[RFC] preserving loop metadata

[Nadav Rotem]

Hi Paul,
 
This approach makes sense to me. I like the use of RAII.

Thanks,
Nadav

On Feb 20, 2013, at 12:20 PM, "Redmond, Paul" <paul.redmond at intel.com> wrote:

> Hi,
> 
> The attached patch is based on the Pekka Jääskeläinen's loop metadata work. I have refactored his work into two classes LoopMetadata and PreserveLoopMetadata.
> 
> PreserveLoopMetadata is intended to be used by LoopPasses to preserve the loop metadata after transformations. I have modified LoopRotation as an example (it is a pass which will cause the metadata to get lost) The classes is also intended to make the changes to existing passes as unobtrusive as possible.
> 
> If this seems like a reasonable approach I will add some tests and resubmit for review.
> 
> paul
> 
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