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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/107137] (unsigned)-(int)(bool_var) should be
 optimized to -(unsigned)bool_var
Date: Fri, 01 Sep 2023 16:26:37 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: missed-optimization, patch
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
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Message-ID: <bug-107137-4-FViaHA0P4T@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107137

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Solving this one is easier, just going with:
/* (nop_outer_cast)-(inner_cast)var -> -(outer_cast)(var)
   if var is smaller in precision. */
(simplify
 (convert (negate:s@1 (convert:s @0)))
 (if (INTEGRAL_TYPE_P (type)
      && tree_nop_conversion_p (type, TREE_TYPE (@1))
      && TYPE_PRECISION (type) > TYPE_PRECISION (TREE_TYPE (@0)))
    (negate (convert @0))))=