#include <stdio.h>
#include <stdint.h>
uint8_t k[6][3];
int a(char b, int c) {
  char d[] = {2, 4, 0, b, 77};
  char *e = d, *g = &e[c], *h = d;
  int f = 0;
  while (h < g) {
    f++;
    while (*h++ & 128)
      ;
  }
  return f;
}
uint8_t l();
static int64_t m() {
  if (l()) {
    uint8_t *n = &k[1][1];
    *n = 50;
  }
  return 0;
}
uint8_t l() { return a(-59, 5) - 4; }
int main() {
  int i, j;
  for (i = 0; i < 6; i++)
    for (j = 0; j < 3; j++)
      k[i][j] = 0;
  m();
  printf("%d\n", k[1][1]);
}

$ gcc-13 test.c && ./a.out
0
$ bisheng/clang -O0 test.c && ./a.out
0
$ bisheng/clang -O1 test.c && ./a.out
0
$ bisheng/clang -O2 test.c && ./a.out
50
$ bisheng/clang -O3 test.c && ./a.out
50
$ bisheng/clang -Os test.c && ./a.out
50

$ bisheng/clang --version
BiSheng Enterprise 4.0.0.B014 clang version 17.0.6 (0ac87bc45325)
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /root/compilers/BiShengCompiler-4.0.0-aarch64-linux/bin