diff --git a/test/CodeGen/struct-matching-constraint.c b/test/CodeGen/struct-matching-constraint.c
new file mode 100644
index 0000000..0e93eb8
--- /dev/null
+++ b/test/CodeGen/struct-matching-constraint.c
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -emit-llvm -march=armv7a %s 
+
+// XFAIL: *
+// XTARGET: arm
+
+typedef struct __simd128_uint16_t
+{
+  __neon_uint16x8_t val;
+} uint16x8_t;
+
+void b(uint16x8_t sat, uint16x8_t luma)
+{
+  __asm__("vmov.16 %1, %0   \n\t"
+                                           "vtrn.16 %0, %1   \n\t"
+   :"=w"(luma), "=w"(sat)
+   :"0"(luma)
+   );
+
+}