--- /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.
+//
+// LTO compilation consists of three phases: Pre-IPO, IPO and Post-IPO.
+//
+// The Pre-IPO phase compiles source code into bitcode file. The resulting
+// bitcode files, along with object files and libraries, will be fed to the
+// linker to through the IPO and Post-IPO phases. By using obj-file extension,
+// the resulting bitcode file disguises itself as an object file, and therefore
+// obviates the need of writing a special set of the make-rules only for LTO
+// compilation.
+//
+// The IPO phase perform inter-procedural analyses and optimizations, and
+// the Post-IPO consists two sub-phases: intra-procedural scalar optimizations
+// (SOPT), and intra-procedural target-dependent code generator (CG).
+//
+// As of this writing, we don't separate IPO and the Post-IPO SOPT. They
+// are intermingled together, and are driven by a single pass manager (see
+// PassManagerBuilder::populateLTOPassManager()).
+//
+// The "LTOCodeGenerator" is the driver for the IPO and Post-IPO stages.
+// The "CodeGenerator" here is bit confusing. Don't confuse the "CodeGenerator"
+// with the machine specific code generator.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LTO_CODE_GENERATOR_H
+#define LTO_CODE_GENERATOR_H
+
+#include "llvm-c/lto.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Linker.h"
+#include <string>
+#include <vector>
+
+namespace llvm {
+ class LLVMContext;
+ class GlobalValue;
+ class Mangler;
+ class MemoryBuffer;
+ class TargetMachine;
+ class raw_ostream;
+}
+
+//===----------------------------------------------------------------------===//
+/// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t
+/// type.
+///
+struct LTOCodeGenerator {
+ static const char *getVersionString();
+
+ LTOCodeGenerator();
+ ~LTOCodeGenerator();
+
+ // Merge given module, return true on success.
+ bool addModule(struct LTOModule*, std::string &errMsg);
+
+ void setDebugInfo(lto_debug_model);
+ void setCodePICModel(lto_codegen_model);
+
+ void setCpu(const char *mCpu) { MCpu = mCpu; }
+
+ void addMustPreserveSymbol(const char *sym) { MustPreserveSymbols[sym] = 1; }
+
+ // To pass options to the driver and optimization passes. These options are
+ // not necessarily for debugging purpose (The function name is misleading).
+ // This function should be called before LTOCodeGenerator::compilexxx(),
+ // and LTOCodeGenerator::writeMergedModules().
+ //
+ void setCodeGenDebugOptions(const char *opts);
+
+ // Write the merged module to the file specified by the given path.
+ // Return true on success.
+ bool writeMergedModules(const char *path, std::string &errMsg);
+
+ // Compile the merged module into a *single* object file; the path to object
+ // file is returned to the caller via argument "name". Return true on
+ // success.
+ //
+ // NOTE that it is up to the linker to remove the intermediate object file.
+ // Do not try to remove the object file in LTOCodeGenerator's destructor
+ // as we don't who (LTOCodeGenerator or the obj file) will last longer.
+ //
+ bool compile_to_file(const char **name, std::string &errMsg);
+
+ // As with compile_to_file(), this function compiles the merged module into
+ // single object file. Instead of returning the object-file-path to the caller
+ // (linker), it brings the object to a buffer, and return the buffer to the
+ // caller. This function should delete intermediate object file once its content
+ // is brought to memory. Return NULL if the compilation was not successful.
+ //
+ const void *compile(size_t *length, std::string &errMsg);
+
+private:
+ void initializeLTOPasses();
+
+ bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg);
+ void applyScopeRestrictions();
+ void applyRestriction(llvm::GlobalValue &GV,
+ std::vector<const char*> &MustPreserveList,
+ llvm::SmallPtrSet<llvm::GlobalValue*, 8> &AsmUsed,
+ llvm::Mangler &Mangler);
+ bool determineTarget(std::string &errMsg);
+
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ llvm::LLVMContext &Context;
+ llvm::Linker Linker;
+ llvm::TargetMachine *TargetMach;
+ bool EmitDwarfDebugInfo;
+ bool ScopeRestrictionsDone;
+ lto_codegen_model CodeModel;
+ StringSet MustPreserveSymbols;
+ StringSet AsmUndefinedRefs;
+ llvm::MemoryBuffer *NativeObjectFile;
+ std::vector<char *> CodegenOptions;
+ std::string MCpu;
+ std::string NativeObjectPath;
+};
+
+#endif // LTO_CODE_GENERATOR_H
--- /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-c/lto.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Target/TargetMachine.h"
+#include <string>
+#include <vector>
+
+// Forward references to llvm classes.
+namespace llvm {
+ class Function;
+ class GlobalValue;
+ class MemoryBuffer;
+ class TargetOptions;
+ class Value;
+}
+
+//===----------------------------------------------------------------------===//
+/// LTOModule - C++ class which implements the opaque lto_module_t type.
+///
+struct LTOModule {
+private:
+ typedef llvm::StringMap<uint8_t> StringSet;
+
+ struct NameAndAttributes {
+ const char *name;
+ uint32_t attributes;
+ bool isFunction;
+ const llvm::GlobalValue *symbol;
+ };
+
+ llvm::OwningPtr<llvm::Module> _module;
+ llvm::OwningPtr<llvm::TargetMachine> _target;
+ std::vector<NameAndAttributes> _symbols;
+
+ // _defines and _undefines only needed to disambiguate tentative definitions
+ StringSet _defines;
+ llvm::StringMap<NameAndAttributes> _undefines;
+ std::vector<const char*> _asm_undefines;
+ llvm::MCContext _context;
+
+ // Use mangler to add GlobalPrefix to names to match linker names.
+ llvm::Mangler _mangler;
+
+ LTOModule(llvm::Module *m, llvm::TargetMachine *t);
+public:
+ /// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
+ /// bitcode.
+ static bool isBitcodeFile(const void *mem, size_t length);
+ static bool isBitcodeFile(const char *path);
+
+ /// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
+ /// is LLVM bitcode for the specified triple.
+ static bool isBitcodeFileForTarget(const void *mem,
+ size_t length,
+ const char *triplePrefix);
+ static bool isBitcodeFileForTarget(const char *path,
+ const char *triplePrefix);
+
+ /// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
+ /// of the buffer. The caller must have initialized the Targets, the
+ /// TargetMCs, the AsmPrinters, and the AsmParsers by calling:
+ ///
+ /// InitializeAllTargets();
+ /// InitializeAllTargetMCs();
+ /// InitializeAllAsmPrinters();
+ /// InitializeAllAsmParsers();
+ static LTOModule *makeLTOModule(const char* path,
+ std::string &errMsg);
+ static LTOModule *makeLTOModule(int fd, const char *path,
+ size_t size, std::string &errMsg);
+ static LTOModule *makeLTOModule(int fd, const char *path,
+ size_t map_size,
+ off_t offset,
+ std::string& errMsg);
+ static LTOModule *makeLTOModule(const void *mem, size_t length,
+ std::string &errMsg);
+
+ /// getTargetTriple - Return the Module's target triple.
+ const char *getTargetTriple() {
+ return _module->getTargetTriple().c_str();
+ }
+
+ /// setTargetTriple - Set the Module's target triple.
+ void setTargetTriple(const char *triple) {
+ _module->setTargetTriple(triple);
+ }
+
+ /// getSymbolCount - Get the number of symbols
+ uint32_t getSymbolCount() {
+ return _symbols.size();
+ }
+
+ /// getSymbolAttributes - Get the attributes for a symbol at the specified
+ /// index.
+ lto_symbol_attributes getSymbolAttributes(uint32_t index) {
+ if (index < _symbols.size())
+ return lto_symbol_attributes(_symbols[index].attributes);
+ return lto_symbol_attributes(0);
+ }
+
+ /// getSymbolName - Get the name of the symbol at the specified index.
+ const char *getSymbolName(uint32_t index) {
+ if (index < _symbols.size())
+ return _symbols[index].name;
+ return NULL;
+ }
+
+ /// getLLVVMModule - Return the Module.
+ llvm::Module *getLLVVMModule() { return _module.get(); }
+
+ /// getAsmUndefinedRefs -
+ const std::vector<const char*> &getAsmUndefinedRefs() {
+ return _asm_undefines;
+ }
+
+ /// getTargetOptions - Fill the TargetOptions object with the options
+ /// specified on the command line.
+ static void getTargetOptions(llvm::TargetOptions &Options);
+
+private:
+ /// parseSymbols - Parse the symbols from the module and model-level ASM and
+ /// add them to either the defined or undefined lists.
+ bool parseSymbols(std::string &errMsg);
+
+ /// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
+ /// to a list to be resolved later.
+ void addPotentialUndefinedSymbol(const llvm::GlobalValue *dcl, bool isFunc);
+
+ /// addDefinedSymbol - Add a defined symbol to the list.
+ void addDefinedSymbol(const llvm::GlobalValue *def, bool isFunction);
+
+ /// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
+ void addDefinedFunctionSymbol(const llvm::Function *f);
+
+ /// addDefinedDataSymbol - Add a data symbol as defined to the list.
+ void addDefinedDataSymbol(const llvm::GlobalValue *v);
+
+ /// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
+ /// defined or undefined lists.
+ bool addAsmGlobalSymbols(std::string &errMsg);
+
+ /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
+ /// defined list.
+ void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
+
+ /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
+ /// the undefined list.
+ void addAsmGlobalSymbolUndef(const char *);
+
+ /// addObjCClass - Parse i386/ppc ObjC class data structure.
+ void addObjCClass(const llvm::GlobalVariable *clgv);
+
+ /// addObjCCategory - Parse i386/ppc ObjC category data structure.
+ void addObjCCategory(const llvm::GlobalVariable *clgv);
+
+ /// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
+ void addObjCClassRef(const llvm::GlobalVariable *clgv);
+
+ /// objcClassNameFromExpression - Get string that the data pointer points
+ /// to.
+ bool objcClassNameFromExpression(const llvm::Constant* c, std::string &name);
+
+ /// isTargetMatch - Returns 'true' if the memory buffer is for the specified
+ /// target triple.
+ static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
+ const char *triplePrefix);
+
+ /// makeLTOModule - Create an LTOModule (private version). N.B. This
+ /// method takes ownership of the buffer.
+ static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
+ std::string &errMsg);
+
+ /// makeBuffer - Create a MemoryBuffer from a memory range.
