On 02/24/2016 01:42 PM, Alexander Monakov wrote:
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.
Which would imply that the outgoing argument stack slots must always be
considered clobbered by a call.
FWIW, I'm fine with that interpretation ;-)
jeff
