The following c loop will not enable the gcc compiler for auto-vectorization

loop_vect_v0.c

//gcc -O3 -fopt-info-vec-missed=loop_vect_v0.miss loop_vect_v0.c -o loop_vect_v0
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main() {
  
int array1[1000];
int array2[1000];
long array3[1000];
long arraySum = 0;

srand(time(NULL));

for (int i = 0; i < 1000; i++) {
        array1[i] = (rand()% 2001) - 1000;
        array2[i] = (rand()% 2001) - 1000;
        array3[i] = array1[i] + array2[i];
		arraySum += array3[i];
}
        printf("The total array sum is: %li\n", arraySum);

return 0;
}

loop_vect_v0.miss

loop_vect_v0.c:14:1: note: not vectorized: loop contains function calls or data references that cannot be analyzed
loop_vect_v0.c:12:1: note: not vectorized: not enough data-refs in basic block.
loop_vect_v0.c:16:22: note: not vectorized: not enough data-refs in basic block.
loop_vect_v0.c:14:1: note: not vectorized: not enough data-refs in basic block.
loop_vect_v0.c:20:9: note: not vectorized: not enough data-refs in basic block.