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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/112093] (X & Y) < X (unsigned) and (X & Y) !=
 X should produce the same code
Date: Sat, 04 Nov 2023 21:10:35 +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=3D112093

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2023-11-04
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot =
gnu.org

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(for cmp  (lt      ge      le      gt     )
     bop  (bit_and bit_and bit_ior bit_ior)
     rcmp (ne      eq      eq      ne     )
 (simplify
  (cmp (bop@2 @0 @1) @0)
  (if (tree_expr_nonnegative_p (@0)
       && (bop =3D=3D BIT_AND
           || tree_expr_nonnegative_p (@1)))
    (rcmp @2 @0))))

I have not looked into what is needed for the IOR case for
!tree_expr_nonnegative_p (@1) yet but I suspect it is similar to what I did=
 for
PR 101590.

Anyways mine.=