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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/106892] [11/12/13 Regression] Wrong code at -O3 on
 x86_64-linux-gnu since r11-963-g80d6f89e78fc3b77
Date: Fri, 09 Sep 2022 08:31:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106892

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the inline just has the return undefined in the unreachable path.  We can
make the inlined functions static (cleans up post-IPA dumps) and disable IPA
for j:

int a, b, c, d, e;
int f[8];
static int g() {
  while (a)
    a >>=3D 4;
  return 0;
}
static int h(int i) {
  if (i >=3D '0')
    return i - '0';
  //__builtin_unreachable ();
}
void __attribute__((noipa)) j(int i) {
  for (b =3D 2; g() <=3D 7; b++)
    if (i) {
      for (; e <=3D 7; e++)
        for (c =3D 1; c <=3D 7; c++) {
          d =3D h(b + '0');
          f[-d + 4] ^=3D 3;
        }
      return;
    }
}
int main() {
  j(1);
  if (f[2] !=3D 0)
    __builtin_abort ();
}=