diff --git a/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp b/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp
--- a/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/MachOLayoutBuilder.cpp
@@ -251,7 +251,10 @@
   uint64_t StartOfFunctionStarts = StartOfExportTrie + O.Exports.Trie.size();
   uint64_t StartOfDataInCode =
       StartOfFunctionStarts + O.FunctionStarts.Data.size();
-  uint64_t StartOfSymbols = StartOfDataInCode + O.DataInCode.Data.size();
+  uint64_t StartOfLinkerOptimizationHint =
+      StartOfDataInCode + O.DataInCode.Data.size();
+  uint64_t StartOfSymbols =
+      StartOfLinkerOptimizationHint + O.LinkerOptimizationHint.Data.size();
   uint64_t StartOfIndirectSymbols =
       StartOfSymbols + NListSize * O.SymTable.Symbols.size();
   uint64_t StartOfSymbolStrings =
@@ -320,6 +323,11 @@
       MLC.linkedit_data_command_data.dataoff = StartOfDataInCode;
       MLC.linkedit_data_command_data.datasize = O.DataInCode.Data.size();
       break;
+    case MachO::LC_LINKER_OPTIMIZATION_HINT:
+      MLC.linkedit_data_command_data.dataoff = StartOfLinkerOptimizationHint;
+      MLC.linkedit_data_command_data.datasize =
+          O.LinkerOptimizationHint.Data.size();
+      break;
     case MachO::LC_FUNCTION_STARTS:
       MLC.linkedit_data_command_data.dataoff = StartOfFunctionStarts;
       MLC.linkedit_data_command_data.datasize = O.FunctionStarts.Data.size();
@@ -355,7 +363,6 @@
     // LC_ENCRYPT_INFO/LC_ENCRYPTION_INFO_64 need to be adjusted.
     case MachO::LC_ENCRYPTION_INFO:
     case MachO::LC_ENCRYPTION_INFO_64:
-    case MachO::LC_LINKER_OPTIMIZATION_HINT:
     case MachO::LC_LOAD_DYLINKER:
     case MachO::LC_MAIN:
     case MachO::LC_RPATH:
diff --git a/llvm/tools/llvm-objcopy/MachO/MachOReader.cpp b/llvm/tools/llvm-objcopy/MachO/MachOReader.cpp
--- a/llvm/tools/llvm-objcopy/MachO/MachOReader.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/MachOReader.cpp
@@ -150,6 +150,9 @@
     case MachO::LC_DATA_IN_CODE:
       O.DataInCodeCommandIndex = O.LoadCommands.size();
       break;
+    case MachO::LC_LINKER_OPTIMIZATION_HINT:
+      O.LinkerOptimizationHintCommandIndex = O.LoadCommands.size();
+      break;
     case MachO::LC_FUNCTION_STARTS:
       O.FunctionStartsCommandIndex = O.LoadCommands.size();
       break;
@@ -329,6 +332,8 @@
   readExportInfo(*Obj);
   readCodeSignature(*Obj);
   readDataInCodeData(*Obj);
+  readLinkData(*Obj, Obj->LinkerOptimizationHintCommandIndex,
+               Obj->LinkerOptimizationHint);
   readFunctionStartsData(*Obj);
   readIndirectSymbolTable(*Obj);
   readSwiftVersion(*Obj);
diff --git a/llvm/tools/llvm-objcopy/MachO/MachOWriter.h b/llvm/tools/llvm-objcopy/MachO/MachOWriter.h
--- a/llvm/tools/llvm-objcopy/MachO/MachOWriter.h
+++ b/llvm/tools/llvm-objcopy/MachO/MachOWriter.h
@@ -48,6 +48,7 @@
   void writeLinkData(Optional<size_t> LCIndex, const LinkData &LD);
   void writeCodeSignatureData();
   void writeDataInCodeData();
+  void writeLinkerOptimizationHint();
   void writeFunctionStartsData();
   void writeTail();
 
diff --git a/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp b/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp
--- a/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/MachOWriter.cpp
@@ -107,6 +107,16 @@
                      LinkEditDataCommand.datasize);
   }
 
