfo;
+ bool _scopeRestrictionsDone;
+ lto_codegen_model _codeModel;
+ StringSet _mustPreserveSymbols;
+ llvm::MemoryBuffer* _nativeObjectFile;
+};
+
+#endif // LTO_CODE_GENERATOR_H
+
--- /dev/null
+//===-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/Module.h"
+#include "llvm/ModuleProvider.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/System/Path.h"
+#include "llvm/System/Process.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetAsmInfo.h"
+
+#include <fstream>
+
+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 == NULL )
+ 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<ModuleProvider> mp(getBitcodeModuleProvider(buffer));
+ // on success, mp owns buffer and both are deleted at end of this method
+ if ( !mp ) {
+ delete buffer;
+ return false;
+ }
+ std::string actualTarget = mp->getModule()->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(startPtr, endPtr);
+ else
+ return MemoryBuffer::getMemBuffer(startPtr, endPtr);
+}
+
+
+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);
+}
+
+/// getFeatureString - Return a string listing the features associated with the
+/// target triple.
+///
+/// FIXME: This is an inelegant way of specifying the features of a
+/// subtarget. It would be better if we could encode this information into the
+/// IR. See <rdar://5972456>.
+std::string getFeatureString(const char *TargetTriple) {
+ SubtargetFeatures Features;
+
+ if (strncmp(TargetTriple, "powerpc-apple-", 14) == 0) {
+ Features.AddFeature("altivec", true);
+ } else if (strncmp(TargetTriple, "powerpc64-apple-", 16) == 0) {
+ Features.AddFeature("64bit", true);
+ Features.AddFeature("altivec", true);
+ }
+
+ return Features.getString();
+}
+
+LTOModule* LTOModule::makeLTOModule(MemoryBuffer* buffer, std::string& errMsg)
+{
+ // parse bitcode buffer
+ OwningPtr<Module> m(ParseBitcodeFile(buffer, &errMsg));
+ if ( !m )
+ return NULL;
+ // find machine architecture for this module
+ const TargetMachineRegistry::entry* march =
+ TargetMachineRegistry::getClosestStaticTargetForModule(*m, errMsg);
+
+ if ( march == NULL )
+ return NULL;
+
+ // construct LTModule, hand over ownership of module and target
+ std::string FeatureStr = getFeatureString(m->getTargetTriple().c_str());
+ TargetMachine* target = march->CtorFn(*m, 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);
+ }
+ }
+ }
+}
+
+void LTOModule::addDefinedDataSymbol(GlobalValue* v, Mangler &mangler)
+{
+ // add to list of defined symbols
+ addDefinedSymbol(v, mangler, false);
+
+ // 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)
+{
+ // string is owned by _defines
+ const char* symbolName = ::strdup(mangler.getValueName(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 != NULL) && 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->hasExternalLinkage() || def->hasWeakLinkage() )
+ 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::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
+{
+ const char* name = mangler.getValueName(decl).c_str();
+ // ignore all llvm.* symbols
+ if ( strncmp(name, "llvm.", 5) != 0 ) {
+ _undefines[name] = 1;
+ }
+}
+
+
+
+// Find exeternal 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.