+ static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length);
+};
+
+#endif // LTO_MODULE_H
add_subdirectory(Transforms)
add_subdirectory(Linker)
add_subdirectory(Analysis)
+add_subdirectory(LTO)
add_subdirectory(MC)
add_subdirectory(Object)
add_subdirectory(Option)
;===------------------------------------------------------------------------===;
[common]
-subdirectories = Analysis AsmParser Bitcode CodeGen DebugInfo ExecutionEngine Linker IR IRReader MC Object Option Support TableGen Target Transforms
+subdirectories = Analysis AsmParser Bitcode CodeGen DebugInfo ExecutionEngine Linker IR IRReader LTO MC Object Option Support TableGen Target Transforms
[component_0]
type = Group
--- /dev/null
+add_llvm_library(LLVMLTO
+ LTOModule.cpp
+ LTOCodeGenerator.cpp
+ )
--- /dev/null
+;===- ./lib/LTO/LLVMBuild.txt ----------------------------------*- Conf -*--===;
+;
+; The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+; http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Library
+name = LTO
+parent = Libraries
+required_libraries = Analysis BitReader BitWriter Core IPO Linker MC MCParser Scalar Support Target Vectorize
\ No newline at end of file
--- /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 "llvm/LTO/LTOCodeGenerator.h"
+#include "llvm/LTO/LTOModule.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/PassManager.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/FormattedStream.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/Target/TargetRegisterInfo.h"
+#include "llvm/Target/Mangler.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/Transforms/ObjCARC.h"
+using namespace llvm;
+
+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),
+ cl::desc("Do not run the inliner pass"));
+
+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() {
+#ifdef LLVM_VERSION_INFO
+ return PACKAGE_NAME " version " PACKAGE_VERSION ", " LLVM_VERSION_INFO;
+#else
+ return PACKAGE_NAME " version " PACKAGE_VERSION;
+#endif
+}
+
+LTOCodeGenerator::LTOCodeGenerator()
+ : Context(getGlobalContext()), Linker(new Module("ld-temp.o", Context)),
+ TargetMach(NULL), EmitDwarfDebugInfo(false), ScopeRestrictionsDone(false),
+ CodeModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC), NativeObjectFile(NULL) {
+ initializeLTOPasses();
+}
+
+LTOCodeGenerator::~LTOCodeGenerator() {
+ delete TargetMach;
+ delete NativeObjectFile;
+ delete Linker.getModule();
+
+ 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);
+
+ const std::vector<const char*> &undefs = mod->getAsmUndefinedRefs();
+ for (int i = 0, e = undefs.size(); i != e; ++i)
+ AsmUndefinedRefs[undefs[i]] = 1;
+
+ return !ret;
+}
+
+void LTOCodeGenerator::setDebugInfo(lto_debug_model debug) {
+ switch (debug) {
+ case LTO_DEBUG_MODEL_NONE:
+ EmitDwarfDebugInfo = false;
+ return;
+
+ case LTO_DEBUG_MODEL_DWARF:
+ EmitDwarfDebugInfo = true;
+ return;
+ }
+ llvm_unreachable("Unknown debug format!");
+}
+
+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;
+ }
+ llvm_unreachable("Unknown PIC model!");
+}
+
+bool LTOCodeGenerator::writeMergedModules(const char *path,
+ std::string &errMsg) {
+ 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, sys::fs::F_Binary);
+ if (!ErrInfo.empty()) {
+ errMsg = "could not open bitcode file for writing: ";
+ errMsg += path;
+ return false;
+ }
+
+ // write bitcode to it
+ 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 false;
+ }
+
+ Out.keep();
+ return true;
+}
+
+bool LTOCodeGenerator::compile_to_file(const char** name, std::string& errMsg) {
+ // make unique temp .o file to put generated object file
+ SmallString<128> Filename;
+ int FD;
+ error_code EC = sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
+ if (EC) {
+ errMsg = EC.message();
+ return false;
+ }
+
+ // generate object file
+ tool_output_file objFile(Filename.c_str(), FD);
+
+ bool genResult = generateObjectFile(objFile.os(), errMsg);
+ objFile.os().close();
+ if (objFile.os().has_error()) {
+ objFile.os().clear_error();
+ sys::fs::remove(Twine(Filename));
+ return false;
+ }
+
+ objFile.keep();
+ if (!genResult) {
+ sys::fs::remove(Twine(Filename));
+ 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))
+ return NULL;
+
+ // remove old buffer if compile() called twice
+ 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();
+
+ // remove temp files
+ sys::fs::remove(NativeObjectPath);
+
+ // return buffer, unless error
+ if (NativeObjectFile == NULL)
+ return NULL;
+ *length = NativeObjectFile->getBufferSize();
+ return NativeObjectFile->getBufferStart();
+}
+
+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(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";
+ }
+ 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) {
+ SmallString<64> Buffer;
+ 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);
+}
+
+static void findUsedValues(GlobalVariable *LLVMUsed,
+ SmallPtrSet<GlobalValue*, 8> &UsedValues) {
+ if (LLVMUsed == 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()))
+ UsedValues.insert(GV);
+}
+
+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
+ 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);
+ for (Module::global_iterator v = mergedModule->global_begin(),
+ e = mergedModule->global_end(); v != e; ++v)
+ 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);
+
+ GlobalVariable *LLVMCompilerUsed =
+ mergedModule->getGlobalVariable("llvm.compiler.used");
+ findUsedValues(LLVMCompilerUsed, AsmUsed);
+ if (LLVMCompilerUsed)
+ LLVMCompilerUsed->eraseFromParent();
+
+ 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");
+
+ LLVMCompilerUsed->setSection("llvm.metadata");
+ }
+
+ passes.add(createInternalizePass(MustPreserveList));
+
+ // apply scope restrictions
+ passes.run(*mergedModule);
+
+ ScopeRestrictionsDone = true;
+}
+
+/// Optimize merged modules using various IPO passes
+bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
+ std::string &errMsg) {
+ if (!this->determineTarget(errMsg))
+ return false;
+
+ Module *mergedModule = Linker.getModule();
+
+ // 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 DataLayout instance for this module...
+ passes.add(new DataLayout(*TargetMach->getDataLayout()));
+ TargetMach->addAnalysisPasses(passes);
+
+ // 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());
+
+ PassManager codeGenPasses;
+
+ codeGenPasses.add(new DataLayout(*TargetMach->getDataLayout()));
+ TargetMach->addAnalysisPasses(codeGenPasses);
+
+ formatted_raw_ostream Out(out);
+
+ // 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 false;
+ }
+
+ // Run our queue of passes all at once now, efficiently.
+ passes.run(*mergedModule);
+
+ // Run the code generator, and write assembly file
+ codeGenPasses.run(*mergedModule);
+
+ return true;
+}
+
+/// setCodeGenDebugOptions - Set codegen debugging options to aid in debugging
+/// LTO problems.
+void LTOCodeGenerator::setCodeGenDebugOptions(const char *options) {
+ for (std::pair<StringRef, StringRef> o = getToken(options);
+ !o.first.empty(); o = getToken(o.second)) {
+ // ParseCommandLineOptions() expects argv[0] to be program name. Lazily add
+ // that.
+ if (CodegenOptions.empty())
+ CodegenOptions.push_back(strdup("libLLVMLTO"));
+ CodegenOptions.push_back(strdup(o.first.str().c_str()));
+ }
+}
--- /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 "llvm/LTO/LTOModule.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCParser/MCAsmParser.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/system_error.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+using namespace llvm;
+
+static cl::opt<bool>
+EnableFPMAD("enable-fp-mad",
+ cl::desc("Enable less precise MAD instructions to be generated"),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableFPElim("disable-fp-elim",
+ cl::desc("Disable frame pointer elimination optimization"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableUnsafeFPMath("enable-unsafe-fp-math",
+ cl::desc("Enable optimizations that may decrease FP precision"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableNoInfsFPMath("enable-no-infs-fp-math",
+ cl::desc("Enable FP math optimizations that assume no +-Infs"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableNoNaNsFPMath("enable-no-nans-fp-math",
+ cl::desc("Enable FP math optimizations that assume no NaNs"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
+ cl::Hidden,
+ cl::desc("Force codegen to assume rounding mode can change dynamically"),
+ cl::init(false));
+
+static cl::opt<bool>
+GenerateSoftFloatCalls("soft-float",
+ cl::desc("Generate software floating point library calls"),
+ cl::init(false));
+
+static cl::opt<llvm::FloatABI::ABIType>
+FloatABIForCalls("float-abi",
+ cl::desc("Choose float ABI type"),
+ cl::init(FloatABI::Default),
+ cl::values(
+ clEnumValN(FloatABI::Default, "default",
+ "Target default float ABI type"),
+ clEnumValN(FloatABI::Soft, "soft",
+ "Soft float ABI (implied by -soft-float)"),
+ clEnumValN(FloatABI::Hard, "hard",
+ "Hard float ABI (uses FP registers)"),
+ clEnumValEnd));
+
+static cl::opt<llvm::FPOpFusion::FPOpFusionMode>
+FuseFPOps("fp-contract",
+ cl::desc("Enable aggresive formation of fused FP ops"),
+ cl::init(FPOpFusion::Standard),
+ cl::values(
+ clEnumValN(FPOpFusion::Fast, "fast",
+ "Fuse FP ops whenever profitable"),
+ clEnumValN(FPOpFusion::Standard, "on",
+ "Only fuse 'blessed' FP ops."),
+ clEnumValN(FPOpFusion::Strict, "off",
+ "Only fuse FP ops when the result won't be effected."),
+ clEnumValEnd));
+
+static cl::opt<bool>
+DontPlaceZerosInBSS("nozero-initialized-in-bss",
+ cl::desc("Don't place zero-initialized symbols into bss section"),
+ cl::init(false));
+
+static cl::opt<bool>
+EnableGuaranteedTailCallOpt("tailcallopt",
+ cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableTailCalls("disable-tail-calls",
+ cl::desc("Never emit tail calls"),
+ cl::init(false));
+
+static cl::opt<unsigned>
+OverrideStackAlignment("stack-alignment",
+ cl::desc("Override default stack alignment"),
+ cl::init(0));
+
+static cl::opt<std::string>
+TrapFuncName("trap-func", cl::Hidden,
+ cl::desc("Emit a call to trap function rather than a trap instruction"),
+ cl::init(""));
+
+static cl::opt<bool>
+EnablePIE("enable-pie",
+ cl::desc("Assume the creation of a position independent executable."),
+ cl::init(false));
+
+static cl::opt<bool>
+SegmentedStacks("segmented-stacks",
+ cl::desc("Use segmented stacks if possible."),
+ cl::init(false));
+
+static cl::opt<bool>
+UseInitArray("use-init-array",
+ cl::desc("Use .init_array instead of .ctors."),
+ cl::init(false));
+
+LTOModule::LTOModule(llvm::Module *m, llvm::TargetMachine *t)
+ : _module(m), _target(t),
+ _context(_target->getMCAsmInfo(), _target->getRegisterInfo(), NULL),
+ _mangler(_context, t) {}
+
+/// isBitcodeFile - Returns 'true' if the file (or memory contents) is LLVM
+/// bitcode.
+bool LTOModule::isBitcodeFile(const void *mem, size_t length) {
+ return sys::fs::identify_magic(StringRef((const char *)mem, length)) ==
+ sys::fs::file_magic::bitcode;
+}
+
+bool LTOModule::isBitcodeFile(const char *path) {
+ sys::fs::file_magic type;
+ if (sys::fs::identify_magic(path, type))
+ return false;
+ return type == sys::fs::file_magic::bitcode;
+}
+
+/// isBitcodeFileForTarget - Returns 'true' if the file (or memory contents) is
+/// LLVM bitcode for the specified triple.
+bool LTOModule::isBitcodeFileForTarget(const void *mem, size_t length,
+ const char *triplePrefix) {
+ MemoryBuffer *buffer = makeBuffer(mem, length);
+ if (!buffer)
+ return false;
+ return isTargetMatch(buffer, triplePrefix);
+}
+
+bool LTOModule::isBitcodeFileForTarget(const char *path,
+ const char *triplePrefix) {
+ OwningPtr<MemoryBuffer> buffer;
+ if (MemoryBuffer::getFile(path, buffer))
+ return false;
+ return isTargetMatch(buffer.take(), triplePrefix);
+}
+
+/// isTargetMatch - Returns 'true' if the memory buffer is for the specified
+/// target triple.
+bool LTOModule::isTargetMatch(MemoryBuffer *buffer, const char *triplePrefix) {
+ std::string Triple = getBitcodeTargetTriple(buffer, getGlobalContext());
+ delete buffer;
+ return strncmp(Triple.c_str(), triplePrefix, strlen(triplePrefix)) == 0;
+}
+
+/// makeLTOModule - Create an LTOModule. N.B. These methods take ownership of
+/// the buffer.
+LTOModule *LTOModule::makeLTOModule(const char *path, std::string &errMsg) {
+ OwningPtr<MemoryBuffer> buffer;
+ if (error_code ec = MemoryBuffer::getFile(path, buffer)) {
+ errMsg = ec.message();
+ return NULL;
+ }
+ return makeLTOModule(buffer.take(), errMsg);
+}
+
+LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
+ size_t size, std::string &errMsg) {
+ return makeLTOModule(fd, path, size, 0, errMsg);
+}
+
+LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
+ size_t map_size,
+ off_t offset,
+ std::string &errMsg) {
+ OwningPtr<MemoryBuffer> buffer;
+ if (error_code ec =
+ MemoryBuffer::getOpenFileSlice(fd, path, buffer, map_size, offset)) {
+ errMsg = ec.message();
+ return NULL;
+ }
+ return makeLTOModule(buffer.take(), errMsg);
+}
+
+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.take(), errMsg);
+}
+
+void LTOModule::getTargetOptions(TargetOptions &Options) {
+ Options.LessPreciseFPMADOption = EnableFPMAD;
+ Options.NoFramePointerElim = DisableFPElim;
+ Options.AllowFPOpFusion = FuseFPOps;
+ Options.UnsafeFPMath = EnableUnsafeFPMath;
+ Options.NoInfsFPMath = EnableNoInfsFPMath;
+ Options.NoNaNsFPMath = EnableNoNaNsFPMath;
+ Options.HonorSignDependentRoundingFPMathOption =
+ EnableHonorSignDependentRoundingFPMath;
+ Options.UseSoftFloat = GenerateSoftFloatCalls;
+ if (FloatABIForCalls != FloatABI::Default)
+ Options.FloatABIType = FloatABIForCalls;
+ Options.NoZerosInBSS = DontPlaceZerosInBSS;
+ Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
+ Options.DisableTailCalls = DisableTailCalls;
+ Options.StackAlignmentOverride = OverrideStackAlignment;
+ Options.TrapFuncName = TrapFuncName;
+ Options.PositionIndependentExecutable = EnablePIE;
+ Options.EnableSegmentedStacks = SegmentedStacks;
+ Options.UseInitArray = UseInitArray;
+}
+
+LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
+ std::string &errMsg) {
+ // parse bitcode buffer
+ OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext(),
+ &errMsg));
+ if (!m) {
+ delete buffer;
+ return NULL;
+ }
+
+ std::string TripleStr = m->getTargetTriple();
+ if (TripleStr.empty())
+ TripleStr = sys::getDefaultTargetTriple();
+ llvm::Triple Triple(TripleStr);
+
+ // find machine architecture for this module
+ const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg);
+ if (!march)
+ return NULL;
+
+ // 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.
