475     auto *LinksInto = &linksAt(Idx1);  in mergeDirect()  local
479     while (LinksInto->hasAbove() && LinksFrom->hasAbove()) {  in mergeDirect()
480       LinksInto = &linksAt(LinksInto->getAbove());  in mergeDirect()
485       LinksInto->setAbove(LinksFrom->getAbove());  in mergeDirect()
486       auto &NewAbove = linksAt(LinksInto->getAbove());  in mergeDirect()
487       NewAbove.setBelow(LinksInto->Number);  in mergeDirect()
496     while (LinksInto->hasBelow() && LinksFrom->hasBelow()) {  in mergeDirect()
498       LinksInto->setAttrs(FromAttrs);  in mergeDirect()
503       LinksFrom->remapTo(LinksInto->Number);  in mergeDirect()
505       LinksInto = &linksAt(LinksInto->getBelow());  in mergeDirect()
509       LinksInto->setBelow(LinksFrom->getBelow());  in mergeDirect()
510       auto &NewBelow = linksAt(LinksInto->getBelow());  in mergeDirect()
511       NewBelow.setAbove(LinksInto->Number);  in mergeDirect()
514     LinksInto->setAttrs(LinksFrom->getAttrs());  in mergeDirect()
515     LinksFrom->remapTo(LinksInto->Number);  in mergeDirect()