[llvm] [WPD][ThinLTO]Add cutoff option for WPD (PR #113383)

[Teresa Johnson via llvm-commits]

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@@ -1169,6 +1177,10 @@ void DevirtModule::applySingleImplDevirt(VTableSlotInfo &SlotInfo,
       if (!OptimizedCalls.insert(&VCallSite.CB).second)
         continue;
 
+      if (WholeProgramDevirtCutoff.getNumOccurrences() > 0 &&
+          NumSingleImpl >= WholeProgramDevirtCutoff)
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teresajohnson wrote:

NumSingleImpl is a STATISTIC - I'm not sure if it is safe to use this here as I believe the compiler can be built with statistics disabled, in which case this variable would not be correctly tracking the number.

https://github.com/llvm/llvm-project/pull/113383