Re: [PATCH] Turn on LRA on all targets

[Uros Bizjak <ubizjak@gmail.com>]

On Mon, Apr 24, 2023 at 11:19 AM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
>
> On Sun, Apr 23, 2023 at 11:06:41PM +0200, Uros Bizjak wrote:
> > > I send this patch now so that people can start testing.  I don't plan to
> > > commit this for another week at least, for a week after GCC 13 release I
> > > guess?  How does that plan sound to people?
> >
> > An old patch to enable Alpha is at
> >
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66207
>
> Ah, good to hear it worked way back then already!
>
> We still need someone to test this on alpha now, years later, and give
> a final okay, but hearing this is encouraging :-)

Please note that bootstrap worked on alpha*EV6*, not plain alpha.

Plain alpha is !BWX architecture and uses {un,}aligned_memory_operand
predicates that call resolve_reload_operand function. Unfortunately,
this function peeks deep into reload internals (reg_equiv_memory_loc)
that has no equivalent in LRA. As said in the comment, this internal
function resolves what reload is going to do with OP if it is a
register.

Uros.