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

[Amir Ayupov via llvm-commits]

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@@ -365,6 +396,74 @@ void printCFGFlowConservationStats(raw_ostream &OS,
   }
 }
 
+void printExceptionHandlingStats(const BinaryContext &BC, raw_ostream &OS,
+                                 iterator_range<function_iterator> &Functions) {
+  std::vector<double> LPCountFractionsOfTotalBBEC;
+  std::vector<double> LPCountFractionsOfTotalInvokeEC;
+  for (const BinaryFunction *Function : Functions) {
+    size_t LPECSum = 0;
+    size_t BBECSum = 0;
+    size_t InvokeECSum = 0;
+    for (BinaryBasicBlock &BB : *Function) {
+      const size_t BBEC = BB.getKnownExecutionCount();
+      BBECSum += BBEC;
+      if (BB.isLandingPad())
+        LPECSum += BBEC;
+      for (const MCInst &Inst : BB) {
+        if (!BC.MIB->isCall(Inst))
+          continue;
+        if (BC.MIB->isInvoke(Inst)) {
+          const std::optional<MCPlus::MCLandingPad> EHInfo =
+              BC.MIB->getEHInfo(Inst);
+          if (EHInfo->first)
+            InvokeECSum += BBEC;
+        }
+      }
+    }
+    // We only consider functions with at least MinLPECSum counts in landing
+    // pads to avoid false positives due to sampling noise
+    const uint16_t MinLPECSum = 50;
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aaupov wrote:

Move out to the header or the beginning of this file as a constant?

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