diff --git a/lld/MachO/Driver.h b/lld/MachO/Driver.h
--- a/lld/MachO/Driver.h
+++ b/lld/MachO/Driver.h
@@ -43,8 +43,8 @@
 // Check for both libfoo.dylib and libfoo.tbd (in that order).
 llvm::Optional<std::string> resolveDylibPath(llvm::StringRef path);
 
-llvm::Optional<DylibFile *> makeDylibFromTAPI(llvm::MemoryBufferRef mbref,
-                                              DylibFile *umbrella = nullptr);
+llvm::Optional<DylibFile *> loadDylib(llvm::MemoryBufferRef mbref,
+                                      DylibFile *umbrella = nullptr);
 
 uint32_t getModTime(llvm::StringRef path);
 
diff --git a/lld/MachO/Driver.cpp b/lld/MachO/Driver.cpp
--- a/lld/MachO/Driver.cpp
+++ b/lld/MachO/Driver.cpp
@@ -309,10 +309,8 @@
     break;
   case file_magic::macho_dynamically_linked_shared_lib:
   case file_magic::macho_dynamically_linked_shared_lib_stub:
-    newFile = make<DylibFile>(mbref);
-    break;
   case file_magic::tapi_file: {
-    if (Optional<DylibFile *> dylibFile = makeDylibFromTAPI(mbref))
+    if (Optional<DylibFile *> dylibFile = loadDylib(mbref))
       newFile = *dylibFile;
     break;
   }
diff --git a/lld/MachO/DriverUtils.cpp b/lld/MachO/DriverUtils.cpp
--- a/lld/MachO/DriverUtils.cpp
+++ b/lld/MachO/DriverUtils.cpp
@@ -14,6 +14,7 @@
 #include "lld/Common/ErrorHandler.h"
 #include "lld/Common/Memory.h"
 #include "lld/Common/Reproduce.h"
+#include "llvm/ADT/StringSet.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Option/ArgList.h"
 #include "llvm/Option/Option.h"
@@ -166,7 +167,7 @@
   return {};
 }
 
-Optional<DylibFile *> macho::makeDylibFromTAPI(MemoryBufferRef mbref,
+static Optional<DylibFile *> makeDylibFromTapi(MemoryBufferRef mbref,
                                                DylibFile *umbrella) {
   Expected<std::unique_ptr<InterfaceFile>> result = TextAPIReader::get(mbref);
   if (!result) {
@@ -177,6 +178,24 @@
   return make<DylibFile>(**result, umbrella);
 }
 
+static StringSet<> loadedDylibs;
+
+Optional<DylibFile *> macho::loadDylib(MemoryBufferRef mbref,
+                                       DylibFile *umbrella) {
+  StringRef path = mbref.getBufferIdentifier();
+  if (loadedDylibs.contains(path))
+    return {};
+  loadedDylibs.insert(path);
+
+  file_magic magic = identify_magic(mbref.getBuffer());
+  if (magic == file_magic::tapi_file)
+    return makeDylibFromTapi(mbref, umbrella);
+
+  assert(magic == file_magic::macho_dynamically_linked_shared_lib ||
+         magic == file_magic::macho_dynamically_linked_shared_lib_stub);
+  return make<DylibFile>(mbref, umbrella);
+}
+
 uint32_t macho::getModTime(StringRef path) {
   fs::file_status stat;
   if (!fs::status(path, stat))
diff --git a/lld/MachO/InputFiles.cpp b/lld/MachO/InputFiles.cpp
--- a/lld/MachO/InputFiles.cpp
+++ b/lld/MachO/InputFiles.cpp
@@ -457,12 +457,7 @@
     error("could not read dylib file at " + path);
     return {};
   }
-
-  file_magic magic = identify_magic(mbref->getBuffer());
-  if (magic == file_magic::tapi_file)
-    return makeDylibFromTAPI(*mbref, umbrella);
-  assert(magic == file_magic::macho_dynamically_linked_shared_lib);
-  return make<DylibFile>(*mbref, umbrella);
+  return loadDylib(*mbref, umbrella);
 }
 
 // TBD files are parsed into a series of TAPI documents (InterfaceFiles), with
diff --git a/lld/test/MachO/implicit-dylibs.s b/lld/test/MachO/implicit-dylibs.s
--- a/lld/test/MachO/implicit-dylibs.s
+++ b/lld/test/MachO/implicit-dylibs.s
@@ -50,6 +50,11 @@
 # LOAD-NEXT: cmdsize
 # LOAD-NEXT:    name [[DIR]]/libreexporter.dylib
 
+## Check that we don't create duplicate LC_LOAD_DYLIBs.
+# RUN: %lld -syslibroot %t -o %t/test -lSystem -L%t -lreexporter -ltoplevel %t/test.o
+# RUN: llvm-objdump --macho --all-headers %t/test | FileCheck %s \
+# RUN:   --check-prefix=LOAD -DDIR=%t --implicit-check-not LC_LOAD_DYLIB
+
 # RUN: %lld -no_implicit_dylibs -syslibroot %t -o %t/no-implicit -lSystem -L%t -lreexporter %t/test.o
 # RUN: llvm-objdump --bind --no-show-raw-insn -d %t/no-implicit | FileCheck %s --check-prefix=NO-IMPLICIT
 # NO-IMPLICIT:     Bind table: