[llvm] [ThinLTO] optimize propagateAttributes performance (PR #132917)

[Teresa Johnson via llvm-commits]

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@@ -199,9 +199,7 @@ bool ModuleSummaryIndex::isGUIDLive(GlobalValue::GUID GUID) const {
   return false;
 }
 
-static void
-propagateAttributesToRefs(GlobalValueSummary *S,
-                          DenseSet<ValueInfo> &MarkedNonReadWriteOnly) {
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teresajohnson wrote:

I wonder whether it would be a bit more efficient to make this a DenseSet of the GlobalValue::GUID instead of the ValueInfo

https://github.com/llvm/llvm-project/pull/132917