//===----------------------------------------------------------------------===//
#include "llvm/LTO/LTOModule.h"
-#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/Analysis.h"
#include "llvm/IR/Constants.h"
+#include "llvm/IR/DiagnosticPrinter.h"
#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Mangler.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/MC/MCSection.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/Object/IRObjectFile.h"
+#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.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/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Transforms/Utils/GlobalStatus.h"
+#include <system_error>
using namespace llvm;
+using namespace llvm::object;
-LTOModule::LTOModule(llvm::Module *m, llvm::TargetMachine *t)
- : _module(m), _target(t),
- _context(_target->getMCAsmInfo(), _target->getRegisterInfo(), &ObjFileInfo),
- _mangler(t->getDataLayout()) {
- ObjFileInfo.InitMCObjectFileInfo(t->getTargetTriple(),
- t->getRelocationModel(), t->getCodeModel(),
- _context);
-}
+LTOModule::LTOModule(std::unique_ptr<object::IRObjectFile> Obj,
+ llvm::TargetMachine *TM)
+ : IRFile(std::move(Obj)), _target(TM) {}
+
+LTOModule::LTOModule(std::unique_ptr<object::IRObjectFile> Obj,
+ llvm::TargetMachine *TM,
+ std::unique_ptr<LLVMContext> Context)
+ : OwnedContext(std::move(Context)), IRFile(std::move(Obj)), _target(TM) {}
+
+LTOModule::~LTOModule() {}
/// 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 void *Mem, size_t Length) {
+ ErrorOr<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer(
+ MemoryBufferRef(StringRef((const char *)Mem, Length), "<mem>"));
+ return bool(BCData);
}
-bool LTOModule::isBitcodeFile(const char *path) {
- sys::fs::file_magic type;
- if (sys::fs::identify_magic(path, type))
+bool LTOModule::isBitcodeFile(const char *Path) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
+ MemoryBuffer::getFile(Path);
+ if (!BufferOrErr)
return false;
- return type == sys::fs::file_magic::bitcode;
+
+ ErrorOr<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer(
+ BufferOrErr.get()->getMemBufferRef());
+ return bool(BCData);
}
-/// 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)
+bool LTOModule::isBitcodeForTarget(MemoryBuffer *Buffer,
+ StringRef TriplePrefix) {
+ ErrorOr<MemoryBufferRef> BCOrErr =
+ IRObjectFile::findBitcodeInMemBuffer(Buffer->getMemBufferRef());
+ if (!BCOrErr)
return false;
- return isTargetMatch(buffer, triplePrefix);
+ LLVMContext Context;
+ std::string Triple = getBitcodeTargetTriple(*BCOrErr, Context);
+ return StringRef(Triple).startswith(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);
+LTOModule *LTOModule::createFromFile(const char *path, TargetOptions options,
+ std::string &errMsg) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
+ MemoryBuffer::getFile(path);
+ if (std::error_code EC = BufferOrErr.getError()) {
+ errMsg = EC.message();
+ return nullptr;
+ }
+ std::unique_ptr<MemoryBuffer> Buffer = std::move(BufferOrErr.get());
+ return makeLTOModule(Buffer->getMemBufferRef(), options, errMsg,
+ &getGlobalContext());
}
-/// 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;
+LTOModule *LTOModule::createFromOpenFile(int fd, const char *path, size_t size,
+ TargetOptions options,
+ std::string &errMsg) {
+ return createFromOpenFileSlice(fd, path, size, 0, options, errMsg);
}
-/// makeLTOModule - Create an LTOModule. N.B. These methods take ownership of
-/// the buffer.
