Index: llvm/lib/Passes/StandardInstrumentations.cpp
===================================================================
--- llvm/lib/Passes/StandardInstrumentations.cpp
+++ llvm/lib/Passes/StandardInstrumentations.cpp
@@ -19,6 +19,7 @@
 #include "llvm/Analysis/CallGraphSCCPass.h"
 #include "llvm/Analysis/LazyCallGraph.h"
 #include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Analysis/LoopNestAnalysis.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/Module.h"
@@ -290,6 +291,15 @@
     return OS.str();
   }
 
+  if (any_isa<const LoopNest *>(IR)) {
+    const Loop *L = &any_cast<const LoopNest *>(IR)->getOutermostLoop();
+    std::string S;
+    raw_string_ostream OS(S);
+    assert(L && "Loop should be valid for printing");
+    L->print(OS, /*Verbose*/ false, /*PrintNested*/ false);
+    return OS.str();
+  }
+
   llvm_unreachable("Unknown wrapped IR type");
 }
 
@@ -858,7 +868,11 @@
   if (!ShouldRun && DebugLogging) {
     errs() << "Skipping pass " << PassID << " on " << F->getName()
            << " due to optnone attribute\n";
+  } else if (any_isa<const LoopNest *>(IR)) {
+    const Loop *L = &any_cast<const LoopNest *>(IR)->getOutermostLoop();
+    F = L->getHeader()->getParent();
   }
+
   return ShouldRun;
 }