#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/CommandLine.h"
-#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Signals.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/Analysis/LoopPass.h"
#include "llvm/Analysis/Verifier.h"
-#include "llvm/CodeGen/FileWriters.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/TargetMachineRegistry.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Target/TargetSelect.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Transforms/Scalar.h"
-#include "llvm/ADT/StringExtras.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 <fstream>
+#include <cstdlib>
#include <unistd.h>
-#include <stdlib.h>
#include <fcntl.h>
LTOCodeGenerator::LTOCodeGenerator()
- : _linker("LinkTimeOptimizer", "ld-temp.o"), _target(NULL),
+ : _context(getGlobalContext()),
+ _linker("LinkTimeOptimizer", "ld-temp.o", _context), _target(NULL),
_emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
_codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
- _nativeObjectFile(NULL)
+ _nativeObjectFile(NULL), _assemblerPath(NULL)
{
-
+ InitializeAllTargets();
+ InitializeAllAsmPrinters();
}
LTOCodeGenerator::~LTOCodeGenerator()
bool LTOCodeGenerator::setCodePICModel(lto_codegen_model model,
- std::string& errMsg)
+ std::string& errMsg)
{
switch (model) {
case LTO_CODEGEN_PIC_MODEL_STATIC:
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 ( this->determineTarget(errMsg) )
- return true;
+bool LTOCodeGenerator::writeMergedModules(const char *path,
+ std::string &errMsg) {
+ if (determineTarget(errMsg))
+ return true;
- // mark which symbols can not be internalized
- this->applyScopeRestrictions();
+ // mark which symbols can not be internalized
+ 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;
- }
+ // 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;
+ }
- return false;
+ // write bitcode to it
+ WriteBitcodeToFile(_linker.getModule(), Out);
+
+ if (Out.has_error()) {
+ errMsg = "could not write bitcode file: ";
+ errMsg += path;
+ return true;
+ }
+
+ return false;
}
// generate assembly code
bool genResult = false;
{
- raw_fd_ostream asmFile(uniqueAsmPath.c_str(), false, errMsg);
+ raw_fd_ostream asmFD(uniqueAsmPath.c_str(), errMsg);
+ formatted_raw_ostream asmFile(asmFD);
if (!errMsg.empty())
return NULL;
genResult = this->generateAssemblyCode(asmFile, errMsg);
sys::RemoveFileOnSignal(uniqueObjPath);
// assemble the assembly code
- const std::string& uniqueObjStr = uniqueObjPath.toString();
- bool asmResult = this->assemble(uniqueAsmPath.toString(),
- uniqueObjStr, errMsg);
+ 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;
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;
+ 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;
- std::string targetTriple = _linker.getModule()->getTargetTriple();
- args.push_back(gcc.c_str());
- if ( targetTriple.find("darwin") != targetTriple.size() ) {
- if (strncmp(targetTriple.c_str(), "i386-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");
- }
- else if (strncmp(targetTriple.c_str(), "arm-apple-", 10) == 0) {
- args.push_back("-arch");
- args.push_back("arm");
- }
- else if ((strncmp(targetTriple.c_str(), "armv4t-apple-", 13) == 0) ||
- (strncmp(targetTriple.c_str(), "thumbv4t-apple-", 15) == 0)) {
- args.push_back("-arch");
- args.push_back("armv4t");
- }
- else if ((strncmp(targetTriple.c_str(), "armv5-apple-", 12) == 0) ||
- (strncmp(targetTriple.c_str(), "armv5e-apple-", 13) == 0) ||
- (strncmp(targetTriple.c_str(), "thumbv5-apple-", 14) == 0) ||
- (strncmp(targetTriple.c_str(), "thumbv5e-apple-", 15) == 0)) {
- args.push_back("-arch");
- args.push_back("armv5");
- }
- else if ((strncmp(targetTriple.c_str(), "armv6-apple-", 12) == 0) ||
- (strncmp(targetTriple.c_str(), "thumbv6-apple-", 14) == 0)) {
+ 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("armv6");
+ 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("-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) ) {
+ if ( sys::Program::ExecuteAndWait(tool, &args[0], 0, 0, 0, 0, &errMsg) ) {
errMsg = "error in assembly";
return true;
}
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
- Module* mergedModule = _linker.getModule();
- const TargetMachineRegistry::entry* march =
- TargetMachineRegistry::getClosestStaticTargetForModule(
- *mergedModule, errMsg);
+ 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
- std::string FeatureStr =
- getFeatureString(_linker.getModule()->getTargetTriple().c_str());
- _target = march->CtorFn(*mergedModule, FeatureStr.c_str());
+ const std::string FeatureStr =
+ SubtargetFeatures::getDefaultSubtargetFeatures(llvm::Triple(Triple));
+ _target = march->createTargetMachine(Triple, FeatureStr);
}
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;
+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(raw_ostream& out,
+bool LTOCodeGenerator::generateAssemblyCode(formatted_raw_ostream& out,
std::string& errMsg)
{
- if ( this->determineTarget(errMsg) )
+ if ( this->determineTarget(errMsg) )
return true;
// mark which symbols can not be internalized
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;
+ // If target supports exception handling then enable it now.
+ switch (_target->getMCAsmInfo()->getExceptionHandlingType()) {
+ case ExceptionHandling::Dwarf:
+ llvm::DwarfExceptionHandling = true;
+ break;
+ case ExceptionHandling::SjLj:
+ llvm::SjLjExceptionHandling = true;
+ break;
+ case ExceptionHandling::None:
+ break;
+ default:
+ assert (0 && "Unknown exception handling model!");
}
// if options were requested, set them
// 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());
- if (!DisableInline)
- 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(createFunctionAttrsPass()); // Add nocapture
- 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());
+ createStandardLTOPasses(&passes, /*Internalize=*/ false, !DisableInline,
+ /*VerifyEach=*/ false);
// Make sure everything is still good.
passes.add(createVerifierPass());
- FunctionPassManager* codeGenPasses =
- new FunctionPassManager(new ExistingModuleProvider(mergedModule));
+ FunctionPassManager* codeGenPasses = new FunctionPassManager(mergedModule);
codeGenPasses->add(new TargetData(*_target->getTargetData()));
- MachineCodeEmitter* mce = NULL;
-
- switch (_target->addPassesToEmitFile(*codeGenPasses, out,
- TargetMachine::AssemblyFile, false)) {
- 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, false)) {
- errMsg = "target does not support generation of this file type";
- return true;
+ 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.
codeGenPasses->run(*it);
codeGenPasses->doFinalization();
+
return false; // success
}
/// Optimize merged modules using various IPO passes
void LTOCodeGenerator::setCodeGenDebugOptions(const char* options)
{
- std::string ops(options);
- for (std::string o = getToken(ops); !o.empty(); o = getToken(ops)) {
+ 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.c_str()));
+ _codegenOptions.push_back(strdup(o.first.str().c_str()));
}
}
projects / oota-llvm.git / blobdiff