1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index b3cef73e52..41efccfb93 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -2907,6 +2907,17 @@ void darwin::Link::AddLinkArgs(Compilation &C,
       CmdArgs.push_back("-demangle");
   }
 
+  // If we are using LTO, then automatically create a temporary file path for
+  // the linker to use, so that it's lifetime will extend past a possible
+  // dsymutil step.
+  if (Version[0] >= 100 && D.IsUsingLTO(Args)) {
+    const char *TmpPath = C.getArgs().MakeArgString(
+      D.GetTemporaryPath(types::getTypeTempSuffix(types::TY_Object)));
+    C.addTempFile(TmpPath);
+    CmdArgs.push_back("-object_path_lto");
+    CmdArgs.push_back(TmpPath);
+  }
+
   // Derived from the "link" spec.
   Args.AddAllArgs(CmdArgs, options::OPT_static);
   if (!Args.hasArg(options::OPT_static))