[llvm] [InstCombine] Fix #163110: Support peeling off matching shifts from icmp operands via canEvaluateShifted (PR #165975)

[via llvm-commits]

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Michael-Chen-NJU wrote:

Hi @nikic, I have updated the doc comments for canEvaluateShifted to explicitly clarify the current semantics. Does this clarification address your concerns and is it sufficient to move forward with landing this patch?

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