+ std::string CPU;
+ if (Triple.isOSDarwin()) {
+ if (Triple.getArch() == llvm::Triple::x86_64)
+ CPU = "core2";
+ else if (Triple.getArch() == llvm::Triple::x86)
+ CPU = "yonah";
+ }
+ TargetOptions Options;
+ getTargetOptions(Options);
+ TargetMachine *target = march->createTargetMachine(TripleStr, CPU, FeatureStr,
+ Options);
+ LTOModule *Ret = new LTOModule(m.take(), target);
+ if (Ret->parseSymbols(errMsg)) {
+ delete Ret;
+ return NULL;
+ }
+
+ return Ret;
+}
+
+/// makeBuffer - Create a MemoryBuffer from a memory range.
+MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length) {
+ const char *startPtr = (const char*)mem;
+ return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), "", false);
+}
+
+/// objcClassNameFromExpression - Get string that the data pointer points to.
+bool
+LTOModule::objcClassNameFromExpression(const Constant *c, std::string &name) {
+ if (const ConstantExpr *ce = dyn_cast<ConstantExpr>(c)) {
+ Constant *op = ce->getOperand(0);
+ if (GlobalVariable *gvn = dyn_cast<GlobalVariable>(op)) {
+ Constant *cn = gvn->getInitializer();
+ if (ConstantDataArray *ca = dyn_cast<ConstantDataArray>(cn)) {
+ if (ca->isCString()) {
+ name = ".objc_class_name_" + ca->getAsCString().str();
+ return true;
+ }
+ }
+ }
+ }
+ return false;
+}
+
+/// addObjCClass - Parse i386/ppc ObjC class data structure.
+void LTOModule::addObjCClass(const GlobalVariable *clgv) {
+ const ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
+ if (!c) return;
+
+ // second slot in __OBJC,__class is pointer to superclass name
+ std::string superclassName;
+ if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
+ NameAndAttributes info;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(superclassName);
+ if (!entry.getValue().name) {
+ const char *symbolName = entry.getKey().data();
+ info.name = symbolName;
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ info.isFunction = false;
+ info.symbol = clgv;
+ entry.setValue(info);
+ }
+ }
+
+ // third slot in __OBJC,__class is pointer to class name
+ std::string className;
+ if (objcClassNameFromExpression(c->getOperand(2), className)) {
+ StringSet::value_type &entry = _defines.GetOrCreateValue(className);
+ entry.setValue(1);
+
+ NameAndAttributes info;
+ info.name = entry.getKey().data();
+ info.attributes = LTO_SYMBOL_PERMISSIONS_DATA |
+ LTO_SYMBOL_DEFINITION_REGULAR | LTO_SYMBOL_SCOPE_DEFAULT;
+ info.isFunction = false;
+ info.symbol = clgv;
+ _symbols.push_back(info);
+ }
+}
+
+/// addObjCCategory - Parse i386/ppc ObjC category data structure.
+void LTOModule::addObjCCategory(const GlobalVariable *clgv) {
+ const ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
+ if (!c) return;
+
+ // second slot in __OBJC,__category is pointer to target class name
+ std::string targetclassName;
+ if (!objcClassNameFromExpression(c->getOperand(1), targetclassName))
+ return;
+
+ NameAndAttributes info;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(targetclassName);
+
+ if (entry.getValue().name)
+ return;
+
+ const char *symbolName = entry.getKey().data();
+ info.name = symbolName;
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ info.isFunction = false;
+ info.symbol = clgv;
+ entry.setValue(info);
+}
+
+/// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
+void LTOModule::addObjCClassRef(const GlobalVariable *clgv) {
+ std::string targetclassName;
+ if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName))
+ return;
+
+ NameAndAttributes info;
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(targetclassName);
+ if (entry.getValue().name)
+ return;
+
+ const char *symbolName = entry.getKey().data();
+ info.name = symbolName;
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+ info.isFunction = false;
+ info.symbol = clgv;
+ entry.setValue(info);
+}
+
+/// addDefinedDataSymbol - Add a data symbol as defined to the list.
+void LTOModule::addDefinedDataSymbol(const GlobalValue *v) {
+ // Add to list of defined symbols.
+ addDefinedSymbol(v, false);
+
+ if (!v->hasSection() /* || !isTargetDarwin */)
+ return;
+
+ // Special case i386/ppc ObjC data structures in magic sections:
+ // The issue is that the old ObjC object format did some strange
+ // contortions to avoid real linker symbols. For instance, the
+ // ObjC class data structure is allocated statically in the executable
+ // that defines that class. That data structures contains a pointer to
+ // its superclass. But instead of just initializing that part of the
+ // struct to the address of its superclass, and letting the static and
+ // dynamic linkers do the rest, the runtime works by having that field
+ // instead point to a C-string that is the name of the superclass.
+ // At runtime the objc initialization updates that pointer and sets
+ // it to point to the actual super class. As far as the linker
+ // knows it is just a pointer to a string. But then someone wanted the
+ // linker to issue errors at build time if the superclass was not found.
+ // So they figured out a way in mach-o object format to use an absolute
+ // symbols (.objc_class_name_Foo = 0) and a floating reference
+ // (.reference .objc_class_name_Bar) to cause the linker into erroring when
+ // a class was missing.
+ // The following synthesizes the implicit .objc_* symbols for the linker
+ // from the ObjC data structures generated by the front end.
+
+ // special case if this data blob is an ObjC class definition
+ if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
+ if (const GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCClass(gv);
+ }
+ }
+
+ // special case if this data blob is an ObjC category definition
+ else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
+ if (const GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCCategory(gv);
+ }
+ }
+
+ // special case if this data blob is the list of referenced classes
+ else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
+ if (const GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
+ addObjCClassRef(gv);
+ }
+ }
+}
+
+/// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
+void LTOModule::addDefinedFunctionSymbol(const Function *f) {
+ // add to list of defined symbols
+ addDefinedSymbol(f, true);
+}
+
+/// addDefinedSymbol - Add a defined symbol to the list.
+void LTOModule::addDefinedSymbol(const GlobalValue *def, bool isFunction) {
+ // ignore all llvm.* symbols
+ if (def->getName().startswith("llvm."))
+ return;
+
+ // string is owned by _defines
+ SmallString<64> Buffer;
+ _mangler.getNameWithPrefix(Buffer, def, false);
+
+ // set alignment part log2() can have rounding errors
+ uint32_t align = def->getAlignment();
+ uint32_t attr = align ? countTrailingZeros(def->getAlignment()) : 0;
+
+ // set permissions part
+ if (isFunction) {
+ attr |= LTO_SYMBOL_PERMISSIONS_CODE;
+ } else {
+ const GlobalVariable *gv = dyn_cast<GlobalVariable>(def);
+ if (gv && gv->isConstant())
+ attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
+ else
+ attr |= LTO_SYMBOL_PERMISSIONS_DATA;
+ }
+
+ // set definition part
+ if (def->hasWeakLinkage() || def->hasLinkOnceLinkage() ||
+ def->hasLinkerPrivateWeakLinkage())
+ attr |= LTO_SYMBOL_DEFINITION_WEAK;
+ else if (def->hasCommonLinkage())
+ attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
+ else
+ attr |= LTO_SYMBOL_DEFINITION_REGULAR;
+
+ // set scope part
+ if (def->hasHiddenVisibility())
+ attr |= LTO_SYMBOL_SCOPE_HIDDEN;
+ else if (def->hasProtectedVisibility())
+ attr |= LTO_SYMBOL_SCOPE_PROTECTED;
+ else if (def->hasExternalLinkage() || def->hasWeakLinkage() ||
+ def->hasLinkOnceLinkage() || def->hasCommonLinkage() ||
+ def->hasLinkerPrivateWeakLinkage())
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ else if (def->hasLinkOnceODRAutoHideLinkage())
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN;
+ else
+ attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+
+ StringSet::value_type &entry = _defines.GetOrCreateValue(Buffer);
+ entry.setValue(1);
+
+ // fill information structure
+ NameAndAttributes info;
+ StringRef Name = entry.getKey();
+ info.name = Name.data();
+ assert(info.name[Name.size()] == '\0');
+ info.attributes = attr;
+ info.isFunction = isFunction;
+ info.symbol = def;
+
+ // add to table of symbols
+ _symbols.push_back(info);
+}
+
+/// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
+/// defined list.
+void LTOModule::addAsmGlobalSymbol(const char *name,
+ lto_symbol_attributes scope) {
+ StringSet::value_type &entry = _defines.GetOrCreateValue(name);
+
+ // only add new define if not already defined
+ if (entry.getValue())
+ return;
+
+ entry.setValue(1);
+
+ NameAndAttributes &info = _undefines[entry.getKey().data()];
+
+ if (info.symbol == 0) {
+ // FIXME: This is trying to take care of module ASM like this:
+ //
+ // module asm ".zerofill __FOO, __foo, _bar_baz_qux, 0"
+ //
+ // but is gross and its mother dresses it funny. Have the ASM parser give us
+ // more details for this type of situation so that we're not guessing so
+ // much.
+
+ // fill information structure
+ info.name = entry.getKey().data();
+ info.attributes =
+ LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope;
+ info.isFunction = false;
+ info.symbol = 0;
+
+ // add to table of symbols
+ _symbols.push_back(info);
+ return;
+ }
+
+ if (info.isFunction)
+ addDefinedFunctionSymbol(cast<Function>(info.symbol));
+ else
+ addDefinedDataSymbol(info.symbol);
+
+ _symbols.back().attributes &= ~LTO_SYMBOL_SCOPE_MASK;
+ _symbols.back().attributes |= scope;
+}
+
+/// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to the
+/// undefined list.
+void LTOModule::addAsmGlobalSymbolUndef(const char *name) {
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(name);
+
+ _asm_undefines.push_back(entry.getKey().data());
+
+ // we already have the symbol
+ if (entry.getValue().name)
+ return;
+
+ uint32_t attr = LTO_SYMBOL_DEFINITION_UNDEFINED;;
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
+ NameAndAttributes info;
+ info.name = entry.getKey().data();
+ info.attributes = attr;
+ info.isFunction = false;
+ info.symbol = 0;
+
+ entry.setValue(info);
+}
+
+/// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet to a
+/// list to be resolved later.
+void
+LTOModule::addPotentialUndefinedSymbol(const GlobalValue *decl, bool isFunc) {
+ // ignore all llvm.* symbols
+ if (decl->getName().startswith("llvm."))
+ return;
+
+ // ignore all aliases
+ if (isa<GlobalAlias>(decl))
+ return;
+
+ SmallString<64> name;
+ _mangler.getNameWithPrefix(name, decl, false);
+
+ StringMap<NameAndAttributes>::value_type &entry =
+ _undefines.GetOrCreateValue(name);
+
+ // we already have the symbol
+ if (entry.getValue().name)
+ return;
+
+ NameAndAttributes info;
+
+ info.name = entry.getKey().data();
+
+ if (decl->hasExternalWeakLinkage())
+ info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
+ else
+ info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
+
+ info.isFunction = isFunc;
+ info.symbol = decl;
+
+ entry.setValue(info);
+}
+
+namespace {
+ class RecordStreamer : public MCStreamer {
+ public:
+ enum State { NeverSeen, Global, Defined, DefinedGlobal, Used };
+
+ private:
+ StringMap<State> Symbols;
+
+ void markDefined(const MCSymbol &Symbol) {
+ State &S = Symbols[Symbol.getName()];
+ switch (S) {
+ case DefinedGlobal:
+ case Global:
+ S = DefinedGlobal;
+ break;
+ case NeverSeen:
+ case Defined:
+ case Used:
+ S = Defined;
+ break;
+ }
+ }
+ void markGlobal(const MCSymbol &Symbol) {
+ State &S = Symbols[Symbol.getName()];
+ switch (S) {
+ case DefinedGlobal:
+ case Defined:
+ S = DefinedGlobal;
+ break;
+
+ case NeverSeen:
+ case Global:
+ case Used:
+ S = Global;
+ break;
+ }
+ }
+ void markUsed(const MCSymbol &Symbol) {
+ State &S = Symbols[Symbol.getName()];
+ switch (S) {
+ case DefinedGlobal:
+ case Defined:
+ case Global:
+ break;
+
+ case NeverSeen:
+ case Used:
+ S = Used;
+ break;
+ }
+ }
+
+ // FIXME: mostly copied for the obj streamer.