+ Mangler mangler(*_module, _target->getTargetAsmInfo()->getGlobalPrefix());
+
+ // 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);
+ }
+
+ // make symbols for all undefines
+ for (StringSet::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->getKeyData(), it->getKeyData()+
+ it->getKeyLength()) == 0 ) {
+ NameAndAttributes info;
+ info.name = it->getKeyData();
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ _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;
+}
+
--- /dev/null
+//===-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
+//
+class LTOModule {
+public:
+
+ 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);
+ 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;
+ StringSet _undefines;
+};
+
+extern std::string getFeatureString(const char *TargetTriple);
+
+#endif // LTO_MODULE_H
+
--- /dev/null
+##===- tools/lto2/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
+
+# 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 includeing Makefile.rules
+include $(LEVEL)/Makefile.config
+
+LINK_LIBS_IN_SHARED = 1
+ifeq ($(OS),Darwin)
+ SHARED_LIBRARY = 1
+ BUILD_ARCHIVE = 0
+ DONT_BUILD_RELINKED = 1
+else
+ BUILD_ARCHIVE = 1
+endif
+
+LINK_COMPONENTS := $(TARGETS_TO_BUILD) ipo scalaropts linker bitreader bitwriter
+
+include $(LEVEL)/Makefile.common
+
+ifeq ($(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 := $(LLVMLibsOptions) \
+ -no-undefined -avoid-version \
+ -Wl,-exported_symbols_list -Wl,$(PROJ_SRC_DIR)/lto.exports \
+ -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 := $(LLVMLibsOptions) \
+ -Wl,-install_name \
+ -Wl,"@executable_path/../lib/lib$(LIBRARYNAME)$(SHLIBEXT)"
+ endif
+
+endif
--- /dev/null
+//===-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 "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()
+{
+ 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);
+}
+
+//
+// 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);
+}
+
+
+
--- /dev/null
+_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
+
+++ /dev/null
-//===-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/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Linker.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/System/Signals.h"
-#include "llvm/Analysis/Passes.h"
-#include "llvm/Analysis/LoopPass.h"
-#include "llvm/Analysis/Verifier.h"
-#include "llvm/Analysis/LoadValueNumbering.h"
-#include "llvm/CodeGen/FileWriters.h"
-#include "llvm/Target/SubtargetFeature.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetMachineRegistry.h"
-#include "llvm/Target/TargetAsmInfo.h"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/Transforms/Scalar.h"
-#include "llvm/Config/config.h"
-
-
-#include <fstream>
-#include <unistd.h>
-#include <stdlib.h>
-#include <fcntl.h>
-
-
-using namespace llvm;
-
-
-
-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()
- : _linker("LinkTimeOptimizer", "ld-temp.o"), _target(NULL),
- _emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
- _codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
- _nativeObjectFile(NULL)
-{
-
-}
-
-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::addMustPreserveSymbol(const char* sym)
-{
- _mustPreserveSymbols[sym] = 1;
-}
-
-
-bool LTOCodeGenerator::writeMergedModules(const char* path, std::string& errMsg)
-{
- if ( this->determineTarget(errMsg) )
- return true;
-
- // mark which symbols can not be internalized
- this->applyScopeRestrictions();
-
- // create output file
- std::ofstream out(path, std::ios_base::out|std::ios::trunc|std::ios::binary);
- if ( out.fail() ) {
- errMsg = "could not open bitcode file for writing: ";
- errMsg += path;
- return true;
- }
-
- // write bitcode to it
- WriteBitcodeToFile(_linker.getModule(), out);
- if ( out.fail() ) {
- 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
- std::ofstream asmFile(uniqueAsmPath.c_str());
- bool genResult = this->generateAssemblyCode(asmFile, errMsg);
- asmFile.close();
- 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.toString();
- bool asmResult = this->assemble(uniqueAsmPath.toString(),
- 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)
-{
- // find compiler driver
- const sys::Path gcc = sys::Program::FindProgramByName("gcc");
- if ( gcc.isEmpty() ) {
- errMsg = "can't locate gcc";
- return true;
- }
-
- // build argument list
- std::vector<const char*> args;
- std::string targetTriple = _linker.getModule()->getTargetTriple();
