[Bug tree-optimization/66364] poor optimization of packed structs containing bitfields

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66364

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

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The reason why the patch for PR 55658 didn't have any effect here is because by
the time get_best_mode is called, bitregion_start and bitregion_end are set to
0 because they don't get passed down.

So if we do lowering of the bitfield early on, then we should be able to get
the correct behavior ...
Double checking that.