[llvm] [InstCombine] Fold `X udiv Y` to `X lshr cttz(Y)` if Y is a power of 2 (PR #121386)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Conflicting files
llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp

Please rebase. Then I will merge this patch :)


https://github.com/llvm/llvm-project/pull/121386