#include "LTOCodeGenerator.h"
#include "LTOModule.h"
-#include "llvm/Constants.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/Linker.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Config/config.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/Linker.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/SubtargetFeature.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/Host.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/system_error.h"
-#include "llvm/ADT/StringExtras.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/Transforms/ObjCARC.h"
using namespace llvm;
-static cl::opt<bool> EnableInternalizing("enable-internalizing", cl::init(false),
- cl::desc("Internalize functions during LTO"));
+static cl::opt<bool>
+DisableOpt("disable-opt", cl::init(false),
+ cl::desc("Do not run any optimization passes"));
-static cl::opt<bool> DisableInline("disable-inlining", cl::init(false),
+static cl::opt<bool>
+DisableInline("disable-inlining", cl::init(false),
cl::desc("Do not run the inliner pass"));
-static cl::opt<bool> DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
+static cl::opt<bool>
+DisableGVNLoadPRE("disable-gvn-loadpre", cl::init(false),
cl::desc("Do not run the GVN load PRE pass"));
const char* LTOCodeGenerator::getVersionString() {
}
LTOCodeGenerator::LTOCodeGenerator()
- : _context(getGlobalContext()),
- _linker("LinkTimeOptimizer", "ld-temp.o", _context), _target(NULL),
- _emitDwarfDebugInfo(false), _scopeRestrictionsDone(false),
- _runInternalizePass(false), _codeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC),
- _nativeObjectFile(NULL) {
+ : Context(getGlobalContext()), Linker(new Module("ld-temp.o", Context)),
+ TargetMach(NULL), EmitDwarfDebugInfo(false), ScopeRestrictionsDone(false),
+ CodeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC), NativeObjectFile(NULL) {
InitializeAllTargets();
InitializeAllTargetMCs();
InitializeAllAsmPrinters();
+ initializeLTOPasses();
}
LTOCodeGenerator::~LTOCodeGenerator() {
- delete _target;
- delete _nativeObjectFile;
+ delete TargetMach;
+ delete NativeObjectFile;
+ delete Linker.getModule();
- for (std::vector<char*>::iterator I = _codegenOptions.begin(),
- E = _codegenOptions.end(); I != E; ++I)
+ for (std::vector<char *>::iterator I = CodegenOptions.begin(),
+ E = CodegenOptions.end();
+ I != E; ++I)
free(*I);
}
+// Initialize LTO passes. Please keep this funciton in sync with
+// PassManagerBuilder::populateLTOPassManager(), and make sure all LTO
+// passes are initialized.
+//
+void LTOCodeGenerator::initializeLTOPasses() {
+ PassRegistry &R = *PassRegistry::getPassRegistry();
+
+ initializeInternalizePassPass(R);
+ initializeIPSCCPPass(R);
+ initializeGlobalOptPass(R);
+ initializeConstantMergePass(R);
+ initializeDAHPass(R);
+ initializeInstCombinerPass(R);
+ initializeSimpleInlinerPass(R);
+ initializePruneEHPass(R);
+ initializeGlobalDCEPass(R);
+ initializeArgPromotionPass(R);
+ initializeJumpThreadingPass(R);
+ initializeSROAPass(R);
+ initializeSROA_DTPass(R);
+ initializeSROA_SSAUpPass(R);
+ initializeFunctionAttrsPass(R);
+ initializeGlobalsModRefPass(R);
+ initializeLICMPass(R);
+ initializeGVNPass(R);
+ initializeMemCpyOptPass(R);
+ initializeDCEPass(R);
+ initializeCFGSimplifyPassPass(R);
+}
+
bool LTOCodeGenerator::addModule(LTOModule* mod, std::string& errMsg) {
- bool ret = _linker.LinkInModule(mod->getLLVVMModule(), &errMsg);
+ bool ret = Linker.linkInModule(mod->getLLVVMModule(), &errMsg);
const std::vector<const char*> &undefs = mod->getAsmUndefinedRefs();
for (int i = 0, e = undefs.size(); i != e; ++i)
- _asmUndefinedRefs[undefs[i]] = 1;
+ AsmUndefinedRefs[undefs[i]] = 1;
- return ret;
+ return !ret;
}
-bool LTOCodeGenerator::setDebugInfo(lto_debug_model debug,
- std::string& errMsg) {
+void LTOCodeGenerator::setDebugInfo(lto_debug_model debug) {
switch (debug) {
case LTO_DEBUG_MODEL_NONE:
- _emitDwarfDebugInfo = false;
- return false;
+ EmitDwarfDebugInfo = false;
+ return;
case LTO_DEBUG_MODEL_DWARF:
