[llvm] [SelectionDAG] Handle more opcodes in isGuaranteedNotToBeUndefOrPoison (PR #147019)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon commented:

Cheers - lack of test coverage is annoying, but par for the course with DAG freeze handling.

I just need to get #149797 done first as I'm not going to be able to create a proper fix for #148084 that I can merge into 21.x.

https://github.com/llvm/llvm-project/pull/147019