On 19 February 2016 at 10:29, Andreas Rossberg <[email protected]> wrote:
> On 19 February 2016 at 06:29, John Lenz <[email protected]> wrote: > >> However, at the CPU level, it seems like you would be better pushing an >> return address for a special function that indicated the start of a >> sequence of tail calls. That way you trade only some >> complexity/performance for tail calls (an inspection of the last entry of >> the call stack) and some stack frame building complexity (to recognize this >> "special" frame). >> > > There is no way of knowing, neither statically nor dynamically, that you > are at "the start of a sequence of tail calls". And doing it for every tail > call would of course defeat tail calls. > Or to put that differently: if there was, then the very problem wouldn't exist. ;)
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