[LLVMdev] Updating value from PHI

[Marc de Kruijf]

It sounds like Transforms/Utils/SSAUpdater may be what you are looking
for.
A good example of how to use it -- one that sounds very similar to what
you're doing -- can be found in Transforms/Scalar/LoopRotation.cpp

On Wed, Mar 7, 2012 at 2:03 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:

> I am splitting a one BB loop into two BB.
>
> Basically, the one loop BB has 3 incoming values, one form back edge two
> from other edges. I want to extract the PHIs from the other two edges out
> into it's own BB and delete that from the loop, then redirect the backedge
> to the loopbody (non extracted portion) and create a new PHI coming from
> the extracted BB and the backedge.
>
> I can do this; however, the PHIs following in all the other BBs are not
> getting updated, neither are the statements in the loopbody.
>
> What is the easieset way to propagate these changes downward?
>
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