[Bug tree-optimization/93982] [10 Regression] Assignment incorrectly omitted by -foptimize-strlen since r10-2528

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93982

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Simplified testcase:

struct A { const char **a; };
const char *buf[5];

__attribute__((noipa)) struct A
foo (char *p)
{
  struct A r = { (const char **) p };
  r.a[0] = "12345678";
  r.a[1] = "";
  r.a[2] = "";
  r.a[3] = "";
  r.a[4] = "";
  return r;
}

int
main ()
{
  struct A r = foo ((char *) &buf[0]);
  if (!r.a[1] || r.a[1][0] != '\0')
    __builtin_abort ();
  return 0;
}