static bool linkFiles(const char *argv0, LLVMContext &Context, Linker &L,
const cl::list<std::string> &Files,
unsigned Flags) {
// Filter out flags that don't apply to the first file we load.
unsigned ApplicableFlags = Flags & Linker::Flags::OverrideFromSrc;
for (const auto &File : Files) {
std::unique_ptr<Module> M = loadFile(argv0, File, Context);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << File << "'\n";
return false;
}
if (verifyModule(*M, &errs())) {
errs() << argv0 << ": " << File << ": error: input module is broken!\n";
return false;
}
if (Verbose)
errs() << "Linking in '" << File << "'\n";
if (L.linkInModule(M.get(), ApplicableFlags))
return false;
// All linker flags apply to linking of subsequent files.
ApplicableFlags = Flags;
}
return true;
}
static bool linkFiles(const char *argv0, LLVMContext &Context, Linker &L,
const cl::list<std::string> &Files,
unsigned Flags) {
// Filter out flags that don't apply to the first file we load.
unsigned ApplicableFlags = Flags & Linker::Flags::OverrideFromSrc;
for (const auto &File : Files) {
std::unique_ptr<Module> M = loadFile(argv0, File, Context);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << File << "'\n";
return false;
}
// Note that when ODR merging types cannot verify input files in here When
// doing that debug metadata in the src module might already be pointing to
// the destination.
if (DisableDITypeMap && verifyModule(*M, &errs())) {
errs() << argv0 << ": " << File << ": error: input module is broken!\n";
return false;
}
// If a module summary index is supplied, load it so linkInModule can treat
// local functions/variables as exported and promote if necessary.
if (!SummaryIndex.empty()) {
std::unique_ptr<ModuleSummaryIndex> Index =
ExitOnErr(llvm::getModuleSummaryIndexForFile(SummaryIndex));
// Conservatively mark all internal values as promoted, since this tool
// does not do the ThinLink that would normally determine what values to
// promote.
for (auto &I : *Index) {
for (auto &S : I.second) {
if (GlobalValue::isLocalLinkage(S->linkage()))
S->setLinkage(GlobalValue::ExternalLinkage);
}
}
// Promotion
if (renameModuleForThinLTO(*M, *Index))
return true;
}
if (Verbose)
errs() << "Linking in '" << File << "'\n";
if (L.linkInModule(std::move(M), ApplicableFlags))
return false;
// All linker flags apply to linking of subsequent files.
ApplicableFlags = Flags;
}
return true;
}
static bool linkFiles(const char *argv0, LLVMContext &Context, Linker &L,
const cl::list<std::string> &Files,
unsigned Flags) {
// Filter out flags that don't apply to the first file we load.
unsigned ApplicableFlags = Flags & Linker::Flags::OverrideFromSrc;
for (const auto &File : Files) {
std::unique_ptr<Module> M = loadFile(argv0, File, Context);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << File << "'\n";
return false;
}
if (verifyModule(*M, &errs())) {
errs() << argv0 << ": " << File << ": error: input module is broken!\n";
return false;
}
// If a function index is supplied, load it so linkInModule can treat
// local functions/variables as exported and promote if necessary.
std::unique_ptr<FunctionInfoIndex> Index;
if (!FunctionIndex.empty()) {
ErrorOr<std::unique_ptr<FunctionInfoIndex>> IndexOrErr =
llvm::getFunctionIndexForFile(FunctionIndex, diagnosticHandler);
std::error_code EC = IndexOrErr.getError();
if (EC) {
errs() << EC.message() << '\n';
return false;
}
Index = std::move(IndexOrErr.get());
}
if (Verbose)
errs() << "Linking in '" << File << "'\n";
if (L.linkInModule(std::move(M), ApplicableFlags, Index.get()))
return false;
// All linker flags apply to linking of subsequent files.
ApplicableFlags = Flags;
// If requested for testing, preserve modules by releasing them from
// the unique_ptr before the are freed. This can help catch any
// cross-module references from e.g. unneeded metadata references
// that aren't properly set to null but instead mapped to the source
// module version. The bitcode writer will assert if it finds any such
// cross-module references.
if (PreserveModules)
M.release();
}
return true;
}
static bool linkFiles(const char *argv0, LLVMContext &Context, Linker &L,
const cl::list<std::string> &Files,
unsigned Flags) {
// Filter out flags that don't apply to the first file we load.
unsigned ApplicableFlags = Flags & Linker::Flags::OverrideFromSrc;
for (const auto &File : Files) {
std::unique_ptr<Module> M = loadFile(argv0, File, Context);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << File << "'\n";
return false;
}
// Note that when ODR merging types cannot verify input files in here When
// doing that debug metadata in the src module might already be pointing to
// the destination.
