185         (Header.ModTime && File->getModificationTime() != *Header.ModTime))  in findHeader()
272   } else if (Header.HasBuiltinHeader && !Header.Size && !Header.ModTime) {  in resolveHeader()
285     if (!Header.Size && !Header.ModTime)  in resolveHeader()
1183   if ((Header.Size || Header.ModTime) && !Header.IsUmbrella &&  in addUnresolvedHeader()
1187     if (Header.ModTime)  in addUnresolvedHeader()
1188       LazyHeadersByModTime[*Header.ModTime].push_back(Mod);  in addUnresolvedHeader()
1221   const auto ModTime = File ? File.value()->getModificationTime() : 0;  in resolveHeaderDirectives()  local
1224     if (File && ((Header.ModTime && Header.ModTime != ModTime) ||  in resolveHeaderDirectives()
2361       enum Attribute { Size, ModTime, Unknown };  in parseHeaderDecl()  enumerator
2366                   .Case("mtime", ModTime)  in parseHeaderDecl()
2381       case ModTime:  in parseHeaderDecl()
2382         if (Header.ModTime)  in parseHeaderDecl()
2390         Header.ModTime = Tok.getInteger();  in parseHeaderDecl()