191         (Header.ModTime && File->getModificationTime() != *Header.ModTime))  in findHeader()
275   } else if (Header.HasBuiltinHeader && !Header.Size && !Header.ModTime) {  in resolveHeader()
288     if (!Header.Size && !Header.ModTime)  in resolveHeader()
1182   if ((Header.Size || Header.ModTime) && !Header.IsUmbrella &&  in addUnresolvedHeader()
1186     if (Header.ModTime)  in addUnresolvedHeader()
1187       LazyHeadersByModTime[*Header.ModTime].push_back(Mod);  in addUnresolvedHeader()
1220   const auto ModTime = File ? (*File)->getModificationTime() : 0;  in resolveHeaderDirectives()  local
1223     if (File && ((Header.ModTime && Header.ModTime != ModTime) ||  in resolveHeaderDirectives()
2395       enum Attribute { Size, ModTime, Unknown };  in parseHeaderDecl()  enumerator
2400                   .Case("mtime", ModTime)  in parseHeaderDecl()
2415       case ModTime:  in parseHeaderDecl()
2416         if (Header.ModTime)  in parseHeaderDecl()
2424         Header.ModTime = Tok.getInteger();  in parseHeaderDecl()