diff --git a/llvm/test/CFrontend/2007-04-11-InlineAsmUnion.c b/llvm/test/CFrontend/2007-04-11-InlineAsmUnion.c
new file mode 100644
index 000000000000..28ffe73feca0
--- /dev/null
+++ b/llvm/test/CFrontend/2007-04-11-InlineAsmUnion.c
@@ -0,0 +1,7 @@
+// RUN: %llvmgcc %s -S -emit-llvm -o - | grep 'call void asm'
+
+union U { int x; char* p; };
+void foo() {
+  union U bar;
+  __asm__ volatile("foo %0\n" : "=r"(bar));
+}