[PATCH] D134203: [PGO] Avoid assertion on degenerate profile

[Rong Xu via Phabricator via llvm-commits]

xur added a comment.

In D134203#3800684 <https://reviews.llvm.org/D134203#3800684>, @davidxl wrote:

> This looks like related to infinite loops.

Not likely. Infinite loop usually has one successor non-zero count.
One possible case I can think of is a critical edge not split.


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