TM_EQ
case OP_EQ: tm = TM_EQ; break;
lua_assert(event <= TM_EQ);
tm = get_equalTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable, TM_EQ);
tm = get_equalTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);