[llvm] 58b95c9 - [StackSafety,NFC] Add debug counters

[Vitaly Buka via llvm-commits]

Author: Vitaly Buka
Date: 2020-08-06T19:24:02-07:00
New Revision: 58b95c9b2bb7d3a1422f79e6d53f5e0c5a4a0387

URL: https://github.com/llvm/llvm-project/commit/58b95c9b2bb7d3a1422f79e6d53f5e0c5a4a0387
DIFF: https://github.com/llvm/llvm-project/commit/58b95c9b2bb7d3a1422f79e6d53f5e0c5a4a0387.diff

LOG: [StackSafety,NFC] Add debug counters

Added: 
    

Modified: 
    llvm/lib/Analysis/StackSafetyAnalysis.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Analysis/StackSafetyAnalysis.cpp b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
index 7043a403a427..56039d72b0c5 100644
--- a/llvm/lib/Analysis/StackSafetyAnalysis.cpp
+++ b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
@@ -37,6 +37,15 @@ using namespace llvm;
 STATISTIC(NumAllocaStackSafe, "Number of safe allocas");
 STATISTIC(NumAllocaTotal, "Number of total allocas");
 
+STATISTIC(NumCombinedCalleeLookupTotal,
+          "Number of total callee lookups on combined index.");
+STATISTIC(NumCombinedCalleeLookupFailed,
+          "Number of failed callee lookups on combined index.");
+STATISTIC(NumModuleCalleeLookupTotal,
+          "Number of total callee lookups on module index.");
+STATISTIC(NumModuleCalleeLookupFailed,
+          "Number of failed callee lookups on module index.");
+
 static cl::opt<int> StackSafetyMaxIterations("stack-safety-max-iterations",
                                              cl::init(20), cl::Hidden);
 
@@ -638,8 +647,11 @@ void resolveAllCalls(UseInfo<GlobalValue> &Use,
     GlobalValueSummary *GVS = getGlobalValueSummary(Index, C.Callee->getGUID());
 
     FunctionSummary *FS = resolveCallee(GVS);
-    if (!FS)
+    ++NumModuleCalleeLookupTotal;
+    if (!FS) {
+      ++NumModuleCalleeLookupFailed;
       return Use.updateRange(FullSet);
+    }
     const ConstantRange *Found = findParamAccess(*FS, C.ParamNo);
     if (!Found)
       return Use.updateRange(FullSet);
@@ -945,7 +957,9 @@ void llvm::generateParamAccessSummary(ModuleSummaryIndex &Index) {
             assert(!Call.Offsets.isFullSet());
             FunctionSummary *S = resolveCallee(
                 Index.findSummaryInModule(Call.Callee, FS->modulePath()));
+            ++NumCombinedCalleeLookupTotal;
             if (!S) {
+              ++NumCombinedCalleeLookupFailed;
               US.Range = FullSet;
               US.Calls.clear();
               break;