-LTOModule *LTOModule::makeLTOModule(const char *path, TargetOptions options,
- std::string &errMsg) {
- OwningPtr<MemoryBuffer> buffer;
- if (error_code ec = MemoryBuffer::getFile(path, buffer)) {
- errMsg = ec.message();
- return NULL;
+LTOModule *LTOModule::createFromOpenFileSlice(int fd, const char *path,
+ size_t map_size, off_t offset,
+ TargetOptions options,
+ std::string &errMsg) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr =
+ MemoryBuffer::getOpenFileSlice(fd, path, map_size, offset);
+ if (std::error_code EC = BufferOrErr.getError()) {
+ errMsg = EC.message();
+ return nullptr;
}
- return makeLTOModule(buffer.take(), options, errMsg);
+ std::unique_ptr<MemoryBuffer> Buffer = std::move(BufferOrErr.get());
+ return makeLTOModule(Buffer->getMemBufferRef(), options, errMsg,
+ &getGlobalContext());
}
-LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
- size_t size, TargetOptions options,
- std::string &errMsg) {
- return makeLTOModule(fd, path, size, 0, options, errMsg);
+LTOModule *LTOModule::createFromBuffer(const void *mem, size_t length,
+ TargetOptions options,
+ std::string &errMsg, StringRef path) {
+ return createInContext(mem, length, options, errMsg, path,
+ &getGlobalContext());
}
-LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
- size_t map_size,
- off_t offset,
- TargetOptions options,
- 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(), options, errMsg);
+LTOModule *LTOModule::createInLocalContext(const void *mem, size_t length,
+ TargetOptions options,
+ std::string &errMsg,
+ StringRef path) {
+ return createInContext(mem, length, options, errMsg, path, nullptr);
}
-LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length,
- TargetOptions options,
- std::string &errMsg, StringRef path) {
- OwningPtr<MemoryBuffer> buffer(makeBuffer(mem, length, path));
- if (!buffer)
- return NULL;
- return makeLTOModule(buffer.take(), options, errMsg);
+LTOModule *LTOModule::createInContext(const void *mem, size_t length,
+ TargetOptions options,
+ std::string &errMsg, StringRef path,
+ LLVMContext *Context) {
+ StringRef Data((const char *)mem, length);
+ MemoryBufferRef Buffer(Data, path);
+ return makeLTOModule(Buffer, options, errMsg, Context);
}
-LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
- TargetOptions options,
- std::string &errMsg) {
- // parse bitcode buffer
- ErrorOr<Module *> ModuleOrErr =
- getLazyBitcodeModule(buffer, getGlobalContext());
- if (error_code EC = ModuleOrErr.getError()) {
- errMsg = EC.message();
- delete buffer;
- return NULL;
+static std::unique_ptr<Module> parseBitcodeFileImpl(MemoryBufferRef Buffer,
+ LLVMContext &Context,
+ bool ShouldBeLazy,
+ std::string &ErrMsg) {
+
+ // Find the buffer.
+ ErrorOr<MemoryBufferRef> MBOrErr =
+ IRObjectFile::findBitcodeInMemBuffer(Buffer);
+ if (std::error_code EC = MBOrErr.getError()) {
+ ErrMsg = EC.message();
+ return nullptr;
+ }
+
+ std::function<void(const DiagnosticInfo &)> DiagnosticHandler =
+ [&ErrMsg](const DiagnosticInfo &DI) {
+ raw_string_ostream Stream(ErrMsg);
+ DiagnosticPrinterRawOStream DP(Stream);
+ DI.print(DP);
+ };
+
+ if (!ShouldBeLazy) {
+ // Parse the full file.
+ ErrorOr<std::unique_ptr<Module>> M =
+ parseBitcodeFile(*MBOrErr, Context, DiagnosticHandler);
+ if (!M)
+ return nullptr;
+ return std::move(*M);
+ }
+
+ // Parse lazily.
+ std::unique_ptr<MemoryBuffer> LightweightBuf =
+ MemoryBuffer::getMemBuffer(*MBOrErr, false);
+ ErrorOr<std::unique_ptr<Module>> M =
+ getLazyBitcodeModule(std::move(LightweightBuf), Context,
+ DiagnosticHandler, true /*ShouldLazyLoadMetadata*/);
+ if (!M)
+ return nullptr;
+ return std::move(*M);
+}
+
+LTOModule *LTOModule::makeLTOModule(MemoryBufferRef Buffer,
+ TargetOptions options, std::string &errMsg,
+ LLVMContext *Context) {
+ std::unique_ptr<LLVMContext> OwnedContext;
+ if (!Context) {
+ OwnedContext = llvm::make_unique<LLVMContext>();
+ Context = OwnedContext.get();
}
- OwningPtr<Module> m(ModuleOrErr.get());
- std::string TripleStr = m->getTargetTriple();
+ // If we own a context, we know this is being used only for symbol
+ // extraction, not linking. Be lazy in that case.
