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From: "zhendong.su at inf dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111727] [14 Regression] wrong code at -O3 on
 x86_64-linux-gnu
Date: Fri, 13 Oct 2023 06:31:12 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: needs-bisection, wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111727

--- Comment #2 from Zhendong Su <zhendong.su at inf dot ethz.ch> ---
Another similar/related test:

[553] % gcctk -O2 small.c; ./a.out
[554] %=20
[554] % gcctk -O3 small.c
[555] % ./a.out
Aborted
[556] % cat small.c
int a, b;
int main() {
  for (; a < 4; a +=3D 2)
    if (a > 2)
      while (b++);
        ;
  if (a !=3D 4)
    __builtin_abort();
  return 0;
}=