https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93404

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
                 CC|                            |rguenth at gcc dot gnu.org
   Target Milestone|---                         |10.0

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The init sequence for CODE/MODE is indeed weird.  I'd have expected the inits
to be merged with the previous zeroing when those args are constants
(which they usually are?).  Guess the bitfield-ness doesn't play well here.
Maybe sth for store-merging (but that runs quite late).

Definitely something for a separate bugreport with a shorter testcase.

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