- _emitDwarfDebugInfo = true;
- return false;
+ EmitDwarfDebugInfo = true;
+ return;
}
llvm_unreachable("Unknown debug format!");
}
-bool LTOCodeGenerator::setCodePICModel(lto_codegen_model model,
- std::string& errMsg) {
+void LTOCodeGenerator::setCodePICModel(lto_codegen_model model) {
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;
+ CodeModel = model;
+ return;
}
llvm_unreachable("Unknown PIC model!");
}
bool LTOCodeGenerator::writeMergedModules(const char *path,
std::string &errMsg) {
- if (determineTarget(errMsg))
- return true;
+ if (!determineTarget(errMsg))
+ return false;
// mark which symbols can not be internalized
applyScopeRestrictions();
// create output file
std::string ErrInfo;
- tool_output_file Out(path, ErrInfo,
- raw_fd_ostream::F_Binary);
+ tool_output_file Out(path, ErrInfo, sys::fs::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.os());
+ WriteBitcodeToFile(Linker.getModule(), Out.os());
Out.os().close();
if (Out.os().has_error()) {
errMsg = "could not write bitcode file: ";
errMsg += path;
Out.os().clear_error();
- return true;
+ return false;
}
Out.keep();
- return false;
+ return true;
}
bool LTOCodeGenerator::compile_to_file(const char** name, std::string& errMsg) {
// make unique temp .o file to put generated object file
- sys::PathWithStatus uniqueObjPath("lto-llvm.o");
- if ( uniqueObjPath.createTemporaryFileOnDisk(false, &errMsg) ) {
- uniqueObjPath.eraseFromDisk();
- return true;
+ SmallString<128> Filename;
+ int FD;
+ error_code EC = sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
+ if (EC) {
+ errMsg = EC.message();
+ return false;
}
- sys::RemoveFileOnSignal(uniqueObjPath);
// generate object file
- bool genResult = false;
- tool_output_file objFile(uniqueObjPath.c_str(), errMsg);
- if (!errMsg.empty())
- return true;
+ tool_output_file objFile(Filename.c_str(), FD);
- genResult = this->generateObjectFile(objFile.os(), errMsg);
+ bool genResult = generateObjectFile(objFile.os(), errMsg);
objFile.os().close();
if (objFile.os().has_error()) {
objFile.os().clear_error();
- return true;
+ sys::fs::remove(Twine(Filename));
+ return false;
}
objFile.keep();
- if ( genResult ) {
- uniqueObjPath.eraseFromDisk();
- return true;
+ if (!genResult) {
+ sys::fs::remove(Twine(Filename));
+ return false;
}
- _nativeObjectPath = uniqueObjPath.str();
- *name = _nativeObjectPath.c_str();
- return false;
+ NativeObjectPath = Filename.c_str();
+ *name = NativeObjectPath.c_str();
+ return true;
}
const void* LTOCodeGenerator::compile(size_t* length, std::string& errMsg) {
const char *name;
- if (compile_to_file(&name, errMsg))
+ if (!compile_to_file(&name, errMsg))
return NULL;
// remove old buffer if compile() called twice
- delete _nativeObjectFile;
+ delete NativeObjectFile;
// read .o file into memory buffer
OwningPtr<MemoryBuffer> BuffPtr;
if (error_code ec = MemoryBuffer::getFile(name, BuffPtr, -1, false)) {
errMsg = ec.message();
+ sys::fs::remove(NativeObjectPath);
return NULL;
}
- _nativeObjectFile = BuffPtr.take();
+ NativeObjectFile = BuffPtr.take();
// remove temp files
- sys::Path(_nativeObjectPath).eraseFromDisk();
+ sys::fs::remove(NativeObjectPath);
// return buffer, unless error
- if ( _nativeObjectFile == NULL )
+ if (NativeObjectFile == NULL)
return NULL;
- *length = _nativeObjectFile->getBufferSize();
- return _nativeObjectFile->getBufferStart();
+ *length = NativeObjectFile->getBufferSize();
+ return NativeObjectFile->getBufferStart();
}
-bool LTOCodeGenerator::determineTarget(std::string& errMsg) {
- if ( _target == NULL ) {
- std::string Triple = _linker.getModule()->getTargetTriple();
- if (Triple.empty())
- Triple = sys::getDefaultTargetTriple();
-
- // create target machine from info for merged modules
- const Target *march = TargetRegistry::lookupTarget(Triple, errMsg);
- if ( march == NULL )
- return true;
-
- // The relocation model is actually a static member of TargetMachine and
- // needs to be set before the TargetMachine is instantiated.
