1 files changed, 25 insertions, 0 deletions
diff --git a/clang/test/CodeGen/transparent-union.c b/clang/test/CodeGen/transparent-union.c
new file mode 100644
index 0000000..afdb3d6
--- /dev/null
+++ b/clang/test/CodeGen/transparent-union.c
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -Werror -triple i386-unknown-unknown -emit-llvm -o %t %s
+// RUN: FileCheck < %t %s
+//
+// FIXME: Note that we don't currently get the ABI right here. f0() should be
+// f0(i8*).
+
+typedef union {
+  void *f0;
+} transp_t0 __attribute__((transparent_union));
+
+void f0(transp_t0 obj);
+
+// CHECK: define void @f1_0(i32* %a0) 
+// CHECK:  call void @f0(%union.transp_t0* byval align 4 %{{.*}})
+// CHECK:  call void %{{.*}}(i8* %{{[a-z0-9]*}})
+// CHECK: }
+void f1_0(int *a0) {
+  void (*f0p)(void *) = f0;
+  f0(a0);
+  f0p(a0);
+}
+
+void f1_1(int *a0) {
+  f0((transp_t0) { a0 });
+}