[llvm] [InstCombine] disable select folding resulting in extra instructions (PR #97184)

[Nikita Popov via llvm-commits]

https://github.com/nikic approved this pull request.

This is a step in the right direction, but I think after this change there is still an issue due to a missing one-use check on the icmp?

If we have multi-use icmp, then we shouldn't do the transform even if we don't need to insert a shift, as it would still increase instructions.

https://github.com/llvm/llvm-project/pull/97184