Re: [Q:] tail calls and parameter passing

Fermin Reig <reig@dcs.gla.ac.uk> wrote:
=>[ how can one handle a tail call from a routine without memory
=> parameters to one with memory parameters? ]


      The easiest thing is probably to just not optimize tail calls
with memory arguments. Beyond that, it probably depends on your
calling conventions. The one I've looked into a bit, namely the
AIX/RS6K C calling convention, allocates a fairly large fixed sized
stack frame for any function which calls another one, so there
should be space there in any case. So the tail call code in G could
write any memory args to F's frame, drop its own, and call H. Other
conventions may be less friendly (though probably a lot less
stack-hungry, as well.)


                                                                            Gary D. Duzan
                                                  Humble Practitioner of the Computing Arts

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