[Bug tree-optimization/83518] [8/9 Regression] Missing optimization: useless instructions should be dropped

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83518

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah.  It is

  <bb 2> [local count: 178992762]:
  arr = *.LC0;
  arr[0] = 5;
  vect__56.15_75 = MEM <vector(2) int> [(int *)&arr];

I'll fix that (well, I'll try).