luaS_eqlngstr
(a->tsv.tt == LUA_TSHRSTR ? eqshrstr(a, b) : luaS_eqlngstr(a, b));
LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
case LUA_TLNGSTR: return luaS_eqlngstr(rawtsvalue(t1), rawtsvalue(t2));