http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52080
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
AssignedTo|unassigned at gcc dot |rguenth at gcc dot gnu.org
|gnu.org |
--- Comment #12 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-21
11:58:00 UTC ---
Created attachment 26712
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26712
candidate patch
Here is a candidate patch (it ICEs one Ada testcase, see PR52134). It enforces
the C++11 memory model (as far as bitfields are concerned) upon everyone and
builds on the machinery that was implemented for it (changing the
implementation
for when we compute "an underlying object" and permanently store it, to make
it possible to use this information for optimization purposes).
It fixes the related PR48124 as well.
It's an invasive change that will change code generation on STRICT_ALIGNMENT
platforms quite severely for bitfield accesses. So it is not an appropriate
fix for GCC 4.7 at this point of the development cycyle, nor would it be
appropriate to backport it.
Queued for GCC 4.8.
