Re: gcc feature request / RFC: extra clobbered regs

H. Peter Anvin
2015-06-30T21:42:21Z

On 06/30/2015 02:37 PM, Jakub Jelinek wrote:
> I'd say the most natural API for this would be to allow
> f{fixed,call-{used,saved}}-REG in target attribute.

Either that or

__attribute__((fixed(rbp,rcx),used(rax,rbx),saved(r11)))

... just to be shorter. Either way, I would consider this to be
desirable -- I have myself used this to good effect in a past life
(*cough* Transmeta *cough*) -- but not a high priority feature.

-hpa