+ void AddValueSymbols(const MCExpr *Value) {
+ switch (Value->getKind()) {
+ case MCExpr::Target:
+ // FIXME: What should we do in here?
+ break;
+
+ case MCExpr::Constant:
+ break;
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
+ AddValueSymbols(BE->getLHS());
+ AddValueSymbols(BE->getRHS());
+ break;
+ }
+
+ case MCExpr::SymbolRef:
+ markUsed(cast<MCSymbolRefExpr>(Value)->getSymbol());
+ break;
+
+ case MCExpr::Unary:
+ AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr());
+ break;
+ }
+ }
+
+ public:
+ typedef StringMap<State>::const_iterator const_iterator;
+
+ const_iterator begin() {
+ return Symbols.begin();
+ }
+
+ const_iterator end() {
+ return Symbols.end();
+ }
+
+ RecordStreamer(MCContext &Context)
+ : MCStreamer(SK_RecordStreamer, Context) {}
+
+ virtual void EmitInstruction(const MCInst &Inst) {
+ // Scan for values.
+ for (unsigned i = Inst.getNumOperands(); i--; )
+ if (Inst.getOperand(i).isExpr())
+ AddValueSymbols(Inst.getOperand(i).getExpr());
+ }
+ virtual void EmitLabel(MCSymbol *Symbol) {
+ Symbol->setSection(*getCurrentSection().first);
+ markDefined(*Symbol);
+ }
+ virtual void EmitDebugLabel(MCSymbol *Symbol) {
+ EmitLabel(Symbol);
+ }
+ virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ // FIXME: should we handle aliases?
+ markDefined(*Symbol);
+ }
+ virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) {
+ if (Attribute == MCSA_Global)
+ markGlobal(*Symbol);
+ return true;
+ }
+ virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size , unsigned ByteAlignment) {
+ markDefined(*Symbol);
+ }
+ virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {
+ markDefined(*Symbol);
+ }
+
+ virtual void EmitBundleAlignMode(unsigned AlignPow2) {}
+ virtual void EmitBundleLock(bool AlignToEnd) {}
+ virtual void EmitBundleUnlock() {}
+
+ // Noop calls.
+ virtual void ChangeSection(const MCSection *Section,
+ const MCExpr *Subsection) {}
+ virtual void InitToTextSection() {}
+ virtual void InitSections() {}
+ virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+ virtual void EmitThumbFunc(MCSymbol *Func) {}
+ virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+ virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
+ virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
+ virtual void EmitCOFFSymbolStorageClass(int StorageClass) {}
+ virtual void EmitCOFFSymbolType(int Type) {}
+ virtual void EndCOFFSymbolDef() {}
+ virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
+ virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {}
+ virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {}
+ virtual void EmitBytes(StringRef Data) {}
+ virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) {}
+ virtual void EmitULEB128Value(const MCExpr *Value) {}
+ virtual void EmitSLEB128Value(const MCExpr *Value) {}
+ virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {}
+ virtual void EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {}
+ virtual bool EmitValueToOffset(const MCExpr *Offset,
+ unsigned char Value ) { return false; }
+ virtual void EmitFileDirective(StringRef Filename) {}
+ virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
+ const MCSymbol *LastLabel,
+ const MCSymbol *Label,
+ unsigned PointerSize) {}
+ virtual void FinishImpl() {}
+ virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+ RecordProcEnd(Frame);
+ }
+
+ static bool classof(const MCStreamer *S) {
+ return S->getKind() == SK_RecordStreamer;
+ }
+ };
+} // end anonymous namespace
+
+/// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
+/// defined or undefined lists.
+bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) {
+ const std::string &inlineAsm = _module->getModuleInlineAsm();
+ if (inlineAsm.empty())
+ return false;
+
+ OwningPtr<RecordStreamer> Streamer(new RecordStreamer(_context));
+ MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(inlineAsm);
+ SourceMgr SrcMgr;
+ SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
+ OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
+ _context, *Streamer,
+ *_target->getMCAsmInfo()));
+ const Target &T = _target->getTarget();
+ OwningPtr<MCInstrInfo> MCII(T.createMCInstrInfo());
+ OwningPtr<MCSubtargetInfo>
+ STI(T.createMCSubtargetInfo(_target->getTargetTriple(),
+ _target->getTargetCPU(),
+ _target->getTargetFeatureString()));
+ OwningPtr<MCTargetAsmParser> TAP(T.createMCAsmParser(*STI, *Parser.get(), *MCII));
+ if (!TAP) {
+ errMsg = "target " + std::string(T.getName()) +
+ " does not define AsmParser.";
+ return true;
+ }
+
+ Parser->setTargetParser(*TAP);
+ if (Parser->Run(false))
+ return true;
+
+ for (RecordStreamer::const_iterator i = Streamer->begin(),
+ e = Streamer->end(); i != e; ++i) {
+ StringRef Key = i->first();
+ RecordStreamer::State Value = i->second;
+ if (Value == RecordStreamer::DefinedGlobal)
+ addAsmGlobalSymbol(Key.data(), LTO_SYMBOL_SCOPE_DEFAULT);
+ else if (Value == RecordStreamer::Defined)
+ addAsmGlobalSymbol(Key.data(), LTO_SYMBOL_SCOPE_INTERNAL);
+ else if (Value == RecordStreamer::Global ||
+ Value == RecordStreamer::Used)
+ addAsmGlobalSymbolUndef(Key.data());
+ }
+
+ return false;
+}
+
+/// isDeclaration - Return 'true' if the global value is a declaration.
+static bool isDeclaration(const GlobalValue &V) {
+ if (V.hasAvailableExternallyLinkage())
+ return true;
+
+ if (V.isMaterializable())
+ return false;
+
+ return V.isDeclaration();
+}
+
+/// parseSymbols - Parse the symbols from the module and model-level ASM and add
+/// them to either the defined or undefined lists.
+bool LTOModule::parseSymbols(std::string &errMsg) {
+ // add functions
+ for (Module::iterator f = _module->begin(), e = _module->end(); f != e; ++f) {
+ if (isDeclaration(*f))
+ addPotentialUndefinedSymbol(f, true);
+ else
+ addDefinedFunctionSymbol(f);
+ }
+
+ // add data
+ for (Module::global_iterator v = _module->global_begin(),
+ e = _module->global_end(); v != e; ++v) {
+ if (isDeclaration(*v))
+ addPotentialUndefinedSymbol(v, false);
+ else
+ addDefinedDataSymbol(v);
+ }
+
+ // add asm globals
+ if (addAsmGlobalSymbols(errMsg))
+ return true;
+
+ // add aliases
+ for (Module::alias_iterator a = _module->alias_begin(),
+ e = _module->alias_end(); a != e; ++a) {
+ if (isDeclaration(*a->getAliasedGlobal()))
+ // Is an alias to a declaration.
+ addPotentialUndefinedSymbol(a, false);
+ else
+ addDefinedDataSymbol(a);
+ }
+
+ // make symbols for all undefines
+ for (StringMap<NameAndAttributes>::iterator u =_undefines.begin(),
+ e = _undefines.end(); u != e; ++u) {
+ // If this symbol also has a definition, then don't make an undefine because
+ // it is a tentative definition.
+ if (_defines.count(u->getKey())) continue;
+ NameAndAttributes info = u->getValue();
+ _symbols.push_back(info);
+ }
+
+ return false;
+}
--- /dev/null
+##===- lib/Linker/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 = LLVMLTO
+BUILD_ARCHIVE := 1
+
+include $(LEVEL)/Makefile.common
+
include $(LEVEL)/Makefile.config
PARALLEL_DIRS := IR AsmParser Bitcode Analysis Transforms CodeGen \
- Target ExecutionEngine Linker MC Object Option DebugInfo \
+ Target ExecutionEngine Linker LTO MC Object Option DebugInfo \
IRReader
include $(LEVEL)/Makefile.common
--- /dev/null
+; RUN: llvm-as < %s >%t1
+; RUN: llvm-lto -o %t2 %t1
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+module asm ".text"
+module asm ".align 16, 0x90"
+module asm ".type PR14512, @function"
+module asm "PR14512:.cfi_startproc"
+module asm "ret"
+module asm ".cfi_endproc"
+
+declare void @PR14512()
+
+define i32 @main(i32 %argc, i8** %argv) {
+ call void @PR14512()
+ ret i32 0
+}
+; XFAIL: win32
--- /dev/null
+targets = set(config.root.targets_to_build.split())
+if not 'X86' in targets:
+ config.unsupported = True
+
+if config.root.host_os in ['Cygwin', 'MingW', 'Windows']:
+ config.unsupported = True
+++ /dev/null
-; RUN: llvm-as < %s >%t1
-; RUN: llvm-lto -o %t2 %t1
-
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-module asm ".text"
-module asm ".align 16, 0x90"
-module asm ".type PR14512, @function"
-module asm "PR14512:.cfi_startproc"
-module asm "ret"
-module asm ".cfi_endproc"
-
-declare void @PR14512()
-
-define i32 @main(i32 %argc, i8** %argv) {
- call void @PR14512()
- ret i32 0
-}
-; XFAIL: win32
+++ /dev/null
-targets = set(config.root.targets_to_build.split())
-if not 'X86' in targets:
- config.unsupported = True
-
-if config.root.host_os in ['Cygwin', 'MingW', 'Windows']:
- config.unsupported = True
;===------------------------------------------------------------------------===;
[common]
-subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-jitlistener llvm-link llvm-mc llvm-nm llvm-objdump llvm-prof llvm-rtdyld llvm-size macho-dump opt llvm-mcmarkup
+subdirectories = bugpoint llc lli llvm-ar llvm-as llvm-bcanalyzer llvm-cov llvm-diff llvm-dis llvm-dwarfdump llvm-extract llvm-jitlistener llvm-link llvm-lto llvm-mc llvm-nm llvm-objdump llvm-prof llvm-rtdyld llvm-size macho-dump opt llvm-mcmarkup
[component_0]
type = Group
+set(LLVM_LINK_COMPONENTS ${LLVM_TARGETS_TO_BUILD} lto support)
+
add_llvm_tool(llvm-lto
llvm-lto.cpp
)
-target_link_libraries(llvm-lto LTO LLVMSupport)
-
-add_dependencies(llvm-lto lto)
--- /dev/null
+;===- ./tools/llvm-lto/LLVMBuild.txt ----------------------------*- Conf -*--===;
+;
+; The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+; http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = llvm-lto
+parent = Tools
+required_libraries = LTO Support all-targets
LEVEL := ../..
TOOLNAME := llvm-lto
-LINK_COMPONENTS := support
+LINK_COMPONENTS := lto ipo scalaropts linker bitreader bitwriter mcdisassembler support target vectorize all-targets
# This tool has no plugins, optimize startup time.
TOOL_NO_EXPORTS := 1
NO_INSTALL := 1
include $(LEVEL)/Makefile.common
-
-LDFLAGS += -L$(LibDir)
-LIBS += -lLTO
//
//===----------------------------------------------------------------------===//
-#include "llvm-c/lto.h"
+#include "llvm/LTO/LTOCodeGenerator.h"
+#include "llvm/LTO/LTOModule.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/TargetSelect.h"
using namespace llvm;
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
cl::ParseCommandLineOptions(argc, argv, "llvm LTO linker\n");
+ // Initialize the configured targets.
