diff --git a/llvm/tools/bugpoint/CrashDebugger.cpp b/llvm/tools/bugpoint/CrashDebugger.cpp
--- a/llvm/tools/bugpoint/CrashDebugger.cpp
+++ b/llvm/tools/bugpoint/CrashDebugger.cpp
@@ -1377,7 +1377,7 @@
   outs() << "\n*** Debugging optimizer crash!\n";
 
   // Reduce the list of passes which causes the optimizer to crash...
-  if (!BugpointIsInterrupted && !DontReducePassList) {
+  if (!BugpointIsInterrupted && !DontReducePassList && PassesToRun.size() > 1) {
     Expected<bool> Result = ReducePassList(*this).reduceList(PassesToRun);
     if (Error E = Result.takeError())
       return E;
@@ -1390,7 +1390,7 @@
   EmitProgressBitcode(*Program, ID);
 
   auto Res = DebugACrash(*this, TestForOptimizerCrash);
-  if (Res || DontReducePassList)
+  if (Res || DontReducePassList || PassesToRun.size() == 1)
     return Res;
   // Try to reduce the pass list again. This covers additional cases
   // we failed to reduce earlier, because of more complex pass dependencies