who owns stack args?

[Alexander Monakov]

On Wed, 24 Feb 2016, DJ Delorie wrote:
> The real question is: are stack arguments call-clobbered or
> call-preserved?  Does the answer depend on the "pure" attribute?

Stack area holding stack arguments should belong to the callee for tail-calls
to work (the callee will trash that area when laying out arguments for the
tail call; thanks to Rich Felker for pointing that out to me).

Thus it cannot depend on attribute-pure.

Alexander