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmPrinters();
+ InitializeAllAsmParsers();
+
unsigned BaseArg = 0;
std::string ErrorMessage;
- lto_code_gen_t code_gen = lto_codegen_create();
- if (code_gen == NULL)
- errs() << argv[0] << ": error creating a code generation module: "
- << lto_get_error_message() << "\n";
+ LTOCodeGenerator CodeGen;
- lto_codegen_set_pic_model(code_gen, LTO_CODEGEN_PIC_MODEL_DYNAMIC);
- lto_codegen_set_debug_model(code_gen, LTO_DEBUG_MODEL_DWARF);
+ CodeGen.setCodePICModel(LTO_CODEGEN_PIC_MODEL_DYNAMIC);
+ CodeGen.setDebugInfo(LTO_DEBUG_MODEL_DWARF);
for (unsigned i = BaseArg; i < InputFilenames.size(); ++i) {
- lto_module_t BitcodeModule = lto_module_create(InputFilenames[i].c_str());
- if (BitcodeModule == NULL) {
+ std::string error;
+ OwningPtr<LTOModule> Module(LTOModule::makeLTOModule(InputFilenames[i].c_str(),
+ error));
+ if (!error.empty()) {
errs() << argv[0] << ": error loading file '" << InputFilenames[i]
- << "': " << lto_get_error_message() << "\n";
+ << "': " << error << "\n";
return 1;
}
- if (lto_codegen_add_module(code_gen, BitcodeModule)) {
+
+ if (!CodeGen.addModule(Module.get(), error)) {
errs() << argv[0] << ": error adding file '" << InputFilenames[i]
- << "': " << lto_get_error_message() << "\n";
- lto_module_dispose(BitcodeModule);
+ << "': " << error << "\n";
return 1;
}
-
- lto_module_dispose(BitcodeModule);
}
if (!OutputFilename.empty()) {
size_t len = 0;
- const void *Code = lto_codegen_compile(code_gen, &len);
+ std::string ErrorInfo;
+ const void *Code = CodeGen.compile(&len, ErrorInfo);
if (Code == NULL) {
errs() << argv[0]
- << ": error compiling the code: " << lto_get_error_message()
- << "\n";
+ << ": error compiling the code: " << ErrorInfo << "\n";
return 1;
}
- std::string ErrorInfo;
raw_fd_ostream FileStream(OutputFilename.c_str(), ErrorInfo);
if (!ErrorInfo.empty()) {
errs() << argv[0] << ": error opening the file '" << OutputFilename
FileStream.write(reinterpret_cast<const char *>(Code), len);
} else {
+ std::string ErrorInfo;
const char *OutputName = NULL;
- if (lto_codegen_compile_to_file(code_gen, &OutputName)) {
+ if (!CodeGen.compile_to_file(&OutputName, ErrorInfo)) {
errs() << argv[0]
- << ": error compiling the code: " << lto_get_error_message()
+ << ": error compiling the code: " << ErrorInfo
<< "\n";
return 1;
}
outs() << "Wrote native object file '" << OutputName << "'\n";
}
- lto_codegen_dispose(code_gen);
-
return 0;
}
set(LLVM_LINK_COMPONENTS
${LLVM_TARGETS_TO_BUILD}
- ipo scalaropts linker bitreader bitwriter mcdisassembler vectorize)
+ ipo scalaropts linker bitreader bitwriter lto mcdisassembler vectorize)
add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
set(SOURCES
- LTOCodeGenerator.cpp
LTODisassembler.cpp
lto.cpp
- LTOModule.cpp
)
if( NOT WIN32 AND LLVM_ENABLE_PIC )
+++ /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 "LTOCodeGenerator.h"
-#include "LTOModule.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/PassManager.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/FormattedStream.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/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>
-DisableOpt("disable-opt", cl::init(false),
- cl::desc("Do not run any optimization passes"));
-
-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),
- cl::desc("Do not run the GVN load PRE pass"));
-
-const char* LTOCodeGenerator::getVersionString() {
-#ifdef LLVM_VERSION_INFO
- return PACKAGE_NAME " version " PACKAGE_VERSION ", " LLVM_VERSION_INFO;
-#else
- return PACKAGE_NAME " version " PACKAGE_VERSION;
-#endif
-}
-
-LTOCodeGenerator::LTOCodeGenerator()
- : Context(getGlobalContext()), Linker(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 TargetMach;
- delete NativeObjectFile;
- delete Linker.getModule();
-
- 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);
-
- const std::vector<const char*> &undefs = mod->getAsmUndefinedRefs();
- for (int i = 0, e = undefs.size(); i != e; ++i)
- AsmUndefinedRefs[undefs[i]] = 1;
-
- return !ret;
-}
-
-void LTOCodeGenerator::setDebugInfo(lto_debug_model debug) {
- switch (debug) {
- case LTO_DEBUG_MODEL_NONE:
- EmitDwarfDebugInfo = false;
- return;
-
- case LTO_DEBUG_MODEL_DWARF:
- EmitDwarfDebugInfo = true;
- return;
- }
- llvm_unreachable("Unknown debug format!");
-}
-
-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;
- }
- llvm_unreachable("Unknown PIC model!");
-}
-
-bool LTOCodeGenerator::writeMergedModules(const char *path,
- std::string &errMsg) {
- 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, sys::fs::F_Binary);
- if (!ErrInfo.empty()) {
- errMsg = "could not open bitcode file for writing: ";
- errMsg += path;
- return false;
- }
-
- // write bitcode to it
- 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 false;
- }
-
- Out.keep();
- return true;
-}
-
-bool LTOCodeGenerator::compile_to_file(const char** name, std::string& errMsg) {
- // make unique temp .o file to put generated object file
- SmallString<128> Filename;
- int FD;
- error_code EC = sys::fs::createTemporaryFile("lto-llvm", "o", FD, Filename);
- if (EC) {
- errMsg = EC.message();
- return false;
- }
-
- // generate object file
- tool_output_file objFile(Filename.c_str(), FD);
-
- bool genResult = generateObjectFile(objFile.os(), errMsg);
- objFile.os().close();
- if (objFile.os().has_error()) {
- objFile.os().clear_error();
- sys::fs::remove(Twine(Filename));
- return false;
- }
-
- objFile.keep();
- if (!genResult) {
- sys::fs::remove(Twine(Filename));
- 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))
- return NULL;
-
- // remove old buffer if compile() called twice
- 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();
-
- // remove temp files
- sys::fs::remove(NativeObjectPath);
-
- // return buffer, unless error
- if (NativeObjectFile == NULL)
- return NULL;
- *length = NativeObjectFile->getBufferSize();
- return NativeObjectFile->getBufferStart();
-}
-
-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(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";
- }
- 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) {
- SmallString<64> Buffer;
- 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);
-}
-
-static void findUsedValues(GlobalVariable *LLVMUsed,
- SmallPtrSet<GlobalValue*, 8> &UsedValues) {
- if (LLVMUsed == 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()))
- UsedValues.insert(GV);
-}
-
-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
- 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);
- for (Module::global_iterator v = mergedModule->global_begin(),
- e = mergedModule->global_end(); v != e; ++v)
- 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);
-
- GlobalVariable *LLVMCompilerUsed =
- mergedModule->getGlobalVariable("llvm.compiler.used");
- findUsedValues(LLVMCompilerUsed, AsmUsed);
- if (LLVMCompilerUsed)
- LLVMCompilerUsed->eraseFromParent();
-
- 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");
-
- LLVMCompilerUsed->setSection("llvm.metadata");
- }
-
- passes.add(createInternalizePass(MustPreserveList));
-
- // apply scope restrictions
- passes.run(*mergedModule);
-
- ScopeRestrictionsDone = true;
-}
-
-/// Optimize merged modules using various IPO passes
-bool LTOCodeGenerator::generateObjectFile(raw_ostream &out,
- std::string &errMsg) {
- if (!this->determineTarget(errMsg))
- return false;
-
- Module *mergedModule = Linker.getModule();
-
- // 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 DataLayout instance for this module...
- passes.add(new DataLayout(*TargetMach->getDataLayout()));
- TargetMach->addAnalysisPasses(passes);
-
- // 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());
-
- PassManager codeGenPasses;
-
- codeGenPasses.add(new DataLayout(*TargetMach->getDataLayout()));
- TargetMach->addAnalysisPasses(codeGenPasses);
-
- formatted_raw_ostream Out(out);
-
- // 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 false;
- }
-
- // Run our queue of passes all at once now, efficiently.
- passes.run(*mergedModule);
-
- // Run the code generator, and write assembly file
- codeGenPasses.run(*mergedModule);
-
- return true;
-}
-
-/// setCodeGenDebugOptions - Set codegen debugging options to aid in debugging
-/// LTO problems.
-void LTOCodeGenerator::setCodeGenDebugOptions(const char *options) {
- for (std::pair<StringRef, StringRef> o = getToken(options);
- !o.first.empty(); o = getToken(o.second)) {
- // ParseCommandLineOptions() expects argv[0] to be program name. Lazily add
- // that.
- if (CodegenOptions.empty())
- CodegenOptions.push_back(strdup("libLTO"));
- CodegenOptions.push_back(strdup(o.first.str().c_str()));
- }
-}
+++ /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.
-//
-// LTO compilation consists of three phases: Pre-IPO, IPO and Post-IPO.
-//
-// The Pre-IPO phase compiles source code into bitcode file. The resulting
-// bitcode files, along with object files and libraries, will be fed to the
-// linker to through the IPO and Post-IPO phases. By using obj-file extension,
-// the resulting bitcode file disguises itself as an object file, and therefore
-// obviates the need of writing a special set of the make-rules only for LTO
-// compilation.
-//
-// The IPO phase perform inter-procedural analyses and optimizations, and
-// the Post-IPO consists two sub-phases: intra-procedural scalar optimizations
-// (SOPT), and intra-procedural target-dependent code generator (CG).
-//
-// As of this writing, we don't separate IPO and the Post-IPO SOPT. They
-// are intermingled together, and are driven by a single pass manager (see
-// PassManagerBuilder::populateLTOPassManager()).
-//
-// The "LTOCodeGenerator" is the driver for the IPO and Post-IPO stages.
-// The "CodeGenerator" here is bit confusing. Don't confuse the "CodeGenerator"
-// with the machine specific code generator.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LTO_CODE_GENERATOR_H
-#define LTO_CODE_GENERATOR_H
-
-#include "llvm-c/lto.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/Linker.h"
-#include <string>
-#include <vector>
-
-namespace llvm {
- class LLVMContext;
- class GlobalValue;
- class Mangler;
- class MemoryBuffer;
- class TargetMachine;
- class raw_ostream;
-}
-
-//===----------------------------------------------------------------------===//
-/// LTOCodeGenerator - C++ class which implements the opaque lto_code_gen_t
-/// type.
-///
-struct LTOCodeGenerator {
- static const char *getVersionString();
-
- LTOCodeGenerator();
- ~LTOCodeGenerator();
-
- // Merge given module, return true on success.
- bool addModule(struct LTOModule*, std::string &errMsg);
-
- void setDebugInfo(lto_debug_model);
- void setCodePICModel(lto_codegen_model);
-
- void setCpu(const char *mCpu) { MCpu = mCpu; }
-
- void addMustPreserveSymbol(const char *sym) { MustPreserveSymbols[sym] = 1; }
-
- // To pass options to the driver and optimization passes. These options are
- // not necessarily for debugging purpose (The function name is misleading).
- // This function should be called before LTOCodeGenerator::compilexxx(),
- // and LTOCodeGenerator::writeMergedModules().
- //
- void setCodeGenDebugOptions(const char *opts);
-
- // Write the merged module to the file specified by the given path.
- // Return true on success.
- bool writeMergedModules(const char *path, std::string &errMsg);
-
- // Compile the merged module into a *single* object file; the path to object
- // file is returned to the caller via argument "name". Return true on
- // success.
- //
- // NOTE that it is up to the linker to remove the intermediate object file.
- // Do not try to remove the object file in LTOCodeGenerator's destructor
- // as we don't who (LTOCodeGenerator or the obj file) will last longer.
- //
- bool compile_to_file(const char **name, std::string &errMsg);
-
- // As with compile_to_file(), this function compiles the merged module into
- // single object file. Instead of returning the object-file-path to the caller
- // (linker), it brings the object to a buffer, and return the buffer to the
- // caller. This function should delete intermediate object file once its content
- // is brought to memory. Return NULL is the compilation was not successful.
