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

[Rong Xu via Phabricator via llvm-commits]

xur added a comment.

This is an interesting example. When we design this, we assume there is at least one exit node in the function. And we create fake edges from exit node(s). This way we create a close graph.

For this case, we don't have an exit node and I think the function exits from a non-return call to "zeroexit". So the edge propagation will terminate incompletely.

I think this is a corner case but let me think how to handle this.


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