[llvm] [llvm-profgen] Improve sample profile density (PR #92144)

[via llvm-commits]

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@@ -190,9 +195,7 @@ void ProfileGeneratorBase::showDensitySuggestion(double Density) {
 
   if (ShowDensity)
     outs() << "Minimum profile density for hot functions with top "
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WenleiHe wrote:

With the new heuristic, this is message is no longer accurate? it's no longer hot functions with top x% total samples. 

https://github.com/llvm/llvm-project/pull/92144