- //
- const void *compile(size_t *length, std::string &errMsg);
-
-private:
- void initializeLTOPasses();
-
- bool generateObjectFile(llvm::raw_ostream &out, std::string &errMsg);
- void applyScopeRestrictions();
- void applyRestriction(llvm::GlobalValue &GV,
- std::vector<const char*> &MustPreserveList,
- llvm::SmallPtrSet<llvm::GlobalValue*, 8> &AsmUsed,
- llvm::Mangler &Mangler);
- bool determineTarget(std::string &errMsg);
-
- typedef llvm::StringMap<uint8_t> StringSet;
-
- llvm::LLVMContext &Context;
- llvm::Linker Linker;
- llvm::TargetMachine *TargetMach;
- bool EmitDwarfDebugInfo;
- bool ScopeRestrictionsDone;
- lto_codegen_model CodeModel;
- StringSet MustPreserveSymbols;
- StringSet AsmUndefinedRefs;
- llvm::MemoryBuffer *NativeObjectFile;
- std::vector<char *> CodegenOptions;
- std::string MCpu;
- std::string NativeObjectPath;
-};
-
-#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/ADT/OwningPtr.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Module.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCParser/MCAsmParser.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCTargetAsmParser.h"
-#include "llvm/MC/SubtargetFeature.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Host.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/TargetSelect.h"
-#include "llvm/Support/system_error.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-using namespace llvm;
-
-static cl::opt<bool>
-EnableFPMAD("enable-fp-mad",
- cl::desc("Enable less precise MAD instructions to be generated"),
- cl::init(false));
-
-static cl::opt<bool>
-DisableFPElim("disable-fp-elim",
- cl::desc("Disable frame pointer elimination optimization"),
- cl::init(false));
-
-static cl::opt<bool>
-EnableUnsafeFPMath("enable-unsafe-fp-math",
- cl::desc("Enable optimizations that may decrease FP precision"),
- cl::init(false));
-
-static cl::opt<bool>
-EnableNoInfsFPMath("enable-no-infs-fp-math",
- cl::desc("Enable FP math optimizations that assume no +-Infs"),
- cl::init(false));
-
-static cl::opt<bool>
-EnableNoNaNsFPMath("enable-no-nans-fp-math",
- cl::desc("Enable FP math optimizations that assume no NaNs"),
- cl::init(false));
-
-static cl::opt<bool>
-EnableHonorSignDependentRoundingFPMath("enable-sign-dependent-rounding-fp-math",
- cl::Hidden,
- cl::desc("Force codegen to assume rounding mode can change dynamically"),
- cl::init(false));
-
-static cl::opt<bool>
-GenerateSoftFloatCalls("soft-float",
- cl::desc("Generate software floating point library calls"),
- cl::init(false));
-
-static cl::opt<llvm::FloatABI::ABIType>
-FloatABIForCalls("float-abi",
- cl::desc("Choose float ABI type"),
- cl::init(FloatABI::Default),
- cl::values(
- clEnumValN(FloatABI::Default, "default",
- "Target default float ABI type"),
- clEnumValN(FloatABI::Soft, "soft",
- "Soft float ABI (implied by -soft-float)"),
- clEnumValN(FloatABI::Hard, "hard",
- "Hard float ABI (uses FP registers)"),
- clEnumValEnd));
-
-static cl::opt<llvm::FPOpFusion::FPOpFusionMode>
-FuseFPOps("fp-contract",
- cl::desc("Enable aggresive formation of fused FP ops"),
- cl::init(FPOpFusion::Standard),
- cl::values(
- clEnumValN(FPOpFusion::Fast, "fast",
- "Fuse FP ops whenever profitable"),
- clEnumValN(FPOpFusion::Standard, "on",
- "Only fuse 'blessed' FP ops."),
- clEnumValN(FPOpFusion::Strict, "off",
- "Only fuse FP ops when the result won't be effected."),
- clEnumValEnd));
-
-static cl::opt<bool>
-DontPlaceZerosInBSS("nozero-initialized-in-bss",
- cl::desc("Don't place zero-initialized symbols into bss section"),
- cl::init(false));
-
-static cl::opt<bool>
-EnableGuaranteedTailCallOpt("tailcallopt",
- cl::desc("Turn fastcc calls into tail calls by (potentially) changing ABI."),
- cl::init(false));
-
-static cl::opt<bool>
-DisableTailCalls("disable-tail-calls",
- cl::desc("Never emit tail calls"),
- cl::init(false));
-
-static cl::opt<unsigned>
-OverrideStackAlignment("stack-alignment",
- cl::desc("Override default stack alignment"),
- cl::init(0));
-
-static cl::opt<std::string>
-TrapFuncName("trap-func", cl::Hidden,
- cl::desc("Emit a call to trap function rather than a trap instruction"),
- cl::init(""));
-
-static cl::opt<bool>
-EnablePIE("enable-pie",
- cl::desc("Assume the creation of a position independent executable."),
- cl::init(false));
-
-static cl::opt<bool>
-SegmentedStacks("segmented-stacks",
- cl::desc("Use segmented stacks if possible."),
- cl::init(false));
-
-static cl::opt<bool>
-UseInitArray("use-init-array",
- cl::desc("Use .init_array instead of .ctors."),
- cl::init(false));
-
-LTOModule::LTOModule(llvm::Module *m, llvm::TargetMachine *t)
- : _module(m), _target(t),
- _context(_target->getMCAsmInfo(), _target->getRegisterInfo(), NULL),
- _mangler(_context, t) {}
-
-/// isBitcodeFile - Returns 'true' if the file (or memory contents) is LLVM
-/// bitcode.
-bool LTOModule::isBitcodeFile(const void *mem, size_t length) {
- return sys::fs::identify_magic(StringRef((const char *)mem, length)) ==
- sys::fs::file_magic::bitcode;
-}
-
-bool LTOModule::isBitcodeFile(const char *path) {
- sys::fs::file_magic type;
- if (sys::fs::identify_magic(path, type))
- return false;
- return type == sys::fs::file_magic::bitcode;
-}
-
-/// isBitcodeFileForTarget - Returns 'true' if the file (or memory contents) is
-/// LLVM bitcode for the specified triple.
-bool LTOModule::isBitcodeFileForTarget(const void *mem, size_t length,
- const char *triplePrefix) {
- MemoryBuffer *buffer = makeBuffer(mem, length);
- if (!buffer)
- return false;
- return isTargetMatch(buffer, triplePrefix);
-}
-
-bool LTOModule::isBitcodeFileForTarget(const char *path,
- const char *triplePrefix) {
- OwningPtr<MemoryBuffer> buffer;
- if (MemoryBuffer::getFile(path, buffer))
- return false;
- return isTargetMatch(buffer.take(), triplePrefix);
-}
-
-/// isTargetMatch - Returns 'true' if the memory buffer is for the specified
-/// target triple.
-bool LTOModule::isTargetMatch(MemoryBuffer *buffer, const char *triplePrefix) {
- std::string Triple = getBitcodeTargetTriple(buffer, getGlobalContext());
- delete buffer;
- return strncmp(Triple.c_str(), triplePrefix, strlen(triplePrefix)) == 0;
-}
-
-/// makeLTOModule - Create an LTOModule. N.B. These methods take ownership of
-/// the buffer.
-LTOModule *LTOModule::makeLTOModule(const char *path, std::string &errMsg) {
- OwningPtr<MemoryBuffer> buffer;
- if (error_code ec = MemoryBuffer::getFile(path, buffer)) {
- errMsg = ec.message();
- return NULL;
- }
- return makeLTOModule(buffer.take(), errMsg);
-}
-
-LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
- size_t size, std::string &errMsg) {
- return makeLTOModule(fd, path, size, 0, errMsg);
-}
-
-LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
- size_t map_size,
- off_t offset,
- std::string &errMsg) {
- OwningPtr<MemoryBuffer> buffer;
- if (error_code ec =
- MemoryBuffer::getOpenFileSlice(fd, path, buffer, map_size, offset)) {
- errMsg = ec.message();
- return NULL;
- }
- return makeLTOModule(buffer.take(), errMsg);
-}
-
-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.take(), errMsg);
-}
-
-void LTOModule::getTargetOptions(TargetOptions &Options) {
- Options.LessPreciseFPMADOption = EnableFPMAD;
- Options.NoFramePointerElim = DisableFPElim;
- Options.AllowFPOpFusion = FuseFPOps;
- Options.UnsafeFPMath = EnableUnsafeFPMath;
- Options.NoInfsFPMath = EnableNoInfsFPMath;
- Options.NoNaNsFPMath = EnableNoNaNsFPMath;
- Options.HonorSignDependentRoundingFPMathOption =
- EnableHonorSignDependentRoundingFPMath;
- Options.UseSoftFloat = GenerateSoftFloatCalls;
- if (FloatABIForCalls != FloatABI::Default)
- Options.FloatABIType = FloatABIForCalls;
- Options.NoZerosInBSS = DontPlaceZerosInBSS;
- Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
- Options.DisableTailCalls = DisableTailCalls;
- Options.StackAlignmentOverride = OverrideStackAlignment;
- Options.TrapFuncName = TrapFuncName;
- Options.PositionIndependentExecutable = EnablePIE;
- Options.EnableSegmentedStacks = SegmentedStacks;
- Options.UseInitArray = UseInitArray;
-}
-
-LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
- std::string &errMsg) {
- static bool Initialized = false;
- if (!Initialized) {
- InitializeAllTargets();
- InitializeAllTargetMCs();
- InitializeAllAsmParsers();
- Initialized = true;
- }
-
- // parse bitcode buffer
- OwningPtr<Module> m(getLazyBitcodeModule(buffer, getGlobalContext(),
- &errMsg));
- if (!m) {
- delete buffer;
- return NULL;
- }
-
- std::string TripleStr = m->getTargetTriple();
- if (TripleStr.empty())
- TripleStr = sys::getDefaultTargetTriple();
- llvm::Triple Triple(TripleStr);
-
- // find machine architecture for this module
- const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg);
- if (!march)
- return NULL;
-
- // 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.
- std::string CPU;
- if (Triple.isOSDarwin()) {
- if (Triple.getArch() == llvm::Triple::x86_64)
- CPU = "core2";
- else if (Triple.getArch() == llvm::Triple::x86)
- CPU = "yonah";
- }
- TargetOptions Options;
- getTargetOptions(Options);
- TargetMachine *target = march->createTargetMachine(TripleStr, CPU, FeatureStr,
- Options);
- LTOModule *Ret = new LTOModule(m.take(), target);
- if (Ret->parseSymbols(errMsg)) {
- delete Ret;
- return NULL;
- }
-
- return Ret;
-}
-
-/// makeBuffer - Create a MemoryBuffer from a memory range.
-MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length) {
- const char *startPtr = (const char*)mem;
- return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), "", false);
-}
-
-/// objcClassNameFromExpression - Get string that the data pointer points to.
-bool
-LTOModule::objcClassNameFromExpression(const Constant *c, std::string &name) {
- if (const ConstantExpr *ce = dyn_cast<ConstantExpr>(c)) {
- Constant *op = ce->getOperand(0);
- if (GlobalVariable *gvn = dyn_cast<GlobalVariable>(op)) {
- Constant *cn = gvn->getInitializer();
- if (ConstantDataArray *ca = dyn_cast<ConstantDataArray>(cn)) {
- if (ca->isCString()) {
- name = ".objc_class_name_" + ca->getAsCString().str();
- return true;
- }
- }
- }
- }
- return false;
-}
-
-/// addObjCClass - Parse i386/ppc ObjC class data structure.
-void LTOModule::addObjCClass(const GlobalVariable *clgv) {
- const ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
- if (!c) return;
-
- // second slot in __OBJC,__class is pointer to superclass name
- std::string superclassName;
- if (objcClassNameFromExpression(c->getOperand(1), superclassName)) {
- NameAndAttributes info;
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(superclassName);
- if (!entry.getValue().name) {
- const char *symbolName = entry.getKey().data();
- info.name = symbolName;
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- info.isFunction = false;
- info.symbol = clgv;
- entry.setValue(info);
- }
- }
-
- // third slot in __OBJC,__class is pointer to class name
- std::string className;
- if (objcClassNameFromExpression(c->getOperand(2), className)) {
- StringSet::value_type &entry = _defines.GetOrCreateValue(className);
- entry.setValue(1);
-
- NameAndAttributes info;
- info.name = entry.getKey().data();
- info.attributes = LTO_SYMBOL_PERMISSIONS_DATA |
- LTO_SYMBOL_DEFINITION_REGULAR | LTO_SYMBOL_SCOPE_DEFAULT;
- info.isFunction = false;
- info.symbol = clgv;
- _symbols.push_back(info);
- }
-}
-
-/// addObjCCategory - Parse i386/ppc ObjC category data structure.
