[llvm] [DebugInfo][Reassociate] Fix missing debug location drop (PR #95355)

[Shan Huang via llvm-commits]

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@@ -845,6 +845,7 @@ static Value *NegateValue(Value *V, Instruction *BI,
     }
 
     TheNeg->moveBefore(*InsertPt->getParent(), InsertPt);
+    TheNeg->dropLocation();
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Apochens wrote:

I think that is a solution. I'll do that. 🤔

https://github.com/llvm/llvm-project/pull/95355