[Bug tree-optimization/93131] ((a&8) == 8) && ((a&2) == 2) is not optimized to (a&(8|2)) == (8|2)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93131

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the generic version of this is:
((A & N) == CST1) & ((A & M) == CST2)

if (N&M)&CST1 == (N&M)&CST2, then
   (A&(N|M)) == (CST1|CST2)
else
  false