if (DisableDITypeMap && verifyModule(*M, &errs())) {
errs() << argv0 << ": " << File << ": error: input module is broken!\n";
return false;
}
// If a module summary index is supplied, load it so linkInModule can treat
// local functions/variables as exported and promote if necessary.
if (!SummaryIndex.empty()) {
ErrorOr<std::unique_ptr<ModuleSummaryIndex>> IndexOrErr =
llvm::getModuleSummaryIndexForFile(SummaryIndex, diagnosticHandler);
std::error_code EC = IndexOrErr.getError();
if (EC) {
errs() << EC.message() << '\n';
return false;
}
auto Index = std::move(IndexOrErr.get());
// Promotion
if (renameModuleForThinLTO(*M, *Index))
return true;
}
if (Verbose)
errs() << "Linking in '" << File << "'\n";
if (L.linkInModule(std::move(M), ApplicableFlags))
return false;
// All linker flags apply to linking of subsequent files.
ApplicableFlags = Flags;
}
return true;
}
/// Import any functions requested via the -import option.
static bool importFunctions(const char *argv0, LLVMContext &Context,
Linker &L) {
StringMap<std::unique_ptr<DenseMap<unsigned, MDNode *>>>
ModuleToTempMDValsMap;
for (const auto &Import : Imports) {
// Identify the requested function and its bitcode source file.
size_t Idx = Import.find(':');
if (Idx == std::string::npos) {
errs() << "Import parameter bad format: " << Import << "\n";
return false;
}
std::string FunctionName = Import.substr(0, Idx);
std::string FileName = Import.substr(Idx + 1, std::string::npos);
// Load the specified source module.
std::unique_ptr<Module> M = loadFile(argv0, FileName, Context, false);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << FileName << "'\n";
return false;
}
if (verifyModule(*M, &errs())) {
errs() << argv0 << ": " << FileName
<< ": error: input module is broken!\n";
return false;
}
Function *F = M->getFunction(FunctionName);
if (!F) {
errs() << "Ignoring import request for non-existent function "
<< FunctionName << " from " << FileName << "\n";
continue;
}
// We cannot import weak_any functions without possibly affecting the
// order they are seen and selected by the linker, changing program
// semantics.
if (F->hasWeakAnyLinkage()) {
errs() << "Ignoring import request for weak-any function " << FunctionName
<< " from " << FileName << "\n";
continue;
}
if (Verbose)
errs() << "Importing " << FunctionName << " from " << FileName << "\n";
std::unique_ptr<FunctionInfoIndex> Index;
if (!FunctionIndex.empty()) {
ErrorOr<std::unique_ptr<FunctionInfoIndex>> IndexOrErr =
llvm::getFunctionIndexForFile(FunctionIndex, diagnosticHandler);
std::error_code EC = IndexOrErr.getError();
if (EC) {
errs() << EC.message() << '\n';
return false;
}
Index = std::move(IndexOrErr.get());
}
// Save the mapping of value ids to temporary metadata created when
// importing this function. If we have already imported from this module,
// add new temporary metadata to the existing mapping.
auto &TempMDVals = ModuleToTempMDValsMap[FileName];
if (!TempMDVals)
TempMDVals = llvm::make_unique<DenseMap<unsigned, MDNode *>>();
// Link in the specified function.
DenseSet<const GlobalValue *> FunctionsToImport;
FunctionsToImport.insert(F);
if (L.linkInModule(std::move(M), Linker::Flags::None, Index.get(),
&FunctionsToImport, TempMDVals.get()))
return false;
}
// Now link in metadata for all modules from which we imported functions.
for (StringMapEntry<std::unique_ptr<DenseMap<unsigned, MDNode *>>> &SME :
ModuleToTempMDValsMap) {
// Load the specified source module.
std::unique_ptr<Module> M = loadFile(argv0, SME.getKey(), Context, true);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << SME.getKey() << "'\n";
return false;
}
if (verifyModule(*M, &errs())) {
errs() << argv0 << ": " << SME.getKey()
<< ": error: input module is broken!\n";
return false;
}
// Link in all necessary metadata from this module.
if (L.linkInMetadata(*M, SME.getValue().get()))
return false;
}
return true;
}
/// Import any functions requested via the -import option.
static bool importFunctions(const char *argv0, LLVMContext &Context,
Linker &L) {
if (SummaryIndex.empty())
return true;
std::unique_ptr<ModuleSummaryIndex> Index =
ExitOnErr(llvm::getModuleSummaryIndexForFile(SummaryIndex));
// Map of Module -> List of globals to import from the Module
std::map<StringRef, DenseSet<const GlobalValue *>> ModuleToGlobalsToImportMap;
auto ModuleLoader = [&Context](const char *argv0,
const std::string &Identifier) {
return loadFile(argv0, Identifier, Context, false);
};
ModuleLazyLoaderCache ModuleLoaderCache(ModuleLoader);
for (const auto &Import : Imports) {
// Identify the requested function and its bitcode source file.
