diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -7737,8 +7737,11 @@
         assert(CurTC == nullptr && "Expected one dependence!");
         CurTC = TC;
       });
+      UB += C.addTempFile(
+          C.getArgs().MakeArgString(CurTC->getInputFilename(Inputs[I])));
+    } else {
+      UB += CurTC->getInputFilename(Inputs[I]);
     }
-    UB += CurTC->getInputFilename(Inputs[I]);
   }
   CmdArgs.push_back(TCArgs.MakeArgString(UB));