[llvm] Globalopt pass produces invalid debug info (PR #100654)

[Stephen Tozer via llvm-commits]

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@@ -1338,6 +1338,7 @@ deleteIfDead(GlobalValue &GV,
     if (DeleteFnCallback)
       DeleteFnCallback(*F);
   }
+  ReplaceableMetadataImpl::SalvageDebugInfo(GV);
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SLTozer wrote:

Is this line necessary? I believe `GV.removeDeadConstantUsers();` should already call this if `GV` is dead, as part of `constantIsDead(..., /*RemoveDeadUsers=*/true)`.

https://github.com/llvm/llvm-project/pull/100654