171     StringRef existing = pair.first->second;  in parseMerge()  local
172     if (existing != to)  in parseMerge()
173       warn(s + ": already merged into " + existing);  in parseMerge()
715     Export *existing = pair.first->second.first;  in fixupExports()  local
716     if (e == *existing || e.name != existing->name)  in fixupExports()
721     if (existing->source == ExportSource::Directives) {  in fixupExports()
722       *existing = e;  in fixupExports()
726     if (existing->source == e.source) {  in fixupExports()
727       warn(Twine("duplicate ") + exportSourceName(existing->source) +  in fixupExports()
731            Twine(" first seen in " + exportSourceName(existing->source) +  in fixupExports()
762   std::pair<StringRef, InputFile *> existing = ctx.config.mustMatch[k];  in checkFailIfMismatch()  local
763   if (!existing.first.empty() && v != existing.first) {  in checkFailIfMismatch()
766         existing.second ? toString(existing.second) : "cmd-line";  in checkFailIfMismatch()
768           existingStr + " has value " + existing.first + "\n>>> " + sourceStr +  in checkFailIfMismatch()