[Bug libstdc++/88101] New: Implement P0528R3, C++20 cmpxchg and padding bits

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88101

            Bug ID: 88101
           Summary: Implement P0528R3, C++20 cmpxchg and padding bits
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jason at gcc dot gnu.org
  Target Milestone: ---

Although this paper was moved by Core at the meeting, it's a change to the
library atomics clause.  Do you need compiler support for this?  It seems
fairly straightforward to handle types for which
has_unique_object_representations is false by zeroing the storage as the first
step of initialization.