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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/111151] [12/13/14 Regression] Wrong code at -O0 on
 x86_64-pc-linux-gnu
Date: Fri, 22 Mar 2024 19:15:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111151

--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The following testcase at least reproduces the unsigned multiplication issu=
e,
but doesn't reproduce the signed multiplication nor division by -1.
int
main ()
{
  unsigned a =3D (1U + __INT_MAX__) / 2U;
  unsigned b =3D 1U;
  unsigned c =3D (a * 2U > b * 2U ? a * 2U : b * 2U) * 2U;
  if (c !=3D 0U)
    __builtin_abort ();
  int d =3D (-__INT_MAX__ - 1) / 2;
  int e =3D 10;
  int f =3D (d * 2 > e * 2 ? d * 2 : e * 2) * 6;
  if (f !=3D 120)
    __builtin_abort ();
  int g =3D (-__INT_MAX__ - 1) / 2;
  int h =3D 0;
  int i =3D (g * 2 > h * 2 ? g * 2 : h * 2) / -1;
  if (i !=3D 0)
    __builtin_abort ();
}=