I'm not quite sure I follow you.. if its possible to dedicate a register to
act as the data-stack pointer, and implement it that way, why would I want
to "keep the SP as a virtual register"? I'm not being antagonistic when I
say that.. I'm just trying to understand what you're trying to tell me..
Will check out the ip2k port again.. the last time I looked, I was blinded
by the assumption that if the usual stack macros were defined in a
straightforward fashion, that the target actually supported (or implemented)
a stack... "It ain't necessarily so".
you might be able to keep the SP as a virtual register and make sure
that code generation never tries to actually use it
