[Bug target/71310] Bitfields cause load hit store with smaller store and larger load

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71310

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

           What    |Removed                     |Added
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           Keywords|                            |missed-optimization

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
bit-field-lowering avoids this by lowering the store to a RMW of
the DECL_BIT_FIELD_REPRESENTATIVE and the load to a read of it plus a bit
extraction from the loaded word (so it ends up as a store after a load).