191         (Header.ModTime && File->getModificationTime() != *Header.ModTime))  in findHeader()
315   } else if (Header.HasBuiltinHeader && !Header.Size && !Header.ModTime) {  in resolveHeader()
328     if (!Header.Size && !Header.ModTime)  in resolveHeader()
1231   if ((Header.Size || Header.ModTime) && !Header.IsUmbrella &&  in addUnresolvedHeader()
1235     if (Header.ModTime)  in addUnresolvedHeader()
1236       LazyHeadersByModTime[*Header.ModTime].push_back(Mod);  in addUnresolvedHeader()
1269   const auto ModTime = File ? (*File)->getModificationTime() : 0;  in resolveHeaderDirectives()  local
1272     if (File && ((Header.ModTime && Header.ModTime != ModTime) ||  in resolveHeaderDirectives()
2451       enum Attribute { Size, ModTime, Unknown };  in parseHeaderDecl()  enumerator
2456                   .Case("mtime", ModTime)  in parseHeaderDecl()
2471       case ModTime:  in parseHeaderDecl()
2472         if (Header.ModTime)  in parseHeaderDecl()
2480         Header.ModTime = Tok.getInteger();  in parseHeaderDecl()