152     } else if (auto *undef = dyn_cast<Undefined>(s)) {  in addDefined()
228     replaceSymbol<Undefined>(s, name, file, refState,  in addUndefined()
236   else if (auto *undefined = dyn_cast<Undefined>(s))  in addUndefined()  local
237     undefined->refState = std::max(undefined->refState, refState);  in addUndefined()
269     } else if (auto *undefined = dyn_cast<Undefined>(s)) {  in addDylib()  local
270       refState = undefined->refState;  in addDylib()
277   if (wasInserted || isa<Undefined>(s) ||  in addDylib()
299   } else if (isa<Undefined>(s)) {  in addLazyArchive()
317   } else if (isa<Undefined>(s)) {  in addLazyObject()
348 static Defined *createBoundarySymbol(const Undefined &sym) {  in createBoundarySymbol()
354 static void handleSectionBoundarySymbol(const Undefined &sym, StringRef segSect,  in handleSectionBoundarySymbol()
394 static void handleSegmentBoundarySymbol(const Undefined &sym, StringRef segName,  in handleSegmentBoundarySymbol()
403 // Try to find a definition for an undefined symbol.
405 static bool recoverFromUndefinedSymbol(const Undefined &sym) {  in recoverFromUndefinedSymbol()
435   // Handle -undefined.  in recoverFromUndefinedSymbol()
461 MapVector<const Undefined *, UndefinedDiag> undefs;
494 // Suggest an alternative spelling of an "undefined symbol" diagnostic. Returns
497 static const Symbol *getAlternativeSpelling(const Undefined &sym,  in getAlternativeSpelling()
514     // If in the symbol table and not undefined.  in getAlternativeSpelling()
516       if (dyn_cast<Undefined>(s) == nullptr)  in getAlternativeSpelling()
523   // correction candidates and suggests the one that exists as a non-undefined  in getAlternativeSpelling()
565     if (dyn_cast<Undefined>(sym) == nullptr &&  in getAlternativeSpelling()
608 static void reportUndefinedSymbol(const Undefined &sym,  in reportUndefinedSymbol()
611   std::string message = "undefined symbol";  in reportUndefinedSymbol()
660     assert(false && "diagnostics make sense for -undefined error|warning only");  in reportUndefinedSymbol()
673 void macho::treatUndefinedSymbol(const Undefined &sym, StringRef source) {  in treatUndefinedSymbol()
680 void macho::treatUndefinedSymbol(const Undefined &sym, const InputSection *isec,  in treatUndefinedSymbol()