gcc/testsuite/gcc.target/bpf/core-builtin-3.c

/* { dg-do compile } */
/* { dg-options "-O0 -dA -gbtf -mco-re" } */

struct T {
  int a;
  int b;
  struct U {
    int c;
    struct V {
      int d;
      int e[4];
      int f;
    } v;
  } u;
};

void func (struct T * foo)
{
  /* Access string: "0:2:1:1:3" */
  int *x = __builtin_preserve_access_index (&(foo->u.v.e[3]));

  *x = 17;
}

/* { dg-final { scan-assembler-times "ascii \"0:2:1:1:3.0\"\[\t \]+\[^\n\]*btf_aux_string" 1 } } */
/* { dg-final { scan-assembler-times "bpfcr_type" 1 } } */