[llvm] [BOLT]Improve profile quality reporting (PR #130810)

[via llvm-commits]

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@@ -187,8 +188,10 @@ void printCallGraphFlowConservationStats(
   std::vector<double> CallGraphGaps;
 
   for (const BinaryFunction *Function : Functions) {
-    if (Function->size() <= 1 || !Function->isSimple())
+    if (Function->size() <= 1 || !Function->isSimple()) {
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ShatianWang wrote:

They do currently participate in the call graph flow conservation gap, because the function calls made by non-simple functions are used to construct `CallGraphIncomingFlows` in function `computeFlowMappings`.

We are skipping them here because I don't think we have a way to accurately get the net entry block CFG outflow for all non-simple functions. 

https://github.com/llvm/llvm-project/pull/130810