[BOLT][NFC] Drop unused profile staleness stats

[aaupov]

Equal number of blocks in a function/instructions in a block between
stale profile and the binary isn't used in the matching.

Remove these stats to declutter the output.

Test Plan: NFC

[llvmbot]

@llvm/pr-subscribers-bolt

Author: Amir Ayupov (aaupov)

Changes

Equal number of blocks in a function/instructions in a block between
stale profile and the binary isn't used in the matching.

Remove these stats to unclog the output.

Test Plan: NFC

---

Full diff: https://github.com/llvm/llvm-project/pull/165489.diff

3 Files Affected:

• (modified) bolt/include/bolt/Core/BinaryContext.h (-5)
• (modified) bolt/lib/Passes/BinaryPasses.cpp (-17)
• (modified) bolt/lib/Profile/YAMLProfileReader.cpp (-3)

diff --git a/bolt/include/bolt/Core/BinaryContext.h b/bolt/include/bolt/Core/BinaryContext.h
index 082f1cec34d52..47ee892728ad0 100644
--- a/bolt/include/bolt/Core/BinaryContext.h
+++ b/bolt/include/bolt/Core/BinaryContext.h
@@ -775,11 +775,6 @@ class BinaryContext {
     uint64_t PseudoProbeLooseMatchedSampleCount{0};
     ///   the count of call matched samples
     uint64_t CallMatchedSampleCount{0};
-    ///   the number of stale functions that have matching number of blocks in
-    ///   the profile
-    uint64_t NumStaleFuncsWithEqualBlockCount{0};
-    ///   the number of blocks that have matching size but a differing hash
-    uint64_t NumStaleBlocksWithEqualIcount{0};
   } Stats;
 
   // Original binary execution count stats.
diff --git a/bolt/lib/Passes/BinaryPasses.cpp b/bolt/lib/Passes/BinaryPasses.cpp
index 06e840e84f53b..00680045882fc 100644
--- a/bolt/lib/Passes/BinaryPasses.cpp
+++ b/bolt/lib/Passes/BinaryPasses.cpp
@@ -1505,12 +1505,6 @@ Error PrintProgramStats::runOnFunctions(BinaryContext &BC) {
   if (NumAllStaleFunctions) {
     const float PctStale =
         NumAllStaleFunctions / (float)NumAllProfiledFunctions * 100.0f;
-    const float PctStaleFuncsWithEqualBlockCount =
-        (float)BC.Stats.NumStaleFuncsWithEqualBlockCount /
-        NumAllStaleFunctions * 100.0f;
-    const float PctStaleBlocksWithEqualIcount =
-        (float)BC.Stats.NumStaleBlocksWithEqualIcount /
-        BC.Stats.NumStaleBlocks * 100.0f;
     auto printErrorOrWarning = [&]() {
       if (PctStale > opts::StaleThreshold)
         BC.errs() << "BOLT-ERROR: ";
@@ -1533,17 +1527,6 @@ Error PrintProgramStats::runOnFunctions(BinaryContext &BC) {
                 << "%) belong to functions with invalid"
                    " (possibly stale) profile.\n";
     }
-    BC.outs() << "BOLT-INFO: " << BC.Stats.NumStaleFuncsWithEqualBlockCount
-              << " stale function"
-              << (BC.Stats.NumStaleFuncsWithEqualBlockCount == 1 ? "" : "s")
-              << format(" (%.1f%% of all stale)",
-                        PctStaleFuncsWithEqualBlockCount)
-              << " have matching block count.\n";
-    BC.outs() << "BOLT-INFO: " << BC.Stats.NumStaleBlocksWithEqualIcount
-              << " stale block"
-              << (BC.Stats.NumStaleBlocksWithEqualIcount == 1 ? "" : "s")
-              << format(" (%.1f%% of all stale)", PctStaleBlocksWithEqualIcount)
-              << " have matching icount.\n";
     if (PctStale > opts::StaleThreshold) {
       return createFatalBOLTError(
           Twine("BOLT-ERROR: stale functions exceed specified threshold of ") +
diff --git a/bolt/lib/Profile/YAMLProfileReader.cpp b/bolt/lib/Profile/YAMLProfileReader.cpp
index 086e47b661e10..f0f87f9baec38 100644
--- a/bolt/lib/Profile/YAMLProfileReader.cpp
+++ b/bolt/lib/Profile/YAMLProfileReader.cpp
@@ -350,9 +350,6 @@ bool YAMLProfileReader::parseFunctionProfile(
              << MismatchedCalls << " calls, and " << MismatchedEdges
              << " edges in profile did not match function " << BF << '\n';
 
-    if (YamlBF.NumBasicBlocks != BF.size())
-      ++BC.Stats.NumStaleFuncsWithEqualBlockCount;
-
     if (!opts::InferStaleProfile)
       return false;
     ArrayRef<ProbeMatchSpec> ProbeMatchSpecs;