- Reloc::Model RelocModel = Reloc::Default;
- switch( _codeModel ) {
- case LTO_CODEGEN_PIC_MODEL_STATIC:
- RelocModel = Reloc::Static;
- break;
- case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
- RelocModel = Reloc::PIC_;
- break;
- case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
- RelocModel = Reloc::DynamicNoPIC;
- break;
- }
+bool LTOCodeGenerator::determineTarget(std::string &errMsg) {
+ if (TargetMach != NULL)
+ return true;
+
+ // if options were requested, set them
+ if (!CodegenOptions.empty())
+ cl::ParseCommandLineOptions(CodegenOptions.size(),
+ const_cast<char **>(&CodegenOptions[0]));
+
+ std::string TripleStr = Linker.getModule()->getTargetTriple();
+ if (TripleStr.empty())
+ TripleStr = sys::getDefaultTargetTriple();
+ llvm::Triple Triple(TripleStr);
+
+ // create target machine from info for merged modules
+ const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg);
+ if (march == NULL)
+ return false;
+
+ // The relocation model is actually a static member of TargetMachine and
+ // needs to be set before the TargetMachine is instantiated.
+ Reloc::Model RelocModel = Reloc::Default;
+ switch (CodeModel) {
+ case LTO_CODEGEN_PIC_MODEL_STATIC:
+ RelocModel = Reloc::Static;
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC:
+ RelocModel = Reloc::PIC_;
+ break;
+ case LTO_CODEGEN_PIC_MODEL_DYNAMIC_NO_PIC:
+ RelocModel = Reloc::DynamicNoPIC;
+ break;
+ }
- // construct LTOModule, hand over ownership of module and target
- SubtargetFeatures Features;
- Features.getDefaultSubtargetFeatures(llvm::Triple(Triple));
- std::string FeatureStr = Features.getString();
- TargetOptions Options;
- _target = march->createTargetMachine(Triple, _mCpu, FeatureStr, Options,
- RelocModel);
+ // construct LTOModule, hand over ownership of module and target
+ SubtargetFeatures Features;
+ Features.getDefaultSubtargetFeatures(Triple);
+ std::string FeatureStr = Features.getString();
+ // Set a default CPU for Darwin triples.
+ if (MCpu.empty() && Triple.isOSDarwin()) {
+ if (Triple.getArch() == llvm::Triple::x86_64)
+ MCpu = "core2";
+ else if (Triple.getArch() == llvm::Triple::x86)
+ MCpu = "yonah";
}
- return false;
+ TargetOptions Options;
+ LTOModule::getTargetOptions(Options);
+ TargetMach = march->createTargetMachine(TripleStr, MCpu, FeatureStr, Options,
+ RelocModel, CodeModel::Default,
+ CodeGenOpt::Aggressive);
+ return true;
}
void LTOCodeGenerator::
applyRestriction(GlobalValue &GV,
- std::vector<const char*> &mustPreserveList,
- SmallPtrSet<GlobalValue*, 8> &asmUsed,
- Mangler &mangler) {
+ std::vector<const char*> &MustPreserveList,
+ SmallPtrSet<GlobalValue*, 8> &AsmUsed,
+ Mangler &Mangler) {
SmallString<64> Buffer;
- mangler.getNameWithPrefix(Buffer, &GV, false);
+ Mangler.getNameWithPrefix(Buffer, &GV, false);
if (GV.isDeclaration())
return;
- if (_mustPreserveSymbols.count(Buffer))
- mustPreserveList.push_back(GV.getName().data());
- if (_asmUndefinedRefs.count(Buffer))
- asmUsed.insert(&GV);
+ if (MustPreserveSymbols.count(Buffer))
+ MustPreserveList.push_back(GV.getName().data());
+ if (AsmUndefinedRefs.count(Buffer))
+ AsmUsed.insert(&GV);
}
static void findUsedValues(GlobalVariable *LLVMUsed,
SmallPtrSet<GlobalValue*, 8> &UsedValues) {
if (LLVMUsed == 0) return;
- ConstantArray *Inits = dyn_cast<ConstantArray>(LLVMUsed->getInitializer());
- if (Inits == 0) return;
-
+ ConstantArray *Inits = cast<ConstantArray>(LLVMUsed->getInitializer());
for (unsigned i = 0, e = Inits->getNumOperands(); i != e; ++i)
if (GlobalValue *GV =
dyn_cast<GlobalValue>(Inits->getOperand(i)->stripPointerCasts()))
}
void LTOCodeGenerator::applyScopeRestrictions() {
- // Internalize only if specifically asked for. Otherwise, global symbols which
- // exist in the final image, but which are used outside of that image
- // (e.g. bundling) may be removed. This also happens when a function is used
- // only in inline asm. LLVM doesn't recognize that as a "use", so it could be
- // stripped.
