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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/90087] Suboptimal codegen for x < 0 ? x -
 INT_MIN : x
Date: Tue, 16 May 2023 02:55:10 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D90087

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
THis way with type_min and type_max filled out correctly.

(simplify
 (cond (lt @0 integer_zero_p) (minus @0 INTEGER_CST@1) @0)
 (if (TYPE_SIGNED (type) && wi::to_widest(@0) =3D=3D type_min(@0))
  (bit_ior @0 { build_int_cst (type_max(type), type); } )))

Note I think TYPE_PRECISION needs to be a power of 2 but I could be wrong .=
..=