Index: ELF/Config.h
===================================================================
--- ELF/Config.h
+++ ELF/Config.h
@@ -80,6 +80,7 @@
   llvm::StringMap<uint64_t> SectionStartMap;
   llvm::StringRef Chroot;
   llvm::StringRef DynamicLinker;
+  llvm::StringRef DwoDir;
   llvm::StringRef Entry;
   llvm::StringRef Emulation;
   llvm::StringRef Fini;
Index: ELF/Driver.cpp
===================================================================
--- ELF/Driver.cpp
+++ ELF/Driver.cpp
@@ -695,6 +695,7 @@
   Config->Demangle = Args.hasFlag(OPT_demangle, OPT_no_demangle, true);
   Config->DisableVerify = Args.hasArg(OPT_disable_verify);
   Config->Discard = getDiscard(Args);
+  Config->DwoDir = Args.getLastArgValue(OPT_plugin_opt_dwo_dir_eq);
   Config->DynamicLinker = getDynamicLinker(Args);
   Config->EhFrameHdr =
       Args.hasFlag(OPT_eh_frame_hdr, OPT_no_eh_frame_hdr, false);
Index: ELF/LTO.cpp
===================================================================
--- ELF/LTO.cpp
+++ ELF/LTO.cpp
@@ -99,6 +99,7 @@
   C.SampleProfile = Config->LTOSampleProfile;
   C.UseNewPM = Config->LTONewPassManager;
   C.DebugPassManager = Config->LTODebugPassManager;
+  C.DwoDir = Config->DwoDir;
 
   if (Config->SaveTemps)
     checkError(C.addSaveTemps(Config->OutputFile.str() + ".",
Index: ELF/Options.td
===================================================================
--- ELF/Options.td
+++ ELF/Options.td
@@ -442,6 +442,8 @@
 def plugin_opt_thinlto_index_only_eq: J<"plugin-opt=thinlto-index-only=">;
 def plugin_opt_thinlto_object_suffix_replace_eq: J<"plugin-opt=thinlto-object-suffix-replace=">;
 def plugin_opt_thinlto_prefix_replace_eq: J<"plugin-opt=thinlto-prefix-replace=">;
+def plugin_opt_dwo_dir_eq: J<"plugin-opt=dwo_dir=">,
+  HelpText<"Diretory to store .dwo files when LTO and debug fission are used">;
 
 // Ignore LTO plugin-related options.
 // clang -flto passes -plugin and -plugin-opt to the linker. This is required