[PATCH] D43140: [Dominators] Always recalculate postdominators when update yields different roots

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

Thanks for this! I obviously think this looks fine, but I will let someone who knows more about this to check it's OK too.

But any idea why verifyRoots did not catch this case already? If the newly calculated roots are different from what is in the PDT.


Repository:
  rL LLVM

https://reviews.llvm.org/D43140