View Compilation Error

0_0_36333902_26194.cpp: In function 'int main()':
0_0_36333902_26194.cpp:178:55: error: expected primary-expression before ')' token
   auto x = __builtin_convertvector(t[SZ + i].sum, v2ll);
                                                       ^
0_0_36333902_26194.cpp:178:55: error: '__builtin_convertvector' was not declared in this scope
0_0_36333902_26194.cpp:179:58: error: expected primary-expression before ')' token
   t[SZ + i].sum2 = __builtin_convertvector(x * x % M, v2i);
                                                          ^