diff --git a/llvm/tools/llvm-profgen/PerfReader.h b/llvm/tools/llvm-profgen/PerfReader.h
--- a/llvm/tools/llvm-profgen/PerfReader.h
+++ b/llvm/tools/llvm-profgen/PerfReader.h
@@ -580,6 +580,7 @@
   uint64_t NumTotalSample = 0;
   uint64_t NumLeafExternalFrame = 0;
   uint64_t NumLeadingOutgoingLBR = 0;
+  uint64_t NumEmptyLBRSample = 0;
 };
 
 // Read perf script to parse the events and samples.
diff --git a/llvm/tools/llvm-profgen/PerfReader.cpp b/llvm/tools/llvm-profgen/PerfReader.cpp
--- a/llvm/tools/llvm-profgen/PerfReader.cpp
+++ b/llvm/tools/llvm-profgen/PerfReader.cpp
@@ -748,7 +748,7 @@
     }
   } else {
     // LBR sample is encoded in single line after stack sample
-    exitWithError("'Hybrid perf sample is corrupted, No LBR sample line");
+    NumEmptyLBRSample++;
   }
 }
 
@@ -1204,6 +1204,8 @@
   // Parse perf traces and do aggregation.
   parseAndAggregateTrace();
 
+  emitWarningSummary(NumEmptyLBRSample, NumTotalSample,
+                     "of hybrid samples have call stack sample but no LBR sample");
   emitWarningSummary(NumLeafExternalFrame, NumTotalSample,
                      "of samples have leaf external frame in call stack.");
   emitWarningSummary(NumLeadingOutgoingLBR, NumTotalSample,