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

struct weird
{
  struct
  {
    int b;
  };

  char x;

  union
  {
    int a;
    int c;
  };
};


int test (struct weird *arg) {
  int *x = __builtin_preserve_access_index (&arg->b);
  int *y = __builtin_preserve_access_index (&arg->c);

  return *x + *y;
}


/* { dg-final { scan-assembler-times "ascii \"0:0:0.0\"\[\t \]+\[^\n\]*btf_aux_string" 1 } } */
/* { dg-final { scan-assembler-times "ascii \"0:2:1.0\"\[\t \]+\[^\n\]*btf_aux_string" 1 } } */