[LLVMdev] module level assembly optimization

[reed kotler]

I would like to do constant pools over an entire module instead of just 
on a per function basis as constant islands does it now.

It seems there are two options for this:

1) collect the machine functions with their machine instructions for the 
whole module, edit them as needed and then
call asmprinter for them one at a time.

2) collect all the instruction streams and store them in lists, one per 
section and put them all out at the end.

There are possibly other kinds of module level optimizations that could 
benefit from this.

Some of this might be better done by moving this functionality into 
target independent code but I think I could do it all
without such changes.

Any thoughts?

Reed