https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118572

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

           What    |Removed                     |Added
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                 CC|                            |pinskia at gcc dot gnu.org

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So we have a&0x80 !=0 (or rather a&0x80 == 0x80) and a&0xc0 == 0x80


So it optimize to a&xc0 == 0x80.

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