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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107212] [11/12/13 Regression] Wrong
 vectorizer code since r11-718-gc735929a2503a7d0
Date: Tue, 11 Oct 2022 08:44:41 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107212

--- Comment #3 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
Hmm, have a test-case that is miscompiled since r10-4200-gb7ff7cef5005721e:

$ cat pr107212.c
int sum_1 =3D 0;

int main() {
  unsigned int tab[6][2] =3D {{150, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0,=
 0}};

  int sum_0 =3D 0;

  for (int t =3D 0; t < 6; t++) {
    sum_0 +=3D tab[t][0];
    sum_1 +=3D tab[t][0];
  }

  if (sum_0 < 100 || sum_0 > 200)
    __builtin_abort();
  return 0;
}

$ gcc pr107212.c -O3 -std=3Dc99 && ./a.out
Aborted (core dumped)=