#include "llvm/LTO/LTOModule.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/Analysis.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Metadata.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/MC/SubtargetFeature.h"
-#include "llvm/Object/RecordStreamer.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/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) {}
/// 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;
-}
-/// 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);
+ ErrorOr<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer(
+ BufferOrErr.get()->getMemBufferRef());
+ return bool(BCData);
}
-bool LTOModule::isBitcodeFileForTarget(const char *path,
- const char *triplePrefix) {
- std::unique_ptr<MemoryBuffer> buffer;
- if (MemoryBuffer::getFile(path, buffer))
+bool LTOModule::isBitcodeForTarget(MemoryBuffer *Buffer,
+ StringRef TriplePrefix) {
+ ErrorOr<MemoryBufferRef> BCOrErr =
+ IRObjectFile::findBitcodeInMemBuffer(Buffer->getMemBufferRef());
+ if (!BCOrErr)
return false;
- return isTargetMatch(buffer.release(), 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;
+ std::string Triple = getBitcodeTargetTriple(*BCOrErr, getGlobalContext());
+ return StringRef(Triple).startswith(TriplePrefix);
}
-/// makeLTOModule - Create an LTOModule. N.B. These methods take ownership of
-/// the buffer.
-LTOModule *LTOModule::makeLTOModule(const char *path, TargetOptions options,
- std::string &errMsg) {
- std::unique_ptr<MemoryBuffer> buffer;
- if (std::error_code ec = MemoryBuffer::getFile(path, buffer)) {
- errMsg = ec.message();
+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;
}
- return makeLTOModule(buffer.release(), options, errMsg);
+ std::unique_ptr<MemoryBuffer> Buffer = std::move(BufferOrErr.get());
+ return makeLTOModule(Buffer->getMemBufferRef(), options, errMsg);
}
-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::createFromOpenFile(int fd, const char *path, size_t size,
+ TargetOptions options,
+ std::string &errMsg) {
+ return createFromOpenFileSlice(fd, path, size, 0, options, errMsg);
}
-LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
- size_t map_size,
- off_t offset,
- TargetOptions options,
- std::string &errMsg) {
- std::unique_ptr<MemoryBuffer> buffer;
- if (std::error_code ec =
- MemoryBuffer::getOpenFileSlice(fd, path, buffer, map_size, offset)) {
- errMsg = ec.message();
+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.release(), options, errMsg);
+ std::unique_ptr<MemoryBuffer> Buffer = std::move(BufferOrErr.get());
+ return makeLTOModule(Buffer->getMemBufferRef(), options, errMsg);
}
-LTOModule *LTOModule::makeLTOModule(const void *mem, size_t length,
- TargetOptions options,
- std::string &errMsg, StringRef path) {
- std::unique_ptr<MemoryBuffer> buffer(makeBuffer(mem, length, path));
- if (!buffer)
- return nullptr;
- return makeLTOModule(buffer.release(), options, errMsg);
+LTOModule *LTOModule::createFromBuffer(const void *mem, size_t length,
+ TargetOptions options,
+ std::string &errMsg, StringRef path) {
+ StringRef Data((const char *)mem, length);
+ MemoryBufferRef Buffer(Data, path);
+ return makeLTOModule(Buffer, options, errMsg);
}
-LTOModule *LTOModule::makeLTOModule(MemoryBuffer *buffer,
+LTOModule *LTOModule::makeLTOModule(MemoryBufferRef Buffer,
TargetOptions options,
std::string &errMsg) {
- // parse bitcode buffer
- ErrorOr<Module *> ModuleOrErr =
- getLazyBitcodeModule(buffer, getGlobalContext());
- if (std::error_code EC = ModuleOrErr.getError()) {
+ ErrorOr<MemoryBufferRef> MBOrErr =
+ IRObjectFile::findBitcodeInMemBuffer(Buffer);
+ if (std::error_code EC = MBOrErr.getError()) {
errMsg = EC.message();
- delete buffer;
return nullptr;
}
- std::unique_ptr<Module> m(ModuleOrErr.get());
+ ErrorOr<Module *> MOrErr = parseBitcodeFile(*MBOrErr, getGlobalContext());
+ if (std::error_code EC = MOrErr.getError()) {
+ errMsg = EC.message();
+ return nullptr;
+ }
+ std::unique_ptr<Module> M(MOrErr.get());
- std::string TripleStr = m->getTargetTriple();
+ std::string TripleStr = M->getTargetTriple();
if (TripleStr.empty())
TripleStr = sys::getDefaultTargetTriple();
llvm::Triple Triple(TripleStr);
CPU = "core2";
else if (Triple.getArch() == llvm::Triple::x86)
CPU = "yonah";
- else if (Triple.getArch() == llvm::Triple::arm64 ||
- Triple.getArch() == llvm::Triple::aarch64)
+ else if (Triple.getArch() == llvm::Triple::aarch64)
CPU = "cyclone";
}