size_t Idx = Import.find(':');
if (Idx == std::string::npos) {
errs() << "Import parameter bad format: " << Import << "\n";
return false;
}
std::string FunctionName = Import.substr(0, Idx);
std::string FileName = Import.substr(Idx + 1, std::string::npos);
// Load the specified source module.
auto &SrcModule = ModuleLoaderCache(argv0, FileName);
if (verifyModule(SrcModule, &errs())) {
errs() << argv0 << ": " << FileName
<< ": error: input module is broken!\n";
return false;
}
Function *F = SrcModule.getFunction(FunctionName);
if (!F) {
errs() << "Ignoring import request for non-existent function "
<< FunctionName << " from " << FileName << "\n";
continue;
}
// We cannot import weak_any functions without possibly affecting the
// order they are seen and selected by the linker, changing program
// semantics.
if (F->hasWeakAnyLinkage()) {
errs() << "Ignoring import request for weak-any function " << FunctionName
<< " from " << FileName << "\n";
continue;
}
if (Verbose)
errs() << "Importing " << FunctionName << " from " << FileName << "\n";
auto &Entry = ModuleToGlobalsToImportMap[SrcModule.getModuleIdentifier()];
Entry.insert(F);
ExitOnErr(F->materialize());
}
// Do the actual import of globals now, one Module at a time
for (auto &GlobalsToImportPerModule : ModuleToGlobalsToImportMap) {
// Get the module for the import
auto &GlobalsToImport = GlobalsToImportPerModule.second;
std::unique_ptr<Module> SrcModule =
ModuleLoaderCache.takeModule(GlobalsToImportPerModule.first);
assert(&Context == &SrcModule->getContext() && "Context mismatch");
// If modules were created with lazy metadata loading, materialize it
// now, before linking it (otherwise this will be a noop).
ExitOnErr(SrcModule->materializeMetadata());
UpgradeDebugInfo(*SrcModule);
// Linkage Promotion and renaming
if (renameModuleForThinLTO(*SrcModule, *Index, &GlobalsToImport))
return true;
// Instruct the linker to not automatically import linkonce defintion.
unsigned Flags = Linker::Flags::DontForceLinkLinkonceODR;
if (L.linkInModule(std::move(SrcModule), Flags, &GlobalsToImport))
return false;
}
return true;
}
/// Import any functions requested via the -import option.
static bool importFunctions(const char *argv0, LLVMContext &Context,
Linker &L) {
for (const auto &Import : Imports) {
// Identify the requested function and its bitcode source file.
size_t Idx = Import.find(':');
if (Idx == std::string::npos) {
errs() << "Import parameter bad format: " << Import << "\n";
return false;
}
std::string FunctionName = Import.substr(0, Idx);
std::string FileName = Import.substr(Idx + 1, std::string::npos);
// Load the specified source module.
std::unique_ptr<Module> M = loadFile(argv0, FileName, Context);
if (!M.get()) {
errs() << argv0 << ": error loading file '" << FileName << "'\n";
return false;
}
if (verifyModule(*M, &errs())) {
errs() << argv0 << ": " << FileName
<< ": error: input module is broken!\n";
return false;
}
Function *F = M->getFunction(FunctionName);
if (!F) {
errs() << "Ignoring import request for non-existent function "
<< FunctionName << " from " << FileName << "\n";
continue;
}
// We cannot import weak_any functions without possibly affecting the
// order they are seen and selected by the linker, changing program
// semantics.
if (F->hasWeakAnyLinkage()) {
errs() << "Ignoring import request for weak-any function " << FunctionName
<< " from " << FileName << "\n";
continue;
}
if (Verbose)
errs() << "Importing " << FunctionName << " from " << FileName << "\n";
std::unique_ptr<FunctionInfoIndex> Index;
if (!FunctionIndex.empty()) {
ErrorOr<std::unique_ptr<FunctionInfoIndex>> IndexOrErr =
llvm::getFunctionIndexForFile(FunctionIndex, diagnosticHandler);
std::error_code EC = IndexOrErr.getError();
if (EC) {
errs() << EC.message() << '\n';
return false;
}
Index = std::move(IndexOrErr.get());
}
// Link in the specified function.
DenseSet<const GlobalValue *> FunctionsToImport;
FunctionsToImport.insert(F);
if (L.linkInModule(*M, Linker::Flags::None, Index.get(),
&FunctionsToImport))
return false;
}
return true;
}
