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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/108583] [13 Regression] wrong code with vector division
 by uint16 at -O2
Date: Tue, 31 Jan 2023 11:01:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108583

--- Comment #9 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.or=
g> ---
Are we sure this is a vectoriser vs. C vectors thing?
The equivalent vectoriser test:

void __attribute__((noipa))
f (unsigned *v)
{
  for (int i =3D 0; i < 4; ++i)
    v[i] /=3D 0xffff;
}

int
main (void)
{
  unsigned v[] =3D { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff };
  f (v);
  for (unsigned i =3D 0; i < sizeof (v) / sizeof (v[0]); i++)
    if (v[i] !=3D 0x00010001)
      __builtin_abort ();
  return 0;
}

fails in the same way for me (compiled at -O3).=