[Bug middle-end/112683] Optimizing memcpy range by extending to word bounds

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112683

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |middle-end

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  # RANGE [irange] long unsigned int [1, 16] MASK 0x1f VALUE 0x0
  _2 = _1 + 1;
  # PT = nonlocal 
  _3 = &__str_5(D)->_M_local_bufD.4676;
  # .MEM_7 = VDEF <.MEM_6>
  memcpyD.1403 (&<retval>._M_local_bufD.4676, _3, _2);

The range information is there already for _2.


Note the hugely expanded out instructions is a target issue though.