- if (!EnableInternalizing)
+ if (ScopeRestrictionsDone)
return;
-
- if (_scopeRestrictionsDone) return;
- Module *mergedModule = _linker.getModule();
+ Module *mergedModule = Linker.getModule();
// Start off with a verification pass.
PassManager passes;
passes.add(createVerifierPass());
// mark which symbols can not be internalized
- MCContext Context(*_target->getMCAsmInfo(), *_target->getRegisterInfo(),NULL);
- Mangler mangler(Context, *_target->getTargetData());
- std::vector<const char*> mustPreserveList;
- SmallPtrSet<GlobalValue*, 8> asmUsed;
+ MCContext MContext(TargetMach->getMCAsmInfo(), TargetMach->getRegisterInfo(),
+ NULL);
+ Mangler Mangler(MContext, TargetMach);
+ std::vector<const char*> MustPreserveList;
+ SmallPtrSet<GlobalValue*, 8> AsmUsed;
for (Module::iterator f = mergedModule->begin(),
e = mergedModule->end(); f != e; ++f)
- applyRestriction(*f, mustPreserveList, asmUsed, mangler);
+ applyRestriction(*f, MustPreserveList, AsmUsed, Mangler);
for (Module::global_iterator v = mergedModule->global_begin(),
e = mergedModule->global_end(); v != e; ++v)
- applyRestriction(*v, mustPreserveList, asmUsed, mangler);
+ applyRestriction(*v, MustPreserveList, AsmUsed, Mangler);
for (Module::alias_iterator a = mergedModule->alias_begin(),
e = mergedModule->alias_end(); a != e; ++a)
- applyRestriction(*a, mustPreserveList, asmUsed, mangler);
+ applyRestriction(*a, MustPreserveList, AsmUsed, Mangler);
GlobalVariable *LLVMCompilerUsed =
mergedModule->getGlobalVariable("llvm.compiler.used");
- findUsedValues(LLVMCompilerUsed, asmUsed);
+ findUsedValues(LLVMCompilerUsed, AsmUsed);
if (LLVMCompilerUsed)
LLVMCompilerUsed->eraseFromParent();
- llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(_context);
- std::vector<Constant*> asmUsed2;
- for (SmallPtrSet<GlobalValue*, 16>::const_iterator i = asmUsed.begin(),
- e = asmUsed.end(); i !=e; ++i) {
- GlobalValue *GV = *i;
- Constant *c = ConstantExpr::getBitCast(GV, i8PTy);
- asmUsed2.push_back(c);
- }
+ if (!AsmUsed.empty()) {
+ llvm::Type *i8PTy = llvm::Type::getInt8PtrTy(Context);
+ std::vector<Constant*> asmUsed2;
+ for (SmallPtrSet<GlobalValue*, 16>::const_iterator i = AsmUsed.begin(),
+ e = AsmUsed.end(); i !=e; ++i) {
+ GlobalValue *GV = *i;
+ Constant *c = ConstantExpr::getBitCast(GV, i8PTy);
+ asmUsed2.push_back(c);
+ }
- llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, asmUsed2.size());
- LLVMCompilerUsed =
- new llvm::GlobalVariable(*mergedModule, ATy, false,
- llvm::GlobalValue::AppendingLinkage,
- llvm::ConstantArray::get(ATy, asmUsed2),
- "llvm.compiler.used");
+ llvm::ArrayType *ATy = llvm::ArrayType::get(i8PTy, asmUsed2.size());
+ LLVMCompilerUsed =
+ new llvm::GlobalVariable(*mergedModule, ATy, false,
+ llvm::GlobalValue::AppendingLinkage,
+ llvm::ConstantArray::get(ATy, asmUsed2),
+ "llvm.compiler.used");
- LLVMCompilerUsed->setSection("llvm.metadata");
+ LLVMCompilerUsed->setSection("llvm.metadata");
+ }
- passes.add(createInternalizePass(mustPreserveList));
+ passes.add(createInternalizePass(MustPreserveList));
