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
@@ -574,6 +574,10 @@
     CmdArgs.push_back("-plugin-opt=-data-sections");
   }
 
+  if (Args.hasArg(options::OPT_fsplit_machine_functions)) {
+      CmdArgs.push_back("-plugin-opt=-split-machine-functions");
+  }
+
   if (Arg *A = getLastProfileSampleUseArg(Args)) {
     StringRef FName = A->getValue();
     if (!llvm::sys::fs::exists(FName))
diff --git a/clang/test/Driver/split-machine-functions.c b/clang/test/Driver/split-machine-functions.c
new file mode 100644
--- /dev/null
+++ b/clang/test/Driver/split-machine-functions.c
@@ -0,0 +1,8 @@
+// Test options pass-through with lto
+// RUN: %clang -### -flto -fsplit-machine-functions %s 2>&1 | FileCheck %s -check-prefix=CHECK-PASS
+
+// Test no pass-through to ld without lto
+// RUN: %clang -### -fsplit-machine-functions %s 2>&1 | FileCheck %s -check-prefix=CHECK-NOPASS
+
+// CHECK-PASS:          "-plugin-opt=-split-machine-functions"
+// CHECK-NOPASS-NOT:    "-plugin-opt=-split-machine-functions"