More on addressof: how to fix the backends that use them?

[Steven Bosscher]

Hi,

Before we can even consider removing addresof, there still
are two backends that build ADDRESSOF rtxes: alpha and ia64.

For example, alpha.c uses it as follows:

/* Return or create a pseudo containing the gp value for the current
   function.  Needed only if TARGET_LD_BUGGY_LDGP.  */

rtx
alpha_gp_save_rtx (void)
{
  rtx r = get_hard_reg_initial_val (DImode, 29);
  if (GET_CODE (r) != MEM)
    r = gen_mem_addressof (r, NULL_TREE, /*rescan=*/true);
  return r;
}

What can this code be replaced with such that it does not
create an ADDRESSOF?

I've attached an updated version of Honza's patch from some time
ago (http://gcc.gnu.org/ml/gcc-patches/2004-02/msg01417.html) for
those who are interested.

Gr.
Steven

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