// apply scope restrictions
passes.run(*mergedModule);
- _scopeRestrictionsDone = true;
+ ScopeRestrictionsDone = true;
}
/// Optimize merged modules using various IPO passes
bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
std::string &errMsg) {
- if ( this->determineTarget(errMsg) )
- return true;
-
- // mark which symbols can not be internalized
- this->applyScopeRestrictions();
+ if (!this->determineTarget(errMsg))
+ return false;
- Module* mergedModule = _linker.getModule();
+ Module *mergedModule = Linker.getModule();
- // if options were requested, set them
- if ( !_codegenOptions.empty() )
- cl::ParseCommandLineOptions(_codegenOptions.size(),
- const_cast<char **>(&_codegenOptions[0]));
+ // Mark which symbols can not be internalized
+ this->applyScopeRestrictions();
// 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()));
+ // Add an appropriate DataLayout instance for this module...
+ passes.add(new DataLayout(*TargetMach->getDataLayout()));
+ TargetMach->addAnalysisPasses(passes);
- PassManagerBuilder().populateLTOPassManager(passes,
- _runInternalizePass,
+ // Enabling internalize here would use its AllButMain variant. It
+ // keeps only main if it exists and does nothing for libraries. Instead
+ // we create the pass ourselves with the symbol list provided by the linker.
+ if (!DisableOpt)
+ PassManagerBuilder().populateLTOPassManager(passes,
+ /*Internalize=*/false,
!DisableInline,
DisableGVNLoadPRE);
// Make sure everything is still good.
passes.add(createVerifierPass());
- FunctionPassManager *codeGenPasses = new FunctionPassManager(mergedModule);
+ PassManager codeGenPasses;
- codeGenPasses->add(new TargetData(*_target->getTargetData()));
+ codeGenPasses.add(new DataLayout(*TargetMach->getDataLayout()));
+ TargetMach->addAnalysisPasses(codeGenPasses);
formatted_raw_ostream Out(out);
- if (_target->addPassesToEmitFile(*codeGenPasses, Out,
- TargetMachine::CGFT_ObjectFile,
- CodeGenOpt::Aggressive)) {
+ // If the bitcode files contain ARC code and were compiled with optimization,
+ // the ObjCARCContractPass must be run, so do it unconditionally here.
+ codeGenPasses.add(createObjCARCContractPass());
+
+ if (TargetMach->addPassesToEmitFile(codeGenPasses, Out,
+ TargetMachine::CGFT_ObjectFile)) {
errMsg = "target file type not supported";
- return true;
+ return false;
}
// 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();
- delete codeGenPasses;
+ codeGenPasses.run(*mergedModule);
- return false; // success
+ return true;
}
/// setCodeGenDebugOptions - Set codegen debugging options to aid in debugging
!o.first.empty(); o = getToken(o.second)) {
// ParseCommandLineOptions() expects argv[0] to be program name. Lazily add
// that.
- if ( _codegenOptions.empty() )
- _codegenOptions.push_back(strdup("libLTO"));
- _codegenOptions.push_back(strdup(o.first.str().c_str()));
+ if (CodegenOptions.empty())
+ CodegenOptions.push_back(strdup("libLTO"));
+ CodegenOptions.push_back(strdup(o.first.str().c_str()));
}
}
projects / oota-llvm.git / blobdiff