llvm dev - Mar 2008 - [LLVMdev] MachineFunction Cloning

Is there a utility somewhere to clone a MachineFunction?  I'd like to do a
bunch of complicated transformations and then throw away the results and
restore the initial state if I decide it's not good.

Are there methods to save and restore dataflow information in the same way?
I'm particularly interested in live interval information.

                                           -Dave

On Mar 12, 2008, at 1:56 PM, David Greene wrote:
> Is there a utility somewhere to clone a MachineFunction?  I'd like  
> to do a
> bunch of complicated transformations and then throw away the results  
> and
> restore the initial state if I decide it's not good.
There is a MachineInstr::clone(), but not a MachineFunction::clone().  
It's not clear to me whether it is difficult to add.
>
> Are there methods to save and restore dataflow information in the  
> same way?
> I'm particularly interested in live interval information.
There is a LiveInterval::Copy(), but that's about it. I think live  
interval information should be relatively easy to copy though.

Evan
>
>
>                                           -Dave
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