[Bug tree-optimization/81356] __builtin_strcpy is not good for copying an empty string on aarch64

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81356

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-07-08
          Component|target                      |tree-optimization
     Ever confirmed|0                           |1

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Confirmed, but this should be done either as a tree optimization or in the
builtin expansion.  The back-end mem copying expansions can't know this is a
null-terminated string.