[clang] [lld] [llvm] [ThinLTO] Reduce the number of renaming due to promotions (PR #178587)

[Teresa Johnson via cfe-commits]

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@@ -773,6 +773,9 @@ struct DevirtIndex {
   // resolution for local targets in case they are exported by cross module
   // importing.
   std::map<ValueInfo, std::vector<VTableSlotSummary>> &LocalWPDTargetsMap;
+  // If not null, the set records local functions which are exported to
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teresajohnson wrote:

And specifically, we have hardcoded the promoted and renamed function name in the WPD summary, so we need to ensure that they will be renamed. Note this and that adding the current names to this set ensures we continue to rename them.

https://github.com/llvm/llvm-project/pull/178587