[Lightning] Re: `pushr' on SPARC

[Ludovic Courtès]

Hi,

Paolo Bonzini <address@hidden> writes:

> Actually, it seems to me that my "unsafe" push/pop works if the push and pop
> have no call in the middle.  Can you confirm this?

Yes, your push/pop (the one that just increments %sp) should work if
there are no function calls in the middle (and consequently no register
window underflow/overflow).

However, I believe one typically uses `push' to save registers before
calling a function (at least that's the only use case in my code IIRC).

Thus, I'd still be in favor of either a 16-octet push area (buggy, as
you mentioned in a previous post) or, rather, a patched save (assuming
`allocai' is not used when `pushr' is).

Thanks,
Ludovic.