diff --git a/lld/MachO/Driver.h b/lld/MachO/Driver.h
--- a/lld/MachO/Driver.h
+++ b/lld/MachO/Driver.h
@@ -15,6 +15,12 @@
 #include "llvm/Option/OptTable.h"
 #include "llvm/Support/MemoryBuffer.h"
 
+namespace llvm {
+namespace MachO {
+class InterfaceFile;
+}
+} // namespace llvm
+
 namespace lld {
 namespace macho {
 
diff --git a/lld/MachO/InputFiles.cpp b/lld/MachO/InputFiles.cpp
--- a/lld/MachO/InputFiles.cpp
+++ b/lld/MachO/InputFiles.cpp
@@ -543,18 +543,13 @@
 // the first document storing child pointers to the rest of them. When we are
 // processing a given TBD file, we store that top-level document here. When
 // processing re-exports, we search its children for potentially matching
-// documents in the same TBD file. Note that the children themselves don't
-// point to further documents, i.e. this is a two-level tree.
-//
-// ld64 allows a TAPI re-export to reference documents nested within other TBD
-// files, but that seems like a strange design, so this is an intentional
-// deviation.
-const InterfaceFile *currentTopLevelTapi = nullptr;
+// documents in the same TBD file.
 
 // Re-exports can either refer to on-disk files, or to documents within .tbd
 // files.
-static Optional<DylibFile *> loadReexportHelper(StringRef path,
-                                                DylibFile *umbrella) {
+static Optional<DylibFile *>
+loadReexportHelper(StringRef path, DylibFile *umbrella,
+                   const InterfaceFile *currentTopLevelTapi) {
   if (path::is_absolute(path, path::Style::posix))
     for (StringRef root : config->systemLibraryRoots)
       if (Optional<std::string> dylibPath =
@@ -599,8 +594,10 @@
   return false;
 }
 
-void loadReexport(StringRef path, DylibFile *umbrella) {
-  Optional<DylibFile *> reexport = loadReexportHelper(path, umbrella);
+void loadReexport(StringRef path, DylibFile *umbrella,
+                  const InterfaceFile *currentTopLevelTapi) {
+  Optional<DylibFile *> reexport =
+      loadReexportHelper(path, umbrella, currentTopLevelTapi);
   if (reexport && isImplicitlyLinked(path))
     inputFiles.insert(*reexport);
 }
@@ -659,7 +656,7 @@
     auto *c = reinterpret_cast<const dylib_command *>(cmd);
     StringRef reexportPath =
         reinterpret_cast<const char *>(c) + read32le(&c->dylib.name);
-    loadReexport(reexportPath, umbrella);
+    loadReexport(reexportPath, umbrella, nullptr);
   }
 }
 
@@ -706,17 +703,16 @@
     }
   }
 
-  bool isTopLevelTapi = false;
-  if (currentTopLevelTapi == nullptr) {
-    currentTopLevelTapi = &interface;
-    isTopLevelTapi = true;
-  }
+  const InterfaceFile *top_level = nullptr;
+  // If there is no top-level (meaning this tbd is the top-level) or if the
+  // current interface has no parent
+  if (interface.getParent() == nullptr)
+    top_level = &interface;
+  else
+    top_level = interface.getParent(); // Second+ level exporters.
 
   for (InterfaceFileRef intfRef : interface.reexportedLibraries())
-    loadReexport(intfRef.getInstallName(), umbrella);
-
-  if (isTopLevelTapi)
-    currentTopLevelTapi = nullptr;
+    loadReexport(intfRef.getInstallName(), umbrella, top_level);
 }
 
 ArchiveFile::ArchiveFile(std::unique_ptr<object::Archive> &&f)
diff --git a/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libReexportSystem.tbd b/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libReexportSystem.tbd
new file mode 100644
--- /dev/null
+++ b/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libReexportSystem.tbd
@@ -0,0 +1,12 @@
+--- !tapi-tbd-v4
+tbd-version:     4
+archs:            [ i386, x86_64 ]
+uuids:            [ 'i386: 00000000-0000-0000-0000-000000000000', 'x86_64: 00000000-0000-0000-0000-000000000001' ]
+platform:         ios
+install-name:     '/usr/lib/ReexportSystem.dylib'
+reexported-libraries:
+  - archs:      [i386, x86_64]
+    libraries:  ['/usr/lib/libSystem.B.dylib']
+exports:
+  - archs:      [ i386, x86_64 ]
+    symbols:    [ __crashreporter_info__]
diff --git a/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libSystem.tbd b/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libSystem.tbd
--- a/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libSystem.tbd
+++ b/lld/test/MachO/Inputs/iPhoneSimulator.sdk/usr/lib/libSystem.tbd
@@ -7,7 +7,7 @@
 exports:
   - archs:      [ i386, x86_64 ]
     re-exports: [ '/usr/lib/system/libcache.dylib' ]
-    symbols:    [ __crashreporter_info__ ]
+    symbols:    [ __crashreporter_info__]
 --- !tapi-tbd-v3
 archs:            [ i386, x86_64 ]
 uuids:            [ 'i386: 00000000-0000-0000-0000-000000000002', 'x86_64: 00000000-0000-0000-0000-000000000003' ]
diff --git a/lld/test/MachO/reexport-nested-lib.s b/lld/test/MachO/reexport-nested-lib.s
new file mode 100644
--- /dev/null
+++ b/lld/test/MachO/reexport-nested-lib.s
@@ -0,0 +1,14 @@
+# REQUIRES: x86
+# RUN: mkdir -p %t
+
+# RUN: llvm-mc -filetype obj -triple x86_64-apple-darwin %s -o %t/test.o
+# RUN: %lld -o %t/test  -syslibroot %S/Inputs/iPhoneSimulator.sdk -lSystem %t/test.o
+
+.text
+.globl _main
+
+_main:
+  ret
+
+.data
+  .quad __crashreporter_info__
diff --git a/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h b/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h
--- a/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h
+++ b/llvm/include/llvm/TextAPI/MachO/InterfaceFile.h
@@ -338,6 +338,9 @@
   ///\param Document The library to inline with top level library.
   void addDocument(std::shared_ptr<InterfaceFile> &&Document);
 
+  /// Returns the pointer to parent document if exists or nullptr otherwise.
+  InterfaceFile *getParent() const { return parent; }
+
   /// Get the list of inlined libraries.
   ///
   /// \return Returns a list of the inlined frameworks.
@@ -404,6 +407,8 @@
   bool operator!=(const InterfaceFile &O) const { return !(*this == O); }
 
 private:
+  InterfaceFile *parent = nullptr;
+
   llvm::BumpPtrAllocator Allocator;
   StringRef copyString(StringRef String) {
     if (String.empty())
diff --git a/llvm/lib/TextAPI/MachO/InterfaceFile.cpp b/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
--- a/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
+++ b/llvm/lib/TextAPI/MachO/InterfaceFile.cpp
@@ -124,6 +124,7 @@
                                   const std::shared_ptr<InterfaceFile> &RHS) {
                                  return LHS->InstallName < RHS->InstallName;
                                });
+  Document->parent = this;
   Documents.insert(Pos, Document);
 }