[PATCH] Fix PRs 52080, 52097 and 48124, rewrite bitfield expansion, enable the C++ memory model wrt bitfields everywhere

[Eric Botcazou]

> The patch looks reasonable - can we compute this backward from the
> result of the outer get_inner_reference call and the outermost
> field-decl though?  Or make get_inner_reference compute that while
> analyzing the full reference and return a flag?  OTOH it shouldn't
> be too expensive.

There are a lot of calls to get_inner_reference throughout the compiler though.
And it is cheap if you compare it with the 4.7 code, which essentially does the 
same processing for _every_ field in the record (and even if the record object 
isn't a handled_component_p).

-- 
Eric Botcazou