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

[Teresa Johnson via llvm-commits]

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@@ -213,9 +211,10 @@ propagateAttributesToRefs(GlobalValueSummary *S,
   for (auto &VI : S->refs()) {
     assert(VI.getAccessSpecifier() == 0 || isa<FunctionSummary>(S));
     if (!VI.getAccessSpecifier()) {
-      if (!MarkedNonReadWriteOnly.insert(VI).second)
+      if (VI.getRef()->second.MarkedNonReadWriteOnly)
         continue;
-    } else if (MarkedNonReadWriteOnly.contains(VI))
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teresajohnson wrote:

I would add an assert in the else case though to confirm this assumption (that MarkedNonReadWriteOnly.contains(VI) is false).

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