[llvm] [InstCombine] Add one-use limitation to box multiply fold (PR #72876)

[Yingwei Zheng via llvm-commits]

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@@ -1405,8 +1405,13 @@ static Instruction *foldBoxMultiply(BinaryOperator &I) {
   // ResLo = (CrossSum << HalfBits) + (YLo * XLo)
   Value *XLo, *YLo;
   Value *CrossSum;
+  
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dtcxzyw wrote:

Please drop redundant spaces here.

https://github.com/llvm/llvm-project/pull/72876