[Bug tree-optimization/125896] load common does not support non-only MEM_REF-refences

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125896

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Some more complex cases:
```
struct s2
{
  bool t[10];
};

bool f1(struct s2 *a, struct s2 *c, bool b)
{
  bool t;
  if (b)
    t = a->t[4];
  else
    t = a->t[5];
  return t;
}

bool f2(struct s2 *a, struct s2 *c, bool b, int d, int e)
{
  bool t;
  if (b)
    t = a->t[d];
  else
    t = a->t[e];
  return t;
}
```