[MLton] AMD64

[Matthew Fluet]

> Is AMD64 support still planned at some stage?

Yes, work is progressing on the x86_64 branch:

http://mlton.org/cgi-bin/viewsvn.cgi/mlton/branches/on-20050822-x86_64-branch/

I'll shortly be writing up a little document on where it is and where it 
is going, but the short version is that the garbage collector has been 
made native pointer size agnostic with configurable heap object pointer 
representation.  There are no known regressions with respect to the 
rewritten GC and the present 32-bit compiler.