- args.push_back(gcc.c_str());
- if ( targetTriple.find("darwin") != targetTriple.size() ) {
- if (strncmp(targetTriple.c_str(), "i686-apple-", 11) == 0) {
- args.push_back("-arch");
- args.push_back("i386");
- }
- else if (strncmp(targetTriple.c_str(), "x86_64-apple-", 13) == 0) {
- args.push_back("-arch");
- args.push_back("x86_64");
- }
- else if (strncmp(targetTriple.c_str(), "powerpc-apple-", 14) == 0) {
- args.push_back("-arch");
- args.push_back("ppc");
- }
- else if (strncmp(targetTriple.c_str(), "powerpc64-apple-", 16) == 0) {
- args.push_back("-arch");
- args.push_back("ppc64");
- }
- }
- 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(gcc, &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 ) {
- // create target machine from info for merged modules
- Module* mergedModule = _linker.getModule();
- const TargetMachineRegistry::entry* march =
- TargetMachineRegistry::getClosestStaticTargetForModule(
- *mergedModule, errMsg);
- if ( march == NULL )
- return true;
-
- // construct LTModule, hand over ownership of module and target
- std::string FeatureStr =
- getFeatureString(_linker.getModule()->getTargetTriple().c_str());
- _target = march->CtorFn(*mergedModule, FeatureStr.c_str());
- }
- return false;
-}
-
-void LTOCodeGenerator::applyScopeRestrictions()
-{
- if ( !_scopeRestrictionsDone ) {
- 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() ) {
- Mangler mangler(*mergedModule,
- _target->getTargetAsmInfo()->getGlobalPrefix());
- std::vector<const char*> mustPreserveList;
- for (Module::iterator f = mergedModule->begin(),
- e = mergedModule->end(); f != e; ++f) {
- if ( !f->isDeclaration()
- && _mustPreserveSymbols.count(mangler.getValueName(f)) )
- mustPreserveList.push_back(::strdup(f->getName().c_str()));
- }
- for (Module::global_iterator v = mergedModule->global_begin(),
- e = mergedModule->global_end(); v != e; ++v) {
- if ( !v->isDeclaration()
- && _mustPreserveSymbols.count(mangler.getValueName(v)) )
- mustPreserveList.push_back(::strdup(v->getName().c_str()));
- }
- passes.add(createInternalizePass(mustPreserveList));
- }
- // apply scope restrictions
- passes.run(*mergedModule);
-
- _scopeRestrictionsDone = true;
- }
-}
-
-/// Optimize merged modules using various IPO passes
-bool LTOCodeGenerator::generateAssemblyCode(std::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 target supports exception handling then enable it now.
- if ( _target->getTargetAsmInfo()->doesSupportExceptionHandling() )
- llvm::ExceptionHandling = true;
-
- // set codegen model
- switch( _codeModel ) {
- case LTO_CODEGEN_PIC_MODEL_STATIC:
- _target->setRelocationModel(Reloc::Static);
- break;
- case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
- _target->setRelocationModel(Reloc::PIC_);
- break;
- case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
- _target->setRelocationModel(Reloc::DynamicNoPIC);
- break;
- }
-
- // 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()));
-
- // Propagate constants at call sites into the functions they call. This
- // opens opportunities for globalopt (and inlining) by substituting function
- // pointers passed as arguments to direct uses of functions.
- passes.add(createIPSCCPPass());
-
- // Now that we internalized some globals, see if we can hack on them!
- passes.add(createGlobalOptimizerPass());
-
- // Linking modules together can lead to duplicated global constants, only
- // keep one copy of each constant...
- passes.add(createConstantMergePass());
-
- // Remove unused arguments from functions...
- passes.add(createDeadArgEliminationPass());
-
- // Reduce the code after globalopt and ipsccp. Both can open up significant
- // simplification opportunities, and both can propagate functions through
- // function pointers. When this happens, we often have to resolve varargs
- // calls, etc, so let instcombine do this.
- passes.add(createInstructionCombiningPass());
- passes.add(createFunctionInliningPass()); // Inline small functions
- passes.add(createPruneEHPass()); // Remove dead EH info
- passes.add(createGlobalDCEPass()); // Remove dead functions
-
- // If we didn't decide to inline a function, check to see if we can
- // transform it to pass arguments by value instead of by reference.
- passes.add(createArgumentPromotionPass());
-
- // The IPO passes may leave cruft around. Clean up after them.
- passes.add(createInstructionCombiningPass());
- passes.add(createJumpThreadingPass()); // Thread jumps.
