diff --git a/bolt/include/bolt/Core/DebugData.h b/bolt/include/bolt/Core/DebugData.h
--- a/bolt/include/bolt/Core/DebugData.h
+++ b/bolt/include/bolt/Core/DebugData.h
@@ -313,9 +313,6 @@
   /// Adds Address to map.
   uint32_t getIndexFromAddress(uint64_t Address, DWARFUnit &CU);
 
-  /// Adds {\p Address, \p Index} to \p CU.
-  void addIndexAddress(uint64_t Address, uint32_t Index, DWARFUnit &CU);
-
   /// Write out entries in to .debug_addr section for CUs.
   virtual void update(DIEBuilder &DIEBlder, DWARFUnit &CUs);
 
diff --git a/bolt/lib/Core/DebugData.cpp b/bolt/lib/Core/DebugData.cpp
--- a/bolt/lib/Core/DebugData.cpp
+++ b/bolt/lib/Core/DebugData.cpp
@@ -414,25 +414,6 @@
   return Entry->second;
 }
 
-// Case1) Address is not in map insert in to AddresToIndex and IndexToAddres
-// Case2) Address is in the map but Index is higher or equal. Need to update
-// IndexToAddrss. Case3) Address is in the map but Index is lower. Need to
-// update AddressToIndex and IndexToAddress
-void DebugAddrWriter::addIndexAddress(uint64_t Address, uint32_t Index,
-                                      DWARFUnit &CU) {
-  std::lock_guard<std::mutex> Lock(WriterMutex);
-  const uint64_t CUID = getCUID(CU);
-  AddressForDWOCU &Map = AddressMaps[CUID];
-  auto Entry = Map.find(Address);
-  if (Entry != Map.end()) {
-    if (Entry->second > Index)
-      Map.updateAddressToIndex(Address, Index);
-    Map.updateIndexToAddrss(Address, Index);
-  } else {
-    Map.insert(Address, Index);
-  }
-}
-
 static void updateAddressBase(DIEBuilder &DIEBlder, DebugAddrWriter &AddrWriter,
                               DWARFUnit &CU, const uint64_t Offset) {
   DIE *Die = DIEBlder.getUnitDIEbyUnit(CU);