https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103660

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 58915
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58915&action=edit
scalar gimple testcases

Note f2 is not optimized either.

It should be simple as:
(simplify
 (op:c
  (cnd @0 @00 integer_zero_p)
  (cnd @0 integer_zero_p @01))
 (cnd @0 @00 @01))

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