[PATCH] Add iterator for PHINode value/BB pair

[Tobias Edler von Koch]

On Wed, 22 Jul 2015 12:40:27 -0700 Daniel Berlin <dberlin at dberlin.org>
wrote:

> If you can't modify it, the iterator name's functions or type should
> reflect that :)

Agree! 

It would be even nicer if you could actually modify the PHI
node this way... there are use cases for that too.

Tobias

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