On Thu, Feb 10, 2022 at 06:23:58PM +0100, Jakub Jelinek wrote: > On Thu, Feb 10, 2022 at 10:42:03AM -0600, Segher Boessenkool wrote: > > > Not on x86, that isn't a general auto-inc-dec target, but uses PRE_DEC > > > etc. only for the sp hard register. > > > > Ugh. Does it have any benefit from using autoinc at all then? (Actual > > benefit, not notational convenience). > > That is the most accurate description of what the push/pop instructions > actually do, and the backend has been doing it for decades.
It is exactly as accurate as the simpler direct representation as a parallel (which we have used since 1992). Segher
