#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/Linker.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.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/PassManager.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/Verifier.h"
-#include "llvm/Analysis/LoadValueNumbering.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/CodeGen/FileWriters.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/StandardPasses.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/System/Host.h"
+#include "llvm/System/Signals.h"
#include "llvm/Target/SubtargetFeature.h"
#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetAsmInfo.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/Config/config.h"
+#include <cstdlib>
#include <fstream>
#include <unistd.h>
-#include <stdlib.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()
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)
{
sys::RemoveFileOnSignal(uniqueAsmPath);
// generate assembly code
- std::ofstream asmFile(uniqueAsmPath.c_str());
- bool genResult = this->generateAssemblyCode(asmFile, errMsg);
- asmFile.close();
+ bool genResult = false;
+ {
+ raw_fd_ostream asmFD(raw_fd_ostream(uniqueAsmPath.c_str(),
+ /*Binary=*/false, /*Force=*/true,
+ errMsg));
+ formatted_raw_ostream asmFile(asmFD);
+ if (!errMsg.empty())
+ return NULL;
+ genResult = this->generateAssemblyCode(asmFile, errMsg);
+ }
if ( genResult ) {
if ( uniqueAsmPath.exists() )
uniqueAsmPath.eraseFromDisk();
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(), "i686-apple-", 11) == 0) {
+ args.push_back(tool.c_str());
+ if ( targetTriple.find("darwin") != std::string::npos ) {
+ // darwin specific command line options
+ if (strncmp(targetTriple.c_str(), "i386-apple-", 11) == 0) {
args.push_back("-arch");
args.push_back("i386");
}
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)) {
+ args.push_back("-arch");
+ args.push_back("armv6");
+ }
+ else if ((strncmp(targetTriple.c_str(), "armv7-apple-", 12) == 0) ||
+ (strncmp(targetTriple.c_str(), "thumbv7-apple-", 14) == 0)) {
+ args.push_back("-arch");
+ args.push_back("armv7");
+ }
+ // 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());
+ std::string FeatureStr = getFeatureString(Triple.c_str());
+ _target = march->createTargetMachine(Triple, FeatureStr);
}
return false;
}
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()));
+ && _mustPreserveSymbols.count(mangler.getMangledName(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.getValueName(v)) )
- mustPreserveList.push_back(::strdup(v->getName().c_str()));
+ && _mustPreserveSymbols.count(mangler.getMangledName(v)) )
+ mustPreserveList.push_back(::strdup(v->getNameStr().c_str()));
}
passes.add(createInternalizePass(mustPreserveList));
}
}
/// Optimize merged modules using various IPO passes
-bool LTOCodeGenerator::generateAssemblyCode(std::ostream& out, std::string& errMsg)
+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
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 options were requested, set them
+ if ( !_codegenOptions.empty() )
+ cl::ParseCommandLineOptions(_codegenOptions.size(),
+ (char**)&_codegenOptions[0]);
// Instantiate the pass manager to organize the passes.
PassManager passes;
// 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());
+ createStandardLTOPasses(&passes, /*Internalize=*/ false, !DisableInline,
+ /*VerifyEach=*/ false);
// Make sure everything is still good.
passes.add(createVerifierPass());
codeGenPasses->add(new TargetData(*_target->getTargetData()));
- MachineCodeEmitter* mce = NULL;
+ ObjectCodeEmitter* oce = NULL;
switch (_target->addPassesToEmitFile(*codeGenPasses, out,
- TargetMachine::AssemblyFile, true)) {
+ TargetMachine::AssemblyFile,
+ CodeGenOpt::Aggressive)) {
case FileModel::MachOFile:
- mce = AddMachOWriter(*codeGenPasses, out, *_target);
+ oce = AddMachOWriter(*codeGenPasses, out, *_target);
break;
case FileModel::ElfFile:
- mce = AddELFWriter(*codeGenPasses, out, *_target);
+ oce = AddELFWriter(*codeGenPasses, out, *_target);
break;
case FileModel::AsmFile:
break;
return true;
}
- if (_target->addPassesToEmitFileFinish(*codeGenPasses, mce, true)) {
+ if (_target->addPassesToEmitFileFinish(*codeGenPasses, oce,
+ CodeGenOpt::Aggressive)) {
errMsg = "target does not support generation of this file type";
return true;
}
codeGenPasses->run(*it);
codeGenPasses->doFinalization();
+
+ out.flush();
+
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)) {
+ // 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()));
+ }
+}
projects / oota-llvm.git / blobdiff