diff --git a/include/llvm/PassRegistry.h b/include/llvm/PassRegistry.h
index 6233f24c5fd..8c28ef5e7e6 100644
--- a/include/llvm/PassRegistry.h
+++ b/include/llvm/PassRegistry.h
@@ -48,12 +48,6 @@ class PassRegistry {
   typedef StringMap<const PassInfo *> StringMapType;
   StringMapType PassInfoStringMap;
 
-  /// AnalysisGroupInfo - Keep track of information for each analysis group.
-  struct AnalysisGroupInfo {
-    SmallPtrSet<const PassInfo *, 8> Implementations;
-  };
-  DenseMap<const PassInfo *, AnalysisGroupInfo> AnalysisGroupInfoMap;
-
   std::vector<std::unique_ptr<const PassInfo>> ToFree;
   std::vector<PassRegistrationListener *> Listeners;
 
diff --git a/lib/IR/PassRegistry.cpp b/lib/IR/PassRegistry.cpp
index 2cff3ccdc23..b879fef3f4a 100644
--- a/lib/IR/PassRegistry.cpp
+++ b/lib/IR/PassRegistry.cpp
@@ -101,10 +101,6 @@ void PassRegistry::registerAnalysisGroup(const void *InterfaceID,
     // the interface.
     ImplementationInfo->addInterfaceImplemented(InterfaceInfo);
 
-    AnalysisGroupInfo &AGI = AnalysisGroupInfoMap[InterfaceInfo];
-    assert(AGI.Implementations.count(ImplementationInfo) == 0 &&
-           "Cannot add a pass to the same analysis group more than once!");
-    AGI.Implementations.insert(ImplementationInfo);
     if (isDefault) {
       assert(InterfaceInfo->getNormalCtor() == nullptr &&
              "Default implementation for analysis group already specified!");