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
@@ -5872,13 +5872,13 @@
 
   if (Arg *A = Args.getLastArg(options::OPT_fsplit_machine_functions,
                                options::OPT_fno_split_machine_functions)) {
-    // This codegen pass is only available on x86-elf targets.
-    if (Triple.isX86() && Triple.isOSBinFormatELF()) {
-      if (A->getOption().matches(options::OPT_fsplit_machine_functions))
+    if (!A->getOption().matches(options::OPT_fno_split_machine_functions)) {
+      // This codegen pass is only available on x86-elf targets.
+      if (Triple.isX86() && Triple.isOSBinFormatELF())
         A->render(Args, CmdArgs);
-    } else {
-      D.Diag(diag::err_drv_unsupported_opt_for_target)
-          << A->getAsString(Args) << TripleStr;
+      else
+        D.Diag(diag::err_drv_unsupported_opt_for_target)
+            << A->getAsString(Args) << TripleStr;
     }
   }