When a class contains a non-empty anonymous union or struct, mark is

as non-empty. Fixes PR7021.

llvm-svn: 102913

1 files changed, 25 insertions, 1 deletions

diff --git a/clang/test/CodeGenCXX/anonymous-union-member-initializer.cpp b/clang/test/CodeGenCXX/anonymous-union-member-initializer.cpp
index ea3eafc9955..adb395021e7 100644
--- a/clang/test/CodeGenCXX/anonymous-union-member-initializer.cpp
+++ b/clang/test/CodeGenCXX/anonymous-union-member-initializer.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm -o - %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -o - %s
 
 struct A {
   union {
@@ -10,3 +10,27 @@ struct A {
 };
 
 A a;
+
+namespace PR7021 {
+  struct X
+  {
+    union { long l; };
+  };
+
+  // CHECK: define void @_ZN6PR70211fENS_1XES0_
+  void f(X x, X z) {
+    X x1;
+
+    // CHECK: store i64 1, i64
+    x1.l = 1;
+
+    // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+    X x2(x1);
+
+    X x3;
+    // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+    x3 = x1;
+
+    // CHECK: ret void
+  }
+}