https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89435
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
It's exactly the same underlying issue: the combiner first eliminates an AND
(or an equivalent ZERO_EXTEND) between 2 instructions as redundant, which is OK
in isolation, but IRA (combine_and_move_insns) later combines again the same 2
instructions without using the WORD_REGISTER_OPERATIONS semantics used in the
combiner.
*** This bug has been marked as a duplicate of bug 89795 ***
