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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/98954] ((X << CST0) & CST1) == 0 is not
 optimized to 0 == (X & (CST1 >> CST0))
Date: Wed, 01 Dec 2021 00:54:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98954

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D64992

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is actually the general case of PR 64992 where CST1 in that case is ju=
st a
mask of all 1s.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D64992#c8=