diff --git a/llvm/test/CodeGen/X86/byval.ll b/llvm/test/CodeGen/X86/byval.ll
new file mode 100644
index 000000000000..7c0aeb82327c
--- /dev/null
+++ b/llvm/test/CodeGen/X86/byval.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | llc -march=x86-64 | grep movq.*8.*rsp.*rax
+
+%struct.s = type { i64, i64, i64 }
+
+define i64 @f(%struct.s* byval %a) {
+entry:
+	%tmp2 = getelementptr %struct.s* %a, i32 0, i32 0
+	%tmp3 = load i64* %tmp2, align 8
+	ret i64 %tmp3
+}