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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111696] [11/12/13/14 Regression] Spurious
 -Wstringop-overflow
Date: Wed, 04 Oct 2023 22:50:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111696

--- 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 =3D &last_14(D)->s;
  memcpy (_11, &cur.s, 24);


After:
  vectp.7_19 =3D &accum_13(D)->sD.4831.aD.4827[0];
...
  vectp.10_9 =3D &last_14(D)->sD.4831.aD.4827[0];
...
  # .MEM_26 =3D VDEF <.MEM_12(D)>
  MEM <vector(2) long unsigned intD.17> [(long unsigned intD.17 *)vectp.7_1=
9] =3D
vect__5.13_24;
  # .MEM_17 =3D VDEF <.MEM_26>
  MEM <unsigned charD.31[24]> [(charD.11 * {ref-all})vectp.10_9] =3D MEM
<unsigned charD.31[24]> [(charD.11 * {ref-all})&curD.4832];=