- passes.add(createScalarReplAggregatesPass()); // Break up allocas
-
- // Run a few AA driven optimizations here and now, to cleanup the code.
- passes.add(createGlobalsModRefPass()); // IP alias analysis
- passes.add(createLICMPass()); // Hoist loop invariants
- passes.add(createGVNPass()); // Remove common subexprs
- passes.add(createMemCpyOptPass()); // Remove dead memcpy's
- passes.add(createDeadStoreEliminationPass()); // Nuke dead stores
-
- // Cleanup and simplify the code after the scalar optimizations.
- passes.add(createInstructionCombiningPass());
- passes.add(createJumpThreadingPass()); // Thread jumps.
- passes.add(createPromoteMemoryToRegisterPass()); // Cleanup after threading.
-
-
- // Delete basic blocks, which optimization passes may have killed...
- passes.add(createCFGSimplificationPass());
-
- // Now that we have optimized the program, discard unreachable functions...
- passes.add(createGlobalDCEPass());
-
- // Make sure everything is still good.
- passes.add(createVerifierPass());
-
- FunctionPassManager* codeGenPasses =
- new FunctionPassManager(new ExistingModuleProvider(mergedModule));
-
- codeGenPasses->add(new TargetData(*_target->getTargetData()));
-
- MachineCodeEmitter* mce = NULL;
-
- switch (_target->addPassesToEmitFile(*codeGenPasses, out,
- TargetMachine::AssemblyFile, true)) {
- case FileModel::MachOFile:
- mce = AddMachOWriter(*codeGenPasses, out, *_target);
- break;
- case FileModel::ElfFile:
- mce = AddELFWriter(*codeGenPasses, out, *_target);
- break;
- case FileModel::AsmFile:
- break;
- case FileModel::Error:
- case FileModel::None:
- errMsg = "target file type not supported";
- return true;
- }
-
- if (_target->addPassesToEmitFileFinish(*codeGenPasses, mce, true)) {
- errMsg = "target does not support generation of this file type";
- 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
-}
-
-
-
+++ /dev/null
-//===-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/ADT/StringMap.h"
-
-#include <string>
-
-
-//
-// C++ class which implements the opaque lto_code_gen_t
-//
-class LTOCodeGenerator {
-public:
- static const char* getVersionString();
-
- LTOCodeGenerator();
- ~LTOCodeGenerator();
-
- bool addModule(class LTOModule*, std::string& errMsg);
- bool setDebugInfo(lto_debug_model, std::string& errMsg);
- bool setCodePICModel(lto_codegen_model, std::string& errMsg);
- void addMustPreserveSymbol(const char* sym);
- bool writeMergedModules(const char* path,
- std::string& errMsg);
- const void* compile(size_t* length, std::string& errMsg);
-
-private:
- bool generateAssemblyCode(std::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::Linker _linker;
- llvm::TargetMachine* _target;
- bool _emitDwarfDebugInfo;
- bool _scopeRestrictionsDone;
- lto_codegen_model _codeModel;
- StringSet _mustPreserveSymbols;
- llvm::MemoryBuffer* _nativeObjectFile;
-};
-
-#endif // LTO_CODE_GENERATOR_H
-
+++ /dev/null
-//===-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/Module.h"
-#include "llvm/ModuleProvider.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/System/Path.h"
-#include "llvm/System/Process.h"
-#include "llvm/Target/SubtargetFeature.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetMachineRegistry.h"
-#include "llvm/Target/TargetAsmInfo.h"
-
-#include <fstream>
-
-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 == NULL )
- 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<ModuleProvider> mp(getBitcodeModuleProvider(buffer));
- // on success, mp owns buffer and both are deleted at end of this method
- if ( !mp ) {
- delete buffer;
- return false;
- }
- std::string actualTarget = mp->getModule()->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(startPtr, endPtr);
- else
- return MemoryBuffer::getMemBuffer(startPtr, endPtr);
-}
-
-
-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);
-}
-
-/// getFeatureString - Return a string listing the features associated with the
-/// target triple.
