[Bug tree-optimization/30398] memmove for string operations

["tkoenig at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30398

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
This is what we generated now for

program main
  character(len=1) :: s
  character(len=2) :: c
  s = 'a'
  c = repeat(s,2)
  call foo(c)
end program main

:

;; Function main (main, funcdef_no=1, decl_uid=3926, cgraph_uid=2,
symbol_order=1) (executed once)

__attribute__((externally_visible))
main (integer(kind=4) argc, character(kind=1) * * argv)
{
  character(kind=1) c[1:2];
  static integer(kind=4) options.3[7] = {2116, 4095, 0, 1, 1, 0, 31};

  <bb 2> [local count: 1073741825]:
  _gfortran_set_args (argc_2(D), argv_3(D));
  _gfortran_set_options (7, &options.3[0]);
  MEM <unsigned short> [(c_char * {ref-all})&c] = 24929;
  foo (&c, 2);
  c ={v} {CLOBBER};
  return 0;

}

So, everything that should be optimized is now optimized.

Fixed.