+ std::unique_ptr<Module> M = parseBitcodeFileImpl(
+ Buffer, *Context,
+ /* ShouldBeLazy */ static_cast<bool>(OwnedContext), errMsg);
+ if (!M)
+ return nullptr;
+
+ 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;
+ return nullptr;
// construct LTOModule, hand over ownership of module and target
SubtargetFeatures Features;
CPU = "core2";
else if (Triple.getArch() == llvm::Triple::x86)
CPU = "yonah";
+ else if (Triple.getArch() == llvm::Triple::aarch64)
+ CPU = "cyclone";
}
TargetMachine *target = march->createTargetMachine(TripleStr, CPU, FeatureStr,
options);
- m->materializeAllPermanently();
+ M->setDataLayout(target->createDataLayout());
- LTOModule *Ret = new LTOModule(m.take(), target);
+ std::unique_ptr<object::IRObjectFile> IRObj(
+ new object::IRObjectFile(Buffer, std::move(M)));
- // We need a MCContext set up in order to get mangled names of private
- // symbols. It is a bit odd that we need to report uses and definitions
- // of private symbols, but it does look like ld64 expects to be informed
- // of at least the ones with an 'l' prefix.
- MCContext &Context = Ret->_context;
- const TargetLoweringObjectFile &TLOF =
- target->getTargetLowering()->getObjFileLowering();
- const_cast<TargetLoweringObjectFile &>(TLOF).Initialize(Context, *target);
+ LTOModule *Ret;
+ if (OwnedContext)
+ Ret = new LTOModule(std::move(IRObj), target, std::move(OwnedContext));
+ else
+ Ret = new LTOModule(std::move(IRObj), target);
if (Ret->parseSymbols(errMsg)) {
delete Ret;
- return NULL;
+ return nullptr;
}
Ret->parseMetadata();
}
/// Create a MemoryBuffer from a memory range with an optional name.
-MemoryBuffer *LTOModule::makeBuffer(const void *mem, size_t length,
- StringRef name) {
+std::unique_ptr<MemoryBuffer>
+LTOModule::makeBuffer(const void *mem, size_t length, StringRef name) {
const char *startPtr = (const char*)mem;
return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), name, false);
}
Constant *cn = gvn->getInitializer();
if (ConstantDataArray *ca = dyn_cast<ConstantDataArray>(cn)) {
if (ca->isCString()) {
- name = ".objc_class_name_" + ca->getAsCString().str();
+ name = (".objc_class_name_" + ca->getAsCString()).str();
return true;
}
}
// 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;
+ auto IterBool =
+ _undefines.insert(std::make_pair(superclassName, NameAndAttributes()));
+ if (IterBool.second) {
+ NameAndAttributes &info = IterBool.first->second;
+ info.name = IterBool.first->first().data();
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);
+ auto Iter = _defines.insert(className).first;
NameAndAttributes info;
- info.name = entry.getKey().data();
+ info.name = Iter->first().data();
info.attributes = LTO_SYMBOL_PERMISSIONS_DATA |
LTO_SYMBOL_DEFINITION_REGULAR | LTO_SYMBOL_SCOPE_DEFAULT;
info.isFunction = false;
if (!objcClassNameFromExpression(c->getOperand(1), targetclassName))
return;
- NameAndAttributes info;
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(targetclassName);
+ auto IterBool =
+ _undefines.insert(std::make_pair(targetclassName, NameAndAttributes()));
- if (entry.getValue().name)
+ if (!IterBool.second)
return;
- const char *symbolName = entry.getKey().data();
- info.name = symbolName;
+ NameAndAttributes &info = IterBool.first->second;
+ info.name = IterBool.first->first().data();
info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED;
info.isFunction = false;
info.symbol = clgv;
- entry.setValue(info);
}
/// addObjCClassRef - Parse i386/ppc ObjC class list data structure.
