[llvm-dev] failing branch elimination, how to diagnose

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[llvm-dev] failing branch elimination, how to diagnose

Chris Lattner via llvm-dev
For the backend I am writing, branch elimination is not working with the
following error message:

Pre-computing triangle chains.
Pre-merging due to unanalyzable fallthrough: %bb.1 ('L.2') -> %bb.2 ('return')
     %bb.2 ('return') -> Mid chain!

Obviously I am not constructing the chain correctly.  How do I figure out where
I went wrong?

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