[Bug target/70308] memset generates rep stosl instead of rep stosq

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70308

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
          Component|middle-end                  |target

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  /* Even if the string operation call is cold, we still might spend a lot
     of time processing large blocks.  */
  if (optimize_function_for_size_p (cfun)
      || (optimize_insn_for_size_p ()
          && (max_size < 256
              || (expected_size != -1 && expected_size < 256))))
    optimize_for_speed = false;
  else
    optimize_for_speed = true;
  cost = optimize_for_speed ? ix86_cost : &ix86_size_cost;

Somewhere in decide_alg decides rep_4byte vs rep_8byte for optimize for size.
So this is a target issue.