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Subject: [Bug tree-optimization/30398] memmove for string operations
Date: Wed, 11 Nov 2020 09:31:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D30398

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=3D1) :: s
  character(len=3D2) :: c
  s =3D 'a'
  c =3D repeat(s,2)
  call foo(c)
end program main

:

;; Function main (main, funcdef_no=3D1, decl_uid=3D3926, cgraph_uid=3D2,
symbol_order=3D1) (executed once)

__attribute__((externally_visible))
main (integer(kind=3D4) argc, character(kind=3D1) * * argv)
{
  character(kind=3D1) c[1:2];
  static integer(kind=3D4) options.3[7] =3D {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] =3D 24929;
  foo (&c, 2);
  c =3D{v} {CLOBBER};
  return 0;

}

So, everything that should be optimized is now optimized.

Fixed.=