On Tue, Nov 05, 2024 at 02:47:15PM +0100, Uros Bizjak wrote:
> We would have to define a memory clobber that would correspond to
> redzone and attach it to the asm parallel RTX, perhaps:
>
> (clobber (mem:BLK (reg:DI sp)))
That wouldn't represent what is actually clobbered.
That says everything from sp up is clobbered, while red zone clobber
means everything below it is, so it could be
(clobber (mem:BLK (plus:DI (reg:DI sp) (const_int -red_zone_size))))
with the appropriate red_zone_size as MEM_SIZE.
>
> that would ultimately clear "crtl->is_leaf" when detected.
Jakub