-///
-/// FIXME: This is an inelegant way of specifying the features of a
-/// subtarget. It would be better if we could encode this information into the
-/// IR. See <rdar://5972456>.
-std::string getFeatureString(const char *TargetTriple) {
- SubtargetFeatures Features;
-
- if (strncmp(TargetTriple, "powerpc-apple-", 14) == 0) {
- Features.AddFeature("altivec", true);
- } else if (strncmp(TargetTriple, "powerpc64-apple-", 16) == 0) {
- Features.AddFeature("64bit", true);
- Features.AddFeature("altivec", true);
- }
-
- return Features.getString();
-}
-
-LTOModule* LTOModule::makeLTOModule(MemoryBuffer* buffer, std::string& errMsg)
-{
- // parse bitcode buffer
- OwningPtr<Module> m(ParseBitcodeFile(buffer, &errMsg));
- if ( !m )
- return NULL;
- // find machine architecture for this module
- const TargetMachineRegistry::entry* march =
- TargetMachineRegistry::getClosestStaticTargetForModule(*m, errMsg);
-
- if ( march == NULL )
- return NULL;
-
- // construct LTModule, hand over ownership of module and target
- std::string FeatureStr = getFeatureString(m->getTargetTriple().c_str());
- TargetMachine* target = march->CtorFn(*m, 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);
- }
- }
- }
-}
-
-void LTOModule::addDefinedDataSymbol(GlobalValue* v, Mangler &mangler)
-{
- // add to list of defined symbols
- addDefinedSymbol(v, mangler, false);
-
- // 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)
-{
- // string is owned by _defines
- const char* symbolName = ::strdup(mangler.getValueName(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 != NULL) && 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->hasExternalLinkage() || def->hasWeakLinkage() )
- 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::addPotentialUndefinedSymbol(GlobalValue* decl, Mangler &mangler)
-{
- const char* name = mangler.getValueName(decl).c_str();
- // ignore all llvm.* symbols
- if ( strncmp(name, "llvm.", 5) != 0 ) {
- _undefines[name] = 1;
- }
-}
-
-
-
-// Find exeternal 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.
- Mangler mangler(*_module, _target->getTargetAsmInfo()->getGlobalPrefix());
-
- // 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);
- }
-
- // make symbols for all undefines
- for (StringSet::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->getKeyData(), it->getKeyData()+
- it->getKeyLength()) == 0 ) {
- NameAndAttributes info;
- info.name = it->getKeyData();
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- _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;
-}
-
+++ /dev/null
-//===-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
-//
-class LTOModule {
-public:
-
- 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);
- 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;
- StringSet _undefines;
-};
-
-extern std::string getFeatureString(const char *TargetTriple);
-
-#endif // LTO_MODULE_H
-
+++ /dev/null
-##===- tools/lto2/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
-
-# 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 includeing Makefile.rules
-include $(LEVEL)/Makefile.config
-
-LINK_LIBS_IN_SHARED = 1
-ifeq ($(OS),Darwin)
- SHARED_LIBRARY = 1
- BUILD_ARCHIVE = 0
- DONT_BUILD_RELINKED = 1
-else
- BUILD_ARCHIVE = 1
-endif
-
-LINK_COMPONENTS := $(TARGETS_TO_BUILD) ipo scalaropts linker bitreader bitwriter
-
-include $(LEVEL)/Makefile.common
-
-ifeq ($(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 := $(LLVMLibsOptions) \
- -no-undefined -avoid-version \
- -Wl,-exported_symbols_list -Wl,$(PROJ_SRC_DIR)/lto.exports \
- -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 := $(LLVMLibsOptions) \
- -Wl,-install_name \
- -Wl,"@executable_path/../lib/lib$(LIBRARYNAME)$(SHLIBEXT)"
- endif
-
-endif
+++ /dev/null
-//===-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 "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()
-{
- 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);
-}
-
-//
-// 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);
-}
-
-
-
+++ /dev/null
-_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
-
projects / oota-llvm.git / commitdiff