if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName))
return;
- NameAndAttributes info;
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(targetclassName);
- if (entry.getValue().name)
+ auto IterBool =
+ _undefines.insert(std::make_pair(targetclassName, NameAndAttributes()));
+
+ if (!IterBool.second)
return;
- const char *symbolName = entry.getKey().data();
- info.name = symbolName;
+ NameAndAttributes &info = IterBool.first->second;
+ info.name = IterBool.first->first().data();
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) {
+void LTOModule::addDefinedDataSymbol(const object::BasicSymbolRef &Sym) {
+ SmallString<64> Buffer;
+ {
+ raw_svector_ostream OS(Buffer);
+ Sym.printName(OS);
+ }
+
+ const GlobalValue *V = IRFile->getSymbolGV(Sym.getRawDataRefImpl());
+ addDefinedDataSymbol(Buffer.c_str(), V);
+}
+
+void LTOModule::addDefinedDataSymbol(const char *Name, const GlobalValue *v) {
// Add to list of defined symbols.
- addDefinedSymbol(v, false);
+ addDefinedSymbol(Name, v, false);
if (!v->hasSection() /* || !isTargetDarwin */)
return;
// 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) {
+ std::string Section = v->getSection();
+ if (Section.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) {
+ else if (Section.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) {
+ else if (Section.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);
-}
-
-static bool canBeHidden(const GlobalValue *GV) {
- // FIXME: this is duplicated with another static function in AsmPrinter.cpp
- GlobalValue::LinkageTypes L = GV->getLinkage();
-
- if (L != GlobalValue::LinkOnceODRLinkage)
- return false;
-
- if (GV->hasUnnamedAddr())
- return true;
-
- // If it is a non constant variable, it needs to be uniqued across shared
- // objects.
- if (const GlobalVariable *Var = dyn_cast<GlobalVariable>(GV)) {
- if (!Var->isConstant())
- return false;
+void LTOModule::addDefinedFunctionSymbol(const object::BasicSymbolRef &Sym) {
+ SmallString<64> Buffer;
+ {
+ raw_svector_ostream OS(Buffer);
+ Sym.printName(OS);
}
- GlobalStatus GS;
- if (GlobalStatus::analyzeGlobal(GV, GS))
- return false;
-
- return !GS.IsCompared;
+ const Function *F =
+ cast<Function>(IRFile->getSymbolGV(Sym.getRawDataRefImpl()));
+ addDefinedFunctionSymbol(Buffer.c_str(), F);
}
-/// 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;
- _target->getTargetLowering()->getNameWithPrefix(Buffer, def, _mangler);
+void LTOModule::addDefinedFunctionSymbol(const char *Name, const Function *F) {
+ // add to list of defined symbols
+ addDefinedSymbol(Name, F, true);
+}
+void LTOModule::addDefinedSymbol(const char *Name, const GlobalValue *def,
+ bool isFunction) {
// set alignment part log2() can have rounding errors
uint32_t align = def->getAlignment();
- uint32_t attr = align ? countTrailingZeros(def->getAlignment()) : 0;
+ uint32_t attr = align ? countTrailingZeros(align) : 0;
// set permissions part
if (isFunction) {
}
// set definition part
- if (def->hasWeakLinkage() || def->hasLinkOnceLinkage() ||
- def->hasLinkerPrivateWeakLinkage())
+ if (def->hasWeakLinkage() || def->hasLinkOnceLinkage())
attr |= LTO_SYMBOL_DEFINITION_WEAK;
else if (def->hasCommonLinkage())
attr |= LTO_SYMBOL_DEFINITION_TENTATIVE;
attr |= LTO_SYMBOL_DEFINITION_REGULAR;
// set scope part
- if (def->hasHiddenVisibility())
+ if (def->hasLocalLinkage())
+ // Ignore visibility if linkage is local.
+ attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+ else if (def->hasHiddenVisibility())
attr |= LTO_SYMBOL_SCOPE_HIDDEN;
else if (def->hasProtectedVisibility())
attr |= LTO_SYMBOL_SCOPE_PROTECTED;
- else if (canBeHidden(def))
+ else if (canBeOmittedFromSymbolTable(def))
attr |= LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN;
- else if (def->hasExternalLinkage() || def->hasWeakLinkage() ||
- def->hasLinkOnceLinkage() || def->hasCommonLinkage() ||
- def->hasLinkerPrivateWeakLinkage())
- attr |= LTO_SYMBOL_SCOPE_DEFAULT;
else
- attr |= LTO_SYMBOL_SCOPE_INTERNAL;
+ attr |= LTO_SYMBOL_SCOPE_DEFAULT;
- StringSet::value_type &entry = _defines.GetOrCreateValue(Buffer);
- entry.setValue(1);
+ if (def->hasComdat())
+ attr |= LTO_SYMBOL_COMDAT;
+
+ if (isa<GlobalAlias>(def))
+ attr |= LTO_SYMBOL_ALIAS;
+
+ auto Iter = _defines.insert(Name).first;
// fill information structure
NameAndAttributes info;
- StringRef Name = entry.getKey();
- info.name = Name.data();
- assert(info.name[Name.size()] == '\0');
+ StringRef NameRef = Iter->first();
+ info.name = NameRef.data();
+ assert(info.name[NameRef.size()] == '\0');
info.attributes = attr;
info.isFunction = isFunction;
info.symbol = def;
/// defined list.
void LTOModule::addAsmGlobalSymbol(const char *name,
lto_symbol_attributes scope) {
- StringSet::value_type &entry = _defines.GetOrCreateValue(name);
+ auto IterBool = _defines.insert(name);
// only add new define if not already defined
- if (entry.getValue())
+ if (!IterBool.second)
return;
- entry.setValue(1);
-
- NameAndAttributes &info = _undefines[entry.getKey().data()];
+ NameAndAttributes &info = _undefines[IterBool.first->first().data()];
- if (info.symbol == 0) {
+ if (info.symbol == nullptr) {
// FIXME: This is trying to take care of module ASM like this:
//
// module asm ".zerofill __FOO, __foo, _bar_baz_qux, 0"
// much.
// fill information structure
- info.name = entry.getKey().data();
+ info.name = IterBool.first->first().data();
info.attributes =
LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope;
info.isFunction = false;
- info.symbol = 0;
+ info.symbol = nullptr;
// add to table of symbols
_symbols.push_back(info);
}
if (info.isFunction)
- addDefinedFunctionSymbol(cast<Function>(info.symbol));
+ addDefinedFunctionSymbol(info.name, cast<Function>(info.symbol));
else
- addDefinedDataSymbol(info.symbol);
+ addDefinedDataSymbol(info.name, 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);
+ auto IterBool = _undefines.insert(std::make_pair(name, NameAndAttributes()));
- _asm_undefines.push_back(entry.getKey().data());
+ _asm_undefines.push_back(IterBool.first->first().data());
// we already have the symbol
- if (entry.getValue().name)
+ if (!IterBool.second)
return;
- uint32_t attr = LTO_SYMBOL_DEFINITION_UNDEFINED;;
+ uint32_t attr = LTO_SYMBOL_DEFINITION_UNDEFINED;
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
- NameAndAttributes info;
- info.name = entry.getKey().data();
+ NameAndAttributes &info = IterBool.first->second;
+ info.name = IterBool.first->first().data();
info.attributes = attr;
info.isFunction = false;
- info.symbol = 0;
-
- entry.setValue(info);
+ info.symbol = nullptr;
}
-/// 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;
-
+/// Add a symbol which isn't defined just yet to a list to be resolved later.
