[llvm-exegesis] Add branch miss validation counter (#81094)

This patch adds a branch miss validation counter so that it is easy to
quantify the number of missed branches when using the loop repetition
mode.

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/BenchmarkResult.cpp b/llvm/tools/llvm-exegesis/lib/BenchmarkResult.cpp
index c193a8e..570af6e 100644
--- a/llvm/tools/llvm-exegesis/lib/BenchmarkResult.cpp
+++ b/llvm/tools/llvm-exegesis/lib/BenchmarkResult.cpp
@@ -209,6 +209,8 @@ const char *validationEventToString(exegesis::ValidationEvent VE) {
     return "data-tlb-store-misses";
   case exegesis::ValidationEvent::InstructionTLBLoadMiss:
     return "instruction-tlb-load-misses";
+  case exegesis::ValidationEvent::BranchPredictionMiss:
+    return "branch-prediction-misses";
   }
   llvm_unreachable("Unhandled exegesis::ValidationEvent enum");
 }
@@ -228,6 +230,8 @@ Expected<exegesis::ValidationEvent> stringToValidationEvent(StringRef Input) {
     return exegesis::ValidationEvent::DataTLBStoreMiss;
   else if (Input == "instruction-tlb-load-misses")
     return exegesis::ValidationEvent::InstructionTLBLoadMiss;
+  else if (Input == "branch-prediction-misses")
+    return exegesis::ValidationEvent::BranchPredictionMiss;
   else
     return make_error<StringError>("Invalid validation event string",
                                    errc::invalid_argument);