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

[Craig Topper via llvm-commits]

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@@ -368,12 +368,11 @@ static Instruction *foldShiftOfShiftedBinOp(BinaryOperator &I,
 
   // Find a matching one-use shift by constant. The fold is not valid if the sum
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topperc wrote:

The "one-use" part of this comment is no longer completely accurate.

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