[Bug c++/31307] New: Interaction between x86_64 builtin function and inline functions causes poor code

["michael dot meissner at amd dot com" <gcc-bugzilla at gcc dot gnu dot org>]

If you compile the attached code with optimization on a 4.1.x system it will
generate a store into a stack temporary in the middle of the loop that is never
used.  If you compile the code with -DUSE_MACRO where it uses macros instead of
inline functions, it will generate the correct code without the extra store. 
It is still a bug in the 4.3 mainline with a compiler built on March 30th.


-- 
           Summary: Interaction between x86_64 builtin function and inline
                    functions causes poor code
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: michael dot meissner at amd dot com
 GCC build triplet: x86_64-redhat-linux
  GCC host triplet: x86_64-redhat-linux
GCC target triplet: x86_64-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31307