Index: lld/MachO/Driver.cpp
===================================================================
--- lld/MachO/Driver.cpp
+++ lld/MachO/Driver.cpp
@@ -224,7 +224,7 @@
   return CHECK(parseCachePruningPolicy(ltoPolicy), "invalid LTO cache policy");
 }
 
-static DenseMap<StringRef, ArchiveFile *> loadedArchives;
+static DenseMap<hash_code, ArchiveFile *> loadedArchives;
 
 static InputFile *addFile(StringRef path, bool forceLoadArchive,
                           bool isExplicit = true, bool isBundleLoader = false) {
@@ -234,6 +234,7 @@
   MemoryBufferRef mbref = *buffer;
   InputFile *newFile = nullptr;
 
+  hash_code hashedPath = hash_value(path);
   file_magic magic = identify_magic(mbref.getBuffer());
   switch (magic) {
   case file_magic::archive: {
@@ -243,7 +244,7 @@
     // We don't take a reference to cachedFile here because the
     // loadArchiveMember() call below may recursively call addFile() and
     // invalidate this reference.
-    if (ArchiveFile *cachedFile = loadedArchives[path])
+    if (ArchiveFile *cachedFile = loadedArchives[hashedPath])
       return cachedFile;
 
     std::unique_ptr<object::Archive> archive = CHECK(
@@ -290,7 +291,7 @@
     }
 
     file->addLazySymbols();
-    newFile = loadedArchives[path] = file;
+    newFile = loadedArchives[hashedPath] = file;
     break;
   }
   case file_magic::macho_object: