Index: llvm/lib/Transforms/IPO/HotColdSplitting.cpp
===================================================================
--- llvm/lib/Transforms/IPO/HotColdSplitting.cpp
+++ llvm/lib/Transforms/IPO/HotColdSplitting.cpp
@@ -117,8 +117,12 @@
   if (blockEndsInUnreachable(BB)) {
     if (auto *CI =
             dyn_cast_or_null<CallInst>(BB.getTerminator()->getPrevNode()))
-      if (CI->hasFnAttr(Attribute::NoReturn))
-        return false;
+      if (CI->hasFnAttr(Attribute::NoReturn)) {
+        if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CI))
+          return II->getIntrinsicID() != Intrinsic::longjmp;
+        CallSite CS(CI);
+        return !CS.getCalledFunction()->getName().startswith("longjmp");
+      }
     return true;
   }