https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30271
Jiu Fu Guo <guojiufu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |guojiufu at gcc dot gnu.org
--- Comment #13 from Jiu Fu Guo <guojiufu at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #10)
> (In reply to comment #9)
> > Andrew,
> >
> > What is your point here?
>
> My point here is that currently we do:
> gi->frame_related =
> (base == frame_pointer_rtx) || (base == hard_frame_pointer_rtx);
>
> But if we change it to be:
> gi->frame_related =
> (base == frame_pointer_rtx) || (base == hard_frame_pointer_rtx)
> || (base == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM]);
>
> It would delete the store (at least in a 4.3 based compiler).
> arg_pointer_rtx is the incoming argument space so if it is a fixed register
> it will be also frame related and we can safely delete the stores to this
> space.
https://gcc.gnu.org/pipermail/gcc-patches/2023-December/639550.html is using
this idea too. And the 'std' in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=30271#c2 disappeared.
