PR other/51165
        * trans-mem.c (requires_barrier): Call may_be_aliased.
testsuite/
        PR other/51165
        * gcc.dg/tm/memopt-3.c: Remove xfail.
        * gcc.dg/tm/memopt-4.c: Remove xfail.
        * gcc.dg/tm/memopt-5.c: Remove xfail.
        * gcc.dg/tm/memopt-7.c: Remove xfail.

From-SVN: r183242