re PR libstdc++/13480 (bits/atomicity.h:56: warning: read-write constraint does…

re PR libstdc++/13480 (bits/atomicity.h:56: warning: read-write constraint does not allow a register)

2003-12-24  Andrew Pinski  <pinskia@physics.uc.edu>

        PR libstdc++/13480
        * config/cpu/i486/atomicity.h: Split up read-write memory operand.

From-SVN: r75016

libstdc++-v3/ChangeLog

+2003-12-24  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR libstdc++/13480
+	* config/cpu/i486/atomicity.h: Split up read-write memory operand.
+
 2003-12-23  Benjamin Kosnik  <bkoz@redhat.com>
 
 	* include/ext/new_allocator.h (new_allocator): Proper allocator class.

libstdc++-v3/config/cpu/i386/atomicity.h

@@ -52,8 +52,9 @@ __exchange_and_add(volatile _Atomic_word* __mem, int __val)
   /* obtain the atomic exchange/add spin lock */
   do {
     __asm__ __volatile__ ("xchg{l} {%0,%1|%1,%0}"
-			  : "+m" (__Atomicity_lock<0>::_S_atomicity_lock),
-			    "+r" (__tmp));
+			  : "m" (__Atomicity_lock<0>::_S_atomicity_lock),
+			    "+r" (__tmp)
+                          : "m" (__Atomicity_lock<0>::_S_atomicity_lock));
   } while (__tmp);
 
   __result = *__mem;