[llvm] [Hexagon] Clang throws "Assertion `Inc.size() <= 2' failed" (PR #212913)

[Santanu Das via llvm-commits]

https://github.com/quic-santdas approved this pull request.

This handles a very good corner case. I presume this behavior might be seen in some other hexagon passes too.

https://github.com/llvm/llvm-project/pull/212913