llvm dev - Nov 2007 - [LLVMdev] global register allocation.

As far as I understand , the regalloc passes provided operate on basic block
level?
Is there anything that operate on the whole Module?

Thx,
Sanjiv
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20071122/0b24c954/attachment.html>

Hi, Sanjiv,

     those passes operate on the whole machine function. Each machine 
function contains many basic blocks. If a program has many functions, the 
register allocator will be called as many times, i.e it does not do 
interprocedural allocation.

best,

Fernando
> As far as I understand , the regalloc passes provided operate on basic
block
> level?
> Is there anything that operate on the whole Module?
>
> Thx,
> Sanjiv
>

On 11/23/07, Fernando Magno Quintao Pereira <fernando at cs.ucla.edu>
wrote:
>
>
> Hi, Sanjiv,
>
>     those passes operate on the whole machine function. Each machine
> function contains many basic blocks. If a program has many functions, the
> register allocator will be called as many times, i.e it does not do
> interprocedural allocation.
>
> best,
>
> Fernando

Thanks for replying back.
I am looking to write a regalloc pass that does interprocedural regalloc.
By constructing a Call Graph and keeping the registers in a single call
chain different so that i can avoid spilling (saving) across function calls.
What will be the right place to do so?

Sanjiv
> As far as I understand , the regalloc passes provided operate on basic
> block
> > level?
> > Is there anything that operate on the whole Module?
> >
> > Thx,
> > Sanjiv
> >
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20071123/ee0abc75/attachment.html>