New test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3207 91177308-0d34-0410-b5e6-96231b3b80d8

test/CFrontend/2002-08-02-UnionTest.c

@@ -0,0 +1,17 @@
+/* In this testcase, the return value of foo() is being promotedto a register
+ * which breaks stuff
+ */
+#include <stdio.h>
+
+union X { char X; void *B; int a, b, c, d;};
+
+union X foo() {
+	union X Global;
+        Global.B = (void*)123;   /* Interesting part */
+	return Global;
+}
+
+void main() {
+	union X test = foo();
+	printf("0x%p", test.B);
+}