diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1269,7 +1269,7 @@
     F += ".dwo";
   };
   if (Arg *A = Args.getLastArg(options::OPT_gsplit_dwarf_EQ))
-    if (StringRef(A->getValue()) == "single")
+    if (StringRef(A->getValue()) == "single" && Output.isFilename())
       return Args.MakeArgString(Output.getFilename());
 
   SmallString<128> T;
diff --git a/clang/unittests/Driver/ToolChainTest.cpp b/clang/unittests/Driver/ToolChainTest.cpp
--- a/clang/unittests/Driver/ToolChainTest.cpp
+++ b/clang/unittests/Driver/ToolChainTest.cpp
@@ -367,6 +367,18 @@
   EXPECT_TRUE(CallbackHasCalled);
 }
 
+TEST(CompilerInvocation, SplitSwarfSingleCrash) {
+  static constexpr const char *Args[] = {"clang",
+                                         "--target=arm-linux-gnueabi",
+                                         "-gdwarf-4",
+                                         "-gsplit-dwarf=single",
+                                         "-c",
+                                         "foo.cpp"};
+  CreateInvocationOptions CIOpts;
+  std::unique_ptr<CompilerInvocation> CI = createInvocation(Args, CIOpts);
+  EXPECT_TRUE(CI); // no-crash
+}
+
 TEST(GetDriverMode, PrefersLastDriverMode) {
   static constexpr const char *Args[] = {"clang-cl", "--driver-mode=foo",
                                          "--driver-mode=bar", "foo.cpp"};