[llvm] [SimplifyCFG] Use indexType from data layout in switch to table conversion (PR #146207)

[Andreas Jonson via llvm-commits]

andjo403 wrote:

> Can you check that the redundant sext_inreg is eliminated after this patch? IIRC I did a similar change to SimplifyCFG, but it didn't work :(

when I run the reducer from the Issue after this PR trough llc the "slli + srai" is replaced with a andi see https://godbolt.org/z/nqbc5713o 
so maybe not really fix of the Issue as I assume that andi is also redundant as the range is (0, 8]


https://github.com/llvm/llvm-project/pull/146207