+  if (O.LinkerOptimizationHintCommandIndex) {
+    const MachO::linkedit_data_command &LinkEditDataCommand =
+        O.LoadCommands[*O.LinkerOptimizationHintCommandIndex]
+            .MachOLoadCommand.linkedit_data_command_data;
+
+    if (LinkEditDataCommand.dataoff)
+      Ends.push_back(LinkEditDataCommand.dataoff +
+                     LinkEditDataCommand.datasize);
+  }
+
   if (O.FunctionStartsCommandIndex) {
     const MachO::linkedit_data_command &LinkEditDataCommand =
         O.LoadCommands[*O.FunctionStartsCommandIndex]
@@ -421,6 +431,11 @@
   return writeLinkData(O.DataInCodeCommandIndex, O.DataInCode);
 }
 
+void MachOWriter::writeLinkerOptimizationHint() {
+  return writeLinkData(O.LinkerOptimizationHintCommandIndex,
+                       O.LinkerOptimizationHint);
+}
+
 void MachOWriter::writeFunctionStartsData() {
   return writeLinkData(O.FunctionStartsCommandIndex, O.FunctionStarts);
 }
@@ -490,6 +505,16 @@
                          &MachOWriter::writeDataInCodeData);
   }
 
+  if (O.LinkerOptimizationHintCommandIndex) {
+    const MachO::linkedit_data_command &LinkEditDataCommand =
+        O.LoadCommands[*O.LinkerOptimizationHintCommandIndex]
+            .MachOLoadCommand.linkedit_data_command_data;
+
+    if (LinkEditDataCommand.dataoff)
+      Queue.emplace_back(LinkEditDataCommand.dataoff,
+                         &MachOWriter::writeLinkerOptimizationHint);
+  }
+
   if (O.FunctionStartsCommandIndex) {
     const MachO::linkedit_data_command &LinkEditDataCommand =
         O.LoadCommands[*O.FunctionStartsCommandIndex]
diff --git a/llvm/tools/llvm-objcopy/MachO/Object.h b/llvm/tools/llvm-objcopy/MachO/Object.h
--- a/llvm/tools/llvm-objcopy/MachO/Object.h
+++ b/llvm/tools/llvm-objcopy/MachO/Object.h
@@ -310,6 +310,7 @@
   ExportInfo Exports;
   IndirectSymbolTable IndirectSymTable;
   LinkData DataInCode;
+  LinkData LinkerOptimizationHint;
   LinkData FunctionStarts;
   LinkData CodeSignature;
 
@@ -325,6 +326,8 @@
   Optional<size_t> DySymTabCommandIndex;
   /// The index LC_DATA_IN_CODE load comamnd if present.
   Optional<size_t> DataInCodeCommandIndex;
+  /// The index LC_LINKER_OPTIMIZATIN_HINT load comamnd if present.
+  Optional<size_t> LinkerOptimizationHintCommandIndex;
   /// The index LC_FUNCTION_STARTS load comamnd if present.
   Optional<size_t> FunctionStartsCommandIndex;
 
diff --git a/llvm/tools/llvm-objcopy/MachO/Object.cpp b/llvm/tools/llvm-objcopy/MachO/Object.cpp
--- a/llvm/tools/llvm-objcopy/MachO/Object.cpp
+++ b/llvm/tools/llvm-objcopy/MachO/Object.cpp
@@ -46,6 +46,9 @@
     case MachO::LC_DATA_IN_CODE:
       DataInCodeCommandIndex = Index;
       break;
+    case MachO::LC_LINKER_OPTIMIZATION_HINT:
+      LinkerOptimizationHintCommandIndex = Index;
+      break;
     case MachO::LC_FUNCTION_STARTS:
       FunctionStartsCommandIndex = Index;
       break;