[llvm] [InstCombine] Fix #163110: Fold icmp (shl X, L), (add (shl Y, L), 1<<L) to icmp X, (Y + 1) (PR #165975)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw commented:

Can we perform this fold with `canEvaluateShifted` + `getShiftedValue`? You can use the known bits to estimate the number of bits to be shifted.


https://github.com/llvm/llvm-project/pull/165975