[llvm] [Hexagon] Fix O(N^2) compile-time regression in HexagonOptAddrMode (PR #189531)

[Ankit Aggarwal via llvm-commits]

https://github.com/aankit-ca commented:

This LGTM to me too once you fix androm3da's comments.

I have one question: Is the testcase sufficient enough to cause the hang? If not can we consider increasing it's size?

https://github.com/llvm/llvm-project/pull/189531