[llvm] [InstCombine] Resolve TODO: Remove one-time check if other logic operand (Y) is constant (PR #77973)

[via llvm-commits]

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@@ -689,7 +690,8 @@ static Value *getShiftedValue(Value *V, unsigned NumBits, bool isLeftShift,
   IC.addToWorklist(I);
 
   switch (I->getOpcode()) {
-  default: llvm_unreachable("Inconsistency with CanEvaluateShifted");
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AtariDreams wrote:

I don't know why clang-format does that but I am trying to remove these changes.

https://github.com/llvm/llvm-project/pull/77973