[Bug tree-optimization/77956] [7 Regression] ICE in insert_debug_temp_for_var_def with -g and -O2

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77956

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
$ cat tc.c
xfig_wiggly_yend ()
{
  int a = 1;
  for (;;)
    {
      a = abs (a - 1);
      fprintf (a, xfig_wiggly_yend);
    }
}