[llvm] [InstCombine] Convert load from LUT into a select (PR #98339)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

The implementation here is still too type-based. While the GEP offsets are not handled properly, you're still doing type-based analysis on the constant initializer. You should use ConstantFoldLoadFromConst for that instead.

https://github.com/llvm/llvm-project/pull/98339