[Bug middle-end/111696] [11/12/13/14 Regression] Spurious -Wstringop-overflow

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111696

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The vectorizer has not much to do with the warning issue except for the IR
change into FRE.

Before fre5:
  _11 = &last_14(D)->s;
  memcpy (_11, &cur.s, 24);


After:
  vectp.7_19 = &accum_13(D)->sD.4831.aD.4827[0];
...
  vectp.10_9 = &last_14(D)->sD.4831.aD.4827[0];
...
  # .MEM_26 = VDEF <.MEM_12(D)>
  MEM <vector(2) long unsigned intD.17> [(long unsigned intD.17 *)vectp.7_19] =
vect__5.13_24;
  # .MEM_17 = VDEF <.MEM_26>
  MEM <unsigned charD.31[24]> [(charD.11 * {ref-all})vectp.10_9] = MEM
<unsigned charD.31[24]> [(charD.11 * {ref-all})&curD.4832];