-void LTOModule::addObjCCategory(const GlobalVariable *clgv) {
- const ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer());
- if (!c) return;
-
- // second slot in __OBJC,__category is pointer to target class name
- std::string targetclassName;
- if (!objcClassNameFromExpression(c->getOperand(1), targetclassName))
- return;
-
- NameAndAttributes info;
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(targetclassName);
-
- if (entry.getValue().name)
- return;
-
- const char *symbolName = entry.getKey().data();
- info.name = symbolName;
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- info.isFunction = false;
- info.symbol = clgv;
- entry.setValue(info);
-}
-
-/// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
-void LTOModule::addObjCClassRef(const GlobalVariable *clgv) {
- std::string targetclassName;
- if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName))
- return;
-
- NameAndAttributes info;
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(targetclassName);
- if (entry.getValue().name)
- return;
-
- const char *symbolName = entry.getKey().data();
- info.name = symbolName;
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
- info.isFunction = false;
- info.symbol = clgv;
- entry.setValue(info);
-}
-
-/// addDefinedDataSymbol - Add a data symbol as defined to the list.
-void LTOModule::addDefinedDataSymbol(const GlobalValue *v) {
- // Add to list of defined symbols.
- addDefinedSymbol(v, false);
-
- if (!v->hasSection() /* || !isTargetDarwin */)
- return;
-
- // Special case i386/ppc ObjC data structures in magic sections:
- // The issue is that the old ObjC object format did some strange
- // contortions to avoid real linker symbols. For instance, the
- // ObjC class data structure is allocated statically in the executable
- // that defines that class. That data structures contains a pointer to
- // its superclass. But instead of just initializing that part of the
- // struct to the address of its superclass, and letting the static and
- // dynamic linkers do the rest, the runtime works by having that field
- // instead point to a C-string that is the name of the superclass.
- // At runtime the objc initialization updates that pointer and sets
- // it to point to the actual super class. As far as the linker
- // knows it is just a pointer to a string. But then someone wanted the
- // linker to issue errors at build time if the superclass was not found.
- // So they figured out a way in mach-o object format to use an absolute
- // symbols (.objc_class_name_Foo = 0) and a floating reference
- // (.reference .objc_class_name_Bar) to cause the linker into erroring when
- // a class was missing.
- // The following synthesizes the implicit .objc_* symbols for the linker
- // from the ObjC data structures generated by the front end.
-
- // special case if this data blob is an ObjC class definition
- if (v->getSection().compare(0, 15, "__OBJC,__class,") == 0) {
- if (const GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
- addObjCClass(gv);
- }
- }
-
- // special case if this data blob is an ObjC category definition
- else if (v->getSection().compare(0, 18, "__OBJC,__category,") == 0) {
- if (const GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
- addObjCCategory(gv);
- }
- }
-
- // special case if this data blob is the list of referenced classes
- else if (v->getSection().compare(0, 18, "__OBJC,__cls_refs,") == 0) {
- if (const GlobalVariable *gv = dyn_cast<GlobalVariable>(v)) {
- addObjCClassRef(gv);
- }
- }
-}
-
-/// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
-void LTOModule::addDefinedFunctionSymbol(const Function *f) {
- // add to list of defined symbols
- addDefinedSymbol(f, true);
-}
-
-/// addDefinedSymbol - Add a defined symbol to the list.
-void LTOModule::addDefinedSymbol(const GlobalValue *def, bool isFunction) {
- // ignore all llvm.* symbols
- if (def->getName().startswith("llvm."))
- return;
-
- // string is owned by _defines
- SmallString<64> Buffer;
- _mangler.getNameWithPrefix(Buffer, def, false);
-
- // set alignment part log2() can have rounding errors
- uint32_t align = def->getAlignment();
- uint32_t attr = align ? countTrailingZeros(def->getAlignment()) : 0;
-
- // set permissions part
- if (isFunction) {
- attr |= LTO_SYMBOL_PERMISSIONS_CODE;
- } else {
- const GlobalVariable *gv = dyn_cast<GlobalVariable>(def);
- if (gv && gv->isConstant())
- attr |= LTO_SYMBOL_PERMISSIONS_RODATA;
- else
- attr |= LTO_SYMBOL_PERMISSIONS_DATA;
- }
-
- // set definition part
- if (def->hasWeakLinkage() || def->hasLinkOnceLinkage() ||
- def->hasLinkerPrivateWeakLinkage())
- attr |= LTO_SYMBOL_DEFINITION_WEAK;
- else if (def->hasCommonLinkage())
- attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
- else
- attr |= LTO_SYMBOL_DEFINITION_REGULAR;
-
- // set scope part
- if (def->hasHiddenVisibility())
- attr |= LTO_SYMBOL_SCOPE_HIDDEN;
- else if (def->hasProtectedVisibility())
- attr |= LTO_SYMBOL_SCOPE_PROTECTED;
- else if (def->hasExternalLinkage() || def->hasWeakLinkage() ||
- def->hasLinkOnceLinkage() || def->hasCommonLinkage() ||
- def->hasLinkerPrivateWeakLinkage())
- attr |= LTO_SYMBOL_SCOPE_DEFAULT;
- else if (def->hasLinkOnceODRAutoHideLinkage())
- attr |= LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN;
- else
- attr |= LTO_SYMBOL_SCOPE_INTERNAL;
-
- StringSet::value_type &entry = _defines.GetOrCreateValue(Buffer);
- entry.setValue(1);
-
- // fill information structure
- NameAndAttributes info;
- StringRef Name = entry.getKey();
- info.name = Name.data();
- assert(info.name[Name.size()] == '\0');
- info.attributes = attr;
- info.isFunction = isFunction;
- info.symbol = def;
-
- // add to table of symbols
- _symbols.push_back(info);
-}
-
-/// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
-/// defined list.
-void LTOModule::addAsmGlobalSymbol(const char *name,
- lto_symbol_attributes scope) {
- StringSet::value_type &entry = _defines.GetOrCreateValue(name);
-
- // only add new define if not already defined
- if (entry.getValue())
- return;
-
- entry.setValue(1);
-
- NameAndAttributes &info = _undefines[entry.getKey().data()];
-
- if (info.symbol == 0) {
- // FIXME: This is trying to take care of module ASM like this:
- //
- // module asm ".zerofill __FOO, __foo, _bar_baz_qux, 0"
- //
- // but is gross and its mother dresses it funny. Have the ASM parser give us
- // more details for this type of situation so that we're not guessing so
- // much.
-
- // fill information structure
- info.name = entry.getKey().data();
- info.attributes =
- LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope;
- info.isFunction = false;
- info.symbol = 0;
-
- // add to table of symbols
- _symbols.push_back(info);
- return;
- }
-
- if (info.isFunction)
- addDefinedFunctionSymbol(cast<Function>(info.symbol));
- else
- addDefinedDataSymbol(info.symbol);
-
- _symbols.back().attributes &= ~LTO_SYMBOL_SCOPE_MASK;
- _symbols.back().attributes |= scope;
-}
-
-/// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to the
-/// undefined list.
-void LTOModule::addAsmGlobalSymbolUndef(const char *name) {
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(name);
-
- _asm_undefines.push_back(entry.getKey().data());
-
- // we already have the symbol
- if (entry.getValue().name)
- return;
-
- uint32_t attr = LTO_SYMBOL_DEFINITION_UNDEFINED;;
- attr |= LTO_SYMBOL_SCOPE_DEFAULT;
- NameAndAttributes info;
- info.name = entry.getKey().data();
- info.attributes = attr;
- info.isFunction = false;
- info.symbol = 0;
-
- entry.setValue(info);
-}
-
-/// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet to a
-/// list to be resolved later.
-void
-LTOModule::addPotentialUndefinedSymbol(const GlobalValue *decl, bool isFunc) {
- // ignore all llvm.* symbols
- if (decl->getName().startswith("llvm."))
- return;
-
- // ignore all aliases
- if (isa<GlobalAlias>(decl))
- return;
-
- SmallString<64> name;
- _mangler.getNameWithPrefix(name, decl, false);
-
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(name);
-
- // we already have the symbol
- if (entry.getValue().name)
- return;
-
- NameAndAttributes info;
-
- info.name = entry.getKey().data();
-
- if (decl->hasExternalWeakLinkage())
- info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
- else
- info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
-
- info.isFunction = isFunc;
- info.symbol = decl;
-
- entry.setValue(info);
-}
-
-namespace {
- class RecordStreamer : public MCStreamer {
- public:
- enum State { NeverSeen, Global, Defined, DefinedGlobal, Used };
-
- private:
- StringMap<State> Symbols;
-
- void markDefined(const MCSymbol &Symbol) {
- State &S = Symbols[Symbol.getName()];
- switch (S) {
- case DefinedGlobal:
- case Global:
- S = DefinedGlobal;
- break;
- case NeverSeen:
- case Defined:
- case Used:
- S = Defined;
- break;
- }
- }
- void markGlobal(const MCSymbol &Symbol) {
- State &S = Symbols[Symbol.getName()];
- switch (S) {
- case DefinedGlobal:
- case Defined:
- S = DefinedGlobal;
- break;
-
- case NeverSeen:
- case Global:
- case Used:
- S = Global;
- break;
- }
- }
- void markUsed(const MCSymbol &Symbol) {
- State &S = Symbols[Symbol.getName()];
- switch (S) {
- case DefinedGlobal:
- case Defined:
- case Global:
- break;
-
- case NeverSeen:
- case Used:
- S = Used;
- break;
- }
- }
-
- // FIXME: mostly copied for the obj streamer.
- void AddValueSymbols(const MCExpr *Value) {
- switch (Value->getKind()) {
- case MCExpr::Target:
- // FIXME: What should we do in here?
- break;
-
- case MCExpr::Constant:
- break;
-
- case MCExpr::Binary: {
- const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
- AddValueSymbols(BE->getLHS());
- AddValueSymbols(BE->getRHS());
- break;
- }
-
- case MCExpr::SymbolRef:
- markUsed(cast<MCSymbolRefExpr>(Value)->getSymbol());
- break;
-
- case MCExpr::Unary:
- AddValueSymbols(cast<MCUnaryExpr>(Value)->getSubExpr());
- break;
- }
- }
-
- public:
- typedef StringMap<State>::const_iterator const_iterator;
-
- const_iterator begin() {
- return Symbols.begin();
- }
-
- const_iterator end() {
- return Symbols.end();
- }
-
- RecordStreamer(MCContext &Context)
- : MCStreamer(SK_RecordStreamer, Context) {}
-
- virtual void EmitInstruction(const MCInst &Inst) {
- // Scan for values.
- for (unsigned i = Inst.getNumOperands(); i--; )
- if (Inst.getOperand(i).isExpr())
- AddValueSymbols(Inst.getOperand(i).getExpr());
- }
- virtual void EmitLabel(MCSymbol *Symbol) {
- Symbol->setSection(*getCurrentSection().first);
- markDefined(*Symbol);
- }
- virtual void EmitDebugLabel(MCSymbol *Symbol) {
- EmitLabel(Symbol);
- }
- virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
- // FIXME: should we handle aliases?
- markDefined(*Symbol);
- }
- virtual bool EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute) {
- if (Attribute == MCSA_Global)
- markGlobal(*Symbol);
- return true;
- }
- virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size , unsigned ByteAlignment) {
- markDefined(*Symbol);
- }
- virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment) {
- markDefined(*Symbol);
- }
-
- virtual void EmitBundleAlignMode(unsigned AlignPow2) {}
- virtual void EmitBundleLock(bool AlignToEnd) {}
- virtual void EmitBundleUnlock() {}
-
- // Noop calls.
- virtual void ChangeSection(const MCSection *Section,
- const MCExpr *Subsection) {}
- virtual void InitToTextSection() {}
- virtual void InitSections() {}
- virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {}
- virtual void EmitThumbFunc(MCSymbol *Func) {}
- virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
- virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
- virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
- virtual void EmitCOFFSymbolStorageClass(int StorageClass) {}
- virtual void EmitCOFFSymbolType(int Type) {}
- virtual void EndCOFFSymbolDef() {}
- virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
- virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
- unsigned ByteAlignment) {}
- virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment) {}
- virtual void EmitBytes(StringRef Data) {}
- virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) {}
- virtual void EmitULEB128Value(const MCExpr *Value) {}
- virtual void EmitSLEB128Value(const MCExpr *Value) {}
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
- unsigned ValueSize,
- unsigned MaxBytesToEmit) {}
- virtual void EmitCodeAlignment(unsigned ByteAlignment,
- unsigned MaxBytesToEmit) {}
- virtual bool EmitValueToOffset(const MCExpr *Offset,
- unsigned char Value ) { return false; }
- virtual void EmitFileDirective(StringRef Filename) {}
- virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
- const MCSymbol *LastLabel,
- const MCSymbol *Label,
- unsigned PointerSize) {}
- virtual void FinishImpl() {}
- virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
- RecordProcEnd(Frame);
- }
-
- static bool classof(const MCStreamer *S) {
- return S->getKind() == SK_RecordStreamer;
- }
- };
-} // end anonymous namespace
-
-/// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
-/// defined or undefined lists.
