🚀 go-pugleaf

raymondc@microsoft.com (Raymond Chen) writes:
>I figure stack management is the toughest part.  the "caller cleans the
>stack" calling convention used by many compilers (to make variadic
>functions easier) makes it impossible to optimize the last call in a
>function like
>
>	f(a) { return g(a, 2); }
>
>because f's caller will clean only one word from the stack, whereas
>g will leave two words of garbage on the stack when it exits.

	Actually, if you pass the first N arguments in registers, most such
calls can use last-call optimization.  I think most RISC compilers pass
some arguments in registers.  Even the SAS/C Amiga compiler will pass up to
2 pointers and 2 integers in registers.

-- 
GNU Emacs is a LISP operating system disguised as a word processor.
 - Doug Mohney, in comp.arch

Randell Jesup, Jack-of-quite-a-few-trades, Commodore Engineering.
jesup@cbmvax.commodore.com  BIX: rjesup  
Disclaimer: Nothing I say is anything other than my personal opinion.