diff --git a/llvm/utils/TableGen/SearchableTableEmitter.cpp b/llvm/utils/TableGen/SearchableTableEmitter.cpp
--- a/llvm/utils/TableGen/SearchableTableEmitter.cpp
+++ b/llvm/utils/TableGen/SearchableTableEmitter.cpp
@@ -119,9 +119,13 @@
       return "Intrinsic::" + getIntrinsic(I).EnumName;
     else if (Field.IsInstruction)
       return I->getAsString();
-    else if (Field.Enum)
+    else if (Field.Enum) {
+      auto *Entry = Field.Enum->EntryMap[cast<DefInit>(I)->getDef()];
+      if (!Entry)
+        PrintFatalError(Twine("entry for field '") + Field.Name + "' is null");
       return std::string(
           Field.Enum->EntryMap[cast<DefInit>(I)->getDef()]->first);
+    }
     PrintFatalError(Twine("invalid field type for field '") + Field.Name +
                     "', expected: string, bits, bit or code");
   }
@@ -596,6 +600,9 @@
 
 void SearchableTableEmitter::collectTableEntries(
     GenericTable &Table, const std::vector<Record *> &Items) {
+  if (Items.empty())
+    PrintFatalError(Twine("Table '") + Table.Name + "' has no items");
+
   for (auto EntryRec : Items) {
     for (auto &Field : Table.Fields) {
       auto TI = dyn_cast<TypedInit>(EntryRec->getValueInit(Field.Name));