[PATCH] D42406: Utils: Fix DomTree update for entry block

[Brian Rzycki via Phabricator via llvm-commits]

brzycki accepted this revision.
brzycki added a comment.
This revision is now accepted and ready to land.

In https://reviews.llvm.org/D42406#985221, @arsenm wrote:

> In https://reviews.llvm.org/D42406#985160, @brzycki wrote:
>
> > I too am curious how this managed to not be found for several years. @arsenm how did you discover this?
>
>
> I'm working on a replacement for StructurizeCFG which needs to insert a block before certain blocks. Sometimes that ends up picking the entry block


Thanks @arsenm for the explanation. I was curious to know if you found this with a specific .c/.cpp file or if it was from changing the middle-end. The latter makes a lot more sense to discover a latent bug like this.

LGTM.


https://reviews.llvm.org/D42406