A Program for Simulating the Rolling of 2 Dice in C (How to fix my incorrect output?)

I have to roll two dice 36,000 times and use a one-dimensional array to tally the number of times each number appears(2-12, with 7 being the most frequent sum and 2 and 12 the least frequent sums). My output just comes out with the whole table being 0's. What am I doing wrong?

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int diceRoll(int die1, int die2, int tally[]);

int main(void) {

  int x;
  int y;
  int z[13] = {0};
  int sums = diceRoll(x, y, z);

  srand(time(NULL));

    for (int i = 2; i <= 12; i++)
    {
       printf("%3d%12d\n", i,sums);
       sums += sums;
    }
    printf( "\nTotal number of rolls is %d",sums );
    return 0;
}

int diceRoll(int die1, int die2, int tally[]) {   

  for(int i = 1; i <= 36000; i++) {
      die1 = 1 + rand() % 6;
      die2 = 1 + rand() % 6; 
      tally[die1 + die2]++;
  }
  return 0;
}```