Index: test/tools/llvm-objcopy/strip-all.test
===================================================================
--- test/tools/llvm-objcopy/strip-all.test
+++ test/tools/llvm-objcopy/strip-all.test
@@ -35,6 +35,12 @@
 # RUN: llvm-strip --strip-all %t8
 # RUN: cmp %t2 %t8
 
+# Verify that a positional output file leaves the input unchanged.
+# RUN: cp %t %t10
+# RUN: llvm-strip --strip-all %t10 %t11
+# RUN: cmp %t %t10
+# RUN: cmp %t2 %t11
+
 !ELF
 FileHeader:
   Class:           ELFCLASS64
Index: tools/llvm-objcopy/llvm-objcopy.cpp
===================================================================
--- tools/llvm-objcopy/llvm-objcopy.cpp
+++ tools/llvm-objcopy/llvm-objcopy.cpp
@@ -649,7 +649,7 @@
   CopyConfig Config;
   Config.InputFilename = Positional[0];
   Config.OutputFilename =
-      InputArgs.getLastArgValue(STRIP_output, Positional[0]);
+      InputArgs.getLastArgValue(STRIP_output, Positional.back());
 
   Config.StripDebug = InputArgs.hasArg(STRIP_strip_debug);