[Bug middle-end/126857] Redundant bit set after bit test came positive

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126857

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

           What    |Removed                     |Added
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           Severity|normal                      |enhancement

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
There is a dup for the constant form (that is b is a constant).
For non-constant it is harder to implement.