Problem with reg_equiv_alt_mem

[Steven Bosscher]

On 3/12/07, Unruh, Erwin <Erwin.Unruh@fujitsu-siemens.com> wrote:
> In a private port I had the problem that reg_equiv_alt_mem_list did
> contain the
> same RTL as reg_equiv_memory_loc. This caused an assert in
> delete_output_reload,
> where these are compared with equal_rtx_p.
> The list is build with push_reg_equiv_alt_mem, but only when "tem !=
> orig". The
> value tem is build with find_reloads_address. Within that function we
> have some
> code which simply unshares the RTL. The return value will be the new
> RTL, even
> in some cases where the RTL did not change.
>
> I think the test in front of push_reg_equiv_alt_mem should be done via
> rtx_equal_p. This would match the assert in delete_output_reload.
>
> My private port is based on GCC 4.1.0, but the code looks the same in
> 4.3.
>
> I do not have papers on file so someone else should prepare a patch.

For sufficiently small patches (usually less than 10 lines changed is
used as the norm) you don't need to have a copyright assignment on
file.  Such small changes are apparently not covered by copyright.

So if you could send a patch, that'd be quite helpful ;-)

Gr.
Steven