TargetMachine *target = march->createTargetMachine(TripleStr, CPU, FeatureStr,
options);
- m->materializeAllPermanently();
+ M->setDataLayout(target->getSubtargetImpl()->getDataLayout());
- LTOModule *Ret = new LTOModule(m.release(), 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 = new LTOModule(std::move(IRObj), target);
if (Ret->parseSymbols(errMsg)) {
delete Ret;
}
/// 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);
}
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;
}
}
-/// 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->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(align) : 0;
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
attr |= LTO_SYMBOL_SCOPE_DEFAULT;
- StringSet::value_type &entry = _defines.GetOrCreateValue(Buffer);
+ StringSet::value_type &entry = _defines.GetOrCreateValue(Name);
entry.setValue(1);
// fill information structure
NameAndAttributes info;
- StringRef Name = entry.getKey();
- info.name = Name.data();
- assert(info.name[Name.size()] == '\0');
+ StringRef NameRef = entry.getKey();
+ info.name = NameRef.data();
+ assert(info.name[NameRef.size()] == '\0');
info.attributes = attr;
info.isFunction = isFunction;
info.symbol = def;
}
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;
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;
-
+/// 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->getNameWithPrefix(name, decl, _mangler);
+ {
+ raw_svector_ostream OS(name);
+ Sym.printName(OS);
+ }
StringMap<NameAndAttributes>::value_type &entry =
_undefines.GetOrCreateValue(name);
info.name = entry.getKey().data();
+ const GlobalValue *decl = IRFile->getSymbolGV(Sym.getRawDataRefImpl());
+
if (decl->hasExternalWeakLinkage())
info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF;
else
entry.setValue(info);
}
-/// 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;
-
- std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(_context));
- MemoryBuffer *Buffer = MemoryBuffer::getMemBuffer(inlineAsm);
- SourceMgr SrcMgr;
- SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
- std::unique_ptr<MCAsmParser> Parser(
- createMCAsmParser(SrcMgr, _context, *Streamer, *_target->getMCAsmInfo()));
- const Target &T = _target->getTarget();
- std::unique_ptr<MCInstrInfo> MCII(T.createMCInstrInfo());
- std::unique_ptr<MCSubtargetInfo> STI(T.createMCSubtargetInfo(
- _target->getTargetTriple(), _target->getTargetCPU(),
- _target->getTargetFeatureString()));
- std::unique_ptr<MCTargetAsmParser> TAP(
- T.createMCAsmParser(*STI, *Parser.get(), *MCII,
- _target->Options.MCOptions));
- if (!TAP) {
- errMsg = "target " + std::string(T.getName()) +
- " does not define AsmParser.";
- return true;
- }
-
- Parser->setTargetParser(*TAP);
- if (Parser->Run(false))
- return true;
-
- for (auto &KV : *Streamer) {
- StringRef Key = KV.first();
- RecordStreamer::State Value = KV.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);
- }
+ 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;
+ }
- // 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);
- }
+ auto *F = dyn_cast<Function>(GV);
+ if (IsUndefined) {
+ addPotentialUndefinedSymbol(Sym, F != nullptr);
+ continue;
+ }
- // add asm globals
- if (addAsmGlobalSymbols(errMsg))
- return true;
+ if (F) {
+ addDefinedFunctionSymbol(Sym);
+ continue;
+ }
+
+ if (isa<GlobalVariable>(GV)) {
+ addDefinedDataSymbol(Sym);
+ continue;
+ }
- // add aliases
- for (const auto &Alias : _module->aliases())
- addDefinedDataSymbol(&Alias);
+ assert(isa<GlobalAlias>(GV));
+ addDefinedDataSymbol(Sym);
+ }
// make symbols for all undefines
for (StringMap<NameAndAttributes>::iterator u =_undefines.begin(),
/// parseMetadata - Parse metadata from the module
void LTOModule::parseMetadata() {
// Linker Options
- if (Value *Val = _module->getModuleFlag("Linker Options")) {
+ if (Value *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));
MDString *MDOption = cast<MDString>(MDOptions->getOperand(ii));
StringRef Op = _linkeropt_strings.
GetOrCreateValue(MDOption->getString()).getKey();
- StringRef DepLibName = _target->getTargetLowering()->
- getObjFileLowering().getDepLibFromLinkerOpt(Op);
+ StringRef DepLibName = _target->getSubtargetImpl()
+ ->getTargetLowering()
+ ->getObjFileLowering()
+ .getDepLibFromLinkerOpt(Op);
if (!DepLibName.empty())
_deplibs.push_back(DepLibName.data());
else if (!Op.empty())
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