Make member initializers for union members work correctly.

llvm-svn: 88989
diff --git a/clang/test/CodeGenCXX/member-init-union.cpp b/clang/test/CodeGenCXX/member-init-union.cpp
new file mode 100644
index 0000000..334d5fd
--- /dev/null
+++ b/clang/test/CodeGenCXX/member-init-union.cpp
@@ -0,0 +1,10 @@
+// RUN: clang-cc %s -emit-llvm-only -verify
+
+union x {
+  int a;
+  float b;
+  x(float y) : b(y) {}
+  x(int y) : a(y) {}
+};
+x a(1), b(1.0f);
+