Messages in this thread | | | Date | Tue, 30 Jun 2015 14:41:56 -0700 | From | "H. Peter Anvin" <> | Subject | Re: gcc feature request / RFC: extra clobbered regs |
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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
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