-bool LTOModule::addAsmGlobalSymbols(std::string &errMsg) {
- const std::string &inlineAsm = _module->getModuleInlineAsm();
- if (inlineAsm.empty())
- return false;
-
- OwningPtr<RecordStreamer> Streamer(new RecordStreamer(_context));
- MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(inlineAsm);
- SourceMgr SrcMgr;
- SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
- OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
- _context, *Streamer,
- *_target->getMCAsmInfo()));
- const Target &T = _target->getTarget();
- OwningPtr<MCInstrInfo> MCII(T.createMCInstrInfo());
- OwningPtr<MCSubtargetInfo>
- STI(T.createMCSubtargetInfo(_target->getTargetTriple(),
- _target->getTargetCPU(),
- _target->getTargetFeatureString()));
- OwningPtr<MCTargetAsmParser> TAP(T.createMCAsmParser(*STI, *Parser.get(), *MCII));
- if (!TAP) {
- errMsg = "target " + std::string(T.getName()) +
- " does not define AsmParser.";
- return true;
- }
-
- Parser->setTargetParser(*TAP);
- if (Parser->Run(false))
- return true;
-
- for (RecordStreamer::const_iterator i = Streamer->begin(),
- e = Streamer->end(); i != e; ++i) {
- StringRef Key = i->first();
- RecordStreamer::State Value = i->second;
- if (Value == RecordStreamer::DefinedGlobal)
- addAsmGlobalSymbol(Key.data(), LTO_SYMBOL_SCOPE_DEFAULT);
- else if (Value == RecordStreamer::Defined)
- addAsmGlobalSymbol(Key.data(), LTO_SYMBOL_SCOPE_INTERNAL);
- else if (Value == RecordStreamer::Global ||
- Value == RecordStreamer::Used)
- addAsmGlobalSymbolUndef(Key.data());
- }
-
- return false;
-}
-
-/// isDeclaration - Return 'true' if the global value is a declaration.
-static bool isDeclaration(const GlobalValue &V) {
- if (V.hasAvailableExternallyLinkage())
- return true;
-
- if (V.isMaterializable())
- return false;
-
- return V.isDeclaration();
-}
-
-/// parseSymbols - Parse the symbols from the module and model-level ASM and add
-/// them to either the defined or undefined lists.
-bool LTOModule::parseSymbols(std::string &errMsg) {
- // add functions
- for (Module::iterator f = _module->begin(), e = _module->end(); f != e; ++f) {
- if (isDeclaration(*f))
- addPotentialUndefinedSymbol(f, true);
- else
- addDefinedFunctionSymbol(f);
- }
-
- // add data
- for (Module::global_iterator v = _module->global_begin(),
- e = _module->global_end(); v != e; ++v) {
- if (isDeclaration(*v))
- addPotentialUndefinedSymbol(v, false);
- else
- addDefinedDataSymbol(v);
- }
-
- // add asm globals
- if (addAsmGlobalSymbols(errMsg))
- return true;
-
- // add aliases
- for (Module::alias_iterator a = _module->alias_begin(),
- e = _module->alias_end(); a != e; ++a) {
- if (isDeclaration(*a->getAliasedGlobal()))
- // Is an alias to a declaration.
- addPotentialUndefinedSymbol(a, false);
- else
- addDefinedDataSymbol(a);
- }
-
- // make symbols for all undefines
- for (StringMap<NameAndAttributes>::iterator u =_undefines.begin(),
- e = _undefines.end(); u != e; ++u) {
- // If this symbol also has a definition, then don't make an undefine because
- // it is a tentative definition.
- if (_defines.count(u->getKey())) continue;
- NameAndAttributes info = u->getValue();
- _symbols.push_back(info);
- }
-
- return false;
-}
+++ /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-c/lto.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/ADT/StringMap.h"
-#include "llvm/IR/Module.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetMachine.h"
-#include <string>
-#include <vector>
-
-// Forward references to llvm classes.
-namespace llvm {
- class Function;
- class GlobalValue;
- class MemoryBuffer;
- class TargetOptions;
- class Value;
-}
-
-//===----------------------------------------------------------------------===//
-/// LTOModule - C++ class which implements the opaque lto_module_t type.
-///
-struct LTOModule {
-private:
- typedef llvm::StringMap<uint8_t> StringSet;
-
- struct NameAndAttributes {
- const char *name;
- uint32_t attributes;
- bool isFunction;
- const llvm::GlobalValue *symbol;
- };
-
- llvm::OwningPtr<llvm::Module> _module;
- llvm::OwningPtr<llvm::TargetMachine> _target;
- std::vector<NameAndAttributes> _symbols;
-
- // _defines and _undefines only needed to disambiguate tentative definitions
- StringSet _defines;
- llvm::StringMap<NameAndAttributes> _undefines;
- std::vector<const char*> _asm_undefines;
- llvm::MCContext _context;
-
- // Use mangler to add GlobalPrefix to names to match linker names.
- llvm::Mangler _mangler;
-
- LTOModule(llvm::Module *m, llvm::TargetMachine *t);
-public:
- /// isBitcodeFile - Returns 'true' if the file or memory contents is LLVM
- /// bitcode.
- static bool isBitcodeFile(const void *mem, size_t length);
- static bool isBitcodeFile(const char *path);
-
- /// isBitcodeFileForTarget - Returns 'true' if the file or memory contents
- /// is LLVM bitcode for the specified triple.
- static bool isBitcodeFileForTarget(const void *mem,
- size_t length,
- const char *triplePrefix);
- static bool isBitcodeFileForTarget(const char *path,
- const char *triplePrefix);
-
- /// makeLTOModule - Create an LTOModule. N.B. These methods take ownership
- /// of the buffer.
- static LTOModule *makeLTOModule(const char* path,
- std::string &errMsg);
- static LTOModule *makeLTOModule(int fd, const char *path,
- size_t size, std::string &errMsg);
- static LTOModule *makeLTOModule(int fd, const char *path,
- size_t map_size,
- off_t offset,
- std::string& errMsg);
- static LTOModule *makeLTOModule(const void *mem, size_t length,
- std::string &errMsg);
-
- /// getTargetTriple - Return the Module's target triple.
- const char *getTargetTriple() {
- return _module->getTargetTriple().c_str();
- }
-
- /// setTargetTriple - Set the Module's target triple.
- void setTargetTriple(const char *triple) {
- _module->setTargetTriple(triple);
- }
-
- /// getSymbolCount - Get the number of symbols
- uint32_t getSymbolCount() {
- return _symbols.size();
- }
-
- /// getSymbolAttributes - Get the attributes for a symbol at the specified
- /// index.
- lto_symbol_attributes getSymbolAttributes(uint32_t index) {
- if (index < _symbols.size())
- return lto_symbol_attributes(_symbols[index].attributes);
- return lto_symbol_attributes(0);
- }
-
- /// getSymbolName - Get the name of the symbol at the specified index.
- const char *getSymbolName(uint32_t index) {
- if (index < _symbols.size())
- return _symbols[index].name;
- return NULL;
- }
-
- /// getLLVVMModule - Return the Module.
- llvm::Module *getLLVVMModule() { return _module.get(); }
-
- /// getAsmUndefinedRefs -
- const std::vector<const char*> &getAsmUndefinedRefs() {
- return _asm_undefines;
- }
-
- /// getTargetOptions - Fill the TargetOptions object with the options
- /// specified on the command line.
- static void getTargetOptions(llvm::TargetOptions &Options);
-
-private:
- /// parseSymbols - Parse the symbols from the module and model-level ASM and
- /// add them to either the defined or undefined lists.
- bool parseSymbols(std::string &errMsg);
-
- /// addPotentialUndefinedSymbol - Add a symbol which isn't defined just yet
- /// to a list to be resolved later.
- void addPotentialUndefinedSymbol(const llvm::GlobalValue *dcl, bool isFunc);
-
- /// addDefinedSymbol - Add a defined symbol to the list.
- void addDefinedSymbol(const llvm::GlobalValue *def, bool isFunction);
-
- /// addDefinedFunctionSymbol - Add a function symbol as defined to the list.
- void addDefinedFunctionSymbol(const llvm::Function *f);
-
- /// addDefinedDataSymbol - Add a data symbol as defined to the list.
- void addDefinedDataSymbol(const llvm::GlobalValue *v);
-
- /// addAsmGlobalSymbols - Add global symbols from module-level ASM to the
- /// defined or undefined lists.
- bool addAsmGlobalSymbols(std::string &errMsg);
-
- /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the
- /// defined list.
- void addAsmGlobalSymbol(const char *, lto_symbol_attributes scope);
-
- /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to
- /// the undefined list.
- void addAsmGlobalSymbolUndef(const char *);
-
- /// addObjCClass - Parse i386/ppc ObjC class data structure.
- void addObjCClass(const llvm::GlobalVariable *clgv);
-
- /// addObjCCategory - Parse i386/ppc ObjC category data structure.
- void addObjCCategory(const llvm::GlobalVariable *clgv);
-
- /// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
- void addObjCClassRef(const llvm::GlobalVariable *clgv);
-
- /// objcClassNameFromExpression - Get string that the data pointer points
- /// to.
- bool objcClassNameFromExpression(const llvm::Constant* c, std::string &name);
-
- /// isTargetMatch - Returns 'true' if the memory buffer is for the specified
- /// target triple.
- static bool isTargetMatch(llvm::MemoryBuffer *memBuffer,
- const char *triplePrefix);
-
- /// makeLTOModule - Create an LTOModule (private version). N.B. This
- /// method takes ownership of the buffer.
- static LTOModule *makeLTOModule(llvm::MemoryBuffer *buffer,
- std::string &errMsg);
-
- /// makeBuffer - Create a MemoryBuffer from a memory range.
- static llvm::MemoryBuffer *makeBuffer(const void *mem, size_t length);
-};
-
-#endif // LTO_MODULE_H
LEVEL := ../..
LIBRARYNAME := LTO
LINK_COMPONENTS := all-targets ipo scalaropts linker bitreader bitwriter \
- mcdisassembler vectorize
+ lto mcdisassembler vectorize
LINK_LIBS_IN_SHARED := 1
SHARED_LIBRARY := 1
//===----------------------------------------------------------------------===//
#include "llvm-c/lto.h"
-#include "LTOCodeGenerator.h"
-#include "LTOModule.h"
+#include "llvm/LTO/LTOCodeGenerator.h"
+#include "llvm/LTO/LTOModule.h"
#include "llvm-c/Core.h"
+#include "llvm-c/Target.h"
// Holds most recent error string.
// *** Not thread safe ***
static std::string sLastErrorString;
+// Holds the initialization state of the LTO module.
+// *** Not thread safe ***
+static bool initialized = false;
+
+// Initialize the configured targets if they have not been initialized.
+static void lto_initialize() {
+ if (!initialized) {
+ LLVMInitializeAllTargetInfos();
+ LLVMInitializeAllTargets();
+ LLVMInitializeAllTargetMCs();
+ LLVMInitializeAllAsmParsers();
+ LLVMInitializeAllAsmPrinters();
+ LLVMInitializeAllDisassemblers();
+ initialized = true;
+ }
+}
+
/// lto_get_version - Returns a printable string.
extern const char* lto_get_version() {
return LTOCodeGenerator::getVersionString();
/// lto_module_create - 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) {
+ lto_initialize();
return LTOModule::makeLTOModule(path, sLastErrorString);
}
/// lto_module_create_from_fd - Loads an object file from disk. Returns NULL on
/// error (check lto_get_error_message() for details).
lto_module_t lto_module_create_from_fd(int fd, const char *path, size_t size) {
+ lto_initialize();
return LTOModule::makeLTOModule(fd, path, size, sLastErrorString);
}
size_t file_size,
size_t map_size,
off_t offset) {
+ lto_initialize();
return LTOModule::makeLTOModule(fd, path, map_size, offset, sLastErrorString);
}
/// lto_module_create_from_memory - 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) {
+ lto_initialize();
return LTOModule::makeLTOModule(mem, length, sLastErrorString);
}
/// lto_codegen_create - Instantiates a code generator. Returns NULL if there
/// is an error.
lto_code_gen_t lto_codegen_create(void) {
+ lto_initialize();
return new LTOCodeGenerator();
}
projects / oota-llvm.git / commitdiff