[Bug target/62109] New: __gthr_i486_lock_cmp_xchg missing clobber

[gccbugzilla at limegreensocks dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62109

            Bug ID: 62109
           Summary: __gthr_i486_lock_cmp_xchg missing clobber
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gccbugzilla at limegreensocks dot com

Created attachment 33302
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33302&action=edit
Update __gthr_i486_lock_cmp_xchg to add memory clobber

InterlockedCompareExchange is an implicit memory barrier.  Such being the case,
the asm needs to use the "memory" clobber.