[Bug tree-optimization/59478] Optimize variable access via byte copy

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59478

--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Just checked on GCC 9 ...

The case

int float_as_int (float val)
{
  char valbytes[sizeof (float)];
  for (int i = 0; i < sizeof (float); ++i)
    valbytes[i] = ((char*)&val)[i];

  int result;
  for (int i = 0; i < sizeof (float); ++i)
    ((char*)&result)[i] = valbytes[i];

  return result;
}

still doesn't work.  No idea why it doesn't go the same path as the
__builtin_memcpy.  Those cases work fine.

Please leave open.