[Bug rtl-optimization/35309] Late struct expansion leads to missing PRE

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35309

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
THe original testcase in comment #0 is now fixed but the following is not:
struct A {
  int f[16];
} ag, ag2,ag3;


struct A foo(int n)
{
   if (n)
   {
     ag2 = ag;
   }

   return ag;
}