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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/114121] wrong code with _BitInt() arithmetics
 at -O2
Date: Mon, 26 Feb 2024 18:42:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114121

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
As an aside we at -O3 has:
  _87 =3D .USUBC (_30, 3, 0);
  _93 =3D IMAGPART_EXPR <_87>;
  _88 =3D .USUBC (0, 0, _93);
  _29 =3D IMAGPART_EXPR <_88>;
  _187 =3D .USUBC (0, 0, _29);
  _217 =3D IMAGPART_EXPR <_187>;
  _218 =3D .USUBC (0, 0, _217);
  _214 =3D IMAGPART_EXPR <_218>;
  _213 =3D .USUBC (0, 0, _214);
  _212 =3D IMAGPART_EXPR <_213>;
  _200 =3D .USUBC (0, 0, _212);
  _34 =3D IMAGPART_EXPR <_200>;
  _35 =3D .USUBC (0, 0, _34);
  _36 =3D IMAGPART_EXPR <_35>;
  _39 =3D .USUBC (0, 0, _36);
  _40 =3D REALPART_EXPR <_39>;
  _2 =3D (signed long) _40;
  _77 =3D _2 < 0;

isn't `.USUBC (0, 0, _93);` just Complex<-_93, _93!=3D0> ? Or did I misunde=
rstand
USUBC ?=