+void LTOModule::addPotentialUndefinedSymbol(const object::BasicSymbolRef &Sym,
+ bool isFunc) {
SmallString<64> name;
- _target->getTargetLowering()->getNameWithPrefix(name, decl, _mangler);
+ {
+ raw_svector_ostream OS(name);
+ Sym.printName(OS);
+ }
- StringMap<NameAndAttributes>::value_type &entry =
- _undefines.GetOrCreateValue(name);
+ auto IterBool = _undefines.insert(std::make_pair(name, NameAndAttributes()));
// we already have the symbol
- if (entry.getValue().name)
+ if (!IterBool.second)
return;
- NameAndAttributes info;
+ NameAndAttributes &info = IterBool.first->second;
- info.name = entry.getKey().data();
+ info.name = IterBool.first->first().data();
+
+ const GlobalValue *decl = IRFile->getSymbolGV(Sym.getRawDataRefImpl());
if (decl->hasExternalWeakLinkage())
info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
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;
+/// 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) {
+ for (auto &Sym : IRFile->symbols()) {
+ const GlobalValue *GV = IRFile->getSymbolGV(Sym.getRawDataRefImpl());
+ uint32_t Flags = Sym.getFlags();
+ if (Flags & object::BasicSymbolRef::SF_FormatSpecific)
+ continue;
+
+ bool IsUndefined = Flags & object::BasicSymbolRef::SF_Undefined;
+
+ if (!GV) {
+ SmallString<64> Buffer;
+ {
+ raw_svector_ostream OS(Buffer);
+ Sym.printName(OS);
}
+ const char *Name = Buffer.c_str();
+
+ if (IsUndefined)
+ addAsmGlobalSymbolUndef(Name);
+ else if (Flags & object::BasicSymbolRef::SF_Global)
+ addAsmGlobalSymbol(Name, LTO_SYMBOL_SCOPE_DEFAULT);
+ else
+ addAsmGlobalSymbol(Name, LTO_SYMBOL_SCOPE_INTERNAL);
+ continue;
}
- public:
- typedef StringMap<State>::const_iterator const_iterator;
-
- const_iterator begin() {
- return Symbols.begin();
+ auto *F = dyn_cast<Function>(GV);
+ if (IsUndefined) {
+ addPotentialUndefinedSymbol(Sym, F != nullptr);
+ continue;
}
- const_iterator end() {
- return Symbols.end();
- }
-
- RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
-
- virtual void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) {
- // 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);
+ if (F) {
+ addDefinedFunctionSymbol(Sym);
+ continue;
}
- 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 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);
+ if (isa<GlobalVariable>(GV)) {
+ addDefinedDataSymbol(Sym);
+ continue;
}
- };
-} // 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);
+ assert(isa<GlobalAlias>(GV));
+ addDefinedDataSymbol(Sym);
}
// make symbols for all undefines
/// parseMetadata - Parse metadata from the module
void LTOModule::parseMetadata() {
+ raw_string_ostream OS(LinkerOpts);
+
// Linker Options
- if (Value *Val = _module->getModuleFlag("Linker Options")) {
+ if (Metadata *Val = getModule().getModuleFlag("Linker Options")) {
MDNode *LinkerOptions = cast<MDNode>(Val);
for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) {
MDNode *MDOptions = cast<MDNode>(LinkerOptions->getOperand(i));
for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) {
MDString *MDOption = cast<MDString>(MDOptions->getOperand(ii));
- StringRef Op = _linkeropt_strings.
- GetOrCreateValue(MDOption->getString()).getKey();
- StringRef DepLibName = _target->getTargetLowering()->
- getObjFileLowering().getDepLibFromLinkerOpt(Op);
- if (!DepLibName.empty())
- _deplibs.push_back(DepLibName.data());
- else if (!Op.empty())
- _linkeropts.push_back(Op.data());
+ OS << " " << MDOption->getString();
}
}
}
+ // Globals
+ Mangler Mang;
+ for (const NameAndAttributes &Sym : _symbols) {
+ if (!Sym.symbol)
+ continue;
+ _target->getObjFileLowering()->emitLinkerFlagsForGlobal(OS, Sym.symbol,
+ Mang);
+ }
+
// Add other interesting metadata here.
}
projects / oota-llvm.git / blobdiff