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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/96692] Failure to optimize xor+or+xor to
 andnot+xor
Date: Tue, 18 Aug 2020 22:12:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96692

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
          Component|tree-optimization           |rtl-optimization

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This transformation should only happen if there is an andnot instruction.
For an example if there is no andnot instruction, there will be 3 dependent
instruction while in the first case, there are two independent instructions
followed by one dependent ones.=